OPERATING MANUAL CD 2000
Palas
®
GmbH, Karlsruhe, Version V002022014
For example, the standard setting for the current limiting at 20 µA (which means 0.2 V on
the monitor output) is now at 20 scales.
3) Adjustment procedure
- Regulate Adjusting potentiometer for voltage down entirely
- turn current adjusting potentiometer to a high value (200 scales)
- now increase the output voltage by turning the potentimeter for Upos upwards and look
for the monitoring value for the current on the digital voltmeter.
For standard setting: As soon as the monitoring value reaches 0.2V (corresponds to 20µA),
increase the scales of the Upos-potentiometer by 200 scales.
Then turn down the Ipos-potentiometer to 20 scales.
Now the setting for the positive high voltage is adjusted. The digital voltmeter should show
now around 0.2V as monitoring value.
When measuring the monitoring value for Umon, the voltage seen there is lower than
adjusted with the Upos-potentiometer because the HV-supply now works with current-
limiting and therefore decreases the output voltage.
The negative output is adjusted in the same way as the positive output:
- preset potentiometers for Uneg and Ineg
- connect voltmeter
- increase Uneg and look for Ineg: increase Uneg by 250 scales when reaching the 0.2V on
voltmeter
- set potentiometer for Ineg to 20 scales.
Caution! In order to keep the values given by the EMC-directive, the current should be so
low that no sparking takes place. This will be correct as long as the current is kept
at 20 A or less.
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