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).
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