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To set the leakage limit follow the steps below:
1.
Connect the HT-S to a correctly rated source of supply and turn the power switch to the I or ON
position. Push the
RESET
button. The yellow
TEST
indicator should light, indicating that the
HT-S is ready to test.
2.
Use the AC/DC button to select the type of output voltage (Only HT-30000S and HT-4200S).
3.
On the rear panel turn the
Leakage Limit
potentiometer, as soon as the potentiometer starts
turning, the meter will start blinking, and it will show “L” with the new excess leakage limit set in
the scale of mA with increments 0.1 mA.
Adjustment of High Voltage Ramp Time
1.
This procedure controls the amount of time used to ramp the high voltage to the required level.
The factory setting of two seconds is adequate for most situations. Use this procedure if
adjustment to a different ramp time within the range of 1 to 5 seconds is required.
2.
Turn the
Ground Check
switch on the rear panel to the Off position.
3.
Connect the HT-S to a correctly rated source of supply and turn the power switch to the I or ON
position. Push the
RESET
button. The yellow
TEST
indicator should light, indicating that the
HT-S is ready to test.
4.
Make sure there are no test leads connected to the HT-S. Push the
TEST
button.
5.
When the
TEST
button is pressed, the voltage will ramp and hold. Adjust the
Ramp Time
control on the rear panel until the desired ramp time is reached. The test can be terminated at any
time by pressing the
RESET
button.
6.
Check the position of the
Ground Check
switch before testing.
Setting the Ground Check Switch
This switch controls whether the Ground Continuity Test is conducted between the chassis and the
power supply cord grounding pin of the unit being tested. The safety agencies require that this test be
conducted on all equipment using a three-wire power supply cord. For other types of equipment, such as
some portable lamps and all double-insulated equipment, there are only two wires in the power supply cord
and the ground continuity check is waived by the safety agencies.
If the power supply cord of the equipment being tested has only two pins, the
Ground Check
switch should be set to the Off position. When the
Ground Check
switch is turned Off, both the green
Ground OK
and red
Ground Open
LED's on the front panel are lit as a reminder to the operator that the
ground continuity test is not being conducted.
If the power supply cord of the equipment being tested has three pins, the
Ground Check
switch
should be set to the On position.
When testing with the
Ground Check
switch Off, the operator must ensure that the
Return
lead
is properly connected to exposed dead metal of the equipment being tested for safety and to ensure that the
HT-S properly reports all failures.
The small size of the
Ground Check
switch will allow a calibration-type adhesive label to be
placed over it to allow for tamper-proof operation.
Adjustment of the Ground Continuity Limit
To set the ground continuity limit follow the steps below:
