BERTHOLD TECHNOLOGIES LB 480, Руководство пользователя

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Menu Structure Volume 3
9 HV Default
HV Default causes:
– A quick operation point control after power failure
After a power failure, the HV starts at the last HV Average value
which results from the HV Default. This will significantly reduce
the start-up phase after power failure.
– Error detection in case of HV-drift
If the HV deviates too far (+40%, -20%) from the HV Default
or if the HV reaches the limits of the range of 300 V or 1300 V,
this is reported as an error.
– Special feature: 0V
For maintenance purposes, the HV Default can also be set to
0V. In this case, the mechanisms described above are sus-
pended; after a power failure, the measurement begins to get
adjusted at 800 V.
HV Default has already been determined and set by BERTHOLD
TECHNOLOGIES. If this value deviates during the first commission-
ing by more than 5% from HV Live , then you have to adjust HV
Default new.

Set HV Default to 0.

Read off the value in HV Live 30 minutes later.

Enter the value read in HV-Default .
With the CrystalSENS, please note that the count rate during this
process is above 300 cps to allow the HV to adjust itself.
Tip
The operating point in new detectors is usually between 400 to 900
V. If you get a different value, please contact BERTHOLD
TECHNOLOGIES or your local representative.
10 Cps Single Detector
Shows the count rate of the active detector normalized to one sec-
ond.