Chemical Analysis Group Lifecycle
User Information Plan
Document Information:
Filename
Current Owner
Product Identifier
Project Identifier
Revision Log:
Date
April 20, 2007
USERINFO.DOC
Deborah Perkins
R1921A
Ohana
Reason For Update
Initial Release
Course Description
1 – Day lecture only training for troubleshooting and maintenance of the 7890 GC and the 7683 ALS with the following hardware:

Inlets hardware; Purged Pack and Split/Splitless

Detector hardware; Thermal Conductivity and Flame Ionization detectors

Mainframe and Electronics hardware

Course is data system independent. Although current revision of Chemstation and
LMD software are discussed.
Course Outline with Correlation to
This is a great deal of material for one day. I would set expectations that you may not go over certain sections – instructor choice. However, this course is taught the same way for 6890.

Module 1: Agilent 7890 GC Overview
In This Section, We will discuss
Definitions
7890 Front View
7890 Rear View
7890 Front & Side View
7890 Top View
7890 Top View
Front View Cover Off
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Chemical Analysis Group Lifecycle
User Information Plan
Left Side View Cover Off
Back View Cover Off
Right Side View Cover Off
Gas Supply Characteristics
Gas Supply Requirements
Gas Traps and Filters
Recommended Carrier Gas Plumbing
Gas System Controls
Gas Supply Tubing
Gas System Maintenance
Overview of Available Inlets
7890 Inlets Overview
Overview of Available Detectors
Detector Descriptions

Module 2: An Introduction to Logical Troubleshooting
In This Section, We will discuss
Troubleshooting Process
Know Operational Fundamentals
Gather Information
Verify Information
Verify Parameters
Isolate Problem
Fix Problem
Verify Fix
Document Fix
Make a Preventive Maintenance Task
Chromatographic Troubleshooting
Instrument Troubleshooting
Preventive Maintenance

Module 3: Agilent 7890 Diagnostics
In This Section, We will discuss
Reference Documentation
Chromatographic Troubleshooting Tools
Common Tools
Instrument Tools/Supplies
Error Messages and Logbooks
7890 Keyboard
Service Mode Key
Chemstation Log
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Chemical Analysis Group Lifecycle
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Laboratory Monitor and Diagnosis Software
Laboratory Monitor and Diagnostic Software
LMDS Key Features
Laboratory Monitor and Diagnosis Software lite/stout
Laboratory Monitor and Diagnosis Software versions
Laboratory Monitor and Diagnosis Software – System Overview
Laboratory Monitor and Diagnosis Software – System Overview – Install screen
Troubleshooting Example – Normal Chromatogram
LMDS – Manuals
Laboratory Monitor and Diagnostic Software
Agilent Lab Monitor and Diagnostic Software – Monitoring GC
Agilent Lab Monitor and Diagnostic Software – Lab at a Glance
Agilent Lab Monitor and Diagnostic Software – System Components
Agilent Lab Monitor and Diagnostic Software – Current Advisories
Agilent Lab Monitor and Diagnostic Software – Managing Alerts
LMDS Performing a Checkout Test
LMDS Performing a Pressure Decay Test
LMDS Scheduled Activities
LMDS Tools
LMDS Documentation
LMD – Workstation Configuration
LMD – Client/Server Configuration
LMD – Client/Server Configuration cont’d
Problem Chromatogram
Isolate the Problem to a Functional Area
Functional Areas
Troubleshooting Instrument Status
Solve the Problem

Module 4: Inlets
In This Section, We will discuss
What is an Inlet?
Inlet Types
SSI Injection Modes
SSI Split Mode
SSI Split Flow Diagram
SSI Split Mode Flow Example
SSI Split Flow Calculations
7890 Split/Splitless Inlet
SSI Splitless Mode
SSI Splitless Flow Diagram
SSI Splitless Mode Flow Example
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SSI Gas Saver Mode
Gas Saver
7890 Insert Weldment
Variable Septum Purge
Effects of Septum Purging
Controlling the Septum Purge
SSI Problem #1
SSI Problem #2 – Which Flow was Adjusted
SSI Problem #3 – Which Flow was Adjusted
SSI Problem #4
SSI Septa and Merlin Microseal
SSI Assembly
SSI Assembly cont’d
SSI Inlet Body
SSI Seals
SSI Split Vent Trap
7890 – SSI Capillary Inlet Minimizing System Back Pressure – High Split Flows
Split Liner
Splitless Liner
SSI Liner Volume vs Sample Volume
EPC Modules
SSI EPC Module
EPC Module Constant Pressure vs Constant Flow
SSI Leak Test
SSI Pressure Decay Test
SSI Pressure Decay Test Diagram
Are You Having a Problem Finding a Leak?
SSI Split Mode Troubleshooting
SSI Splitless Mode Troubleshooting
Purged – Packed Inlet (PPI)
PPI Flow – Controlled Flow Diagram
PPI Pressure – Controlled Flow Diagram
PPI Problem #1
PPI Assembly
PPI Liner and Adapter Installation
PPI Assembly
PPI Liners and Inserts
PPI Column Installation
EPC Replaceable Parts
PPI pressure Decay Test
PPI Pressure Decay Test Flow Diagram
Typical Injection Port Problems
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Detecting Leaks
Routine Injection Port Maintenance
Inlets Worksheet

Module 5: ALS Troubleshooting and Maintenance
In This Section, We will discuss
7683 Reference Documentation
What is an Automatic Sampler (ALS)
7683 Series Hardware
7683 Modules
ALS Connections to 7890 GC
Isolating the Problem
Chromatographic Troubleshooting
Peak Area/Retention Time Variability
Sample Carryover
Peak Area Discrimination
Peak Not Displayed/No Peaks
Contamination and “Ghost Peaks”
ALS Troubleshooting
7683 LED Indicators
7683 Diagnostics
7683 Injector Turret Assembly
Optional Turrets
7683 Injector Turret Alignment
Needle Support Assembly
Preventive and Routine Maintenance

Module 6: Column Troubleshooting and Maintenance
In This Section, We will discuss
Model of Chromatographic Process
Column Types
Capillary Column Problem #1
Capillary Column Problem #2
Capillary Column Problem #3
Capillary Column Problem #4
Capillary Column Problem #5
Typical Chromatographic Problems
No Peaks
Poor Response
One or More Peak Missing
Tailing Peaks
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Deterioration by Contaminated Carrier Gas
Column Configuration
Factors that Cause Column Damage
Column Restoration
Column Rinsing Effects
Column Rinsing
Column Care: Column Conditioning
Column Storage

Module 7: Detector Troubleshooting and Maintenance
In This Section, We will discuss
What is a GC Detector
Detector Types
Detector Sensitivity Comparison
Flame Ionization Detector (FID)
7890 Flame Ionization Detector
FID Detector Cutaway
FID Response/Selectivity
7890 Flame Ionization Detector
7890 Flame Ionization Detector
FID Problem #1
FID Problem #2
7890 FID Jets
7890 FID Setup – Column Installation
FID Parameters
FID Flow Rates
FID Pressure/Flow Relationship
Exploded Parts View of the FID
7890 Flame Ionization Detector
7890 FID EPC Flow Module
FID EPC Module
FID EPC Module Replacement Parts
7890 FID - Problems
Solving FID Lighting Problems
Solving FID Noise Problems
Routine FID Maintenance
7890 Flame Lighting Problems
7890 Planned Maintenance
Thermal Conductivity Detector (TCD)
7890 Thermal Conductivity Detector
Thermal Conductivity Basics
7890 Thermal Conductivity Detector
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7890 TCD – Theory of Operation
7890 TCD – Theory of Operation cont’d
TCD Normal Flow Ratio
Reference Flow too High
Reference Flow too Low
TCD Problem #1
TCD Parameters
TCD Flow Rates
Choosing Reference Flow Rate
TCD EPC Flow Diagram
7890 TCD EPC Module
7890 TCD
TCD Board Connections
TCD Parts Explosion
Thermal Conductivity Detector Cell
TCD Typical Problems
Solving TCD Problems
TCD Cleaning Procedure
Routine TCD Maintenance
Electron Capture Detector
ECD Theory of Operation
7890 uECD Cell
7890 ECD Detector Sensitivity
7890 uECD
7890 uECD Flows
7890 uECD EPC Module
ECD Routine Maintenance
7890 ECD Exchange
ECD Checkout
7890 ECD Test
ECD Repair – Return to Factory
Detector Worksheet

7890 Electronics Overview
In This Section, We will discuss
Electrical Safety Precautions
Safety Precautions
ESD
ESD Precautions
7890 Overview of Power Requirements
7890 Power Requirements
7890 Diagnostic Symptoms
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User Information Plan
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7890 Options Key
7890 Configuration Key
7890 Service Mode
7890 Logs
7890 Boards
7890 Digital Signal
7890 Oven Motor
7890 Oven Motor Fan Rotation - Heating
7890 Oven Motor Fan Rotation - Holding
7890 Oven Motor Fan Rotation – Cooling
External Connectors
7890 EPC Module
7890 EPC Modules – Full Pack
7890 Oven Heater Shroud
7890 Oven Sensor Location
Oven Heater Resistance
7890 Oven Heater Shrouds
7890 Heater/Sensor Resistance
7890 Oven Flapper Motor
7890 AC Board
7890 AC Board Fuses
7890 Replaceable Components
Troubleshooting and Maintenance
Electronics Worksheet

Module 9: Data System Troubleshooting
In This Section, We will discuss
Method vs Computer
Data Acquisition Problem #1
Data Acquisition Problem #2
Data Acquisition Problem #3
Data Acquisition Problem #4
Steps in Networking an Instrument
Single Instrument/Single Chemstation
Multi Instrument/Single Chemstation LAN
Multi Instrument/Multi Chemstation LAN
7890 IP Address
Checking IP Address
Configuration Editor
Data System Problems
Maintaining the Computer System
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User Information Plan
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
Module 10: Troubleshooting and Maintenance Review
In This Section, We will discuss
Process Funnel … Again… Again
Things to Remember
Spare Consumable Stock
Consumables
Gold Seal
Scheduled Maintenance Pays
PM Schedule: Daily/Weekly
PM Schedule: Monthly/Quarterly
PM Schedule: Semi-Annually/Annually

Appendix
Documentation Reference
GC Supply Vendors
Agilent Moisture Trap Information
Overview of Chromatographic Checkout
TCD Checkout
FID Checkout uECD Checkout
NPD Checkout
FPD Checkout
7890 Symptoms and Diagnostics Overview

Electronic Files
Available on the EPI warehouse filed under H1914A
Course Manuals (Student or Instructor .doc or .pdf format)
Individual module and lab files also available in .doc format.
Power Point File
Module 1:
Module 2:
Module 3:
Module 4:
Module 5:
Module 6:
Module 7:
Module 8:
01_Agilent 7890 GC Overview.ppt
02_An Introduction to Logical Troubleshooting.ppt
03_Agilent 7890 Diagnostics.ppt
04_Inlets.ppt
05_ALS Troubleshooting and Maintenance.ppt
06_Columns
07_ FID_TCD_ECD Detectors.ppt
08_7890 Electronics Overview.ppt
Module 9:
Module 10:
09_DataSystem Troubleshooting and Maintenance.ppt
10_Troubleshooting and Maintenance Review.ppt
There is a student lecture manual and an instructor lecture manual.
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Chemical Analysis Group Lifecycle
User Information Plan

Lecture material consists of electronic Power Point presentations. A high resolution
Proxima or NEC projector is required. The student manual is a word document containing notes for each Power Point slide and lab exercises for each module.

Student manuals, pen and paper pad
N/A lecture only

Technical familiarization with the operation, maintenance, and repair of the Agilent
7890 GC. Chemstation software and LMD Software.

Ability to troubleshoot and repair typical operational problems that can occur when
 systems are operated by neophyte users.
Experienced in the delivery of classroom/lab training.
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Chemical Analysis Group Lifecycle
User Information Plan
Use this section to define terms and acronyms used in this document that would typically be unfamiliar to management and/or technical staff on other projects.
Term / Acronym
Support services
Definition
Customer Support Services, ex IQ, OQ/PV, educational, I&F, maintenance contracts
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