4-1
SECTION 4: OPERATING INSTRUCTIONS
1. Ensure proper electrical set-up has been performed.
2. Check that the Voltage Control dial is set to "0" (Zero Start position).
3. Select the proper voltmeter range, currentmeter range, and current trip setting.
High Voltage Applied
4. Turn on the Control Main Power switch. The Power On lamp will illuminate.
5. Momentarily press the HV On pushbutton. The high voltage will be applied to the cable and the HV On
switch lamp will illuminate. (Zero Start and External Interlock Loop conditions must be met, and Reset
lamp must be extinguished.
6. With HV On, rotate the Voltage Control dial and watch the Output Voltmeter and Output Currentmeter
until desired levels are reached.
Note: When testing samples that are largely capacitive in nature, it may be necessary to place
currentmeter range switch in the 20mA position. Operator must then slowly raise output watching the
currentmeter and allowing the test sample to "charge up".
7. Record data, if desired, and lower the Voltage Control to Zero after testing is completed. Use Discharge
or Grounding stick to discharge specimen or allow voltage to return to zero. Press HV Off button; high
voltage will be shut off and the HV (On) switch lamp will extinguish and the High Voltage Off/Ready lamp
will illuminate.
Overcurrent Failure
8. If an overcurrent situation occurs (output current exceeds Overcurrent Trip setpoint), the over-current
relay will activate, de-energizing the test set (High Voltage Off). To regain high voltage the Reset button
must be depressed and, the Voltage Control dial must be returned to zero. Press the HV On button
momentarily to turn High Voltage back on.
9. After all testing is completed; turn off the front panel Main Power switch. Remove the input power cable
from the facility power input.
10. CAUTION: Make certain that the test specimen is totally discharged and grounded before
removing test cables.
WARNING:
This equipment should only be operated by personnel familiar with high voltage testing and safety
procedures. Improper operation may result in injury or death and can cause damage to the unit or
test object.
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