BERTHOLD TECHNOLOGIES LB4710-050, User Manual

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Chapter 7 Service
Mini-Switch LB 471
71
Chapter 7. Service
7.1
Troubleshooting Table
Problem Cause Remedy
No display No power supply Check power line
Check fuse
Display
not reada-
ble
Processor error Observe error code
Perform reset:
For a ”Total Reset”, keep
the
Clear button pushed
down while you turn on the
power supply.
Replace evaluation unit
Count rate
too low Shielding not open
or not properly
open
Check shutter and lock it in
position OPEN
Incorrect alignment
of useful radiation
towards detector
Correct and optimized
alignment
Container installa-
tions in radiation
path
Offset irradiation level
Wall deposits in
container Remove wall deposits
Source has reached
the end of its ser-
vice life Replace source
Display
varies too
much Time constant too
small Increase time constant
Count rate too low Check source age and
irradiation level. Replace
detector
Detector stabiliza-
tion faulty
Replace detector
Display
drifts Wall deposits on the
container wall Carry out new empty
calibration
Photomultiplier
faulty
Replace photomultiplier