5.3 Terminate the Test
74
Automatic discharge function
When a test object that contains a capacity component is subjected to a test, the
object might remain electrically charged, thereby causing an electric shock.
The instrument automatically switches to the internal discharge circuit to dis-
charge the test object (the DANGER lamp is lit). When the voltage between the
output terminals falls below the safety voltage (approximately 30 V AC or 60 V
DC), the DANGER lamp goes out. The larger the capacity component of the test
object, the more time is required to discharge the test object.
This instrument is equipped with a function to discharge residual electric-
ity upon termination of the insulation-resistance test (discharge resis-
tance: 800 kΩ).
Never touch the voltage output terminals, test lead, or the tested object
until the DANGER lamp goes out.
Tested object
•In W → I mode, the insulation-resistance test does not start up if the voltage
between the output terminals has not fallen below the safety voltage (approxi-
mately 30 V AC) upon completion of the withstand-voltage test.
•In I → W mode, the withstand-voltage test does not start until the voltage
between the output terminals has fallen below the safety voltage (approxi-
mately 60 V DC) upon completion of the insulation-resistance test.
• The instrument does not return to the READY state until the DANGER lamp
goes out upon completion of the test. Until the instrument returns to the
READY state, no key operation is accepted.
• With an optional setting, the instrument can change to the READY state,
regardless of the DANGER lamp indication, upon completion of the test.
See"6.1.4 START Protection" (p. 82)
In such a case, the voltage output terminals may contain residual electricity
even when the instrument is in the READY state.
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