Compliance West HTT-1R, Instruction Manual

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11
Section 4
Troubleshooting the HTT-1R
The HTT-1R requires an annual calibration. If the HTT-1R does not operate as described in the
Theory of Operation section, and the equipment connected to the HTT-1R has been verified to be
in good working condition, then the HTT-1R should be returned to Compliance West USA for
inspection and/or repair.
Table 3 shows expected results for a known good hipot tester for all recommended operating
modes. Table 4 and 5 shows the expected values to be measured with a resistance meter. Values
of less than 1 ohm should be measured with a high precision resistance meter.
Switch designation / Switch position
Operating mode
GROUND LEAKAGE HIPOT
PASS PASS PASS
No failure: the tester connected to the HTT-1R
should indicate test completion with a passing
result.
FAIL PASS PASS
Ground Fail: the tester connected to the HTT-
1R should indicate a “ground open” or “ground
fail” condition.
PASS FAIL PASS
Leakage Fail: the tester connected to the HTT-
1R should indicate an “excess leakage” or
“excess current” failure.
PASS PASS FAIL
Hipot Fail: The tester connected to the HTT-
1R should indicate a “hipot fail” or “dielectric
failure”. The high-voltage arc that occurs to
create the simulated test failure is visible
through the ARC VIEW window.
Table 3: HTT-1R Normal operating modes and expected results.
Ground switch position
Resistance between Chassis and Return
with -0 Ω / +0.03 Ω tolerances
Pass 0.025
Ω −
0.055
Ω
Fail 0.1
Ω −
0.13
Ω
Table 4: HTT-1R Resistance for ground circuit
Resistance between Output and Return with +/-5% tolerances
Leakage switch position LomA option MedmA option HimA option ExmA option
Pass 4.232M Ω 8.48k Ω 424k Ω 220k Ω
Fail 2.088M Ω 424k Ω 200k Ω 120k Ω
Table 5: HTT-1R Resistance for Leakage circuit