11
4.
Set the Failure Shutdown Switch to ON.
5.
Push the RESET button, then the TEST button.
6.
The FULL VOLTAGE indicator will light. The time from when the TEST button is pushed
to when the FULL VOLTAGE indicator lights is the Ramp Time. Set the Ramp Time
Potentiometer to change the ramp time. Repeat until the desired Ramp Time is set.
Voltage Adjust
This procedure controls the high voltage level used in the dielectric withstand test. The
HT-20KVPac is factory set for minimum voltage as shipped from the factory. Use the procedure
below to set it.
1.
Make sure there are no leads connected to the tester.
2.
Set the Voltage Ramp Switch to ON.
3.
Set the Test Timer Switch to DEFEAT.
4.
Set the Failure Shutdown Switch to ON.
5.
Turn the Voltage Adjust knob to minimum (counterclock wise)
6.
Push the RESET button.
7.
Push and hold the TEST button. Voltage will be supplied while the TEST button is pressed.
8.
After the FULL VOLTAGE indicator lights, use the Voltage Adjust knob to set the desired
output.
9.
Release the TEST button to terminate the test.
High Voltage Test Time Adjust
This procedure sets the length of time the HT-20KVPac will conduct the high voltage test.
The test time is specified by the safety agencies, and is tied to the test voltage. Most safety
agencies will allow a much shorter test (usually 1 second vs. 1 minute) if the voltage is increased
by 20%. The factory set is for 1 second. Consult the safety agencies on the test time for the type
of equipment being tested. If a different test time is required, use this procedure to set it.
1. Connect the tester to a correctly rated source of supply and turn ON the power switch.
2. Push the
RESET
button. The
TEST
indicator should light, indicating that the HT-20KVPac
is ready.
3. Adjust the
Test Time
potentiometer. As soon as the potentiometer starts turning, the voltage
meter will display “d” with the new value. Test Time can be set in 1 second increments from
1 to 60 seconds.
Setting the Voltage Ramp Switch
When this switch is in the DEFEAT position, the voltage will immediately rise to the
level set by the Voltage Adjust knob. The Ramp Control setting is ignored.
When this switch is in the ON position, the voltage ramps according to the setting of the
Ramp Potentiometer. See adjustment instructions above. The Voltage Ramp Switch must be
defeated if Shutdown Limit Defeat is desired. See Table 4-3 for details.
Setting the Test Timer Switch
