BERTHOLD TECHNOLOGIES LB4710-080 - Chapter 7. Service; Troubleshooting Table

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