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5.5 PASS or FAIL Determination
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5.5.3 "FAIL" State
WARNING
Even when a test has been terminated, there may still be voltage in the
output-voltage terminal. Before touching the output-voltage terminal,
H.V. TEST LEAD, or tested object, make sure that no high voltage is
being applied to the output, confirm the following items.
(1) The analog voltmeter reads 0 kV.
(2) The
DANGER
lamp is OFF.
(3) The
READY
lamp is lit (it is off in the Double Action mode).
UPPER FAIL
The measured current has exceeded the upper-limit value.
LOWER FAIL
The measured current has dropped below the lower-limit
value. (When the lower-limit value is set to OFF, LOWER
FAIL is ineffective.)
UPPER FAIL
The measured resistance has exceeded the upper-limit
value. (When the upper-limit value is set to OFF, UPPER
FAIL is ineffective.)
LOWER FAIL
The measured resistance has dropped below the lower-
limit value.
If the measured voltage deviates from the upper or lower value during the
test, the unit switches to the FAIL state and immediately stops outputting a
voltage. The FAIL state can be divided into UPPER FAIL and LOWER
FAIL states. During the insulation-resistance test, if the output voltage
doesn't reach a level between 5% lower and 50% higher than the set test
voltage value, screening will not be performed.
Withstand voltage test
If the output voltage doesn't reach the set test voltage value
±
5% or if the
voltage deviates from the set voltage value, FAIL will result.
UPPER
,
LOWER
or
FAIL
will light.
Insulation resistance test
If the test time has elapsed without the output voltage reaching a level
between 5% lower and 50% higher than the set test voltage value or if the
voltage deviates largely from the set voltage value, FAIL will result.
UPPER
,
LOWER
or
FAIL
will light.
Optional Functions
The FAIL state is held using the FAIL Hold function. (See Section 7.2)
If the
W
or
I
key is pressed when the Hold function is enabled, you can
view the next test result.
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
.
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