Hioki 3159 - Page 92

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5.5 PASS or FAIL Determination
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NOTE
If a current double to the preset upper-limit value is detected while performing a
withstand voltage test, the voltage is immediately blocked by the insulation
circuit, resulting in an UPPER FAIL. In such cases, the measured current value is
not displayed correctly.
When the optional "Insulation Resistance Measurement Range" function is set to
"
1
: Auto Range", it takes up to 1.3 s to display the resistance value. When the
test finishes before the preset test time, the test results in a LOWER FAIL.
Setting an upper-limit value while using a fixed range restricts the range of
resistance that can be measured. Therefore, even if a resistance value lower than
the preset upper-limit value is measured, O.F. is displayed resulting in an UPPER
FAIL.
(
See Section 4.3.2
)
Flow of FAIL determination
1.
Press the START key to start a test.
2.
Perform a withstand-voltage and insulation-resistance test.
3.
When the measured current or measured resistance values deviate from
the preset test settings, the unit stops outputting a voltage and switches to
the FAIL state.
FAIL
lights up in the FAIL state together with
LOWER
or
UPPER
.