11.4 Evaluation Unit LB 442
96
HV Settings
Set detector HV
With the standard setting ”0” the detector works with automatic
high voltage control. For service purposes, you can enter a high
voltage value between 500 V and 1500 V. In this case, the high
voltage control is disabled. The voltage control applied at the pho-
tomultiplier then corresponds to the entered value.
For the regular measurement mode you have to enter 0.
Save default
Here you can enter a high voltage start value. This allows rapid
control of the HV to the optimum operation point after power out-
age. The value can lie between 500 V and 1500 V.
Read default
The start value of the high voltage stored in the detector is dis-
played here.
Status request
o Temp.PT100
The PT 100 temperature is displayed.
o NTC-Temp.
The temperature in the detector is displayed.
o Pulses
The current count rate of the detector is displayed.
o HV
The currently set high voltage is displayed
Reset Detector
A reset on the detector CPU can be carried out.
Pt 100 Adjust
With a 100 Ohm resistance at terminals 3/4 of the detector, the
PT100 input can be adjusted with the button combination "sk2 &
clear".
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