Compliance West HT-3000P, Instruction Manual

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5
Safety Techniques
The high voltage circuit of the HT-3000P can be shut off at any time by pressing the
RESET button. The HT-3000P 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 ready.
The HT-3000P 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-3000P may not recognize the failure. The test will continue for its normal
length of time, and the HT-3000P may show a "PASS".
The HT-3000P 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-3000P 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-3000P 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-3000P until the
front panel meter reads zero volts.
Using the HT-3000P Dielectric Withstand Tester
The dielectric withstand test involves high voltage and caution should be exercised when
using the tester. The tester's return lead is connected to ground potential and when properly
connected to the equipment being tested, it will guard against the operator contacting high
voltage. Always make sure the return lead is firmly connected to exposed dead metal. In the
sections below, the three tests are discussed.
Ground Check
The Ground check ensures that the grounding pin of the power supply cord is properly
connected to the exposed dead metal of the chassis. If this connection is absent, the exposed
dead metal of your product could be at line potential indefinitely after an internal wiring fault,
causing risk of shock to anyone touching it.
If the green Ground OK LED lights and the test continues, the connection between the
grounding pin and the exposed dead metal of the equipment being tested has a resistance of
below three ohms*.
Ground Check Failures
If the red Ground Open LED lights, the buzzer sounds, and the test is terminated. The
connection between the grounding pin of the attachment plug cap and the exposed dead metal of
the chassis has a resistance of greater than three ohms*. This indicates a problem with the
connection of the HT-3000P to the equipment being tested, or that the ground connection in the
equipment being tested is defective. The connection to the tester should be checked by removing