CMR X-Ray, LLC
2000 Pewaukee Road, Suite H
Waukesha, Wisconsin 53188 Copyright CMR X-Ray, March 2015

1)   PRE-­‐INSTALLATION  ........................................................................................................  1
1.1  Introduction  ..........................................................................................................................................  1
1.2  Dimensions,  Weight  and  Cable  Access  ..................................................................................................  1
1.3  Environmental  Requirements  ...............................................................................................................  3
1.4  Packaging  .............................................................................................................................................  3
1.5  Electrical  Requirements,  208  to  480  Volt  Lines  ......................................................................................  4
1.6  Electrical  Requirements,  Power  Assist  Units  ..........................................................................................  6
1.7  Safety  Devices  .......................................................................................................................................  6
2)   INSTALLATION  .................................................................................................................  8
2.1  Introduction  ..........................................................................................................................................  8
2.2  Tools  and  Materials  ..............................................................................................................................  8
2.3  Measurement  Equipment  .....................................................................................................................  9
2.4  Pre-­‐Installation  Check  ...........................................................................................................................  9
2.5  Unpacking  .............................................................................................................................................  9
2.6  Power  Cabinet  Installation  /    power  assist  ..........................................................................................  10
2.7  Operator  Console  Installation  .............................................................................................................  10
2.8  Interface  Connections  .........................................................................................................................  11
2.8.1  Generator  Connections  Left  side  .........................................................................................................  11
2.8.2  Generator  connections  right  side  ........................................................................................................  12
2.8.3  T1  Voltage  Taps,  Rotor  and  Filament  ..................................................................................................  13
2.8.4  X-­‐Ray  Tube  Stator  Connections  ...........................................................................................................  14
2.8.5  DiGital  Interface,  2TS2  .........................................................................................................................  16
2.8.6  Relay  Board,  Bucky  Interface,  2TS3  .....................................................................................................  17
2.8.7  System  Connect,  2TS4  .........................................................................................................................  18
2.8.8T1  Power  Module  AUX  Power  ..............................................................................................................  19
2.8.9  T1  Taps  (Rotor  &  Filament)  and  Fuses  .................................................................................................  20
2.8.10  TS-­‐1-­‐1  Power  assist  transformer  input  ..............................................................................................  21   i
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GMX X-RAY GENERATOR
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3)  GENERATOR  CONFIGURATION  ........................................................................................  22
3.1  Configuration  procedure  .....................................................................................................................  22
4)  CALIBRATION  ........................................................................................................................  29
4.1  TRUE-­‐TRACK  Calibration  with  Computer  .............................................................................................  29
4.2  Typical  mA  and  kV  Wave  Forms  ..........................................................................................................  33
5)  TROUBLESHOOTING  ...........................................................................................................  35
5.1  Introduction  ........................................................................................................................................  35
5.2  Service  RECOMMENDATIONs  ..............................................................................................................  35
5.3  Error  Codes  .........................................................................................................................................  36
5.3.1  ERROR  Code  Descriptions  ....................................................................................................................  37
6)  RENEWAL  PARTS  .................................................................................................................  38
6.1  Power  Module  ....................................................................................................................................  38
6.2LINE  Inverter  ........................................................................................................................................  40
7)  ACCEPTANCE  TESTING  .......................................................................................................  41
7.1  Introduction  ........................................................................................................................................  41
7.2  Preliminary  Testing  .............................................................................................................................  41
7.3  X-­‐Ray  Time  Measurement  ...................................................................................................................  42
7.8  kV/mA  X-­‐Ray  Measurement  ...............................................................................................................  44
7.8  Linearity  .............................................................................................................................................  46
7.8  Repeatability  ......................................................................................................................................  48
SUPPLEMENT      B    POWER  ASSIST  .....................................................................................  50
SUPPLEMENT      C    USEFUL  TABLES  ....................................................................................  52
SUPPLEMENT      D    HV  CABLE  MAINTENANCE  ................................................................  53   ii

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1.1 INTRODUCTION
Planning and preparing the customer site.
This list contains the main topics to consider during pre-installation planning:
•
Equipment dimensions
•
Installation and sizing of the electrical supply
•
Installation of safety devices, Door Interlocks, X-Ray On-Lamps,
Disconnect Circuit Breakers, etc.
1.2 DIMENSIONS, WEIGHT AND CABLE ACCESS
POWER MODULE
DIMENSIONS:
FRONT 23”
SIDE 24”
HEIGTH 19.5”
WEIGHT 178 lbs.
(Illustrated W/O covers)
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POWER ASSIST
DIMENSIONS:
FRONT 23”
SIDE 24”
HEIGTH 10.0”
WEIGHT 98 lbs.
(Illustrated W/O covers)
BASIC RAD CONSOLE
DIMENSIONS:
FRONT 11.25”
SIDE 9.75”
HEIGTH 4.5”
WEIGHT 4.75 lbs.
1.1 GENERATOR COMPONENTS
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1.3 ENVIRONMENTAL REQUIREMENTS
•
Temperature: 10ºC to 40ºC (50˚F to 104˚F).
•
Relative Humidity 0 to 90%.
•
Maximum Altitude: 2440 meters (8000 feet) above sea level.
Note: This X-Ray Generator will dissipate 544 btu/hr.
1.4 PACKAGING
1.7
SHIPPING CRATE
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1.5 ELECTRICAL REQUIREMENTS, 208 TO 480 VOLT LINES
Model
GMX 325 RAD
GMX 525 RAD
GMX 625 RAD
Power Supply
(kW)
Voltage
(VAC)
Frequency
(Hz)
50/60
50 kW
60 kW
220, 3Ø
380, 3Ø
50/60
50/60
50/60 GMX 825 RAD 80 kW 480, 3Ø
1.2 LINE VOLTAGES
Model
Power and Ground Wire Size (AWG):
Power Ground Power Ground Power Ground Power Ground Power Ground Power Ground
GMX 625 RAD 2
GMX 825 RAD 2
0 to 30m
GMX 325 RAD 1/0
GMX 525 RAD 1/0
6
6
6
31 to 50m
1/0
1/0
1/0
6
6
6
51 to 70m
2/0
2/0
2/0
2
2
2
71 to 90m
3/0
3/0
3/0
2
2
2
8 1/0 6 2/0 2 3/0 2
1.31 POWER AND GROUND WIRE SIZING
91 to 110m 111 to 130m
4/0
4/0
4/0
4/0
1/0
1/0
1/0
1/0
250
MCM
250
MCM
250
MCM
250
MCM
1/0
1/0
1/0
1/0
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GMX X-RAY GENERATOR
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Line Disconnect to Power Module
Model
Power Ground
0 to 10m
GMX 325 RAD
GMX 525 RAD
2AWG
2AWG
2AWG
2AWG
GMX 625 RAD
GMX 825 RAD
2AWG
2AWG
1.4 WIRE SIZING, TO POWER MODULE
6AWG
6AWG
Model
Power
Transformer
Capacity
(kVA)
Main
Disconnect
Switch
GMX 325 RAD
GMX 525 RAD
GMX 625 RAD
40, 1Ø
50, 3Ø
65, 3Ø
100 Amp
100 Amp
100 Amp
GMX 825 RAD 80, 3Ø 100 Amp
1.5 WIRE SIZING TOLINE TRANSFORMER
Note : Line voltage variations must not exceed ± 10% from nominal voltage.
Note : Line voltage drop during X-Ray exposures must not exceed 10%.
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1.6 ELECTRICAL REQUIREMENTS, POWER ASSIST UNITS
Power assist Generators require 115 VAC, 20 Amps, supplied from a standard wall outlet or 220VAC, 30 Amp. The Power assist Line Voltage is configured by taping its input transformer (located in the Power Assist Chassis) to the appropriate Line Voltage. See page 22, this manual.
1.7 SAFETY DEVICES
•
Door safety switch : Prevents X-Ray exposures when the room door is open. Check local requirements.
•
X-Ray On lamp: Installed outside the X-Ray suite, (typically above the room door). Check local requirements.
Note: The GMX X-Ray Generator provides a switching function to activate the X-Ray On
Lamp, the lamp voltage is supplied by the customer.
Note : The GMX X-Ray Generator is not configured to supply any voltage or currents that may be required to interface other ancillary devices that may be installed with the X-Ray generator. Grounding and or load issues to the GMX circuits may result in faulty operation and function during X-Ray generation.
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2.1 INTRODUCTION
This chapter describes procedures used to install the GMX X-Ray Generator. The installation process will depend on Generator type and ancillary equipment configuration:
•
Check for transportation damage. Report shipping damage to the Freight Company or CMR X-Ray.
•
Check that supplied components and cables match what was ordered system.
NOTE: Power Assist Generator installation is covered in Appendix PA
2.2 TOOLS AND MATERIALS
Required tools and materials:
•
Hand tools. (Service Engineers Tool Kit)
•
Terminal Crimp Tool (Wire sizes 12 through 22)
•
Power Drill Motor, Drill Bit Index
•
Rotary Hammer, Concrete Bits
•
Extension cord.
•
Soldering iron, 60 Watts.
•
Silicone Insulating Grease – DC4 Vapor Proofing Compound or
Equivalent.
•
Degreasing/Cleaning agent.
•
Dielectric Oil.
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2.3 MEASUREMENT EQUIPMENT
•
Fluke 177 or equivalent digital multimeter.
•
Tektronix TDS 2002 or equivalent oscilloscope.
• mAs meter.
•
KVP Meter
•
Dose Meter
2.4 PRE-INSTALLATION CHECK
Prior to installation, inspect the site and verify that the X-Ray room complies with Preinstallation requirements:
Incoming Line, voltage and current capacity.
Main Switch and Safety Devices.
Conduit, size and location.
Space Requirements.
Note : Refer to Pre-Installation Chapter (1)
2.5 UNPACKING
TWO PEOPLE ARE REQUIRED FOR MOVEMENT AND PLACEMENT OF THE HV
TRANSFORMER AND POWER MODULE and/or POWER ASSIST.
IT’S HEAVY, DON’T RISK AN INJURY!
During the equipment unpacking, inspect all items for visible damage.
•
After unpacking, verify the following:
•
All items on the customer order are present.
•
All hardware and internal wiring is secure.
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2.6 POWER CABINET INSTALLATION / POWER ASSIST
TWO PEOPLE ARE REQUIRED FOR MOVEMENT AND PLACEMENT OF THE HV
TRANSFORMER AND POWER MODULE and/or POWER ASSIST.
IT’S HEAVY, DON’T RISK AN INJURY!
Power Cabinet Installation:
1. After unpacking, remove Power Module trim covers.
2. Remove the shipping screws that attach the Power Module to the pallet. Place the Power Module chassis near to its final position in the room. Two people are required for this operation.
3. Do not install HV Transformer wires, HV cables and covers until instructed to do so in this Manual.
4. Power Cabinet may be freestanding or located on a platform or shelf or bolted to the room floor.
2.7 OPERATOR CONSOLE INSTALLATION
1. Place the Operator Console at its final location.
2. Connect provided interconnect cable, the other end will terminate at the Power
Module.
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2.8 INTERFACE CONNECTIONS
The following drawings show the connections between the generator and peripherals, ie.: Table Bucky, Wall Bucky, Safety Lamp, Door
Switch, etc.
2.8.1 GENERATOR CONNECTIONS LEFT SIDE
2TS1
Rotor
AUX Voltages
See pp 14
2TS2
Digital
Interface
2TS3
Relay Board,
Bucky
Interface
See pp 17
2TS4
System
Connect
Jumper 4 and
10 to enable
Service Mode
See pp 18
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2.8.2 GENERATOR CONNECTIONS RIGHT SIDE
1TS1
Pre Charge
Functions &
ON/OFF
Functions
MAKE NO
CHANGES
F6, F7
ON/OFF
1TS2
T1 Primary
Tap
1TS3
Rotor Start &
Run Taps
Filament
Inverter Volts
Tap
FUSE
F8, 15A
Pre Charge
F9, 15A T1
F10, 15A RTR
Start
F11, 15A RTR
Run
F12, 15A
Filament
F14, 15A
Filament
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2.8.3 T1 VOLTAGE TAPS, ROTOR AND FILAMENT
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2.8.4 X-RAY TUBE STATOR CONNECTIONS
20702-85 Wall Bucky Suppl Cable.
Generator
Descriptio
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Table

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Color
Black
Red
White
Orange-Brown
Brown-Orange
Green-Yellow
Varian
Description
Main
Auxiliary
Common
Thermal switch
Thermal switch
Ground
Color
Black
Red
White
Yellow
Blue
Green-Yellow
TOSHIBA
Description
Main
Auxiliary
Common
Thermal switch
Thermal switch
Ground
Color
Black
Red
White
Blue
Blue
Green-Yellow
KAILLONG
Description
Main
Auxiliary
Common
Thermal switch
Thermal switch
Ground
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G
STATOR
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2.8.5 DIGITAL INTERFACE, 2TS2
Digital Interface
Used for Software based interfaces
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2.8.6 RELAY BOARD, BUCKY INTERFACE, 2TS3
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2.8.7 SYSTEM CONNECT, 2TS4
2TS4
Tie Point (Open)
1
Tie Point (Open)
2
Tie Point (Open)
3
4
*SERVICE MODE
Spare Interlock
5
6
7
**DOOR OPEN
*** X-Ray Tube
Thermo Switch
Tie Point (Open)
8
9
GND
GND
10
2
127 VAC and
Descriptio
*Jumper to GND for Service Mode
** Must be LOW for EXP
Through Door Switch or Jumper to GND
*** Must be LOW for EXP
Connects to Tube at 2TS1-5
2TS4
A3002-56-01
System Connect
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2.8.8T1 POWER MODULE AUX POWER
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2.8.9 T1 TAPS (ROTOR & FILAMENT) AND FUSES
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2.8.10 TS-1-1 POWER ASSIST TRANSFORMER INPUT
Generator
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Descriptio

GMX X-RAY GENERATOR
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)
The following procedure describes the initial configuration for the GMX
X-Ray Generator. Generator calibration follows in chapter 4.
In order to successfully complete configuration and calibration you must observe the following:
:
Computer, Laptop Windows 7 or higher
Service Interface Box, CMR part Number G4001-01, with USB cable.
Service Software (A4000-xx), CMR CD provided.
Software Driver, USB to UART bridge (silicon labs CP 2102 USB to
UART); available at Silicone Labs website
: http://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx
(also available on the CD provided with the CMR X-Ray Generator).
3.1 CONFIGURATION PROCEDURE
1.
Verify that the Mains Power breaker is Off; Generators with Power Assist (PA) verify that the PA power cord is disconnected.
3.
Connect the USB cable between your laptop computer and the Service Interface
Box.
4.
Connect the Generator to Operator Console cable (DB-15), from the Power Module front panel to the Service Interface Box.
5.
Place a jumper between 2TS4-4 and 2TS4-10 on the A3002-56-01 board located in the power module (see page 11 and page 18 in this manual). .
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6.
Turn the Mains wall breaker On, or connect the Power Assist unit to outlet power.
Turn the Generator On with the ON switch located on the Service Interface Box. Close the toggle switch on the PA unit.
7.
Insert the installation CD or flash drive into your PC.
8.
Open Folder A4000-13v4 , in that Folder find Folder ”Software”, copy and paste
9.
“Software” to “C” Drive
10.
Open A4000-13v4 found on the installation disk or flash drive
11.
Double click “ setup.exe
”, follow instructions, this will install the generator calibration program ion c:\Program Files (x86)\A4000-13
12.
On your PC, Click Windows “ Start ”
13.
Click on “ Control Panel ”
14.
Click on “ Device Manager ”
12.
Select “ Ports (COM & LPT)”, this will indicate which COM Port connects to the X-Ray Generator. Note and remember this number. If you don’t see a comport that is connected to the generator via the service box then you don’t have the UART bridge driver installed. Most of the time your computer will search for this driver and find it on the supplied CD. However if that does not work you must go online to the silicone labs website, this will allow your computer to download and install the correct USB two UART driver. This operation is extremely critical to the successful and functional application of the configuration and calibration features of this generator.
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12 COM Port #
13.
Run program A4000-13v4 , accessible fron Windows “ Start ” or “ Program
Files ” (x86)\A4000-13 . Or create a shortcut from “Program Files”
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15.
The next screen should look like this. Select the ON button .
14, ON
16.
You will see this window displayed for approximately 10 seconds
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17.
Next, the Main screen will display. Note: Status box reflecting possible problems or errors. Note: that various selections located at the bottom of this window.. Select
Configuration button .
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11, Configuration

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18.
In configuration mode, the following screen is visible.
System ID and System Ratings cannot be changed.
100 Amp Line Power is default it when 1 Tube Rad is selected
Rather than defining and repeating the selections on this screen, you as the installer should be able to configure and select the various functions presented.
If you have trouble recognizing these choices you may want to enlist a more experienced service engineer to help ( call a friend ).
The selection of the correct X-Ray Tube Type is extremely important.
20, Close
18, SAVE
19.
Once configuration selections have been made use the Save button to move these settings into Generator memory .
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During Configuration Save you will see this screen
©
21.
After saving the configuration settings , Select Close ,, the software will return to the Main screen. NOTE: If you are not moving to Calibration Mode, remove the
Service enable jumper on 2TS4 (see page 11 in this manual).
If you are proceeding to the Calibration Mode, select mA Calibration ,continue as follows.
20, mA Calibration
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4.1 TRUE-TRACK CALIBRATION WITH COMPUTER
TRUE-TRACK insures that X-Ray parameters calibrate to required specifications.
If you have just finished Configuration, connect your scope and start at step # 6, this chapter. If you are checking Calibration only, install the software and setup as per
Chapter 3.1 (pp 22 this manual), steps 1-13.
Connect scope Channel 1 to TP12 (mA test point) on the PWM A2002-46 board,
Set Amplitude: 500mV per division
Set .Time 5ms per division.
Use channel 1 trigger in normal mode.
Connect scope Channel 2 to TP3 (kV test point) on the PWM A2002-46 board,
Set Amplitude: 1V per division.
PULSE WIDTH MODULATOR A3002-85 TEST POINTS
TP3, kV Test Point, Chanel 1
TP12, mA Test Point, Chanel 2
TP 23, kV and mA signal common
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1.
Connect the USB cable between your laptop and the SERVICE BOX, connect the
Generator cable to the SERVICE BOX .
2.
Place a jumper between 2TS4-4 and 2TS4-10 on the A3002-56-01 board located in the power module (see page 11 in this manual).
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3.
Install the .exe file found in the A4000-13 folder. This software is compatible with
Windows XP and Windows 7.
4.
Turn the Mains breaker On
5.
Turn the Generator On with the ON switch located on the OPERATOR CONSOLE
SIMULATOR BOX
6.
From the Main screen, access Calibration mode.
7, Calibration
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7.
Calibration screen. Note the Status window, if any of these are highlighted you will not be able to make an exposure. Repair or reconfigure as needed to satisfy all parameters in the Status window.
16, Status
Window
8, Closed Loop.
True-Track
NOTE: When True Track is selected the software will default to the starting technique setting, 80 kV, 10 mA, at 40 ms
8.
Insure that Closed Loop and True-Track are selected.
9.
To start (10 mA at 80 kV) make sure that the Filament Demand set point is at least
2200 but not greater than 2400 (for most x-ray tubes). Note: Filament Demand
Limit and starting Set Point are set relative to the X-Ray Tube selected during
Configuration.
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10.
With a Hand switch connected to the service box make an exposure, the
Filament Demand number will change.
11.
Continue to hold exposure switch, X-Ray exposures will automatically continue, until a green highligh t annotated with Calibration successful appears
12.
Release the Expose and Prep switch, Note the WAIT indication in the STATUS Box,
You must wait for the indicator to change to “ Ready to expose ” before continuing with the next mA Calibration. True-Track automatically saves the data and advances to the next station.
13.
Continue to initiate the exposure switch until the next station is calibrated.
14.
Repeat until all mA stations are calibrated.
15.
A green indication of Cal complete will present when each station is calibrated.
12, WAIT
Will Change to
“ Ready to expose ”
16, OFF
10, Filament Demand
16.
When all mA stations are Calibrated, Select OFF.
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Note: to recalibrate a specific mA station select the MA value and select 80 kVA , initiate the calibration process, after the 45 kVA station is calibrated you must manually select the 125 kV station and then initiate the Cal process.
4.2 TYPICAL MA AND KV WAVE FORMS
80 kV
10 mA
80 kV
100 mA
80 kV
300 mA
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You have just installed the Medical Imaging industry’s most cost effective High Performance High Frequency X-Ray
Generator.
Thanks’ for your wise choice.
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5.1 INTRODUCTION
The generator includes self-diagnostic routines to facilitate troubleshooting. When in the unlikely event there is an error, the
Operator console displays an error code. This chapter lists the errors, with corresponding corrective actions.
5.2 SERVICE RECOMMENDATIONS
CAUTION: This X-Ray Generator has components that maybe damaged by electrostatic discharges (ESD). Use ESD precautions when working with the printed circuit boards.
WARNING THE HIGH VOLTAGE INVERTER CAPACITORS RETAIN A
LARGE PORTION OF CHARGE FOR APPROXIMATELY 2 MINUTES
AFTER THE UNIT IS TURNED OFF. Auto-DISCHARGE CIRCUITS ARE
IN PLACE BUT ALWAYS CHECK FOR BUS VOLTAGE WHEN WORKING
IN THIS AREA.
When making exposures during service activities, be mindful of the expected path of the primary X-ray beam. Keep all parts of your body outside of this path. Exposure to X ray radiation may be harmful, care must be taken to avoid direct exposure to the primary X Ray beam.
Always Collimate the x-ray beam to as small an area as possible
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Do not defeat or override any safety features on the GMX X-Ray generator.
Note: In the unlikely event of a blown fuse: To insure the continued protection against fire replace uses only with the same type and ratings as supplied and specified by CMR X-Ray.
After service, insure that all protective panels and covers are in place.
5.3 ERROR CODES
Error codes, provided for troubleshooting. There are two categories (1) recoverable and (2) non-recoverable. A recoverable error prevents exposures until the conditions generating the Fault have been repaired, does not require a Generator restart. A non-recoverable error requires the Generator to be repaired and restarted.
For the Basic RAD Console, the lamp of the selected function key will flash. When that key is pressed, the kV indicator displays the error code. To check if more than one error occurred, keep the function key pressed and simultaneously press one of the kV keys.
For the Touch Screen Console, Error/Fault Codes display on the
Operator Counsel using text, not numbers.
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5.3.1 ERROR CODE DESCRIPTIONS
Non-Recoverable Errors, Requires repair and Restart
E47
E49
E52
E53
E56
E57
E58
E02
E07
E10
E19
E27
E36
E38
E39
E44
E46
Battery Fault (Battery Systems Only)
X-Ray Tube Thermal Switch Fault.
Bucky Signal Fault
Rotor Signal Fault
Communication Fault (Console to Power Module)
Inverter Bus Voltage Low
IPM Fault
Filament Fault
Console Pushbuttons activated during Power UP
Microprocessor Battery Fault
Tube Data Fault mA Station Not Calibrated kV Unbalanced
Checksum Error, Flash Memory
AEC No Calibration Data
High Speed Rotor Fault
Microprocessor Not Initialized
Recoverable Error, Re-Start Not Required
E18
E29
E32
E33
E51
E51
X-Ray Room Door Open
Exposure Back Up Time
Selected AEC Technique greater than 650 mAs
Selected Technique Exceeds Available Heat Units
Pre-Charge Error
Exposure Hand switch released before End of Exposure
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6.1 POWER MODULE
Low Voltage
Distribution A3002-75-
Low Voltage Power
Supplies 20500-00,24,25
IPM
Line Fuses
Filament Driver
A3002-79-01
Low Speed Rotor
Control A3002-84-02
(CONT. Next Page)
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HV Transformer
Contactors,
Line & Pre
Charge
Inverter Module

Digital I/O
A3002-74-01
Micro Controller
A3002-80-04
Analog I/O
A3002-28-03
Pulse Width Modulator
A3002-85-02
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6.2LINE INVERTER
Assembly Number:
A1003-40-00, Inverter Module, 1 Phase 240 VAC
A1003-41-00, Inverter Module, 3 Phase 240 VAC
A1003-43-00, Inverter Module, 3 Phase 480 VAC
IPM Driver
A3002-93-01
IPM
21105-06 30 kW
21105-10 50 kW
21105-07 80 kW
Snubber Caps
30932-1MF
20932-2MF
Input Filter/Charge
Monitor
A3002-88-01 (240V 1P)
A3002-89-01 (240V 3P)
A3002-91-01 (480V 3P)
Capacitor, 4 each
20931-3700MF
(Not Visible)
Resistor, Pre- Charge
20822-25E 30 kW
20822-100E 80 kW
Pre-Charge
Contactor
20304-00
Line
Contactor
20304-00
40
Line Fuses
20310-02
Line Rectifiers,
(2 or 3 each)
21100-24
(Not Visible)
240 VAC Fuses
(480V 3P Only)

GMX X-RAY GENERATOR
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7.1 INTRODUCTION
This chapter defines the tests used to ensure that the calibrated operation of this equipment meets performance requirements set by the FDA in 21CFR, Sub Chapter J. Make these checks after installation calibration or any maintenance that would affect Generator calibration.
7.2 PRELIMINARY TESTING
These procedures confirm the operation and calibration of the generator.
1.
Turn the generator ON and note the operator console startup routine. The control console indicators will display the last mA, kV, and time
2.
Change the technique factors and verify they are updating relative to operator input.
3.
Press the prep pushbutton and make sure the X-Ray tube rotor is turning and the Ready Lamp illuminates.
4.
Release the prep pushbutton and make sure the prep lamp turns off and the X-Ray Tube rotor is no longer powered.
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7.3 X-RAY TIME MEASUREMENT
Test Equipment
Oscilloscope.
Method
Connect the oscilloscope at test point TP3 (KV test point), on the PWM board.
Acceptance Limit
Set time
1ms at 5s
Acceptance limit
+/- (1%+0.1ms)
Procedure
1.
Make an exposure at 80kV, 100mA, using the exposure times specified in table 6.1.
2.
Measure the exposure time with oscilloscope.
3.
Record the measurement information in form 6 Time
Measurement (chapter 5, in this manual).
The measured results must be within the indicated limits, see table 6.1.
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Exposure time
(s)
0.001
0.005
0.010
0.025
0.100
Limits
(s)
0.00089-0.00111
0.00485-0.00515
0.00980-0.01020
0.02465-0.02535
0.09890-0.10110
0.200
0.500
1.000
2.000
0.19790-0.20210
0.49490-0.50510
0.98990-1.01010
1.97990-2.02010
4.000
5.000
3.95990-4.04010
4.94990-5.05010
Table 6.1 Time Measurements.
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7.8 KV/MA X-RAY MEASUREMENT
Test Equipment
•
Non-invasive kV meter.
• mAs meter.
Method
Acceptance Limits
•
Connect the kV meter as indicated by the manufacturer.
•
Connect the mAs meter to the red and black test terminals located on the high-voltage transformer.
Factor Acceptance limit kV mA
+/- (5% of kV + 1 kV)
+/- (5% of mA + 1 mA)
Table 6.2 kV and mA Measurements.
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Procedure
1.
Select 50kV, 100ms and the lowest station in the set scale.
2.
Make an exposure and record the measured values in Form
7 or Form 8 (Chapter 5, in this manual).
3.
Select 80kV, 100ms
4.
Make an exposure and record the readings for kV/mA in form 7 or 8, as applicable.
5.
Select 120kV, 100ms
6.
Make an exposure and record the readings for kV/mA in
Form 7 or 8, as applicable.
7.
Repeat until you are finished with the mA values and record in Form
7 or 8, as applicable.
Note: Observe X-Ray Tube rating limitations during this procedure
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GMX X-RAY GENERATOR
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7.8 LINEARITY
Test Equipment
•
Dosemeter.
•
Handheld Calculator.
• mAs meter.
•
Aluminum Filter.
Method
•
Place the X-ray tube at a focus-film distance of 100cm (40”).
•
Place the dosemeter in the middle of the radiation field and a distance of 50cm (20”) from tube focal point.
•
Adjust the collimator as per the size of the radiation area.
•
Place an aluminum filter over the image reception to minimize
“secondary radiation”.
•
Connect the mAs meter in the red and black terminals aon the high-voltage transformer. Remove the shorting link located between the red and black terminals.
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GMX X-RAY GENERATOR
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Linearity (Continued)
Specifications
The linearity coefficient (CL) or difference between two radiation averages and the mAs obtained for an two consecutive readings of the tube current, must not exceed 0.1 times the sum.
That is: CL = (
___
X
1
−
___
X
2
) ≤ 0 .
1 (
___
X
1
−
___
X
2
)
Where values.
___
X
1
and
___
X
2
are the mR/mAs averages obtained from two consecutive tube current
Procedure
Select 80kV, 200mA, and 100ms. Perform a series of 5 exposures and record them in form
9 Linearity (chapter 5, in this manual).
Select 80kV, 250mA y 100ms. Perform a series of 5 exposures and record them in form 9
Linearity (chapter 5, in this manual).
Estimate the generator linearity with the data from the table and test its linear behavior.
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7.8 REPEATABILITY
Test Equipment
Dosemeter.
Calculator.
Aluminum filter.
Method
Place the X-ray tube at focus-film distance of 100cm (40”).
Place the dosemeter in the middle of the radiation field and at a 50cm (20”) distance from tube focal point.
Adjust the collimator based on the size of the radiation area.
Place an aluminum filter over the image reception to minimize “secondary radiation”.
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GMX X-RAY GENERATOR
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Specifications
The radiation coefficient of variability (CV) must not exceed 0.05 for any specific combination of technical factors.
That is:
CV = s mR
Where:
CV = Coefficient of variability. s = The simple standard deviation (
σ
(n-1)) or the square root of the differences and the square of the total of 5 exposures divided by 4(n-1). mR = Is the average doses for 5 exposures.
Procedure
Select 80kV, 100mA, and 200ms.
Perform a series of 5 exposures and record the results in Form 10 Repeatability (Chapter
5, in this manual), for estimating the Repeatability. Repeatability must have a coefficient less than 0.05.
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The Optional CMR Power Assist allows CMR X-Ray Generators to operate from 115VAC, 20
Amp outlets. Once installed mimimal Service or Operator interaction is required. Power outages will necessitate the Operator to push the Reset Push Button when power is restored.
POWER ASSIST MODULE
POWER ASSIST INVERTER, LOCATED IN POWER MODULE
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GMX X-RAY GENERATOR
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Service Switch
POWER ASSIST SERVICE SWITCH
Located under the front cover of the Power Assist module. When Closed (Down Toggle) the Service Switch, will discharge the capacitor banks. Discharge may take up to 20 minutes,
SWITCH, Push to reset PA Module
SWITCH, UP
Position (ON), enables PA function
SWITCH, UP
Position (ON), enables power to
Generator Power
Module
LAMP, Indicates a
Charge on PA Bus
POWER ASSIST CONTROL PANEL
LAMP, indicates
Reset pushbutton must be activated
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LAMP, Indicates PA
Module is connected to power

GMX X-RAY GENERATOR
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Selected mA
Linear
Scale
10
15
20
25
30
35
40
50
75
100
150
200
250
Voltage at TP 12,
PWM
1.0
1.5
2.0
2.5
0.75
0.875
1.0
300
350
400
500
600
700
1.5
1.75
800 2.0
Linear mA Scale
1.25
0.75
1.0
1.5
2.0
2.5
0.75
0.875
1.0
1.25
I
Note: See page 11 for Test Point locations
Selected mA
Renard
Scale
8
10
12.5
16
20
25
32
40
Voltage at TP 12,
PWM
50
64
80
100
125
160
200
250
320
400
2.5
0.80
1.0
500
640
1.25
1.6
800 2.0
Renard mA Scale
0.81
1.0
1.25
1.6
2.0
2.5
0.80
1.0
1.25
1.6
0.8
1.0
1.25
1.6
2.0
Selected
KV
Voltage at TP 12
PWM
40 50 60 70 80 90 100 110 120 130 140 150
1.33 1.66 2.00 2.33 2.66 3.00 3.33 3.66 4.00 4.33 4.66 5.00
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If required, remove old insulating grease from cable ends and receptacles.
Clean cable ends and receptacles with a hydrocarbon cleaning solvent. Avoid touching the cleaned areas with your hand to avoid leaving perspiration or skin oil on the insulating surfaces.
Inspect cable ends and cables for evidence of arching, carbon tracking, burnt or pitted areas, and/cracked conditions. If any of these conditions cannot be cleaned it may be necessary to replace the cable or receptacle.
Insure that the cable ends have a rubber sealing-ring and that the rubber ring is correctly positioned and clean.
At the HV transformer, insulating oil (Shell Diala X or equivalent) may be used in the HV receptacles to provide insulation and vapor displacement. After cleaning, insert approximately ¼ inch of oil in the receptacle. Insert the cable(s) and tighten the spanner ring.
At the X-Ray Tube, apply a fresh layer of insulating grease to the cable ends. Use a wooden or plastic spatula to apply the grease, avoid using fingers. On the side of the cable ends apply a 1 to 2mm layer of grease. At the cable end cover the cable pins with insulating grease. Insert the cable(s) and tighten the spanner ring. NOTE: after the X-
Ray Tube has been heated recheck the tightness of the spanner ring; during the thermal cycling of the X-Ray tube the grease has melted and repositioned, causing the cable to loosen
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END OF DOCUMENT
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