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Mirion Technologies GEM-5 User Manual

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Chapter 6 Diagnostics/Maintenance
230
Table 15 Troubleshooting Guide
Fault Error Possible Causes Fix
Live Time error
1. Extremely high count
rate
2. Time counter failure
If LT = T DT is < 0
then error
Check source of
extremely high count
rate; detector light
leak, PMT, preamp
Check computer
Check Carrier Board
Detector contaminated
Large Background
increase
Contamination left
on detector or on
detector covering
Clean detector
Clean detector
coverings
High Bkgnd Rate
Background rate set
Maximum Monitor
Time too low
Scintillator light
seal failure
Contamination on
detector
High radiation
field
Excessive noise
Check all setup
values
Repair detector light
seal
Clean detector
Shield or relocate
monitor
Check discriminator
plot
Adjust discriminator
level
Replace detector or
Detector Board
Carrier Board Fault Failed board Replace Carrier Board
Sensor Board Fault
Failed board
Detector Interface
bus incomplete
Replace Sensor
Board
Replace ribbon cable
Scanning a badge has
no effect
Unable to go from
READY mode to
POSITION mode
Input device on the
monitor is not
working.
Set Badge Reader
Enabled to “NO”
Service input device;
replace if necessary

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Mirion Technologies GEM-5 Specifications

General IconGeneral
BrandMirion Technologies
ModelGEM-5
CategoryMonitor
LanguageEnglish

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