page 14 of 14
7
calibration (cont’d)
7.3.3 negative output calibration
1. With the high voltage off, adjust the front panel HV control to about 100 V.
2. Set the high voltage polarity to negative using the polarity button.
3. Connect the calibration equipment to the rear panel negative High Voltage output as
shown in the Setup section.
4. Using an appropriately sized tool press the calibration button which is accessed through
a hole in the right hand side of the HV Supply. The HVLAB3000 will enter calibration
mode, the Cal LED will light and the first calibration voltage will be automatically set.
Use the front panel HV control to adjust the front panel voltage display to agree with the
volt meter reading.
5. Press the calibration button. The HVLAB3000 will now show its current reading. Use the
front panel HV control to adjust the HVLAB3000 current display to agree with the
milli-amp meter reading.
6. Press the calibration button. The HVLAB3000 will set a voltage as shown on the front
panel voltage display. Use the front panel HV control to adjust the actual output voltage,
shown on the volt meter, until it agrees with the front panel display.
7. Press the calibration button. The next calibration voltage will be set. Repeat steps 4, 5
and 6 for each calibration voltage. The last calibration voltage is about 3100 V.
8. Press the calibration button. The HVLAB3000 will save the calibration factors in
internal memory and exit calibration mode. The Cal LED and the high voltage will switch
off.
9. Switch the high voltage on and check the HVLAB3000 voltage and current readings
agree with the volt meter and the milli-amp meter at various voltages in the range.
10.End of negative calibration.
Note: You may exit the calibration mode at any time by pressing the High Voltage On
button. The HVLAB3000 will exit calibration mode, the Cal LED will go out, the high voltage
will switch off but the previous calibration will be lost and default factors set. To exit the
calibration and save the previous calibration factors switch off the HVLAB3000 while still in
calibration mode. The new calibration factors are only saved at the end of the calibration
procedure.
