Thermo Scientific
FOCUS™ GC
Gas Chromatograph
Service Manual
PN 317 094 95, Revision April 2009
FOCUS™ GC Service Manual
April 2009 Edition
Part Number 317 094 95
© 2007 Thermo Fisher Scientific Inc. All rights reserved.
Printed in Italy
Published by Thermo Fisher Scientific S.p.A., Strada Rivoltana, 20090 Rodano - Milan - Italy
Tel: +39 02 95059373 Fax: +39 02 95059388
Printing History: First Edition, released February 2003
Second Edition, released July 2007
Third Edition, released April 2009
Disclaimer
Technical Information contained in this publication is for reference purposes only and is subject to change without notice. Every effort has
been made to supply complete and accurate information; however, Thermo Fisher Scientific assumes no responsibility and will not be liable
for any errors, omissions, damage, or loss that might result from any use of this manual or the information contained therein (even if this
information is properly followed and problems still arise).
This publication is not part of the Agreement of Sale between Thermo Fisher Scientific and the purchaser of a Thermo Fisher Scientific
system. In the event of any conflict between the provisions of this document and those contained in Thermo Fisher Scientific Terms and
Conditions, the provisions of the Terms and Conditions shall govern.
Reference to System Configurations and Specifications supercede all previous information and are subject to change without notice.
Trademarks
FOCUS™ GC is a trademark of Thermo Fisher Scientific Inc., and its subsidiaries. Other brand and product names may be trademarks or
registered trademarks of their respective companies.
Declaration
Manufacturer:
Thermo Fisher Scientific S.p.A.
Thermo Fisher Scientific S.p.A. is the manufacturer of the instrument described in
this manual and, as such, is responsible for the instrument safety, reliability and
performance only if:
•
installation
•
re-calibration
•
changes and repairs
have been carried out by authorized personnel and if:
•
the local installation complies with local law regulations
•
the instrument is used according to the instructions provided and if its
operation is only entrusted to qualified trained personnel
Thermo Fisher Scientific S.p.A. is not liable for any damages derived from the
non-compliance with the aforementioned recommendations.
Thermo Fisher Scientific S.p.A.
Strada Rivoltana
20090 RODANO (MI)
ITALY
Part of Thermo Fisher Scientific
Thermo Scientific FOCUS GC - Service Manual
3
Contents
About This Manual..................................................................................................................................9
Overview .................................................................................................................................... 9
Conventions Used in This Manual........................................................................................... 10
Instrument Markings and Symbols .......................................................................................... 12
References ................................................................................................................................ 14
FOCUS™ GC Document Set ..................................................................................... 14
Additional References................................................................................................. 14
Classification of the Instrument ............................................................................................... 15
Technical Features ................................................................................................................... 15
Safety Information ................................................................................................................... 16
Use of Gases................................................................................................................ 16
Using Hydrogen ....................................................................................................................... 17
Using the Hydrogen Sensor ........................................................................................ 18
Cleaning and Decontamination ................................................................................................ 18
Chapter 1
Overview............................................................................................................................................. 19
Introduction .............................................................................................................................. 20
How to control the FOCUS GC .................................................................................. 21
The GC Base Unit ....................................................................................................... 21
Instrument Automation ............................................................................................... 22
Internal Automation ....................................................................................... 22
Communication with External Units ............................................................. 22
Autosampler Interface.................................................................................... 22
Data Systems Interface .................................................................................. 22
General Requirements.............................................................................................................. 23
Power Quality ............................................................................................................. 23
Minimum Power Requirements .................................................................................. 23
Gas and Plumbing Requirements................................................................................ 24
Gases Purity Requirements ......................................................................................... 24
Gas Regulators, Gas Lines and Fittings Requirements............................................... 25
Gas Regulators ............................................................................................... 25
Gas Lines ....................................................................................................... 25
Fittings ........................................................................................................... 25
Chapter 2
Additional Technical Information ..................................................................................................... 27
FOCUS GC Overview.............................................................................................................. 28
Thermo Scientific FOCUS GC - Service Manual
v
Contents
FOCUS GC Internal View.......................................................................................... 28
GC Oven ..................................................................................................................... 28
S/SL Injector............................................................................................................... 29
PPKD Injector............................................................................................................. 29
FID Detector ............................................................................................................... 29
TCD Detector ............................................................................................................. 29
Preliminary Tests and Regulations .......................................................................................... 30
Autosamplers Interface............................................................................................................ 38
Kits/Devices Option................................................................................................................. 38
Oven Hydrogen Sensor............................................................................................... 38
Merlin Valve Kit......................................................................................................... 38
Kit LAN for FOCUS GC............................................................................................ 39
Packed Column Installation........................................................................................ 39
Chapter 3
Parts Replacement .............................................................................................................................41
Mechanical Parts Replacement................................................................................................ 42
Oven Section............................................................................................................... 42
Air Flap System .......................................................................................................... 54
Air Flap Section............................................................................................. 54
Pneumatic Modules Section ....................................................................................... 59
Injector Section........................................................................................................... 65
Detector Section ......................................................................................................... 70
Electronic Parts Replacements ................................................................................................ 80
Introduction ................................................................................................................ 80
GC with FID .................................................................................................. 80
GC with TCD ................................................................................................ 81
Electronic Cassette Section ........................................................................................ 81
Electronic Boards Section .......................................................................................... 86
Chapter 4
Electronic Boards Description..........................................................................................................91
General Description ................................................................................................................. 92
Electronic Main Cassette ......................................................................................................... 94
Main Schematic Diagrams....................................................................................................... 96
Introduction to MY04 Main Board.......................................................................................... 97
Power Supply Notes ................................................................................................... 99
General Notes ............................................................................................................. 99
vi
Thermo Scientific FOCUS GC - Service Manual
Contents
Connectors Dismounting on Main MY04 Board ................................................................... 106
MY04 Main Board Sections Description............................................................................... 108
Schematics and Component Layout.......................................................................... 108
Sheet 1/7 (CPU 1) ..................................................................................................... 108
Sheet 2 (CPU2) ......................................................................................................... 109
Sheet 3 (DPFC1) ....................................................................................................... 110
Sheet 4 (DPFC2) ....................................................................................................... 110
Sheet 5 (Power Supply; Valves; Stepper Drivers) .................................................... 111
Sheet 6 (Oven; Zone Heaters; Drivers)..................................................................... 112
Sheet 7 (Oven; Zone Thermoregulators) .................................................................. 112
ELI201 Electrometric Board (FID)........................................................................................ 113
Schematics and Component Layout.......................................................................... 113
Board Description ..................................................................................................... 113
Sheet 1/2 (SP1; V/F; Power Supply)......................................................................... 114
SE 1467 Sheet 2/2 (Auto zero; Gain; Range) ........................................................... 114
CVA201 Electrometer Pre-amplifier Board (FID) ................................................................ 115
Schematics and Component Layout.......................................................................... 115
Board Description ..................................................................................................... 115
TCDI203 Electrometric Board (TCD) ................................................................................... 116
Schematics and Component Layout.......................................................................... 116
Board Description ..................................................................................................... 116
Sheet 1/3.................................................................................................................... 116
Sheet 2/3.................................................................................................................... 117
Sheet 2/3.................................................................................................................... 117
TCDE203 Board (TCD)......................................................................................................... 117
Schematics and Component Layout.......................................................................... 117
Board Description ..................................................................................................... 117
Sheet 1/4.................................................................................................................... 117
Sheet 2/4.................................................................................................................... 118
Sheet 3/4.................................................................................................................... 118
Sheet 4/4.................................................................................................................... 118
FRTMY100 Board and Keypad ............................................................................................. 118
Schematics and Component Layout.......................................................................... 118
Board Description ..................................................................................................... 118
IFM311 LAN Option ............................................................................................................. 119
Schematics and Component Layout.......................................................................... 119
Thermo Scientific FOCUS GC - Service Manual
vii
Contents
Chapter 5
Maintenance and Troubleshooting Notes ........................................................................................121
Maintenance........................................................................................................................... 122
Suggested Maintenance Schedule ............................................................................ 122
Standard Maintenance Schedule............................................................................... 123
Maintenance References........................................................................................................ 124
Maintaining a S/SL Injector ..................................................................................... 124
Refer to: ....................................................................................................... 124
Maintaining a PPKD Injector ................................................................................... 124
Refer to: ....................................................................................................... 124
Maintaining a FID Detector...................................................................................... 125
Refer to: ....................................................................................................... 125
Maintaining a TCD Detector .................................................................................... 125
Refer to: ....................................................................................................... 125
Analytical Troubleshooting Notes......................................................................................... 126
Technical Troubleshooting Notes.......................................................................................... 130
Error Messages ......................................................................................................... 130
Info/Diagnostics........................................................................................................ 132
Hydrogen Sensor Setting .......................................................................................... 135
Changing the GC Manufacturing Data..................................................................... 135
Chapter 6
Schematic Drawings Summary.........................................................................................................137
Drawings List......................................................................................................................... 138
Glossary .............................................................................................................................................. 139
Index.................................................................................................................................................... 145
viii
Thermo Scientific FOCUS GC - Service Manual
About This Manual
Overview
WARNING! This Service Manual must be used with the FOCUS™ GC Operating Manual and
FOCUS™ GC Site Preparation and Installation Manual.
This manual provides detailed information for installing, servicing, and repairing
the FOCUS™ GC. This manual is written primarily for certified service
representatives.
Chapter 1, Overview, contains a general approach to the FOCUS™ GC reporting
for your convenience some information already detailed in the FOCUS™ GC
Documents Set.
Chapter 2, Additional Technical Information, contains important additional
technical information.
Chapter 3, Parts Replacement, contains detailed instructions to replace the most
important mechanical and electronic parts of the FOCUS™ GC.
Chapter 4, Electronic Boards Description, contains a detailed description of the
electronics boards of the FOCUS™ GC.
Chapter 5, Maintenance and Troubleshooting Notes, contains the guides to
maintain the S/SL and PPKD injectors and the FID and TCD detector, then and
analytical and technical troubleshooting notes.
Chapter 6, Schematic Drawings Summary, contains the list of the diagrams.
The Glossary contains definitions of terms used in this manual. This also includes
abbreviations, acronyms, metric prefixes, and symbols.
The Index contains an alphabetical list of key terms and topics in this guide,
including cross references and the corresponding page numbers.
Thermo Scientific FOCUS GC - Service Manual
9
About This Manual
Conventions Used in This Manual
Conventions Used in This Manual
The following symbols and typographical conventions are used throughout this
manual.
Bold
Bold text indicates names of windows, dialog boxes, and
fields.
Italic
Italic indicates cross references, first references to important
terms defined in the glossary, and special emphasis.
Monospace
Monospace, or Courier, indicates filenames and filepaths or
text the user should enter with the keyboard.
Monospace
Bold
Monospace Bold indicates messages, prompts, or menu titles
displayed on the computer screen or on a digital display.
»
This symbol illustrates menu paths to select, such as
File»Open….
KEY NAME
Bold, uppercase sans serif font indicates the name of a key on
a keyboard or keypad, such as ENTER.
CAUTION
This symbol alerts you to an action or sequence that, if
performed improperly, could damage the instrument.
NOTE
This symbol alerts you to important information related to the
text in the previous paragraph.
This symbol alerts you to an action or sequence that, if
WARNING! improperly performed, could result in damage to the
instrument or possible physical harm to the user. This symbol
may be followed by icons indicating special precautions that
should be taken to avoid injury.
This symbol indicates an electric shock hazard.
10
Thermo Scientific FOCUS GC - Service Manual
Conventions Used in This Manual
About This Manual
This symbol indicates danger from hazardous chemicals.
This symbol indicates danger from high temperature surfaces
or substances.
This symbol indicates a fire hazard.
This symbol indicates an explosion hazard.
This symbol indicates a toxic hazard.
This symbol indicates the presence of flammable materials.
This symbol indicates the presence of radioactive material.
This symbol indicates an operation or sequence that must not
be performed by the user. A Thermo Fisher Scientific
authorized Customer Support Engineer must perform this
sequence.
This symbol indicates all metal objects, such as watches and
jewelry, must be taken off.
This symbol indicates an eye hazard. Eye protection must be
worn.
This symbol indicates the user must wear a protective screen
when performing the sequence.
Thermo Scientific FOCUS GC - Service Manual
11
About This Manual
Instrument Markings and Symbols
This symbol indicates the user must wear protective shoes
when performing the sequence.
This symbol indicates the user must wear protective clothing
when performing the sequence.
This symbol indicates the user must wear gloves when
performing the sequence.
Instrument Markings and Symbols
The following table explains the symbols used on Thermo Fisher Scientific
instruments. Only a few of them are used on the FOCUS™ GC gas
chromatograph. See the asterisk.
Symbol
Description
Direct Current
*
Alternating Current
Both direct and alternating current
Three-phase alternating current
3
Earth (ground) terminal
Protective conductor terminal
Frame or chassis terminal
12
Thermo Scientific FOCUS GC - Service Manual
Instrument Markings and Symbols
About This Manual
Symbol
Description
Equipotentiality
*
On (Supply)
*
Off (Supply)
Equipment protected throughout by DOUBLE
INSULATION or REINFORCED INSULATION
(Equivalent to Class II of IEC 536)
*
Instruction manual symbol affixed to product. Indicates that
the user must refer to the manual for specific Warning or
Caution information to avoid personal injury or damage to
the product.
Caution, risk of electric shock
*
Caution, hot surface
*
Caution, biohazard
In-position of a bistable push control
Out-position of a bistable push control
*
Thermo Scientific FOCUS GC - Service Manual
Symbol in compliance to the Directive 2002/96/EC on
Waste Electrical and Electronic Equipment (WEEE) placed
on the european market after August, 13, 2005.
13
About This Manual
References
References
FOCUS™ GC Document Set
Site Preparation and Installation Manual (PN 317 094 11)
This manual and diskette describes how to set up a workspace for the FOCUS™
GC and how to connect the FOCUS™ GC to the gas supplies and peripheral
devices.
Instruction Manual (PN 317 094 12)
This manual provides descriptions of the FOCUS™ GC hardware and software
and instructions for their use.
Spare Parts Catalog (PN 317 094 13)
This catalog contains a list of spare parts for the FOCUS™ GC.
Additional References
Kit LAN for FOCUS GC (PN 190 506 15) - Installation Guide (PN 317 094 82)
This guide provides the instruction for installing the Kit LAN on the FOCUS GC.
Merlin Microseal™ Kit for S/SL and PTV Inlet System (PN 190 502 05) Installation Guide (PN 317 093 65)
This guide provides the instructions to install the Merlin Microseal™ High
Pressure Septum kits on the capillary S/SL and PTV inlet systems.
AI 3000/AS 3000 Operating Manual (317 093 92)
This manual contains description of the features and components of the AI 3000/
AS 3000 Autosampler. Inside, you will find all of the information for routine
operation.
TriPlus Operating Manual (PN 317 094 41)
This manual contains description of the features and components of the TriPlus
AS/HS/SPME autosampler. Inside, you will find all of the information for routine
operation of your autosampler.
14
Thermo Scientific FOCUS GC - Service Manual
Classification of the Instrument
About This Manual
Classification of the Instrument
Environmental Conditions
•
Internal use.
•
Altitude up to 2000 meters.
•
Temperature from 15 to 35 °C.
•
Maximum relative humidity between 30% and 85%.
•
Voltage variations not exceeding +/- 10% of the nominal value.
•
Transients according to installation categories II.
•
Degree of pollution according to IEC 664 (3.7.3) 2.
Technical Features
The following table summarizes the major technical features of the FOCUS™ GC
Features Description
•
External Interface
— RS232 Serial Line
•
Power Supply
— 120 Vac; 50/60 Hz; 1600 VA
— 230 Vac; 50/60 Hz; 1600 VA
•
Dimensions
— 680 x 640 x 440 mm (h x l x w)
•
Mass
— About 30 kg
Thermo Scientific FOCUS GC - Service Manual
15
About This Manual
Safety Information
Safety Information
WARNING! When, for technical reasons, it is necessary to work on instrument parts which may
involve an hazard (moving parts, components under voltage, etc.) the authorized
Field Technical Service must be contacted. This type of situations can be identified
because access to these parts is possible only by using a tool.
The removable protective covers bear a warning symbol suggesting to refer to the
documentation accompanying the instrument.
Should an operator perform a maintenance operation, he/she must have received
proper training to carry out that specific action. Before using dangerous substances
(toxic, harmful, etc.), please read the hazard indications and information reported in
the Safety Sheet supplied by the manufacturer referring to the relevant CAS (Chemical Abstract Service) number.
The instrument must be used according to the specifications of this guide. Improper
use can adversely affect the instrument protection. The analytical operation requires
the use of chemical substances having different hazard specifications.
Before using chemicals, please read the hazard indications and information
reported in the Safety Sheet supplied by the manufacturer referring to the relevant
CAS (Chemical Abstract Service) number.
Use of Gases
WARNING! Before using gases, carefully read the hazard indications and information reported
in the Safety Sheet supplied by the manufacturer referring to the CAS (Chemical
Abstract Service) number. It is the user’s responsibility to see that all local safety
regulations for the use of gases are obeyed.
16
Thermo Scientific FOCUS GC - Service Manual
Using Hydrogen
About This Manual
Using Hydrogen
The use of hydrogen as a carrier gas or as fuel for certain flame detectors requires
the operator’s strict attention and compliance with special precautions due to the
hazards involved.
Hydrogen is a dangerous gas, particularly in an enclosed area when it reaches a
concentration corresponding to its lower explosion level (4% in volume). When
mixed with air it can create an explosive mixture. An explosion hazard could
develop in the GC oven when hydrogen is used as a carrier gas if oven elements
are not perfectly connected to each other, or if the connection materials are worn
out, broken, or otherwise faulty.
Use the following safety precautions when using hydrogen:
•
Ensure that all hydrogen cylinders comply with the safety requirements for
proper use and storage. Hydrogen cylinders and delivery systems must comply with local regulations.
•
Make sure the gas supply is turned completely off when connecting hydrogen
lines.
•
If an electronic leak test meter should not be available, perform a bubble test
to ensure that the hydrogen lines are leak-tight before using the instrument.
Perform this test after the pressure test described in the Testing for Leaks
paragraph in FOCUS™ GC Site Preparation and Installation Guide Manual.
Repeat this test to eliminate all leaks.
•
Ensure your GC column oven has a Thermo Fisher Scientific hydrogen sensor. A hydrogen sensor continuously monitors the hydrogen level in the GC
column oven.
If your GC oven does not have a hydrogen sensor already installed, contact your
Thermo Fisher Scientific sales representative. To comply with instrument safety
requirements, a Thermo Fisher Scientific CSE or authorized service technician
should install the sensor.
If you plan to use a sensor other than the recommended Thermo Fisher Scientific
sensor, you must verify its ability to perform the functions listed above before
installing it. It must comply with your local safety regulations, or with the IEC
61010 regulations if local regulations do not exist.
Thermo Scientific FOCUS GC - Service Manual
17
About This Manual
Cleaning and Decontamination
Using the Hydrogen Sensor
The lower limit of the hydrogen sensor is 0.5% in volume. You should adjust the
detection threshold to 1% in volume, which is 25% of the hydrogen lower limit of
explosion (4% in volume). In cases where the connections begin to leak or the
column breaks, the sensor alerts the operator. Then it automatically cuts off the
gas supply and heating to the active zones, and sweeps the column oven with
forced air ventilation. If the sensor detects anomalies or leaks during GC
operation due to instrument malfunction, the operator must immediately:
•
close the hydrogen supply
•
switch off the gas chromatograph
•
air out the room
The reliability of the sensor depends on careful maintenance. After the sensor is in
use, you must periodically check its operating performance and calibration as
recommended by the manufacturer. Refer to your hydrogen sensor’s instruction
manual for maintenance guidelines.
WARNING! Never use hydrogen in FOCUS™ GC unless your GC oven has a hydrogen sensor
installed.
Thermo Fisher Scientific CSEs are not authorized to install or repair any instrument
using hydrogen as a carrier gas unless the instrument is equipped with the appropriate sensor.
Cleaning and Decontamination
Normal usage of the FOCUS™ GC can cause the exterior to get dirty. Clean the
outer surfaces by wiping them with a cloth dampened with water.
In the event that a hazardous material is spilled on or in the instrument, clean the
spill according to the procedures in the Material Safety Data Sheet for that
substance.
18
Thermo Scientific FOCUS GC - Service Manual
Overview
1
This chapter contains an overview of the FOCUS™ GC reporting for your
convenience some information already detailed in the FOCUS™ GC Documents
Set. Recommended test equipment and suggested tools are also included.
Chapter at a Glance…
Introduction ..........................................................................................................20
General Requirements ..........................................................................................23
Thermo Scientific FOCUS GC - Service Manual
19
Chapter 1
Overview
Introduction
Introduction
The available configurations of the FOCUS GC are:
•
S/SL injector on the right side and a FID detector on the left side of the GC.
•
PPKD injector on the right side and a TCD detector on the left side of the GC.
The carrier gas to the injector is supplied through a DPFC module, instead the
detector gases are supplied to the detector base body through a conventional
pneumatic module (non-DGFC).
The pneumatic modules are located on the top rear side of the GC.
The parts interested are:
•
S/SL injector
•
PPKD injector
•
FID detector
•
TCD detector
•
Injector and detector gas control modules
•
PT100 oven temperature sensor.
All the other parts have been new designed for the FOCUS™ GC.
NOTE
20
No other configurations and no other detectors type are available.
Thermo Scientific FOCUS GC - Service Manual
Chapter 1
Overview
Introduction
How to control the FOCUS GC
The GC can be controlled as stand alone or through a dedicated Thermo Fisher
Scientific data system.
In the first case, all the parameters must be set using the GC keypad and the output
detector signal will be processed through a data system such as Chrom-Card,
ChromQuest, Xcalibur, etc.
In the second case, the data system will control both the GC parameters setting
and the output detector signal.
The GC Base Unit
The GC base unit includes the four major components of the FOCUS GC.
•
Pneumatic compartment
•
Analytical unit
•
Electronic compartment
•
Status panel and keypad
Thermo Scientific FOCUS GC - Service Manual
21
Chapter 1
Overview
Introduction
Refer to:
•
Chapter 1 of the FOCUS GC Instruction Manual
Instrument Automation
FOCUS GC contains several automated features for running the GC,
communicating with other analysis equipment, and interacting with a data system.
Internal Automation
You program internal automation by entering run time events in special menus.
You can set these events to execute at specified times after start analysis.
Communication with External Units
You can connect the GC to external modules and accessories, such as
data systems, autosamplers and hydrogen sensor.
Autosampler Interface
The TriPlus AS, HS, SPME or AI 3000/AS 3000 autosampler can be connected to
the GC.
Data Systems Interface
Your FOCUS GC generates analog and digital data output when you perform
chromatographic analysis. A computer with a data system or a computing
integrator can be used to process the data from the GC.
Refer to:
•
22
Chapter 1 of the FOCUS GC Instruction Manual
Thermo Scientific FOCUS GC - Service Manual
Chapter 1
Overview
General Requirements
General Requirements
This paragraph summarizes general FOCUS GC requirements already described
in the FOCUS™ GC Site Preparation and Installation Manual.
The GC has been developed to have an easy use but also an easy and fast
installation procedure. No particular set must be performed after the GC
installation to have the system running. The simple installation without meet
inconvenient and troubles will be obtained also if the instructions reported below
will be respected.
•
Power Quality
•
Minimum Power Requirements
•
Gas and Plumbing Requirements
•
Gases Purity Requirements
•
Gas Regulators, Gas Lines and Fittings Requirements
Power Quality
The quality of power supplied to your GC system must be stable and within the
general specifications listen below. The line must be free of fluctuation due to
slow changes in the average voltage, surges sags, transients and harmonics.
The GC must be connected according with its power set, to the an acceptable
source of power.
Minimum Power Requirements
120 Vac
230 Vac
Voltage
120 VAC + 6% -10%
230 VAC ±10%
Frequency
50/60 Hz
50/60 Hz ± 2 Hz
Power requirements
13.3 A
7A
Maximum power consumption
during full power heat-up
1600 W
1600 W
Average power consumption
400 W
400 W
Thermo Scientific FOCUS GC - Service Manual
23
Chapter 1
Overview
General Requirements
Gas and Plumbing Requirements
WARNING! All Thermo Fisher Scientific gas chromatographs are designed to use an inert gas
as the carrier gas.
If you wish to use hydrogen as carrier gas, you must install a hydrogen sensor.
Contact a Thermo Fisher Scientific sales representative if you plan to use hydrogen
as the carrier gas in your new FOCUS GC.
If you do not have the hydrogen sensor, you must use an inert carrier gas.
The use of hydrogen gas as carrier gas without the hydrogen sensor installed on the
FOCUS™ GC is under the user responsibility only.
Gases Purity Requirements
The following notes describe the minimum requirements for gases used in your
gas chromatograph system:
Gas
Purity Requirements
Helium for
carrier gas
99.995% high purity, with less than 1.0 ppm each of water,
oxygen and total hydrocarbons after purification. Use a
regulator with a CGA 580 connection or equivalent.
Hydrogen for
detector fuel gas
and/or carrier gas
99,995% high purity, with less than 1.0 ppm each of water,
oxygen and total hydrocarbons after purification. Use a
regulator with a CGA 350 connection or equivalent.
Nitrogen for
detector fuel gas
and/or carrier gas
99.995% high purity with less than 1.0 ppm of total
hydrocarbons after purification. Use a regulator with a
CGA 580 connection or equivalent.
Air for detector
fuel gas
99.995% high purity. Use a regulator with a CGA 0590
connection or equivalent.
WARNING! Air compressors are not acceptable because they do not meet pressure, water and
hydrocarbon requirements.
NOTE
24
Use of water, oxygen and hydrocarbon traps are suggested.
Thermo Scientific FOCUS GC - Service Manual
Chapter 1
Overview
General Requirements
Gas Regulators, Gas Lines and Fittings Requirements
Gas Regulators
Gas tanks may be equipped with either single or dual-stage regulators that contain
stainless steel diaphragms. The regulator output pressure should be adjustable
•
from 300 to 1000 kPa (45-145 psi) for the DPFC module
•
350 kPa (51 psi) for each line of the non-DGFC module
Gas Lines
The tubings connected to the FOCUS GC must be new.
In case of used tubings, please pay attention that they are oil and moisture free.
In case of doubts, they must be cleaned before to be connected to the GC as
described in Cleaning and Purging Gas Lines operating sequence in Chapter 2 of
this manual.
Fittings
The GC can be installed by using 2 mm OD and 1/8” OD tubings.
According with the tubing used the 2 mm OD and 1/8” OD ferrules must be used.
Thermo Scientific FOCUS GC - Service Manual
25
Chapter 1
Overview
26
General Requirements
Thermo Scientific FOCUS GC - Service Manual
Additional Technical
Information
2
This chapter contains additional technical information.
Chapter at a Glance…
FOCUS GC Overview..........................................................................................28
Preliminary Tests and Regulations .......................................................................30
Autosamplers Interface.........................................................................................38
Kits/Devices Option .............................................................................................38
Operating Sequences
Cleaning and Purging Gas Lines ..........................................................................30
External GC Leak Test .........................................................................................31
Injector Manual Leak Test....................................................................................32
Detector Base Body Manual Leak Test ................................................................33
DPFC Module Calibration....................................................................................35
Thermo Scientific FOCUS GC - Service Manual
27
Chapter 2
Additional Technical Information
FOCUS GC Overview
FOCUS GC Overview
This section provides a brief description of the FOCUS GC.
FOCUS GC Internal View
According to the GC S/SL-FID, S/SL-TCD or PPKD-TCD configuration, the
components located inside the GC unit are:
•
GC Oven
•
S/SL Injector
•
PPKD Injector
•
FID Detector
•
TCD Detector
GC Oven
The GC oven, shown in Figure 2-1, includes the following components.
•
The PT100 oven temperature sensor is separately from the oven diaphragm
but positioned and fixed on front of the diaphragm and it could be removed
from the top of the GC.
•
The oven heater (1300 W), located on the rear of the oven diaphragm.
•
The oven fan located besides the oven diaphragm.
1
1. Oven PT 100 Holder
Figure 2-1. Oven Internal View
28
Thermo Scientific FOCUS GC - Service Manual
Chapter 2
Additional Technical Information
FOCUS GC Overview
Refer to:
•
Chapter 4 of the FOCUS GC Instruction Manual
S/SL Injector
Split/splitless injector (S/SL) is located on the RIGHT side of the GC. The S/SL
injector is gas supplied through a DPFC module (250 or 1000 kPa).
Refer to:
•
Chapter 5 of the FOCUS GC Instruction Manual
PPKD Injector
Purged packed column injector (PPKD) is located on the RIGHT side of the GC.
Refer to:
•
Chapter 6 of the FOCUS GC Instruction Manual
FID Detector
Flame Ionization Detector (FID) is located on the LEFT side of the GC. FID is not
visible because it is covered from the detector cover. The detector can be reached
pulling up its cover manually. FID is gas supplied through a non-DGFC module
(350 kPa).
Refer to:
•
Chapter 8 of the FOCUS GC Instruction Manual
TCD Detector
Thermal Conductivity Detector (TCD) is located on the LEFT side of the GC.
TCD is not visible because it is covered from the detector cover. The detector can
be reached pulling up its cover manually. TCD is gas supplied through a dedicated
DGFC module.
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Preliminary Tests and Regulations
Refer to:
•
Chapter 9 of the FOCUS GC Instruction Manual
Preliminary Tests and Regulations
This paragraph contains the instruction to perform the preliminary test and
regulation of parts of the FOCUS GC.
To perform the operations, refer to the following operating sequences:
•
Cleaning and Purging Gas Lines on page 30
•
External GC Leak Test on page 31.
•
Injector Manual Leak Test on page 32.
•
Detector Base Body Manual Leak Test on page 33.
•
DPFC Module Calibration on page 35.
OPERATING SEQUENCES
Cleaning and Purging Gas Lines
The used tubings must be cleaned before connecting them to the gas regulator and
GC operating as follows:
1. Remove all the traps if present.
2. The tubings must be solvent-flushed and purge-dried with an inert gas as
helium or nitrogen.
3. Flush gas lines using acetone or hexane, NEVER use chlorinate solvents.
4. When flushing gas lines, collect the solvent passing through the gas line and
inspect it for discoloration or residue. Continue to flush gas lines until all
waste solvent is free of discoloration and residue.
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5. Purge the gas lines for several minutes with an inert gas having a pressure of
35 kPa (5 psi) to make sure the gas line is free of all traces of solvent.
6. Install the new traps.
7. Connect the cleaned tubings to the GC.
OPERATING SEQUENCES
External GC Leak Test
After the tubings connection to the GC, the external leak test must be performed
as follows:
1. Switch OFF the GC.
2. Adjust the air, hydrogen and make up gas regulators to 350 kPa (51 psi).
3. Adjust the carrier gas regulator to 300 kPa (45 psi) or 700 kPa (100 psi) or
1000 kPa (145 psi) according to the pneumatic module installed.
4. Wait some minutes to pressurize well the external gas lines.
5. Close the gas regulators and verify that there is no loss of pressure.
WARNING! In case of leaks, do not use the Liquid soap but an electronic leak detector.
After the external leak test, the GC installation can continue with the installation
of the column (see the FOCUS™ GC Operating Manual).
NOTE
The internal leak test has been already performed in the factory during the FOCUS GC
analytical test.
In case of trouble where the injector and detector are suspected of leaks, please
follow the instruction reported in the Injector Manual Leak Test and Detector
Base Body Manual Leak Test operating sequences.
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OPERATING SEQUENCES
Injector Manual Leak Test
Perform the injector manual leak test operating as follows:
1. Adjust the carrier gas regulator to 300 kPa (45 psi) or 700 kPa (100 psi) or
1000 kPa (145 psi) according to the pneumatic module installed.
2. Close the bottom side of the injector with a cap.
3. Switch ON the GC.
4. After the GC auto test, verify that all the temperatures are set to the room
temperature or to 50 °C maximum, then, set the carrier pressure to 100 kPa
(15 psi).
5. Close manually the purge and split lines on the injector using the GC keypad.
6. Verify on the display that the ACT pressure value is equal to the SETPOINT
value.
7. Wait one-two minutes to pressurize well the injector, then set the carrier gas
to OFF.
8. If the system is leak free, the ACT pressure value does not change.
WARNING! In case of leaks, do not use the liquid soap but an electronic leak test meter.
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OPERATING SEQUENCES
Detector Base Body Manual Leak Test
NOTE
The leal test of the detector base body CANNOT BE performed alone. It is caused from the
non-DGFC modules that supply the gases to the detector base body where no pressure or
flow is shown on the GC display. For this reason the capillary detector base body leak test
MUST BE performed using the carrier gas and connecting the column between the base
body and the injector as described on the procedure below:
Perform the injector and detector base body leak test as follows:
1. Set the detector gas regulators to OFF.
2. Adjust the carrier gas regulator to 300 kPa (45 psi) or 700 kPa (100 psi) or
1000 kPa (145 psi) according to the pneumatic module installed.
3. Install the test capillary column between the injector and the capillary detector
base body.
NOTE
Instruction on the capillary column installation are provided in the chapter “Columns” of the
FOCUS™ GC Operating Manual.
4. Remove the small detector top cover.
5. Only for FID
Remove the FID detector loosing the its fixing screw without removing the
FID cables from the detector and close the top of the capillary detector base
body with a brass cap.
6. Only for TCD
Close the carrier/make-up channel outlet with the pressure meter.
7. Switch ON the GC
8. After the FOCUS™ GC auto test, verify that all the GC temperature are set to
the room temperature or 50 °C maximum, then set the carrier pressure to 100
kPa (15 psi). The auxiliary detector gases must be set to OFF.
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Preliminary Tests and Regulations
In the case of TCD, the filaments must be OFF.
9. Close manually the Purge and Split lines on the injector using the GC keypad.
10. Verify on the display that the ACT pressure value is equal to the SETPOINT
value. Wait five minutes to pressurize well the injector, the test column and
the detector base body, then set the carrier gas to OFF.
CAUTION
If different column length is installed, more time must be required to equilibrate the
circuit.
11. If the system is leak free, the ACT pressure value does not change.
WARNING! In case of leaks, do not use the liquid soap but an electronic leak test meter.
12. Switch OFF the GC.
13. Only for TCD
Remove the pressure meter from the carrier/make-up channel outlet.
Close the reference channel outlet with the pressure meter and repeat the
operations starting from the point 7.
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OPERATING SEQUENCES
DPFC Module Calibration
Please refer to:
•
DPFC Module Calibration By Using Kit PN 190 501 20
•
DPFC Software Calibration with K=1
DPFC Module Calibration By Using Kit PN 190 501 20
WARNING! This operating sequence must be performed only when required.
Only the DPFC carrier gas module could be calibrated by using the kit
PN 190 501 20.
In addition to the calibration kit, two measurement instruments as Digital Flow
meter and Digital Pressure gauge are used to perform the DPFC module
calibration. The two measurement instruments are not included in the kit.
The J&W ADM1000 Digital Flow meter and the FLUKE Digital Pressure gauge
713 100G are the measurement instruments used in our factory to perform the
DPFC module calibration. Different instruments could be used but in this case
they must have the following technical characteristics:
Digital Flow Meter
•
Flow range: from 0,1 to 1000 ml/min auto-ranging
•
Accuracy: ± 3% of reading
•
Operating temperature range: from 0 °C to 45 °C
•
Power: 9 V battery (alkaline)
•
Compatible with all non-corrosive gases
Digital Pressure Gauge
•
Pressure Input range: from 0 to 100 psi (0 - 689,5 kPa)
•
Accuracy: ± 0,05% of range
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•
Maximum non-destructive pressure: 2 x top of range (200 psi, 1380 kPa, 13,8
bar)
•
Operating temperature: from -10 °C to 55 °C
Perform the DPFC carrier module calibration as follows:
1. Switch OFF the GC and connect the RS232 cable between the GC and the PC.
2. Load in the PC the calibration software (PN 274 000 20) included in the kit.
3. Replace the current injector septum cap with the relative joint included in the
kit.
4. Connect the Kit Calibration Box, the measurement instruments and the
injector joint as shown in Figure 2-2.
Not Used
2
DETECTOR
FLUKE
PRESSURE
GAUGE
FLUKE
PRESSURE
GAUGE
INJECTOR
1
3
A
B
To Injector
J&W
FLOW METER
J&W
FLOW
METER
Figure 2-2. Kit Calibration Box Connections
5. Remove the column from the injector if present and close its bottom inlet with
a cap.
6. Switch ON the GC.
7. After the GC auto test, set the carrier pressure to 30 kPa.
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8. Set the injector and oven temperatures to 40 °C.
9. On the PC, launch the calibration software and follow the instructions shown
on the video.
10. When the injector calibration procedure has been completed, power the GC
Off. Assemble the injector as the analytical method required, then power ON
the GC.
DPFC Software Calibration with K=1
This new calibration procedure has been developed mainly to help the Field
Service Engineer to perform checking and troubleshooting on the DPFC (Digital
Pressure Flow Controller) pneumatic modules in order to avoid an unnecessary
replacement of the DPFC module when the calculated K-Factor is far to the
nominal one.
Before performing this procedure, it is important to check all other possible
causes such as leaks, column length, carrier gas type, etc.
Tools Required
The perform the procedure the following tools are required:
NOTE
•
DPFC Software Calibration Version 3.6.1.The software can be dowloaded
free from the Milan Tech Support Web www.ceinstruments.it.
•
Calibrated Restrictor for DPFC with K=1.the restrictor is equipped by the
own Certificate of Calibration.
The calibrated restrictor must be ordered with PN 245 059 07.
Refer to:
•
DPFC Software Calibration with K=1 Troubleshooting Guide
(PN 317 110 16)
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Autosamplers Interface
Autosamplers Interface
TriPlus AS, HS, SPME, AI 3000/AS 3000 autosamplers could be installed on the
FOCUS GC.
Each autosampler is installed on the GC by using a dedicated bracket.
Kits/Devices Option
This paragraph contains technical notes about the kits and devices option
available with the FOCUS GC.
Oven Hydrogen Sensor
The hydrogen sensor could be installed on the GC as optional device, following
the installation notes reported on the dedicated operating manual.
See also Hydrogen Sensor Setting in Chapter 5 of this manual.
Merlin Valve Kit
The Merlin Valve option (only for manual injection) could be installed on the
standard S/SL injector of the GC ordering a dedicated kit PN 190 502 05.
NOTE
In case the GC should be equipped with a TriPlus or AI 3000 / AS3000 autosampler, in
addition of the above mentioned kit, a dedicated autosampler upgrade kit must be ordered
using the PN 190 502 25.
More information could be found on the TriPlus or AI 3000 / AS 3000 Operating Manual.
Refer to:
38
•
Merlin Microseal™ Kit for S/SL and PTV Inlet System - Installation Guide
(PN 317 093 65)
•
AI 3000/AS 3000 Operating Manual (PN 317 093 92)
•
TriPlus Operating Manual (PN 317 094 41)
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Kits/Devices Option
Kit LAN for FOCUS GC
This kit, PN 190 506 15, provides the materials for installing the LAN option on
the GC.
Refer to:
•
Kit LAN for FOCUS GC - Installation Guide (PN 317 094 82)
Packed Column Installation
On the FOCUS GC, ONLY the 1/4” and 1/8” OD metal packed columns could be
installed by using the kit PN 190 500 96.
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40
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Parts Replacement
3
This chapter contains detailed instructions to replace the most important
mechanical and electronic parts of the FOCUS™ GC.
Chapter at a Glance…
Mechanical Parts Replacement.............................................................................42
Electronic Parts Replacements .............................................................................80
Operating Sequences
How to Remove the Top and Rear Covers ...........................................................43
How to Replace Oven Sensor...............................................................................45
How to Replace Oven Heater ...............................................................................47
How to Replace the Oven Fan..............................................................................50
How to Replace the Oven Fan Motor...................................................................51
How to Replace the Oven Door Switch ...............................................................52
How to Replace the Air Flap Stepping Motor......................................................55
How to Replace Air Flap Spring ..........................................................................58
How to Replace the DPFC Module ......................................................................60
How to Replace the Non-DGFC Module .............................................................62
How to Replace the S/SL or PPKD Injector Assembly .......................................65
How to Replace the S/SL or PPKD Temperature Sensor and Heater ..................69
How to Replace the CB71 Detector Base Body Assembly..................................71
How to Replace the FID Temperature Sensor and Heater ...................................74
How to Replace the TCD Detector Assembly......................................................76
How to Replace the Complete Electronic Main Cassette.....................................82
How to Replace the Front Panel...........................................................................85
How to Replace MY04 and Electrometric Boards ...............................................87
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How to Replace The CVA201 Pre-amplifier Box................................................ 88
How to Replace The TCDE203 Box.................................................................... 89
Mechanical Parts Replacement
This paragraph details the instructions to replace the most important mechanical
parts of the FOCUS GC. To replace the mechanical parts, please refer to the
operating sequences reported in the following sections of this paragraph and to the
FOCUS GC Spare Parts Catalog.
NOTE
•
How to Remove the Top and Rear Covers on page 43.
•
Oven Section on page 42.
•
Air Flap System on page 54.
•
Pneumatic Modules Section on page 59.
•
Injector Section on page 65.
•
Detector Section on page 70.
•
Electronic Cassette Section on page 81.
•
Electronic Boards Section on page 86.
Read the entire procedures completely to familiarize yourself with the disassembly process
before proceed.
Oven Section
This section contains the instruction to replace the oven parts.
Perform the operations referring to the relevant operating sequences.
42
•
Oven Sensor, refer to How to Replace Oven Sensor on page 45.
•
Oven Heater, refer to How to Replace Oven Heater on page 47.
•
Oven Fan, refer to How to Replace the Oven Fan on page 50.
•
Oven Fan Motor, refer to How to Replace the Oven Fan Motor on page 51.
•
Oven Door Switch, refer to How to Replace the Oven Door Switch on
page 52.
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OPERATING SEQUENCES
How to Remove the Top and Rear Covers
Top Cover
The top cover is fixed on the main unit with two front screws and two clips.
The top cover can be removed without removing the rear cover from the GC.
The two front screws are visible ONLY opening the oven door (see Figure 3-1).
Figure 3-1. Top Aluminium Cover Removal (1)
1. Unscrew the two screws; them remain on the main unit.
2. Manually remove top cover pulling it up from the front, the two clips will be
automatically unlocked. In this mode, the rear cover can be left on the GC.
Rear Cover
WARNING! Before removing the covers, the GC MUST BE switched off to avoid that the over
motor and the cooling fan are running during the operation.
The rear cover is fixed on the main unit with four Allen screws as shown in
Figure 3-2.
1. Unscrew and remove the four Allen screws that secures the rear cover by
using 3-mm Allen wrench.
2. Remove the rear panel.
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1. Carrier Gas Inlet Port
2. Detector Gas Inlet Ports
3. Servo Air Inlet port for GSV
4. Gas Sampling Valve Sample In/Out Ports
5. Oven Exhaust Vent Area
6. Electrical connections
7. Fixing Screws
Figure 3-2. Rear Panel
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OPERATING SEQUENCES
How to Replace Oven Sensor
Perform the temperature sensor replacement operating as follows:
1. Disconnect the GC rear power cord from the main power line.
2. Remove the GC top and rear covers as described in the operating sequence
How to Remove the Top and Rear Covers on page 43.
3. Remove the small back cover on the rear GC bottom side unscrewing its nut.
See respectively A and B of Figure 3-3.
A
B
A. Back Cover
B. Back Cover Nut
Figure 3-3. Back Cover Removal (1)
4. Take note about the temperature sensor position because the new one MUST
BE positioned in the same place, then loosen the Allen screw of the
temperature sensor holder located in the oven (see 1 of Figure 3-4).
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1
1. Temperature Sensor Fixing Screw
Figure 3-4. Oven Temperature Sensor (1)
5. Pull the PT100 temperature sensor completely up and leave it on GC top place
as shown in Figure 3-5.
Figure 3-5. Oven Temperature Sensor (2)
6. From the main board disconnect the PT100 cable and remove it completely
from the GC top side.
7. Install the new oven temperature sensor proceeding in the reverse order of its
removal.
8. Before placing the new oven sensor in the GC oven, its fixing screw must be
greased with an anti-seize lubricating compound.
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OPERATING SEQUENCES
How to Replace Oven Heater
Perform the oven heater replacement operating as follows:
1. Disconnect the GC rear power cord from the main power line.
2. Remove the GC top and rear covers as described in the operating sequence
How to Remove the Top and Rear Covers on page 43.
3. Remove the small back cover on the rear GC bottom side unscrewing its nut.
See respectively A and B of Figure 3-6.
A
B
A. Back Cover
B. Back Cover Nut
Figure 3-6. Back Cover Removal (2)
4. Unscrew the temperature sensor holder inside the oven.
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5. Pull the PT100 temperature sensor completely up and leave it on GC top
place.
6. Disconnect the oven heater connector and its GND cable from the main board
as shown in Figure 3-7.
Figure 3-7. Main Board Cables Connection (1)
7. If possible, remove the two oven heater wires from the white connector. This
operation permits to pull out the oven heater cables from the small hole
located on the right top corner of the oven.
8. Unscrew the four Allen screws used to fix the oven diaphragm as shown in
Figure 3-8.
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Figure 3-8. Diaphragm Screws
9. Carefully pull out the diaphragm and its heater cable.
10. Before placing the new oven heater in the GC oven, the four screws used to
fix the diaphragm must be greased by using an anti-seize lubricating
compound.
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OPERATING SEQUENCES
How to Replace the Oven Fan
Perform the oven fan replacement operating as follows:
1. Disconnect the GC rear power cord from the main power line.
2. Remove the GC top and rear covers as described in the operating sequence
How to Remove the Top and Rear Covers on page 43.
3. Remove the oven heater from its oven place and leave it in the oven.
4. Unscrew the fan Allen screw and pull the fan out. In case of difficulty, an
extractor should be used.
5. Install the new oven fan in the same place paying attention that 10 mm must
be left between the fan and the back oven wall as shown in Figure 3-9.
A home made “spacer” is suggested to have it available in the engineer’s
tools kit.
Figure 3-9. Correct Oven Fan Position
6. Before tightening, the screw used to fix the new oven fan on the oven motor
shaft must be greased by using an anti-seize lubricating compound.
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OPERATING SEQUENCES
How to Replace the Oven Fan Motor
Perform the oven motor replacement operating as follows:
1. Disconnect the GC rear power cord from the main power line.
2. Remove the GC top and rear covers as described in the operating sequence
How to Remove the Top and Rear Covers on page 43.
3. Remove the small back cover on the rear GC bottom side and the oven heater
as described in How to Replace Oven Heater operating sequence on page 47.
4. Remove the oven fan as described in How to Replace the Oven Fan operating
sequence on page 50.
5. Disconnect the oven motor cable from the GC main board as shown in
Figure 3-10.
Figure 3-10. Main Board Cables Connection (2)
6. Completely remove the four nuts used to fix the oven motor keeping it up.
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7. Pull out the oven fan motor completely.
8. The four nuts used to fix the new oven motor, must not be tighten too much.
They must be 6-7 mm equal cross screwed on their oven screws as shown in
Figure 3-11.
Figure 3-11. Oven Motor Nut Position
9. Reassemble all the parts proceeding in the reverse order of their removal
paying attention to the position of the oven fan as described in How to
Replace the Oven Fan operating sequence on page 50.
10. Before connecting the power cord to the GC, verify the oven motor function
turning it manually. No mechanical noise must be heard.
OPERATING SEQUENCES
How to Replace the Oven Door Switch
Perform the oven door switch replacement operating as follows:
1. Disconnect the GC rear power cord from the main power line.
2. Remove the GC top and rear covers as described in the operating sequence
How to Remove the Top and Rear Covers on page 43.
3. Remove the GC right panel operating as follows and referring to Figure 3-12:
•
52
Unscrew the two screws A located on its internal top side.
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Mechanical Parts Replacement
•
Loose the three screws B located on its external bottom side.
•
Disconnect the GND cable.
Figure 3-12. FOCUS GC Right Panel
4. Disconnect the cable from the switch as shown in Figure 3-13.
Figure 3-13. Door Switch
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5. Unscrew the switch nut paying attention that the new switch MUST BE fixed
in the same position.
Air Flap System
The air flap system has been developed as shown in Figure 3-14. To help the air
flap system movement during its opening/closing phase, a “spring” has been used.
Figure 3-14. Air Flap System
The air flap system will continue to works also without the spring help.
Air Flap Section
This section contains the instruction to replace the air flap parts.
Perform the operations referring to the relevant operating sequences.
54
•
Air flap stepping motor replacement
Refer to How to Replace the Air Flap Stepping Motor on page 55.
•
Air flap spring replacement
Refer to How to Replace Air Flap Spring on page 58.
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OPERATING SEQUENCES
How to Replace the Air Flap Stepping Motor
NOTE
Air flap stepping motor is removable from the top side of the FOCUS™ GC unit.
Perform the air flap stepping motor replacement operating as follows:
1. Disconnect the GC rear power cord from the main power line.
2. Remove the GC top and rear covers as described in the operating sequence
How to Remove the Top and Rear Covers on page 43.
3. Remove the GC left panel operating as follows and referring to Figure 3-15:
•
Unscrew the two screws A located on its internal top side.
•
Loose the three screws B located on its external bottom side.
Figure 3-15. FOCUS GC Left Panel
4. Disconnect the stepping motor cable as shown in Figure 3-16.
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Figure 3-16. Stepping Motor Cable
5. Loose the security dowel as shown in Figure 3-17.
Figure 3-17. Security Dowel
6. Remove the two Allen screws used to fix the stepping motor on its place as
shown in Figure 3-18.
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Figure 3-18. Stepping Motor Screws
7. Pull up the stepping motor.
CAUTION
When the new stepping motor will be installed on the GC, pay attention that the shaft
flat surface of the gear stepping motor, MUST BE positioned in correspondence with
the security dowel as shown in Figure 3-19. It is not important if the stepping motor
is not correctly positioned on its position.
Stepping
Motor
Security
Dowel
Allen
Screws
Figure 3-19. Security Dowel Position
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8. When the security dowel is tightened, manually rotate the stepping motor
assembly up to reach its definitely position.
9. Fix the stepping motor using the two screws.
10. At this time, loose again the security dowel and then tight it again.
11. Fix the security dowel with a drop of glue.
OPERATING SEQUENCES
How to Replace Air Flap Spring
In case of remote possibility that the air flap “spring” should be broken, perform
tits replacement operating as follows:
1. Disconnect the GC rear power cord from the main power line.
2. Remove the GC top and rear covers as described in the operating sequence
How to Remove the Top and Rear Covers on page 43.
3. Remove the left clips pulling it out manually as shown in Figure 3-20.
Figure 3-20. Air Flap Clips
4. Unscrew the Phillips screw that fix the brass bush.
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5. Using a flat-tip screwdriver, pull out the brass bush as shown in Figure 3-21.
Figure 3-21. Brass Bush
6. At this time, bent out the left air flap assy and remove the spring.
7. The new spring must be one full turn (360°) pre-load before to be fixed on its
position.
8. Reassemble the air flap assy proceeding in the reverse order of its removal.
Pneumatic Modules Section
This section contains the instruction to replace the DPFC and Non-DGFC
pneumatic modules.
Perform the operations referring to the relevant operating sequences.
•
DPFC Module replacement
Refer to How to Replace the DPFC Module on page 60.
•
Non-DGFC module replacement
Refer to How to Replace the Non-DGFC Module on page 62.
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OPERATING SEQUENCES
How to Replace the DPFC Module
Perform the DPFC carrier module replacement operating as follows:
1. Cool down the GC at the room temperature.
2. When cooled, switch OFF the GC.
3. Close the carrier gas regulator.
4. Remove the top cover following the procedure in compliance with the GC
Series as described in the operating sequence How to Remove the Top and
Rear Covers on page 43.
5. Remove the inlet tubing A from the DPFC module as shown in Figure 3-22.
A. DPFC Inlet Tubing
B. DPFC Module Fixing Screws
Figure 3-22. DPFC Module Connections
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6. Unscrew the two Allen screws A used to fix the 3-line pre-assembled plate
from the DPFC module as shown in Figure 3-23.
A.3-line Pre-assembled Plate Fixing Screws
B. DPFC Module Fixing Screw
Figure 3-23. DPFC Module
7. Unscrew the three screws B used to fix the DGFC module on the main unit as
shown in Figure 3-22 and Figure 3-23.
8. Disconnect the flat cable from the DPFC module.
9. Remove the DPFC module.
10. Install the new DPFC module proceeding in the reverse order of its removal.
NOTE
The DPFC module of the FOCUS GC is the same used on the TRACE GC Ultra but its
holder has been mechanically updated to be fixed on the FOCUS GC.
Two holes (see B of Figure 3-22) are present instead of one as the TRACE GC Ultra.
In case the DPFC module for TRACE GC Ultra present in your stock should be installed on
the FOCUS GC, a second hole MUST BE performed on its holder to be fixed correctly on
the FOCUS GC.
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OPERATING SEQUENCES
How to Replace the Non-DGFC Module
Perform the non-DGFC detector module replacement operating as follows:
1. Switch OFF the FID flame or the TCD filaments.
2. Cool down the GC at the room temperature.
3. When cooled, switch OFF the GC.
4. Close the detector gases regulators.
5. Remove the top cover following the procedure in compliance with the GC
Series as described in the operating sequence How to Remove the Top and
Rear Covers on page 43.
Replace the Non-DPFC Module for FID
1. Remove the three inlet tubings A from the non-DGFC module as shown in
Figure 3-24.
A. Non-DGFC Inlet Tubings
B. Detector Tubings Fixing Screw
C. Non-DGFC Module Fixing Screws
Figure 3-24. Non-DGFC Module for FID Inlet Connections
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2. From the non-DGFC module, disconnect the three cables identified as Air,
Hydrogen and Make-up as shown in Figure 3-25.
A. Air Cable
B. Hydrogen Cable
C. Make-up Cable
Figure 3-25. Non-DGFC Module for FID Cables Connections
3. From the non-DGFC module, unscrew the Allen screw B used to fix the 3-line
pre-assembled plate as shown in Figure 3-24.
4. Remove the two Allen screws C used to fix the non-DPFC module on the GC
main unit as shown in Figure 3-24.
5. Install the new non-DGFC module proceeding in the reversed order of its
removal.
Replace the Non-DPFC Module for TCD
1. Remove the inlet tubing A from the non-DGFC module as shown in
Figure 3-26 on page 64.
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C
B
A
A. Non-DGFC Inlet Tubing
B. Detector Tubings Fixing Screw
C. Non-DGFC Module Fixing Screw
Figure 3-26. Non-DGFC Module for TCD Inlet Connections
2. From the non-DGFC module, disconnect the two cables identified as
Reference and Make-up as shown in Figure 3-27.
R
M
R. Reference Cable
M. Make-up Cable
Figure 3-27. Non-DGFC Module for TCD Cables Connections
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3. From the non-DGFC module, unscrew the Allen screw B used to fix the 3-line
pre-assembled plate as shown in Figure 3-26.
4. Remove the Allen screw C used to fix the non-DPFC module on the GC main
unit as shown in Figure 3-26.
5. Install the new non-DGFC module proceeding in the reverse order of its
removal.
Injector Section
This section contains the instruction to replace the injector parts. Perform the
operations referring to the relevant operating sequences.
•
S/SL injector assembling replacement
Refer to How to Replace the S/SL or PPKD Injector Assembly on page 65.
•
Injector temperature sensor and heater replacement
Refer to How to Replace the S/SL or PPKD Temperature Sensor and Heater
on page 69.
OPERATING SEQUENCES
How to Replace the S/SL or PPKD Injector Assembly
Perform the injector assembly replacement operating as follows:
1. Cool down the GC at the room temperature. When cooled, switch OFF the
GC.
2. If installed, remove the column from the injector.
3. Remove the top cover following the procedure in compliance with the GC
Series as described in the operating sequence How to Remove the Top and
Rear Covers on page 43.
4. Remove the two Phillips screws used to fix the insulating material cover
shown in Figure 3-28.
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Figure 3-28. Insulating Material Cover
5. Unscrew the two Allen screws used to fix the 3-line pre-assembled plate on
the DPFC module. See A of Figure 3-23 in the How to Replace the DPFC
Module operating sequence on page 60.
6. Remove the insulating material around the injector.
7. Remove the injector septum cap.
8. Remove the screw 1 and the aluminium ring 2 that stops the temperature
sensor and the heater element in the heating block as schematically shown in
Figure 3-29 on page 67.
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1. Screw
2. Aluminium Ring
Figure 3-29. Injector Temperature Sensor and Heater Screw
9. Take out the temperature sensor and the heater from the heating block and
leave them on the top of the GC.
10. Remove the small nut and the small metal cover with the insulator material
inside the oven as shown in Figure 3-30.
Figure 3-30. Nut Inside the Oven
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11. Unscrew the nut of the column adapter (see 1 and 2 of Figure 3-31) and
remove it from the injector.
1. Column Adapter Nut
2. Column Adapter
3. Blocking Nut
Figure 3-31. Column Adapter
12. Unscrew the injector blocking nut (see 3 of Figure 3-31) and pull the injector
out from its housing.
13. Install the new injector proceeding in the reverse order of its removal paying
attention that the “silver seal”, present on the column adapter, must be
changed with a new one having PN 290 026 29.
14. Before placing the temperature sensor and the heater into the injector heating
block, grease them by using an anti-seize lubricating compound.
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OPERATING SEQUENCES
How to Replace the S/SL or PPKD Temperature Sensor and
Heater
Perform the replacement of the injector temperature sensor and heater operating
as follows:
1. Perform the steps from 1 to 9 of the How to Replace the S/SL or PPKD
Injector Assembly operating sequence, on page 65, up to reach the removing
phase of the temperature sensor and heater from heating block.
2. Remove the small back cover on the rear GC bottom side unscrewing its nut.
See respectively A and B of Figure 3-32.
A
B
1. Back Cover
2. Back Cover Nut
Figure 3-32. Back Cover Removal (3)
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3. Disconnect the relative cable (P6 injector heater - P10 injector temperature
sensor) from the MY04 main board, then remove the interested item from the
GC as shown in Figure 3-33.
Figure 3-33. Main Board Cables Connection (3)
4. Before placing the temperature sensor into the injector heating block, grease it
by using an anti-seize lubricating compound.
5. Reassemble all the other parts proceeding in the reverse order of their
removal.
Detector Section
This section contains the instruction to replace the detector parts. Perform the
operations referring to the relevant operating sequences.
70
•
FID Detector assembling replacement
Refer to How to Replace the CB71 Detector Base Body Assembly on page 71.
•
FID temperature sensor and heater replacement
Refer to How to Replace the FID Temperature Sensor and Heater on page 74.
•
TCD assembling replacement
Refer to How to Replace the TCD Detector Assembly on page 76.
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OPERATING SEQUENCES
How to Replace the CB71 Detector Base Body Assembly
Perform the CB71 detector assembly replacement operating as follows:
1. Cool down the GC at the room temperature.
2. When cooled, switch OFF the GC.
3. Close the detector gas regulators.
4. Remove the GC top cover following the procedure in compliance with the GC
Series as described in the operating sequence How to Remove the Top and
Rear Covers on page 43.
5. Remove the column from the base body.
6. Remove the FID detector from the base body.
7. Remove the two Phillips screws used to fix the CB71 detector insulating
material cover as shown in Figure 3-34.
Figure 3-34. Detector Insulating Material Cover
8. Unscrew the Allen screw A used to fix the 2-line pre-assembled plate on the
non-DGFC module as shown in Figure 3-35.
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Figure 3-35. 3-Line Pre-assembled Plate Fixing Screw
9. Remove the capillary column adapter from the capillary detector base body.
10. Remove the detector base body fixing nut inside the oven as shown in
Figure 3-36.
Figure 3-36. Detector Base Body Fixing Nut
11. Remove the base body assembly pulling it up paying attention at the
temperature sensor and heater cables.
12. Loose the relevant fixing screw to remove the temperature sensor and the
heater from the detector heating block as shown in Figure 3-37 on page 73.
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Figure 3-37. Heater-Temperature Sensor Fixing Nut
13. Take out the temperature sensor and the heater from the detector heating
block.
14. Before placing the temperature sensor and the heater into the detector heating
block, grease them by using an anti-seize lubricating compound.
15. Install the new CB71 detector base body proceeding in the reverse order of its
removal.
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OPERATING SEQUENCES
How to Replace the FID Temperature Sensor and Heater
Perform the replacement of the FID temperature sensor and heater operating as
follows:
1. Perform the steps from 1 to 7 of the How to Replace the CB71 Detector Base
Body Assembly operating sequence, on page 71, up to reach the temperature
sensor and heater removing phase from detector base body heating block.
2. Remove the small back cover on the rear GC bottom side unscrewing its nut.
See respectively A and B of Figure 3-38.
A
B
1. Back Cover
2. Back Cover Nut
Figure 3-38. Back Cover Removal (4)
3. Disconnect the relative cable (P7 detector heater - P9 detector temperature
sensor) from the MY04 main board, then remove the interested item from the
GC as shown in Figure 3-39.
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Figure 3-39. Main Board Cables Connection (3)
4. Before placing the temperature sensor and the heater into the detector heating
block, grease them by using an anti-seize lubricating compound.
5. Reassemble all the other parts proceeding in the reverse order of their
removal.
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OPERATING SEQUENCES
How to Replace the TCD Detector Assembly
The TCD detector assembly consists of a properly insulating box containing the
TCD cell as shown in Figure 3-40.
WARNING! The replacement of the TCD cell, temperature sensor and heaters, MUST be
performed only by Thermo Fisher Scientific EXPERT field service engineers.
TCD Detector Assembly with Cover
TCD Detector Assembly without Cover
Figure 3-40. TCD Detector Assembly
Perform the complete TCD detector assembly replacement operating as follows:
1. Cool down the GC at the room temperature.and turn OFF the filaments of the
TCD.
2. When cooled, switch OFF the GC.
3. Close the detector gas regulators.
4. Remove the detector and the GC top covers following the procedure in
compliance with the GC Series as described in the operating sequence How to
Remove the Top and Rear Covers on page 43.
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5. Remove the column and the column adapter, if present, from the detector base
body.
6. Unscrew the Allen screw A used to disconnect the 2-line pre-assembled plate
from the non-DGFC module as shown in Figure 3-41.
A
Figure 3-41. “-Line Pre-assembled Plate Removal)
7. Remove the small back cover on the rear GC bottom side unscrewing its nut.
See respectively A and B of Figure 3-42.
A
B
1. Back Cover
2. Back Cover Nut
Figure 3-42. Back Cover Removal (5)
8. On the MY04 main board disconnect the detector heater and the temperature
sensor cables, respectively from connectors marked P7 and P9, then remove
the interested item from the GC as shown in Figure 3-43.
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Figure 3-43. Main Board Cables Connection (4)
9. On the top of the TCDE 203 box, located on the GC rear, disconnect the
heater and filaments cables respectively from the connectors marked P7 and
P3.
10. Unscrew the four screws that fix the TCD detector assembly to the injector/
detector compartment as shown in Figure 3-44
1
3
1
2
1. TCD Detector Assembly
2. TCD Detector Assembly Fixing Screws
3. Ground Connection
Figure 3-44. TCD Detector Assembly Removal
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11. Disconnect the ground wire, coming from the TCD detector assembly from
the ground connection located on the upper part of the GC behind the injector/
detector compartment. See Figure 3-44.
12. Remove the TCD detector assembly.
13. Install the new TCD detector assembly proceeding in the reverse order of its
removal.
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Electronic Parts Replacements
This paragraph details the instructions to replace the most important electronic
parts of the FOCUS GC.
Introduction
According to GC version refer to:
•
GC with FID
•
GC with TCD
GC with FID
In the GC there are following electronic boards:
1. The main board identified as MY04 is used to control the GC functions.
2. A second small board identified as ELI201 is used to control the FID detector
electrometric functions.
These two boards are located in the lower part of the GC into a dedicated cassette.
The boards must be removed together.
The cassette is removable from the front of the GC unscrewing the screw located
on the rear panel, disconnecting all the cables connected on the main board and
removing the GC LEFT cover panel to have the FID cables free.
In addition to the ELI201 board, another circuit, identified as CVA201
(Electrometer pre-amplifier box) is used to read the signal coming from the FID
detector.
The ELI201 board is fixed on the main board while the CVA201 electrometer preamplifier circuit is positioned on the rear of the GC into a box.
To replace the electronic parts, please refer to the operating sequences reported in
the following sections of this paragraph.
•
80
Electronic Cassette Section on page 81.
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•
NOTE
Electronic Boards Section on page 86.
Read the entire procedures completely to familiarize yourself with the disassembly process
before proceeding.
GC with TCD
In the GC there are the following electronic boards:
1. The main board identified as MY04 is used to control the GC functions.
2. A second board identified as TCDI 203 is used to control the TCD detector
electrometric functions.
These two boards are located in the lower part of the GC into a dedicated cassette.
The boards must be removed together.
The cassette is removable from the front of the GC unscrewing the screw located
on the rear panel, disconnecting all the cables connected on the main board and
removing the GC LEFT cover panel to have the detector cables free.
In addition to the TCDI 203 board, another circuit, identified as TCDE 203 is
used to read the signal coming from the TCD detector.
The TCDI 203 board is fixed on the main board while the TCDE 203 board is
positioned on the rear of the GC into a box.
To replace the electronic parts, please refer to the operating sequences reported in
the following sections of this paragraph.
NOTE
•
Electronic Cassette Section on page 81.
•
Electronic Boards Section on page 86.
Read the entire procedures completely to familiarize yourself with the disassembly process
before proceeding.
Electronic Cassette Section
This section contains the instruction the replace the electronic cassette parts.
Perform the operations referring to the relevant operating sequences.
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•
Complete electronic cassette replacement
Refer to How to Replace the Complete Electronic Main Cassette on page 82.
•
Front panel replacement
Refer to How to Replace the Front Panel on page 85.
OPERATING SEQUENCES
How to Replace the Complete Electronic Main Cassette
Perform the complete electronic main cassette replacement operating as follows:
1. Cool down the GC at the room temperature.
2. When cooled, switch OFF the GC.
3. Disconnect the GC power cord.
4. Remove the top cover following the procedure in compliance with the GC
Series as described in the operating sequence How to Remove the Top and
Rear Covers on page 43.
5. Remove the GC left panel operating as follows and referring to Figure 3-45
on page 83.
82
•
Unscrew the two screws A located on its internal top side
•
Loose the three screws B located on the external bottom side of it and
remove its GND cable.
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Figure 3-45. FOCUS™ GC Left Panel
6. Remove the small back cover on the GC rear bottom side unscrewing its nut.
See respectively A and B of Figure 3-46.
A. Back Cover
B. Back Cover Nut
C. Electronic Main Cassette Fixing Screw
Figure 3-46. Back Covers and Electronic Main Cassette Screw
7. Disconnect all the cables from the main board.
8. Unscrew the Allen screw C fixed on the GC rear side as shown in
Figure 3-46.
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9. In case of FID, remove the excitation/polarization cable from the main unit,
as shown in Figure 3-47, and locate it into the rear electronic main cassette.
From the CVA201 pre-amplifier box disconnect the small flat cable and
locate it into the electronic main cassette too.
Figure 3-47. FID Cables
10. In case of TCD, from the TCDE 203 box disconnect the flat cable and locate
it into the electronic main cassette too.
WARNING! The cables must be located into the electronic main cassette in a way to permit to it
to be easily removed without any obstacle.
11. Carefully pull out completely the electronic main cassette from the front of
the GC.
WARNING! Do not insist to pulling out electronic main cassette if some mechanical obstacles
are encountered.
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OPERATING SEQUENCES
How to Replace the Front Panel
The GC display and its keypad are not available as single spare parts. In case of
troubles on them, the complete Front Panel must be replaced.
Perform the front panel replacement operating as follows:
1. Cool down the GC at the room temperature.
2. When cooled, switch OFF the GC.
3. Disconnect the GC rear power cord from the main power line.
4. Disconnect all the other cables connected to the GC rear panel.
5. Remove the small back cover on the GC rear bottom side unscrewing its nut.
See respectively A and B of Figure 3-48.
1. Back Cover
2. Back Cover Nut
C. Electronic Main Cassette Fixing Screw
Figure 3-48. Back Covers and Electronic Cassette Screw (2)
6. Unscrew the Allen screw C fixed on the GC rear panel as shown in
Figure 3-48. The electronic main cassette will be pulled carefully out for a
few centimeters.
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7. By using a short Phillips screwdriver, remove the five screws A used to fix the
Front Panel of the electronic main cassette as shown in Figure 3-49.
A. Front Panel Fixing Screws
B. Front Panel Cable
Figure 3-49. Front Panel Internal View
8. Remove the front panel flat cable B from the mother board as shown in
Figure 3-49.
Electronic Boards Section
This section contains the instructions the replace the electronic boards.
Three standard electronic equipments are present on the GC.
They are identified as follows:
FOCUS GC with FID
•
MY04 pcb (Main board)
•
ELI201 pcb (FID electrometric board)
•
CVA201pcb (Pre-amplifier box)
FOCUS GC with TCD
86
•
MY04 pcb (Main board)
•
TCDI203 pcb electrometric board)
•
TCDE203 pcb box
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The main MY04 board and the ELI201 or TCDI203 boards CAN NOT BE
removed individually. Both are located in the electronic main cassette.
Perform the operations referring to the relevant operating sequences.
•
MY04 and electrometric boards replacement
Refer to How to Replace MY04 and Electrometric Boards on page 87.
•
CVA201 replacement
Refer to How to Replace The CVA201 Pre-amplifier Box on page 88.
•
TCDE203 box replacement
Refer to How to Replace The TCDE203 Box on page 89
OPERATING SEQUENCES
How to Replace MY04 and Electrometric Boards
Perform the MY04 and ELI201 or TCDI203 boards replacement operating as
follows:
Before starting, remove completely the electronic main cassette as described in
How to Replace the Complete Electronic Main Cassette operating sequence.
Electrometric Board Replacement
1. No screws are used to fix the ELI201 or TCDI203 on the MY04 main board.
2. The electrometer board is connected to the main board through the connector
marked P30. Remove the board pulling it out manually from its connector.
MY04 Main Board Replacement
Referring to Figure 3-50, operate as follows.
1. Disconnect the Front Panel cable from the connector P28.
2. Remove the Time Events cable from the connector P18.
3. Remove the four RS232 connector’s screws from the MY04 board holder.
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4. Remove the twelve screws, marked as red bullets in 3-50, used to fix the
main board on its bracket.
Figure 3-50. MY04 Main Board
OPERATING SEQUENCES
How to Replace The CVA201 Pre-amplifier Box
Perform the CVA201 Pre-amplifier box replacement operating as follows:
1. Set OFF the FID flame and cool down the GC.
2. When cooled, switch OFF the GC and remove its power cord.
3. Remove the GC rear cover as described in Chapter 2 of this manual.
4. Remove also the GC left cover panel removing the two screws located on the
top of the GC and unscrewing the three screws located on the bottom side of
the left panel (see Figure 3-15 on page 55).
5. From the FID detector cell disconnect the detector signal cable coming from
the CVA201 box.
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6. From the CVA201 box disconnect the small flat cable coming from the
ELI201 board.
7. Remove the CVA201 box from its holder clips.
OPERATING SEQUENCES
How to Replace The TCDE203 Box
Perform the TCDE203 box replacement operating as follows:
1. Set OFF the TCD filaments and cool down the GC.
2. When cooled, switch OFF the GC and remove its power cord.
3. Remove the GC rear cover as described in Chapter 2 of this manual.
4. Remove also the GC left cover panel removing the two screws located on the
top of the GC and unscrewing the three screws located on the bottom side of
the left panel (see Figure 3-15 on page 55).
5. On the top of the TCDE203 box, disconnect the heater and filaments cables
coming from the TCD detector assembly.
6. On the bottom of the TCDE203 box disconnect the flat cable coming from the
TCDI203 board, the 48 Vac and the GND cables.
7. Remove the TCDE203 box undoing the two screws that fix it to the upper part
of the GC as shown in Figure 3-51 on page 90.
Extract the box from the back of the GC pay attention to the duct for
screwdriver.
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2
1 Box Fixing Screws
1
2. Duct for Screwdriver
Figure 3-51. TCDE203 Box
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Description
4
This chapter contains a detailed description of the electronic boards of the
FOCUS™ GC.
Chapter at a Glance…
General Description..............................................................................................92
Electronic Main Cassette......................................................................................94
Main Schematic Diagrams ...................................................................................96
Introduction to MY04 Main Board.......................................................................97
Connectors Dismounting on Main MY04 Board ...............................................106
MY04 Main Board Sections Description ...........................................................108
ELI201 Electrometric Board (FID) .................................................................... 113
CVA201 Electrometer Pre-amplifier Board (FID) ............................................. 115
TCDI203 Electrometric Board (TCD)................................................................ 116
TCDE203 Board (TCD) ..................................................................................... 117
FRTMY100 Board and Keypad.......................................................................... 118
IFM311 LAN Option.......................................................................................... 119
Operating Sequences
How to Dismounting the Connectors .................................................................106
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General Description
General Description
The FOCUS™ GC is subdivided in five main compartments:
•
Oven
•
Injector/Detector
•
Digital Pressure Flow Control (DPFC) for carrier gas
•
Manual Flow Control (Non-DGFC) for detector gases
•
Electronic Main Cassette
The following parts are located in the Oven compartment:
•
Oven fan
•
Oven motor
•
Oven heater
•
Oven temperature sensor
The following parts are located in the injector/detector compartment according to
the GC configuration:
•
One split-splitless (S/SL) injector or purged packed column injector (PPKD)
•
One base-body for FID detector or TCD detector assembly
•
Heater cartridges
•
PT100Temperature sensors
The following parts are located in the DPFC and non-DGFC compartment present
on the upper parts of the GC rear side:
•
One DPFC pneumatic module for the digital carrier gas control
•
One non-DGFC conventional pneumatic module for the detector gases
control
The following parts are located in the electronic main cassette
•
92
The main board which contains the following parts:
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General Description
— Main input voltage components (breaker, filter, fuses and others
— Rear connectors
— earth connections
— power supply
— SSR devices
— digital/analogical
— microprocessors
NOTE
Refer to the FOCUS GC Spare Parts Catalog for the available spare parts
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Electronic Main Cassette
Electronic Main Cassette
The primary requirement for any FOCUS™ GC is to have multiple independent
temperature controlled zones. In addition, various input and output signals are
needed for synchronization and control of peripheral devices as heaters,
temperature sensors, solenoid valves, AC motor, stepping motor and electrical
switch.
In the GC, all functions are controlled by two microprocessors present in the Main
Board of the Main Cassette located under the GC Oven.
Figures 4-1 and 4-2 show a generalized block diagrams of the GC with FID and
TCD respectively.
RS 232 (PC)
MAIN
C.P.U.
RS 232 (AS)
Timed Events
Handshake/Sampler
Power
Supply
Valve
Drivers
+5 Vdc ; +/- 15 Vdc
24 Vdc Valves
ELI201
Electrometric Board
DPFC Module
DPFC +
A/D + D/A.
H2 Sensor
Oven Flap Stepping Motor
Heater
Drivers
Temp.
Control
Heaters (230/120 Vac)
Oven Door Switch
Temperature Sensor
CVA 210
Electrometer
Pre-amplifier
FID Detector
Analogical Output Voltages
Figure 4-1. FOCUS™ GC with FID Main Board Block Diagram
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RS 232 (PC)
MAIN
C.P.U.
RS 232 (AS)
Timed Events
Handshake/Sampler
Power
Supply
Valve
Drivers
+5 Vdc ; +/- 15 Vdc
24 Vdc Valves
TCDI203
Electrometer Board
DPFC +
A/D + D/A.
Heater
Drivers
Heaters (230/120 Vac)
Oven Door Switch
TCDE203 Box
DPFC Module
H2 Sensor
Oven Flap Stepping Motor
Temp.
Control
Temperature Sensor
TCD
Detector
Analogical Output Voltages
Figure 4-2. FOCUS™ GC with TCD Main Board Block Diagram
The Main Board is divided in six main functions named:
•
Power Supply
•
Main Central Processor Unit CPU
•
Analog/Digital & DPFC
•
Temperature Controller
•
Heater Drivers
•
Valve drivers
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Main Schematic Diagrams
Main Schematic Diagrams
The schematics and component layout information is listed below in Table. The
number of drawings has been included for each schematic and its corresponding
layout. The wiring diagram and the block diagram shown you all internal cables
and connectors used to connect all heaters, temperature sensors, boards, motors
and transformers.
Table 4-1. Main Schematic Diagrams
FOCUS GC Configuration
96
Schematic
Diagram
Layout
Wiring
Diagram
With FID detector
SE 1529
SC 817
SC 818
With TCD detector
SE 1528
SC 819
SC 820
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Electronic Boards Description
Introduction to MY04 Main Board
Introduction to MY04 Main Board
This board provides the platform for communication between many of the other
PCB’s functions of the main board of the FOCUS™ GC and the external devices.
1
1. MY04 Main Board
2. Transformer (+ 5V; 700 mA)
3. Transformer (±15 V; 900 mA)
4. Transformer (+24 V; 500 mA)
5. Eprom
6. Reset Button
7. RS232 Connectors
8. Detector Board Connector (NOT USED)
9. Microprocessor
10. Time Events Connectors
11. DPFC CPU Section
12. Main CPU Section
13. DPFC Connector
14. Back-up Battery
Figure 4-3. MY04 Main Board
The following tables list the protection fuses and the connectors present on the
MY04 Main Board.
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Table 4-2. Fuses
Fuses
F1 - F3
F2
F4 - F5
Description
Injector/Detector heaters
Transformers (on primary coils)
Oven motor
Table 4-3. Connectors
Connectors
Description
P2
120V Voltage Selector
P3
230V Voltage Selector
P4
Fan Motor
P6
Injector Heater
P7
Detector Heater
The above individual Receptacle Pod connectors are collected in a single Receptacle Shroud
connector to be easily removed. In case an individual Receptacle Pod connector should be
removed, please refer to the Connectors dismounting on Main MY04 Electronic board.
P5
Oven Heater
P8
Oven Temperature Sensor
P9
Detector Temperature Sensor
P10
Injector Temperature Sensor
P19
Door Switch
P20
Flap Stepping Motor
The above individual Receptacle Pod connectors are collected in a single Receptacle Shroud
connector to be easily removed. In case an individual Receptacle Pod connector should be
removed, please refer to the Connectors dismounting on Main MY04 Electronic board.
98
P13 - P14
Split Purge Valves
P15 ÷ P17
Manual Detector Module
P24
DPFC Connection
P27
Free Connector for future expansion
P30
FID/TCD (ELI201/TCDI203) Board Connector
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Power Supply Notes
This board has been developed to operate without any electronic modification
with 120V or 230V main power line. Only the P2 and P3 connectors must be
positioned/connected on the main board in accordance with the main power line
value. The Injector, Detector and Oven heaters, the Oven Fan motor (with its
capacitor) and the Main Power Switch are factory set in accordance with the
FOCUS™ GC voltage required.
General Notes
The main board is divided in CPU, power and buffer sections.
The CPU section is divided in two subsections where the main controls all the GC
functions and the second controls the DPFC module function.
The two subsections are always in communication between them.
The temperature control for injector, detector base body and GC oven use the
temperature sensors (PT100) as feedback elements. All of these signals are routed
through the temperature controller section.
The main board has:
•
A 32+32 pins “Piggy Back” connector to accept the electrometer board.
•
Five connectors positioned to provide control signals to external peripherals
via the rear panel of the GC.
These connectors are:
— Time Event
— Generic Handshake
— Sampler Signal
— RS 232 - Autosampler
— RS 232 - Computer
Timed Event Connector
The following Figure 4-4 shows the Timed Events connector (P18, 15 D-pin
Female) which provides generic timed control signals.
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Figure 4-4. Front View of Timed Event Connector
Individual pin assignments for the Timed Event connector, and associated control
signals and electrical characteristics, are indicated in Table 4-4.
Table 4-4. Timed Event Connector
100
Pin Number
Signal
Electrical Characteristics
1
Aux 1-vlv
Output Driver (direct) 24 V, 1 W Max
2
Aux 1-vlv
Output Driver (direct) 24 V, 1 W Max
3
Aux 2-vlv
Output Driver (direct) 24 V, 1 W Max
4
Aux 2-vlv
Output Driver (direct) 24 V, 1 W Max
5
Sense H2
Input Pull-up 5 Vdc (for Open Collector
Output)
9
PH0
Open Collector, 24 V Max, 15 mA Current Sink
10
PH2
Open Collector, 24 V Max, 15 mA Current Sink
11
PH4
Open Collector, 24 V Max, 15 mA Current Sink
12
PH8
Open Collector, 24 V Max, 15 mA Current Sink
6,7,8,13,14,15
GND
Ground
•
Two power Auxiliary signals are available to control two solenoid valves
directly.
•
The “Sense H2” is an inlet signal coming from the Hydrogen Sensor Device
when installed.
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Introduction to MY04 Main Board
•
The four Open Collector signals allows to recognize the GC status phases.
The signals are present in hexadecimal code.
The Code/Phase are reported in the Table 4-5.
— In the GC there are seven selectable RAMPS (°C/min) and eight
selectable ISOTHERMS (temp./time).
Their will be named as INITIAL, MIDDLE and FINAL.:
Table 4-5. Code-Phases
Code
Phase
Code
Phase
0
Not Ready
8
Middle Rate
1
ST/BY
9
Not Used
2
Ready to Inject
10
Middle Iso
3
Not Used
11
Final Rate
4
Initial Iso
12
Not Used
5
Initial Rate
13
Final Iso
0
Not Ready
8
Middle Rate
1
ST/BY
9
Not Used
Generic Handshake Connector
Figure 4-5 shows the Generic Handshake connector (P21, MINIDIN 8-Pin
Female Circular), which provides generic handshake input/output control signals.
.
Figure 4-5. Front View of Generic Handshake Connector
Individual pin assignments for the Generic Handshake connector, and associated
control signals and electrical characteristics, are indicated Table 4-6.
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Table 4-6. Generic Handshake Connector
Pin
Number
Electrical
Characteristics
Signal
1
Remote Start—This signal is an input to the
GC to start the program temperature. Polarity
is software selectable.
TTL Input
2
Inhibit Ready—This signal is an input to the
GC to indicate that the GC is not ready to start
a run. Polarity is software selectable.
TTL Input
3
Ground
4
Start Run—This signal is an output from the
GC to indicate external devices that a run has
started. Polarity is software selectable.
Open Collector, 24 V
Max, 15 mA Output
Current Sink
5
Ready Out—This signal is an output from the
GC to indicate external devices that the GC is
ready to start a run. Polarity is software
selectable.
Open Collector, 24 V
Max, 15 mA Output
Current Sink
6
End Run—This signal is an output from the
GC to indicate external devices that the GC
run has ended. Polarity is software selectable.
Open Collector, 24 V
Max, 15 mA Output
Current Sink
7
Prep Run—This signal is an output from the
GC to signal external devices that the GC is in
the Prep Run condition. Polarity is software
selectable.
Open Collector, 24 V
Max, 15 mA Output
Current Sink
8
Not Used
N/A
---
Sampler Signal Connector
Figure 4-6 shows the Sampler Signal connector (P22, MINIDIN 6-Pin Female
Circular), which provides autosampler input/output control signals
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.
Figure 4-6. Front View of Sampler Signal Connector
Individual pin assignments for the Sampler Signal connector, and associated
control signals and electrical drive capabilities, are indicated in Table 4-7.
Table 4-7. Autosampler Connector
Pin
Number
Signal
Electrical Drive
Capability
1
Remote Start—This signal is an input to the GC
to indicate that the run should start. Polarity is
software selectable.
TTL Input
2
Inhibit Ready—This signal is an input to the GC
to indicate that the GC should not go Ready.
Polarity is software selectable.
TTL Input
3
Ground
4
Start Run—This signal is an output from the GC
to indicate external devices that a run has started.
Polarity is software selectable.
Open Collector, 20
V Max, 150 mA
Current Sink
5
Ready Out—This signal is an output from the GC
to signal external devices that the GC is Ready to
start a run. Polarity is software selectable.
Open Collector, 20
V Max, 150 mA
Current Sink
6
Not Used
N/A
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Autosampler Connector
Figure 4-7 shows the Autosampler connector (P23, MINIDIN 9-Pin Female
Standard), which provides the RS 232 serial line communication signals to/from
the autosampler.
1
5
9
6
Figure 4-7. Autosampler Connector
Individual pin assignments for the Autosampler connector, and associated control
signals and electrical characteristics, are indicated Table 4-8.
Table 4-8. Autosampler Connector
Pin Number
Signal
Electrical Characteristics
2
TXD
Transmitted Data
3
RXD
Received Data
4
DTR
Data Terminal Ready
5
GND
Ground
8
CTS
Clear To Send
Computer Connector
Figure 4-8 shows the Computer connector (P29, MINIDIN 9-Pin Female
Standard), which provides the RS 232 serial line communication signals to/from
the computer.
1
5
9
6
Figure 4-8. Computer Connector
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Individual pin assignments for the Autosampler connector, and associated control
signals and electrical characteristics, are indicated Table 4-9.
Table 4-9. Computer Connector
Pin Number
Signal
Electrical Characteristics
2
TXD
Transmitted Data
3
RXD
Received Data
4
DTR
Data Terminal Ready
5
GND
Ground
8
CTS
Clear To Send
Other connectors provide inter chassis power distribution and communication.
These connectors are itemized in Table 4-10.
Table 4-10. Other Connectors
Connector
P28
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Connectors Dismounting on Main MY04 Board
Connectors Dismounting on Main MY04 Board
To simplify the connections/disconnections on the MY04 board of some
connectors, they have been placed in a single Receptacle connector.
OPERATING SEQUENCES
How to Dismounting the Connectors
In case it is necessary to take out the individual small Receptacle Pod connector
from the single main Receptacle connector, operate as follows:
1. Disconnect the FOCUS GC rear power cord from the main power line.
A
B
1. Back Cover
2. Back Cover Nut
Figure 4-9. Back Cover
2. Remove the GC top cover and/or the rear covers as described in the operating
sequence How to Remove the Top and Rear Covers on page 43.
3. Remove the small back cover on the rear GC bottom side (see A of
Figure 4-9), unscrewing its blocking nut (see B of Figure 4-9).
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Connectors Dismounting on Main MY04 Board
4. Take out the interested receptacle connector pressing the two lateral sides
and then pulling out it as shown in Figure 4-10.
A. Lateral Side
B. Bottom View
Figure 4-10. Receptacle Shroud
5. To remove a receptacle pod, shown in Figure 4-11, from its receptacle
connector, use a small screwdriver to lift the respective receptacle pod notch,
then pull out it.
Receptacle Pod
Pod Notch
Figure 4-11. Receptacle Pod
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MY04 Main Board Sections Description
MY04 Main Board Sections Description
This paragraph provides the description of the main section of the MY04 main
board.
Schematics and Component Layout
The schematics and component layout information for the MY04 board is listed
below in Table 4-11. The number of drawings has been included for each
schematic and its corresponding layout.
Table 4-11. MY04 Main Board Schematics
Board
MY04
PN
Drawing
Layout
236 485 17
SE 1526 (1/7)
PC 1206
Sheet 1/7 (CPU 1)
The CPU PCB provides the control for all functions of the FOCUS™ GC.
The main 8 bits microprocessor is ZILOG Z180 (U52) having internally:
•
One megabyte of address memory
•
Two RS232
•
One SPI (Serial Peripheral Interface)
•
Three Timers
There are two types of memories selected by 74HC00 (U46):
•
Flash memory (embedded firmware), 128 kilobyte (U51)
•
Static memory, 128 kilobyte (U53)
The oscillation frequency is of 12,288 MHz generated from Quartz (Y2) and then
it is divided for two by Microprocessor.
The integrated circuit MAX705 (U71) generates the RESET logic following the
+5Vdc.
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The FRAM 25C160-S (U69) is used for “store configuration” loading memory
only.
A real time clock circuit (used for time and date) and interrupt are generated from
DS1305E (U73) which is supplied also by a 3.6 V backup battery (BAT1).
The oscillation frequency is of 32.768 kHz generated from Quartz Y3.
Two Is MAX232CPE (U58-U59) drive two serial communication outputs
(PC-AS) and the LAN module interface IFM 311. The chips selected are buffered
by ICs 74HC377 (U54-U57) and 74HC245 (U65).
Sheet 2 (CPU2)
The FID connector marked P30 is used for the electrometer board ELI201 or
TCDI203, incorporated in the GC, which are respectively connected to:
•
the pre-amplifier module CVA201 and then to the FID detector cell.
•
the TCDE203 box and then to the TCD detector cell
Two ICs 74HC590 (U61-U60) read the 0-3.5 MHz input frequency (baseline
signal) generated from the detector card (FREQ).
The TERMINAL BLOCK (ANALOG OUT) provide the analogical output voltages
(0-1V; 0-10V) for an external connection to Integrator or Recorder.
Two ICs 74HC160 (U62) and 74HC4020 (U67) are the counter circuit with 1/300
sec. (f = 300 Hz) of scansion. A dedicated interrupt circuit (INT0) is designed by
ICs 74HC74 (U45).
The display and keyboard panel is connected to main board through the P28
connector (DISPLAY CONN.). The output signals present on rear panel connector
(e.g.: Generic Handshake, Time Events, etc…) are generated by two ICs LM339
(U55-U56) as “open collector” signals.
The integrated circuits 74HC4020 (U67), 74HC126 (U63) and BC337 (Q11)
control the Buzzer device (BZ1).
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Sheet 3 (DPFC1)
The single-chip 8 bits microprocessor MOTOROLA 68HC11 (U25), supplied
from 8 MHz oscillator (Y1), controls:
•
The Analog/Digital circuit (U28, DG508A) used for Digital Pressure Flow
Control (DPFC for carrier gas)
•
The Analogic/Digital circuit (U23, DG508A) used for temperature controls
(Oven, Detector Base Body and Injector)
Two ICs 74HC244 (U16-U17) read all inputs (high temp/low limits, H2 sensor,
etc.) which could be generated the “safety cut off “on the GC (alarm status).
The circuit with 74HC00 (U30) and 74HC139 (U36) provides three chip-selects
(WR1, BOOT, RAM) to able the 128 Kilobytes RAM Memory (U21, 62C1024Q)
and EPROM (U18, 27C512) which is a bootstrap firmware for the 68HC11 (U25)
microprocessor (U25).
Sheet 4 (DPFC2)
The ambient temperature reading circuit is realized through
•
TL084C operational amplifier (U37)
•
OP200GP operational amplifier
•
IC AD7715 (U38).
The +15 Vdc is generated by the 78L05 voltage regulator (Q15) supplied to
+5 Vdc.
There are three identical circuits (U42, U41, U40, U39, U44, U43) to provide:
•
Three analogical set-point signals (10 mV/°K; 0V @-273 °C; 6.730 V @
400°C) for three temperature control zones (OVEN, INJECTOR, DET BASE
BODY).
The drawing of Figure 4-12 shows the principle of the thermoregulation of three
temperature zones controlled by microprocessor technologies.
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Figure 4-12. Thermoregulation Principle
Sheet 5 (Power Supply; Valves; Stepper Drivers)
This is the power supply section which provides the following voltages to all other
blocks:
•
+5 Vdc @ 800 mA (CPU; DPFC; TEMP.CNTR; REF; KEYB; DISPLAY)
•
+15 Vdc @ 400 mA (DPFC)
•
-15 Vdc @ 100 mA (DPFC)
•
+12 Vdc @ 4.5 W (FLAP STEPPING MOTORS).
•
+24 Vdc @ 4 W (FID DET)
•
+8 Vdc @ 16 W (FID COIL IGNITER).
There are three transformers (TR1, TR2, TR3) and three diode components
(D1,D2, D3) before the six voltage regulators (Q4, Q12, Q5, Q13, Q6, Q14) to
generate all above voltages which are “under voltage protection” control by
CE9250 (U10; hybrid circuit).
According to the GC configuration, the primary of the dedicated thoroidal
transformer for the FID or TCD supply is connected through P11 connector (pins
4, 5, 9, 10). Only in the case of FID, the secondary of the thoroidal transformer is
also connected through P11 connector (pins 1, 6).
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The stepping motor (four phases, 3600 steps per revolution) for the modulating
oven flap system is supplied by IC ULN2003A driver (U74). The +5Vdc is
monitored by LED I1.
Sheet 6 (Oven; Zone Heaters; Drivers)
There are four SSR 6001 solid-state relay circuits (SSR1, SSR2, SSR3, SSR4)
and three triacs (Q1 BTA26-600B and Q2, Q3 BTA06-600B) to control three
heaters:
•
OVEN HEATER (1000 W)
•
INJECTOR (100 W)
•
DET BASE BODY (100 W)
•
one OVEN FAN MOTOR (25 W)
The main board can be configured for 230 Vac or 120 Vac main input voltage by
placing a different position of the connectors P3 and P2.
Two F-2A fuses (F1, F3) protect the OVEN HEATER and DET HEATER, the fuses F-1.25A (F4) and F-1.25A (F5) protect the OVEN FAN MOTOR, while the fuse
T-1.6A (F2) protects the transformer input.
Two relays MZP-A001-4716 (K1, K2) switch off the main power voltage (230 or
120 Vac) to the heaters and fan motor when a “safety cut off” (alarm status) is
activated by SCOFR safety circuit with BC337 (Q9) and diodes (D14, D15).
The main inlet power voltage (230 or 120Vac) enter in the P1 connector (N, L,
EARTH) by 10A POWER BREAKER and MAIN INPUT SOCKET with internal filter.
Sheet 7 (Oven; Zone Thermoregulators)
There are three identical circuits to control the reading temperature (ACTUAL
TEMP VALUE) of three zones (OVEN, INJECTOR, DET BASE BODY) realized
through:
112
•
Three temperature sensors inputs (P8, P9, P10-called PT100 or RTD)
•
Three ICs CE9903 (U1, U2, U3 hybrid circuits)
•
Three ICs CE9902 (U4,U5, U6)
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ELI201 Electrometric Board (FID)
The switch of the OVEN DOOR is connected to P19 connector, then the circuit with
R83 and BAS16 diode (D11) give the status of the oven door (open or close) to
able or disable the driving of heaters and motors.
ELI201 Electrometric Board (FID)
This paragraph provides the description of the ELI201 electrometer board.
Schematics and Component Layout
The schematics and component layout information for the ELI201 board is listed
below in Table 4-12. The number of drawings has been included for each
schematic and its corresponding layout.
Table 4-12. ELI210 Electrometer Board Schematics
Board
ELI201
PN
Drawing
Layout
236 485 25
SE 1467 (1/2)
PC 1166
Board Description
The main purpose of this board is to control the following parameters of the FID
detector through a small electrometer pre-amplifier circuit marked CVA201.
Refer to CVA201 Electrometer Pre-amplifier Board (FID).
•
IGNIT (flame igniter coil, about 2.0 A @ 8 Vac)
•
-300 V (flame jet polarization)
•
INPUT (low current produced)
Electrometer board takes all digital inputs/outputs (SPI) and the power voltages
(+5Vdc, ±15Vdc, +24Vdc) from the MY04 main board through P1 connector
(32+32 pins, male). See also P30 connector on the MY04 main board.
IMPORTANT
The board requires the use of the assy cable FC 1399 having P/N 230 435 12.
Refer to FC 1399 and SC 818.
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ELI201 Electrometric Board (FID)
Sheet 1/2 (SP1; V/F; Power Supply)
The serial communication lines (MOSI, MISO, CS, CLK) enter to IC 74HC240
(U16) which outputs (SCK, ACK, SIS) are isolated through three 6N137
(U17,U18,U19).
The IC VFC110 (U21) converts the analogical voltage input (VIN, 0-10V)
produced from FID detector through CVA pre-amplifier board to generate the
output frequency (FOUT, from 0 to 3.5 MHz) which be read from
microprocessor.
The hybrid circuit CE9910 (U1) is supplied with ±15 Vdc to produce the –300 V
output voltage for polarizing the FID detector.
The igniter coil of FID detector is supplied to 8 Vac @ 2 A through a K1 relay
which is driven from one BC327 (Q1) and BC546 (Q2) selected by two
microprocessor signal (04, 05) of the IC 74HC595 (U6).
The circuit realized by TL1021 (U26), hybrid circuit CE9557 (U22) and three
voltage regulators LM7805 (U25), LM317 (U23) and LM337 (U24) is a
stabilized power supply for ±15Vdc.
SE 1467 Sheet 2/2 (Auto zero; Gain; Range)
The amplifier OPA177 (U14) receives the input current from FID detector (INA,
CVA) and the “auto zero” input current:
•
IOUT
•
RV1
•
R32
Two ICs 74HC595 (U6, U9) receive the digital inputs from microprocessor (16
bits) to generate the auto zero current:
•
FINE by DAC08, U11
•
GROSS by DAC08, U8).
The circuit with ICs 74HC595 (U6), 74HC138 (U5) and LM324 (U15) select the
range of electrometer (2 bits/4 range: 10°; 0,1,2,3,4) and the analogical filter (N3).
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CVA201 Electrometer Pre-amplifier Board (FID)
The amplifiers OP07 (U3), LM358 (U4) and DG413 (U10) select the “gain” of
the frequency:
•
L = gain 1
• H = gain 32
The analogical outputs (1 V, 10 V) for external integrator are generated from
OP177 (U13), C8, C9, R35, R36, R38 and R39.
CVA201 Electrometer Pre-amplifier Board (FID)
This paragraph provides the description of the electrometer pre-amplifier board.
Schematics and Component Layout
The schematics and component layout information for the CVA201 board is listed
below in Table 4-13. The number of drawings has been included for each
schematic and its corresponding layout.
Table 4-13. CVA201 Pre-amplifier Board Schematics
Board
CVA201
PN
Drawing
Layout
236 485 70
SE 1462 (1/1)
PC 1162
Board Description
The “low current” signal (1 pA/10 mV; DET CABLE, SHIELD) produced from
the FID detector is connected to the input board (G1) by a dedicated cable with
coaxial connector, which goes to the DUAL-FET amplifier (U2) and operational
amplifier OP07 (U1).
Four ICs PN411 FET (Q1, Q2, Q3, Q4) are selected by the three “range” signals
(S1, S2, S3; input current points G2) and N3 signal for analog filter through four
100 kΩ resistances and four BRY73 diodes. Then, the output voltage is available
on pin 7 of P1 (VOUT).
NOTE
In order to verify the FID “electrometer noise level” it is necessary to make the following
technical procedure:
1. Remove the coaxial connectors of the signal cable from FID detector
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TCDI203 Electrometric Board (TCD)
2. Wrap up the coaxial connectors using aluminum paper
3. Connect the analog output signal (0-1V) to the integrator
4. Set parameters ATT=0 and RNG=0 (max sensitivity)
5. The noise level must be within 1% of full scale
TCDI203 Electrometric Board (TCD)
This paragraph provides the description of the TCDI203 board.
Schematics and Component Layout
The schematics and component layout information for the TCDI203 board is
listed below in Table 4-14. The number of drawings has been included for each
schematic and its corresponding layout.
Table 4-14. TCDI203 Electrometric Board Schematics
Board
TCDI203
PN
Drawing
Layout
236 487 65
SE 1522 (1/3)
PC 1204
Board Description
This board controls the SPI internal serial communication interface with MY04
main board, the analogical output signals (0V, 1V, 10V, GND), set functions and
A/D converter. See P30 connector on the MY04 main board.
Sheet 1/3
The integrated circuits U29A-B, U19, U20, U21 and U1A compose the section for
SPI serial bus communication and optical-coupler interface with MY04 main
board signals.
Two ICs U30 and U1F is a circuit to read and control the PRESSURE SWITCH
for the presence of carrier gas, while U1B-E are for internal buffer signals.
The PLC U8 is a microprocessor controlled by internal clock of 1.8432MHz
through OSC1.
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TCDE203 Board (TCD)
Sheet 2/3
In this section of board there four DAC circuits: U27/U28 for auto-zero, U5/U3
for set temperature filament, U4/U2 for set voltage and U17/U19A for set
temperature cell.
U6 with all resistors and capacitors is the ADC converter circuit for temperature
cell.
Sheet 2/3
The IC U11/U18B/U14/U15 is a circuit for GF (gain/frequency) selection of TCD
detector, while the U12/U13/U16/U31A/U31B/U24 is a circuit for TCD
analogical signal and offset.
The U25 and U26 is a V/F converter circuit to generate a FOUT.
TCDE203 Board (TCD)
This paragraph provides the description of the TCDE203 board.
Schematics and Component Layout
The schematics and component layout information for the TCDE203 board is
listed below in Table 4-15. The number of drawings has been included for each
schematic and its corresponding layout.
Table 4-15. TCDE203 Board Schematics
Board
TCDE203
PN
Drawing
Layout
236 487 70
SE 1523 (1/4)
PC 1205
Board Description
This board supplies the TCD cell and controls signals and temperatures.
Sheet 1/4
The IC U5 and U2 constitute the TCD amplifier, while U6 circuit is for
AUTOZERO. The U8A/B and U4 constitute the bridge sensing circuit.
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FRTMY100 Board and Keypad
Sheet 2/4
The IC U13 and U15 is the bridge forcing circuit and supply, while U9A is for ON
Filament circuit. U14 and Q2 are for sensing bridge amplifier.
Sheet 3/4
The CR2, L2, U22 and Q3 is power supply circuit for +/-15VDC, while U24 and
U25A is for +/- 10Vdc voltage.
Sheet 4/4
The 48 Vdc is entering through F2 fuse and K1 relay to CR1 diode and U1 as
power to heater.
The PT100 temperature sensor is read from U2. U19, TE1 and U20 constitute the
thermoregulation circuit, while U11, U7 and RV2 is for synchronize the main
voltage.
FRTMY100 Board and Keypad
This paragraph provides the description of the Front Panel and the Keypad.
Schematics and Component Layout
The schematics and component layout information for the FRTMY 100 board is
listed below in Table 4-16. The number of drawings has been included for each
schematic and its corresponding layout.
Table 4-16. FRTMY100 Board Schematics
Board
FRMTY100
PN
Drawing
Layout
236 485 16
SE 1465 (1/1)
PC 1164
Board Description
The front panel of the GC is very simple with few components and controlled by
the MY04 main board through P28 and P33 connectors.
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Chapter 4
Electronic Boards Description
IFM311 LAN Option
There are:
•
Nine keys (from S1 to S9)
•
Four LEDS (I1, I2, I3, I4)
•
One LCD Display (2 lines x 20 characters) under control of P28 connector on
MY04 main board
IFM311 LAN Option
The LAN option allows the control of the GC. This option is available only for
GCs equipped with the MY04 Main Board.
Schematics and Component Layout
The schematics and component layout information for the IFM311 LAN option is
listed below in Table 4-17. The number of drawings has been included for each
schematic and its corresponding layout.
Table 4-17. IFM3111 LAN Option Schematics
Board
LAN Option
Thermo Scientific FOCUS GC - Service Manual
PN
Drawing
Layout
432 102 15
SE 1527 (1/1)
PC 1207
119
Chapter 4
Electronic Boards Description
120
IFM311 LAN Option
Thermo Scientific FOCUS GC - Service Manual
Maintenance and
Troubleshooting Notes
5
This chapter contains the guides to maintain the S/SL injector and the FID
detector, then analytical and technical troubleshooting notes.
Chapter at a Glance…
Maintenance .......................................................................................................122
Maintenance References.....................................................................................124
Analytical Troubleshooting Notes......................................................................126
Technical Troubleshooting Notes .......................................................................130
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Chapter 5
Maintenance and Troubleshooting Notes
Maintenance
Maintenance
This paragraph provides information on the maintenance of the instrument. It also
contains the instructions for the instrument shutdown.
Suggested Maintenance Schedule
Preventive maintenance keeps your instruments running at peak performance.
The recommended maintenance schedule is based on a GC running multiple
samples in an 8-hour day.
You may need to adapt the schedule to your situation depending on:
•
The number of analyses per day
•
How clean the samples are
•
The condition of the syringe needle
•
Environmental conditions such as dirt and ambient temperature
Septa degrade over time. Different types will degrade at varying rates. Factors
affecting septa life include:
•
Number of samples injected
•
Injector temperature
•
Condition of the syringe needle
Our recommendations for septa replacement are based on 200 injections in a
Thermo Fisher Scientific standard septum. Septa from other manufacturers may
show different rates of degradation.
Make sure you not only perform each scheduled item, but that you record it as
well, along with any observation about instrument performance. Your records and
notes can be invaluable when trying to trace a service problem.
In addition to the routine and preventive maintenance that you perform, we
recommend annual inspections by Thermo Fisher Scientific customer service
engineers. These yearly checkups ensure that your instrument remains in peak
condition.
122
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Chapter 5
Maintenance and Troubleshooting Notes
Maintenance
Standard Maintenance Schedule
The following table reports the standard maintenance frequency.
.
Table 5-1. Standard Maintenance Schedule
Frequency
Daily
Task
Run Automatic Leak Test.
Run performance check standard as required by method.
Run calibration curve as required by method.
Note gas pressure when the weekly pressure check shows it to be
below 5000 kPa (50 bar or 750 psig).
Weekly
Change injector liner.
Check pressure of gas cylinders. Replace the cylinder when its
pressure drops below 3500 kPa (35 bar or 500 psi).
Change injector septum.
Perform a manual leak test on DPFC and Non-DGFC modules.
Monthly
Check for leaks from the primary gas supply to the GC.
Semiannually
Regenerate the injector inlet vent line trap.
Replace FID jet.
Annually
Clean FID collector.
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123
Chapter 5
Maintenance and Troubleshooting Notes
Maintenance References
Maintenance References
Maintaining a S/SL Injector
The S/SL (Split/Splitless) injector will normally be serviced by Thermo Fisher
Scientific authorized technical personnel. In order to operate at peak
performances, the injector requires periodic maintenance from the user.
This maintenance includes:
•
The replacement of the standard septum
•
The maintenance of the Merlin Microseal Valve when used instead of the
standard septum
•
The cleaning or replacement of the liner
•
The replacement of the carbon filter from the DPFC control module.
Refer to:
•
Chapter 15 of the FOCUS GC Instruction Manual
Maintaining a PPKD Injector
The Purged Packed Column injector and its interface module will normally be
serviced by Thermo Fisher Scientific authorized technical personnel. In order to
operate at peak performances, the injector requires periodic maintenance from the
user.
This maintenance includes:
•
The replacement of the septum
•
The cleaning or replacement of the liner.
Refer to:
•
124
Chapter 15 of the FOCUS GC Instruction Manual
Thermo Scientific FOCUS GC - Service Manual
Chapter 5
Maintenance and Troubleshooting Notes
Maintenance References
Maintaining a FID Detector
To ensure optimum performance of the FID, you must keep it clean and free of
dust and deposits. Symptoms such as reduced sensitivity and increased noise
indicate that detector needs cleaning.
To properly maintain the FID, you should perform the following cleaning or
replacement sequences:
•
Clean/Replace the FID Jet
•
Clean/Replace the FID Collecting Electrode
•
Replace the FID Ignition Assembly
Refer to:
•
Chapter 15 of the FOCUS GC Instruction Manual
Maintaining a TCD Detector
The TCD detector does not usually need current maintenance. Nevertheless, if
you follow a few simple sequences, you will prolong the detector’s lifetime. Pay a
special attention to avoid contamination or damage of the filaments. Follow these
simple rules:
•
Avoid to activate/deactivate the bridge when not necessary. This operation
could considerably reduce the filaments lifetime.
•
Avoid injecting samples that contain halogenated or acid compounds at high
concentrations.
•
Ensure that oxygen (air) could not enter into the filaments cells. Oxidation
would irreversibly damage the filaments. Install traps for moisture and
oxygen on the gas lines to reduce the hazard.
Refer to:
•
Chapter 15 of the FOCUS GC Instruction Manual
Thermo Scientific FOCUS GC - Service Manual
125
Chapter 5
Maintenance and Troubleshooting Notes
Analytical Troubleshooting Notes
Analytical Troubleshooting Notes
This paragraph contains a brief guide for the analytical troubleshooting.
Behavior
Characteristics
Drifting
Baseline
Cause
Remedy
Accumulation of stationary
phase
Replace the end section of the
column.
Carrier gas cylinder
pressure too low to allow
control
Replace the carrier gas cylinder
or increase the pressure.
Drifting carrier gas or
combustion gas flows
Check the gas controllers.
Accumulation of impurities
in column
Check impurity levels in the gas
source. Use correct gas purity.
Carrier gas leak in the
system
Perform a leak test and ensure
the tightness of the connections
on the carrier gas line.
Column is baking out
Allow enough time for the
column to stabilize.
Accumulation of impurities
in column
Check impurity levels in the gas
source. Use correct gas purity.
Contaminated detector
Check the detector and clean it.
Column contaminated
Recondition the column.
Carrier gas flow rate too
high
Reduce the carrier gas flow.
Contaminated column
Recondition the column.
Contaminated gases
Replace gas cylinders or gas
filters.
Falling
Rising
Rising under
temperature
program
operation
High-standing current
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Chapter 5
Maintenance and Troubleshooting Notes
Analytical Troubleshooting Notes
Behavior
Characteristics
Cause
Excessive column
stationary phase bleeding
High-standing current
Irregular
shape
S-shaped
Check the oven temperature,
ensuring it doesn't exceed the
column upper limit.
Recondition the column.
(continued)
Dip after solvent
peak
Remedy
Replace the column.
Loose connections
Ensure all interconnections and
screw connections are tight.
Detector contaminated
Bake out or clean the detector.
Excessive column bleed
during column temperature
programming
Reduce the upper column
temperature. Bake out the
column. Install a high
temperature column.
Oxygen contamination is
decomposing the stationary
phase
Install oxygen filters in carrier
gas line.
Check pneumatic and inlet
systems for leaks.
Use correct gas purity with low
oxygen content.
Square waves
Noise
High-frequency
noise
Large AC power
fluctuations; heavy
equipment on same line
Use a dedicated clean AC line of
sufficient amperage
Contaminated detector
Isolate the detector from
electronics. If noise disappears,
clean the collector.
Combustion-gas flow too
low or too high
Check the detector-gas flows
Contaminated column
Condition the column.
Contaminated detector gas
supply
Check the gas purity and install
appropriate filters
Defective electrometer
Replace electrometer.
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Chapter 5
Maintenance and Troubleshooting Notes
Behavior
Noise
(Continued)
Characteristics
High-frequency
noise
Analytical Troubleshooting Notes
Cause
Remedy
Detector temperature higher
than column maximum
temperature
Reduce the detector temperature
to the column temperature upper
limit.
External electrical
interference
Attach an AC line monitor and
check purity of the AC supply
Loose column fittings
Tighten fittings accordingly.
Loose detector electrical
connections
Make sure the leads are properly
connected.
Defective electrometer or
amplifier
Replace the electrometer or
amplifier
F.s. column too close to
flame (FID)
Lower the column to the correct
position (2-3 mm below the tip
of the jet).
Dirty jet or detector (FID)
Isolate the detector from the
electronics. If noise disappears,
clean the jet and collector.
External electrical
interference
Attach an AC line monitor and
check the purity of the AC
supply
FID temperature too low
Increase the temperature to at
least 150 °C
Operating conditions of the
detector not properly set
Optimize working parameters of
the detector according to the
actual operating mode (Constant
Voltage, Constant Temperature).
Spiking
Refer to the FOCUS GC
Instruction Manual for
instructions.
TCD Low Sensitivity
Thermal conductivity of the
carrier gas is too close to
the one of the compound to
be analyzed
128
Use a different carrier gas.
Refer to the FOCUS GC
Instruction Manual for
instructions.
Thermo Scientific FOCUS GC - Service Manual
Chapter 5
Maintenance and Troubleshooting Notes
Analytical Troubleshooting Notes
Contaminated filaments
TCD Low Sensitivity
Remove contamination by
baking the filaments for one hour
at a temperature higher than the
boiling point of the most highboiling compound.
Perform baking twice if
necessary.
(continued)
If the symptom does not
disappears, contact customer
support organization.
Oxidized filaments
Thermo Scientific FOCUS GC - Service Manual
Contact your customer support
organization.
129
Chapter 5
Maintenance and Troubleshooting Notes
Technical Troubleshooting Notes
Technical Troubleshooting Notes
This paragraph contains the following technical troubleshooting notes:
•
Error Messages
•
Info/Diagnostics
Error Messages
The following Table 5-2 reports the error messages and the explanation of the
relevant correlated cause and remedy:
Table 5-2. Error Messages
Message
TEMP SHUTDOWN
Loss of carrier
Cause
Remedy
The inlet carrier supply is missing
due to:
1.
2.
Open the gas regulator
Replace the cylinder
1.
2.
Perform the injector leak test
Replace the DPFC module
The actual pressure cannot reaches
the setpoint value due to:
1.
1.
2.
3.
Inlet carrier pressure too low
Possible injector leak
DPFC module faulty
2.
3.
Verify and adjust the correct
inlet gas pressure
Perform the injector leak test
Replace the DPFC module
The oven temperature exceeds the
temperature limits. This error may be
due to:
1.
2.
3.
Replace the temperature sensor
Replace the oven TRIAC
Replace the MY04 Board
1.
2.
Gas regulator close
Cylinder empty
The actual pressure value is 0 due to:
1.
2.
HARDWARE SHUTDOWN
Oven T over limits
1.
2.
3.
130
Possible injector leak
DPFC module faulty
Temperature sensor faulty
(open)
Oven TRIAC in short circuit
MY04 Board faulty
Thermo Scientific FOCUS GC - Service Manual
Chapter 5
Maintenance and Troubleshooting Notes
Technical Troubleshooting Notes
Table 5-2. Error Messages (Continued)
Message
Cause
HARDWARE SHUTDOWN
Inlet T over limits
The inlet temperature exceeds the
temperature limits. This error may be
due to:
1.
2.
3.
HARDWARE SHUTDOWN
Det T over limits
2.
3.
1.
2.
3.
Replace the temperature sensor
Replace the injector TRIAC
Replace the MY04 Board
1.
2.
3.
Replace the temperature sensor
Replace the detector TRIAC
Replace the MY04 Board
Temperature sensor faulty
(open)
Injector TRIAC in short circuit
MY04 Board faulty
The detector temperature exceeds the
temperature limits. This error may be
due to:
1.
Remedy
Temperature sensor faulty
(open)
Detector TRIAC in short circuit
MY04 Board faulty
HARDWARE SHUTDOWN
X line T over limits
This message appears when a MS detector is connected to the GC instead of
FID. The MS detector transfer line detector temperature exceeds the
temperature limits. Refer to the relevant MS detector manual.
TEMP SHUTDOWN
Oven not heating
The oven is not heating.
This error may be due to:
1.
2.
3.
4.
5.
6.
TEMP SHUTDOWN
Inlet not heating
Oven heater cable disconnected
Oven door is open
Oven door switch faulty
Oven heater faulty
Oven TRIAC open
MY04 Board faulty
The inlet not heating.
This error may be due to:
1.
2.
3.
4.
5.
Injector heater cable
disconnected
Injector heater faulty
Injector TRIAC open
Injector protection fuses
MY04 Board faulty
Thermo Scientific FOCUS GC - Service Manual
1.
2.
3.
4.
5.
6.
Connect the oven heater cable
Close the oven door
Replace the oven door switch
Replace the oven heater
Replace the oven TRIAC
Replace the MY04 Board
1.
2.
3.
4.
5.
Connect the injector heater cable
Replace the injector heater
Replace the injector TRIAC
Replace the F1 and/or F3 fuses
Replace the MY04 Board
131
Chapter 5
Maintenance and Troubleshooting Notes
Technical Troubleshooting Notes
Table 5-2. Error Messages (Continued)
Message
Cause
TEMP SHUTDOWN
Det not heating
Remedy
The detector is not heating.
This error may be due to:
1.
1.
2.
3.
4.
5.
2.
3.
4.
5.
Detector heater cable
disconnected
Detector heater faulty
Detector TRIAC open
Detector protection fuses
MY04 Board faulty
Connect the detector heater
cable
Replace the detector heater
Replace the detector TRIAC
Replace the F1 and/or F3 fuses
Replace the MY04 Board
TEMP SHUTDOWN
X-line not heating
The MD detector transfer line not heating. Refer to the relevant MS detector
manual.
TEMP SHUTDOWN
Hydrogen alarm
Hydrogen sensor has detected the
hydrogen gas into the oven.
This error may be due to:
1.
2.
3.
HARDWARE SHUTDOWN
Undervoltage alarm
WARNING!
Before starting any
operation, verify that the
system has automatically cuts off the
gas supply and heating to the active
zones, and sweeps the column oven
with forced air ventilation
Probably leaks in the column
connections
Column breakage
Hydrogen sensor faulty
1.
2.
3.
Verify the column connections
Replace the column
Check hydrogen sensor
following the instructions
reported in the relevant manual
The system is not properly operating.
This error may be due to:
1.
1.
•
Verify if the main power line is
correct
If yes, the MY04 Board must be
replaced
If not, verify the main power line
+5 Vdc; ± 15 Vdc supply to electric circuits is too low.
•
Info/Diagnostics
Use this feature to bring up hardware, software and diagnostic information.
In Main Menu move the cursor until the Others page is selected, then press
ENTER. Scroll to Info/Diagnostics then press ENTER.
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Chapter 5
Maintenance and Troubleshooting Notes
Technical Troubleshooting Notes
OTHERS
Info/Diagnostics
A menu appears as the following:
INFO/DIAGNOSTICS
Serial #:
12345678
FW ver:
2.00.31
DPFC ver:
0.27
BOOT ver:
1 B.0
Manufact.:
1/Jan/02
Total runs
1234567
Ambient press
103.0
Table 5-3. Info/Diagnostics (1)
Parameter
Description
INFO/DIAGNOSTICS
This line is the title bar
Serial #:
The number (eight figures) indicates the product code.
FM ver:
Indicates the version of the current firmware of the instrument
DPFC ver:
Indicates the version of the DPFC pneumatic module installed
BOOT ver:
Indicates the version of the current BOOT required to load the firmware of the
instrument. See FW ver:
Manufact.:
Indicates the manufacturing date of your GC.
Total runs
The number (seven figures), indicates the performed analyses.
Ambient press
Indicates the ambient pressure expressed in kPa.
By pressing the sequence of keys SCROLL UP and SCROLL DOWN three times,
four additional normally hidden lines are displayed.
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Chapter 5
Maintenance and Troubleshooting Notes
Technical Troubleshooting Notes
OV 31.8
F= 27
S=off
IN 41.8
F= 30
S=off
F= 25
S=off
DT 25.3
OVPL
10 °C
0.7%
Table 5-4. Info/Diagnostics (2)
Parameter
Description
INFO/DIAGNOSTICS
This line is the title bar
OV, F, S
Where:
• OV = Oven raw temperature from A/D converter
• F = Current temperature value displayed
• S = Temperature setpoint value
IN, F, S
Where:
• IN = Injector raw temperature from A/D converter
• F = Current temperature value displayed
• S = Temperature setpoint value
DT, F, S
Where:
• DT = Detector raw temperature from A/D converter
• F = Current temperature value displayed
• S = Temperature setpoint value
OVPL, X °C, Y%
Where:
• OVPL = Oven Power Level
• X °C = Oven raw temperature from the A/D converter
• Y % = Percentage of the power required to maintain the oven temperature
134
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Chapter 5
Maintenance and Troubleshooting Notes
Technical Troubleshooting Notes
Hydrogen Sensor Setting
The presence of the hydrogen sensor is selected in Carrier Configuration
menu. By pressing the sequence of keys SCROLL UP and SCROLL DOWN three
times, an additional normally hidden line is displayed.
CONFIGURE CARRIER
Gas type
Helium
Hydrogen sensor?
Y
Selecting Y (yes) the hydrogen gas selection is enabled.
CONFIGURE CARRIER
Gas type
Hydrogen
Hydrogen sensor?
Y
WARNING! If the hydrogen sensor is not properly installed on the GC, the hydrogen gas
selection as carrier gas is not possible.
Changing the GC Manufacturing Data
WARNING! This operation must be performed only for service purpose.
Please contact the Thermo Fisher Scientific, Milan International Customer Support
Department for instructions.
Thermo Scientific FOCUS GC - Service Manual
135
Chapter 5
Maintenance and Troubleshooting Notes
136
Technical Troubleshooting Notes
Thermo Scientific FOCUS GC - Service Manual
6
Schematic Drawings Summary
This chapter contains the list of the drawings.
Chapter at a Glance…
Drawings List .....................................................................................................138
Thermo Scientific FOCUS GC - Service Manual
137
Chapter 6
Schematic Drawings Summary
Drawings List
Drawings List
Use this table for a listing of all schematics and component layouts. The drawing
and layout numbers have been included for easy reference:
Table 6-1. Drawings List
PCB
Drawing
Layout
FOCUS GC with FID Schematic Diagram
SE 1529; Rev.A; 1/3
SC 817; 1/1
FOCUS GC with FID Wiring Diagram
---
SC 818; Rev.A; 1/1
FOCUS GC with TCD Schematic Diagram
SE 1528; 1/3
SC 819; 1/1
FOCUS GC with FID Wiring Diagram
---
SC 820; Rev.A; 1/1
MY04
Main Board
SE 1526; 1/7
PC 1206; Rev.A; 1/1
ELI201
Electrometric Board for FID
SE 1467; Rev.C; 1/2
PC 1166; Rev.F; 1/1
CVA201
Pre-amplifier Box for FID
SE 1462; 1/1
PC 1162; 1/1
TCDI203
Electrometer Board for TCD
SE 1522; Rev.A; 1/3
PC 1204; Rev.C; 1/1
TCDE203
Box for TCD
SE 1523; Rev.A; 1/4
PC 1205; Rev.B; 1/1
Carrier Module Board
SE 1453; Rev.E; 1/3
PC 1152; Rev.F; 1/1
IFM311
LAN Option
SE 1527; 1/1
PC 1207; Rev.A; 1/1
FRTMY100
Front Panel
SE 1465; 1/1
PC 1164; Rev.B; 1/1
Keypad
Keypad
885 105 503; 1/1
---
Display
LCD Display Panel
305AD5 (1/3)
---
IEPC
138
Description
Thermo Scientific FOCUS GC - Service Manual
Glossary
This glossary lists and defines terms used in this guide. Included are abbreviations, acronyms, metric
prefixes, and symbols.
A
A
ampere
ac
alternating current
ADC
analog-to-digital converter
B
b
bit
B
byte (8 b)
baud rate
data transmission speed in events per second
C
ºC
Celsius
CIP
Carriage and Insurance Paid To
cm
centimeter
CPU
central processing unit (of a computer)
CSE
Customer Service Engineer
D
d
depth
DAC
digital-to-analog converter
dc
direct current
DGFC
Digital Gas Flow Control
DPFC
Digital Pressure and Flow Control
DS
data system
Thermo Scientific FOCUS GC - Service Manual
139
Glossary
E
EMC
electromagnetic compatibility
EPROM
Erasable Programmable ROM
ESD
electrostatic discharge
F
ºF
Fahrenheit
f
frequency
FID
Flame Ionization Detector
FOB
Free on Board
ft
foot
G
g
gram
GC
gas chromatograph
GND
electrical ground
H
h
height
h
hour
harmonic
distortion
A high-frequency disturbance that appears as distortion of the
fundamental sine wave
HV
high voltage
Hz
hertz (cycles per second)
I
IEC
140
International Electrotechnical Commission
Thermo Scientific FOCUS GC - Service Manual
Glossary
impulse
See transient
in.
inch
I/O
input/output
K
k
kilo (103 or 1024)
K
Kelvin
kg
kilogram
kPa
kilopascal
L
l
length
L
liter
LAN
Local Area Network
lb
pound
LED
light-emitting diode
M
m
meter (or milli [10-3])
M
mega (106)
µ
micro (10-6)
min
minute
mL
milliliter
mm
millimeter
m/z
mass-to-charge ratio
N
Thermo Scientific FOCUS GC - Service Manual
141
Glossary
n
nano (10-9)
non-DGFC
Manual Detector gases Flow Control
O
Ω
ohm
P
p
pico (10–12)
Pa
pascal
PCB
printed circuit board
PN
part number
PPKD
Purged Packed Column Injector
psi
pounds per square inch
R
RAM
random access memory
RF
radio frequency
ROM
read-only memory
RS-232
industry standard for serial communications
S
142
s
second
sag
See surge
slow average
A gradual, long-term change in average RMS voltage level,
with typical durations greater than 2 s
S/SL
Split/splitless injector
Thermo Scientific FOCUS GC - Service Manual
Glossary
surge
A sudden change in average RMS voltage level, with typical
duration between 50 µs and 2 s
T
TCD
Thermal Conductivity Detector
transient
A brief voltage surge of up to several thousand volts, with a
duration of less than 50 µs
V
V
volt
V ac
volts, alternating current
V dc
volts, direct current
VGA
Video Graphics Array
W
w
width
W
Watt
Thermo Scientific FOCUS GC - Service Manual
143
Index
A
About This Manual 9
Conventions Used 10
Overview 9
Air Flap 54
Air Flap Spring 58
Air Flap Stepping Motor 55
Analytical Troubleshooting 126
Automation
Internal 22
Autosampler
Interface 22
Autosampler Interface 22
Autosamplers
Interface 38
Autosamplers Interface 38
B
Base Unit 21
Board
CVA201 115
ELI201 113
FRTMY100 118
MY04 (CPU) 97
TCDE203 117
TCDI203 116
C
Calibration
DPFC Module 35
Capillary Detector Base Body
Manual Leak Test 33
CB71 Detector Assembly 71
Cleaning 18
Cleaning Gas Lines 30
Communication
with External Units 22
Connectors 98
How to Dismounting 106
Conventions Used 10
CVA201 Electrometer Preamplifier 115
CVA201 Pre-amplifier Box 88, 89
Interface 22
Data Systems Interface 22
Decontamination 18
Detector 70
Detector Heater 74
Devices Option 38
Diagnostics 132
Document Set
Use 14
DPFC Module 60
Calibration 35
DPFC Module Calibration 35
E
Electrometer Board 113
Electrometer Preamplifier
CVA201 115
Electronic Boards 86, 91
Electronic Cassette 81, 82, 94
Electronic Parts Replacements 80
ELI201 Board 87
ELI201 Electrometer Board (FID) 113
Error Messages 130
Exterior
cleaning 18
External Devices
Autosamplers 22
External Units
Communication 22
F
FID Detector 29
Fittings 25
Requirements 25
Flame Ionization Detector Controller
Component Layout 108, 113, 115, 116, 117, 118, 119
FOCUS GC
Document Set 14
Internal View 28
Series Differences 28
FOCUS™ GC Series 28
Front Panel 85
FRTMY100 Board 118
D
Data Systems
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145
Index
G
K
Gas
Requirements 24
Gas Line
Purging 30
Gas Lines 25
Cleaning 30
Requirements 25
Gas Regulators 25
Requirements 25
Gases
Use 16
Gases Purity
Requirements 24
GC Oven 28
Keypad 118
Kits Option 38
H
Hazardous material
decontamination 18
spills 18
Hydrogen
Sensor
Use 18
Use 17
Hydrogen Sensor 18
Setting 135
I
Info 132
Injector 65, 92
Instrument
Automation 22
Classification 15
Decontamination 18
Markings 12
Symbols 12
Technical Features 15
Interface
Autosampler 22
Autosamplers 38
Data System 22
Internal Automation 22
Internal View 28
Instrument
Cleaning 18
146
L
LAN Option 119
Leak Test
Capillary Detector Base Body Manual 33
External FOCUS™GC 31
M
Main Cassette 92
Main MY04 Board
Connectors
Dismounting 38
Maintaining a FID Detector 125
Maintaining a PPKD Injector 124
Maintaining a S/SL Injector 124
Maintaining a TCD Detector 125
Maintenance 121, 122
Schedule Table 123
Standard Schedule 123
Suggested Schedule 122
Manufacturing Data 135
Changing 135
Marking 12
Markings 12
Material Safety Data Sheets 18
Mechanical Parts Replacement 42
Merlin Valve Kit 38
MY04 Board 87
Description 108
Introduction 97
N
Non-DGFC Module 62
Notes
Analytical Troubleshooting 126
Maintenance 121
Power Supply 101
Troubleshooting 121
O
Option
Devices 38
Thermo Scientific FOCUS GC - Service Manual
Index
Kits 38
Oven 42, 92
Oven Cryo System 39
Oven Door Switch 52
Oven Fan 50
Oven Heater 47
Oven Hydrogen Sensor 38
Oven Motor 51
Oven Sensor 45
P
Packed Column Installation 39
Parts Replacement 41
Plumbing
Requirements 24
Pneumatic Modules 59
Power Quality 23
Power Supply 101
Preliminary Tests 30
Purging Gas Lines 30
R
Receptacle Pod 107
Receptacle Shroud 107
Regulations 30
Replacement
Air Flap Spring 58
Air Flap Stepping Motor 55
CB71 Detector Assembly 71
CVA201 Pre-amplifier Box 88, 89
Detector Heater 74
Detector Thermal Sensor 74
DPFC Module 60
Electronic Cassette 82
Electronic Parts 80
ELI201 Board 87
Front Panel 85
Mechanical Parts 42
MY04 Board 87
Non-DGFC Module 62
Oven Door Switch 52
Oven Fan 50
Oven Heater 47
Oven Motor 51
Oven Sensor 45
Thermo Scientific FOCUS GC - Service Manual
Parts 41
S/SL Heater 69
S/SL Injector Assembly 65
S/SL Thermal Sensor 69
Replacement
TCD Detector Assembly 76
Requirements
Fittings 25
Gas 24
Gas Lines 25
Gas Purity 24
Gas Regulators 25
Plumbing 24
S
S/SL Heater 69
S/SL Injector 29
S/SL Injector Assembly 65
S/SL Thermal Sensor 69
Safety Information 16
Use of Gases 16
safety symbols 10–??
Schematic Diagrams 96
Spare Parts
Electronics 138
Symbols 12
T
TCDE203 Board 117
TCDI203 Electrometric Board 116
TCDI203 Electrometric Board (TCD) 116
Technical Features 15
Technical Notes 27
Time Events 119
Troubleshooting 121, 126
U
Use of Gases 16
Using Hydrogen 17
Using the Hydrogen Sensor 18
147
Index
148
Thermo Scientific FOCUS GC - Service Manual
Operating Sequences
Cleaning and Purging Gas Lines .......................................................................................................30
External GC Leak Test ......................................................................................................................31
Injector Manual Leak Test .................................................................................................................32
Detector Base Body Manual Leak Test .............................................................................................33
DPFC Module Calibration .................................................................................................................35
How to Remove the Top and Rear Covers ........................................................................................43
How to Replace Oven Sensor ............................................................................................................45
How to Replace Oven Heater ............................................................................................................47
How to Replace the Oven Fan ...........................................................................................................50
How to Replace the Oven Motor .......................................................................................................51
How to Replace the Oven Door Switch .............................................................................................52
How to Replace the Air Flap Stepping Motor ...................................................................................55
How to Replace Air Flap Spring ........................................................................................................58
How to Replace the DPFC Module ...................................................................................................60
How to Replace the Non-DGFC Module ..........................................................................................62
How to Replace the S/SL or PPKD Injector Assembly .....................................................................65
How to Replace the S/SL or PPKD Temperature Sensor and Heater ...............................................69
How to Replace the CB71 Detector Assembly .................................................................................. 71
How to Replace the FID Temperature Sensor and Heater .................................................................74
How to Replace the TCD Detector Assembly ...................................................................................76
How to Replace the Complete Electronic Main Cassette ..................................................................82
How to Replace the Front Panel ........................................................................................................85
How to Replace MY04 and Electrometric Boards ............................................................................ 87
How to Replace CVA201 Pre-amplifier Box ....................................................................................88
How to Replace TCDE203 Box .........................................................................................................89
How to Dismounting the Connectors .................................................................................................106
Figures
Figure 2-1.
Figure 2-2.
Figure 3-1.
Figure 3-2.
Figure 3-3.
Figure 3-4.
Figure 3-5.
Figure 3-6.
Figure 3-7.
Figure 3-8.
Figure 3-9.
Figure 3-10.
Figure 3-11.
Figure 3-12.
Figure 3-13.
Figure 3-14.
Figure 3-15.
Figure 3-16.
Figure 3-17.
Figure 3-18.
Figure 3-19.
Figure 3-20.
Figure 3-21.
Figure 3-22.
Figure 3-23.
Figure 3-24.
Figure 3-25.
Figure 3-26.
Figure 3-27.
Figure 3-28.
Figure 3-29.
Figure 3-30.
Figure 3-31.
Figure 3-32.
Figure 3-33.
Figure 3-34.
Figure 3-35.
Oven Internal View ......................................................................................................28
Kit Calibration Box Connections .................................................................................36
Top Aluminium Cover Removal (1) ............................................................................ 43
Rear Panel.....................................................................................................................44
Back Cover Removal (1) ..............................................................................................45
Oven Temperature Sensor (1) ......................................................................................46
Oven Temperature Sensor (2) ......................................................................................46
Back Cover Removal (2) ..............................................................................................47
Main Board Cables Connection (1)..............................................................................48
Diaphragm Screws........................................................................................................49
Correct Oven Fan Position ...........................................................................................50
Main Board Cables Connection (2)..............................................................................51
Oven Motor Nut Position .............................................................................................52
FOCUS GC Right Panel...............................................................................................53
Door Switch..................................................................................................................53
Air Flap System............................................................................................................54
FOCUS GC Left Panel .................................................................................................55
Stepping Motor Cable...................................................................................................56
Security Dowel .............................................................................................................56
Stepping Motor Screws ................................................................................................57
Security Dowel Position ...............................................................................................57
Air Flap Clips ...............................................................................................................58
Brass Bush ....................................................................................................................59
DPFC Module Connections.......................................................................................... 60
DPFC Module...............................................................................................................61
Non-DGFC Module for FID Inlet Connections ...........................................................62
Non-DGFC Module for FID Cables Connections........................................................63
Non-DGFC Module for TCD Inlet Connections..........................................................64
Non-DGFC Module for TCD Cables Connections ......................................................64
Insulating Material Cover.............................................................................................66
Injector Temperature Sensor and Heater Screw ...........................................................67
Nut Inside the Oven......................................................................................................67
Column Adapter ...........................................................................................................68
Back Cover Removal (3) ..............................................................................................69
Main Board Cables Connection (3)..............................................................................70
Detector Insulating Material Cover ..............................................................................71
3-Line Pre-assembled Plate Fixing Screw.................................................................... 72
Figure 3-36.
Figure 3-37.
Figure 3-38.
Figure 3-39.
Figure 3-40.
Figure 3-41.
Figure 3-42.
Figure 3-43.
Figure 3-44.
Figure 3-45.
Figure 3-46.
Figure 3-47.
Figure 3-48.
Figure 3-49.
Figure 3-50.
Figure 3-51.
Figure 4-1.
Figure 4-2.
Figure 4-3.
Figure 4-4.
Figure 4-5.
Figure 4-6.
Figure 4-7.
Figure 4-8.
Figure 4-9.
Figure 4-10.
Figure 4-11.
Figure 4-12.
Detector Base Body Fixing Nut ...................................................................................72
Heater-Temperature Sensor Fixing Nut .......................................................................73
Back Cover Removal (4) ..............................................................................................74
Main Board Cables Connection (3)..............................................................................75
TCD Detector Assembly ..............................................................................................76
“-Line Pre-assembled Plate Removal)..........................................................................77
Back Cover Removal (5) ..............................................................................................77
Main Board Cables Connection (4)..............................................................................78
TCD Detector Assembly Removal............................................................................... 78
FOCUS™ GC Left Panel .............................................................................................83
Back Covers and Electronic Main Cassette Screw.......................................................83
FID Cables....................................................................................................................84
Back Covers and Electronic Cassette Screw (2) ..........................................................85
Front Panel Internal View ............................................................................................86
MY04 Main Board .......................................................................................................88
TCDE203 Box ..............................................................................................................90
FOCUS™ GC with FID Main Board Block Diagram .................................................94
FOCUS™ GC with TCD Main Board Block Diagram................................................ 95
MY04 Main Board .......................................................................................................97
Front View of Timed Event Connector ........................................................................ 100
Front View of Generic Handshake Connector .............................................................101
Front View of Sampler Signal Connector .................................................................... 103
Autosampler Connector................................................................................................104
Computer Connector .................................................................................................... 104
Back Cover ................................................................................................................... 106
Receptacle Shroud ....................................................................................................... 107
Receptacle Pod ............................................................................................................. 107
Thermoregulation Principle..........................................................................................111
Tables
Table 4-1.
Table 4-2.
Table 4-3.
Table 4-4.
Table 4-5.
Table 4-6.
Table 4-7.
Table 4-8.
Table 4-9.
Table 4-10.
Table 4-11.
Table 4-12.
Table 4-13.
Table 4-14.
Table 4-15.
Table 4-16.
Table 4-17.
Table 5-1.
Table 5-2.
Table 5-3.
Table 5-4.
Table 6-1.
Main Schematic Diagrams ...........................................................................................96
Fuses .............................................................................................................................98
Connectors....................................................................................................................98
Timed Event Connector................................................................................................ 100
Code-Phases ................................................................................................................. 101
Generic Handshake Connector .....................................................................................102
Autosampler Connector................................................................................................103
Autosampler Connector................................................................................................104
Computer Connector ....................................................................................................105
Other Connectors.......................................................................................................... 105
MY04 Main Board Schematics ....................................................................................108
ELI210 Electrometer Board Schematics ..................................................................... 113
CVA201 Pre-amplifier Board Schematics ..................................................................115
TCDI203 Electrometric Board Schematics .................................................................116
TCDE203 Board Schematics.......................................................................................117
FRTMY100 Board Schematics ...................................................................................118
IFM3111 LAN Option Schematics ............................................................................. 119
Standard Maintenance Schedule...................................................................................123
Error Messages ............................................................................................................. 130
Info/Diagnostics (1)...................................................................................................... 133
Info/Diagnostics (2)...................................................................................................... 134
Drawings List ............................................................................................................... 138