4
It is imperative that a good ground be provided to the HT-PR. Before connecting the HT-PR,
ensure that a low-resistance ground is provided by the building wiring. If the HT-PR is used on a
high-resistance grounding circuit, dangerous high voltages may be present to the operator. In
addition, the power to the Testing Area should be provided with an easily reached shutoff switch
which can be actuated by personnel outside the Area if needed.
Safety Techniques
The high voltage circuit of the HT-PR can be shut off at any time by pressing the
RESET
button.
The HT-PR has been provided with a Reset switch to provide an unarmed "Standby" setting
when it is energized, but idle. When the red
RESET
button is lit the tester will not provide high
voltage until the
RESET
button and the
TEST
button have been pressed in order. To prevent
inadvertent operation, the operator should be instructed not to press the
RESET
button until the
test is finish.
The HT-PR is equipped with a Ground Continuity Check which will not allow high voltage to be
applied if the Test Return Lead is not properly connected. This is an important safety feature and
should not be defeated unless two wire products are being tested. In that event, it is imperative
that the operator make absolutely sure the Test Return Lead is properly connected to the
equipment being tested. If the lead is not properly connected, a dielectric withstand test failure
may energize exposed dead metal of the equipment being tested. Additionally, the HT-PR may
not recognize the failure. The test will continue for its normal length of time, and the HT-PR
may show a "PASS", see connections for more details.
The HT-PR has been designed for one-touch operation with the right hand. If possible, it should
be set up to the left and in front of the equipment under test. The equipment under test should be
connected to the HT-PR and then left alone by the operator. After the operator is clear of the
Tester and the equipment under test, he should press the
RESET
Button, then the
TEST
Button,
with his right hand. This will allow the greatest separation between the operator and the test
being conducted.
The HT-PR is designed to bleed the high voltage away after the test has concluded. In order to
ensure that any voltage present in the equipment being tested has been completely bled away, the
operator should not unplug the equipment under test from the HT-PR until the front panel meter
reads zero volts.
Summary of Contents for HT-2000PR
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