24
Display Setting Limits for Leakage, Time and Ground Continuity
To view the Test Duration, Leakage limit and Ground Continuity limit, hold down the
RESET
button for 2 seconds, then, the meter will display “L” with the Leakage Limit value in mA. Hold down the
RESET
button again for 2 seconds and the meter will display “d” with the Test Duration set time in
seconds. Hold down the RESET button again and the meter will display “r” with the Ground Continuity
limit in
Ω
. Hold down the RESET button again for 2 seconds to start over showing the Leakage Limit
value, see Figure 5.
Figure 5. HT-S Test Settings
Adjustment of the High Voltage Level
This procedure controls the high voltage level used in the dielectric withstand test. It is specified
by safety agency personnel. Most safety agencies will allow a shorter test (usually 1 sec. vs. 1 min.) if the
voltage is increased by 20%. The HT-S is factory set for 1200 volts AC or 1700 DC, a voltage level used
for the one second test for many types of equipment. Consult the safety agencies for the required voltage
level for the type of equipment being tested. If a different voltage level is required, use this procedure to
set it.
a.
Disconnect all leads of the HT-S front panel.
b.
Turn the
Ground Check
switch on the rear panel to the Off position.
c.
Set the Test Time to at least 30 seconds, use the procedure
of the High Voltage Test Time
.
d.
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.
e.
Use the AC/DC button to select the type of output voltage (Only HT-3000S and HT-4200S).
f.
After the
TEST
button is pressed, the voltage will ramp and hold. Using a driver set the
Voltage
Adjust
control on the rear panel to the desired voltage.
g.
If tamperproof operation is desired, we suggest placing a calibration-style label over the voltage
adjust hole.
h.
Check the position of the
Ground Check
Switch, and adjust the test time to the desired value
using the procedure
of the High Voltage Test Time
.
Adjustment of the High Voltage Test Time
This procedure sets the length of time the HT-S
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 HT-S is factory set for 2
seconds. Consult the safety agencies for the test time for the type of equipment being tested. If a different
test time is required, use this procedure to set it.
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. On the rear panel turn the
Test Time
potentiometer, as soon as the potentiometer starts
turning, the meter will display “d” and the value can be set in 1 second increments from 1 to 60 seconds.
Adjustment of the Leakage Current Level
