BERTHOLD TECHNOLOGIES LB 480, User Manual

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54733-10BA2L
3 – 364
02.2017
Menu Structure Volume 3
2.36
PMT
Menu path: Device Config

Setup

Service

PMT .
This menu allows the qualification of the photomultiplier (PMT) after
consultation with BERTHOLD TECHNOLOGIES. Increased current
values at the multiplier indicate a strong radiation levels (caused,
for example, by weld testing), or a defect at the PMT, or the HV con-
trol.
1 Active Detector No.
Choose the detector for which you want to display the PMT values.
• Detector No. = 0 shows the PMT values of the master detec-
tor.
• Detector No. = 1 shows the PMT values of slave 1.
• etc.
2 HV Live
Displays the current HV (high voltage) at the photomultiplier. If HV
Mode is set to AUTO (normal operation), the values in HV Live
must change, viewed over several seconds.
3 HV Feedback
Display of the read back HV value which is actually present at the
multiplier. The display is used to control the HV.
4 Meas CH CPS
Count rate in the measuring channel.
5 Control CH CPS
Count rate in the control channel.
6 Auxiliary CH CPS
Count rate in the auxiliary channel.
7 PMT Current
Displays the current anode current.
8 PMT Current Max
Display of the stored maximum value for the multiplier tube current
(
PMT Current ).
9 Reset Current Extrema
Clears the maximum value of the multiplier tube current ( PMT
Current Max ).