Hioki BT5525, Instruction Manual, Page: 56 / 215

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Discharging Residual Electric Charge (Auto Discharge Function)
4.6 Discharging Residual Electric Charge
(Auto Discharge Function)
This instrument can discharge residual electric charge through the internal circuit.
WARNING
„
If the DUT contains capacitance, discharge the DUT using the discharge
function of the instrument before starting an insulation resistance test.
Since the DUT is still charged with electric charge equivalent to the test voltage due
to capacitance, electric shock accidents may occur.
Discharge the DUT according to the following procedure after the test.
1
End the test with the test leads in contact with the DUT.
2
While the TEST indicator is lit dimly, keep the test leads connected to the DUT.
The electric charge remaining in the DUT is automatically discharged inside of the instrument (the
TEST indicator is lit dimly).
When the voltage drops below 1 V or so, the TEST indicator turns off.
3
Remove the test leads from the DUT after the TEST indicator turns off.
HIOKI BT5525A961-00