Associated Research HYAMP II 5030DT, Руководство по эксплуатации и обслуживанию

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INTRODUCTION
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However, specific products may be tested at much higher voltages than 2X operating
vo 1,000 volts. For example, a product designed to operate in the range between
100 to 240 volts, can be tested between 1,000 to 4,000 volts or higher. Most "double
insulated" products are tested at voltages much higher than the "rule of thumb".
Testing during development and prototype stages is more stringent than production run
tests because the basic design of the product is being evaluated. Design tests usually are
performed on only a few samples of the product. Production tests are performed on each
and every item as it comes off the production line.
The hipot tester must also maintain an output voltage between 100% and 120% of
specification. The output voltage of the hipot must have a sinusoidal waveform with a
frequency between 40 to 70 Hz and has a peak waveform value that is not less than 1.3
and not more than 1.5 times the root-mean-square value.
Why Perform a Ground Bond Test .....
Ground bond testing is done to insure that a low resistance path exists between the safety
ground pin of a three-wire line cord and exposed metal of the item under test. If a live
wire inside the item under test came loose and contacted the chassis, the fault current
would flow through the low resistance safety ground, and protect the user.
The need for high current bonding (i.e. 10A or 30A) as apposed to low current go-no go
type testers, results from the nature of line voltage breakers’ high current characteristics.
Safety Grounding circuits must withstand the line voltage breaker’ current rating in order
to maintain a safe voltage potentials on the chassis of the faulty device. Verifying the
integrity of the grounding circuit at high currents insures that the line breaker will open
before the grounding circuit wires fail. This insures that the power will be deenergized at
the device while maintaining safe voltage levels on the chassis.
IF YOU SHOULD HAVE ANY QUESTIONS RELATING TO THE OPERATION
OF YOUR INSTRUMENT CALL 1-800-858-TEST(8378) IN THE U.S.A.