14
1.
Determine the proper voltage meter setting
for the desired leakage current level, using
the formula:
Voltage=(Leakage Current in mA)X(120).
Example: A 5 mA current level is desired.
The voltage needed is:
(5mA)X(120)=600 volts.
2.
Turn the Ground Check switch on the rear
panel Off.
3.
Connect the HT-2800 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 Tester is
ready to test.
4.
Adjust the
Test Time
control to
approximately the middle of its travel.
5.
Make sure there are no test leads
connected to the Tester. Push the
TEST
button.
6.
The voltage will ramp and hold after
approximately one second. Using the front
panel meter, set the
Voltage Adjust
control
to the value determined in 1. above. After
the voltage value has been set, the test can
be stopped by pressing the
RESET
button.
7.
Turn the
Leakage Limit
control on the rear
panel to its maximum clockwise position.
8.
Connect test leads to the return and the
special power supply cord to the High
Voltage Device receptacle. Connect the
test lead and the clip on the special power
supply cord across the 120kohm resistor
on the rear panel. Make sure neither clip
touches the chassis of the HT-2800.
9.
Push the red
RESET
Button and then the
yellow
TEST
Button. First, make a coarse
adjustment by waiting until the
Full
Voltage
LED lights. Turn down the
Leakage Limit
control on the rear panel
until the buzzer sounds and the
Excess
Leakage
LED lights. Repeat step 9 until
the exact setting is reached. The exact
setting is the minimum possible setting of
the
Leakage Limit
control which still
allows the Tester to reach full voltage and
light the
Full Voltage
LED. If the red
Excess Leakage
LED lights, the
adjustment is set too low. Turn the
Leakage Limit
control up slightly and
repeat Step 9 until the correct setting is
achieved.
10.
If tamperproof settings are desired, the
Leakage Limit
control shaft may be pulled
away with a slight tug. (It may be
reinserted for future adjustments.)
11.
Remove the special power supply cord and
supplied test lead from the front panel.
Check the position of the
Ground Check
switch. After this procedure, the high
voltage level is to be reset using the
procedure
Adjustment of the High Voltage
Level
, and the test time is to be reset using
the procedure
Adjustment of the High
Voltage Test Time
.
Adjustment of the High Voltage
Ramp Time
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 <1-5 seconds is required.
1.
Defeat the
Ground Check
by turning the
rear panel switch Off.
2.
Connect the HT-2800 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 Tester is
ready to test.
3.
Make sure there are no test leads
connected to the Tester. Push the
TEST
button.
4.
When the
TEST
button is pressed, the
voltage will ramp and hold. Adjust the
ramp 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.
5.
If tamperproof settings are desired, the
adjustment shaft may be pulled away with
a slight tug. (It may be reinserted for
future adjustments.)
6.
Check the position of the Ground Check
switch before testing.
Adjustment of the High Voltage
Level
This procedure controls the high voltage level
used in the dielectric withstand test. It is