Hioki IR4056 - Discharging Function

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2.5 Discharging Function
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When measuring an insulation resistance that contains a
capacitance element, a charge proportional to the measurement
voltage accumulates, and if undischarged could lead to an
electric shock accident.
2.5 Discharging Function
1.
Without removing the test leads from the item being
measured, release the MEASURE key.
2.
The built-in discharge circuit automatically discharges the
item.
On the IR4057, the amount of remaining bar graph will
decrease when the instrument is discharged.
3.
The discharge will end when the disappears.
(The time required for discharge depends on the
capacitance value.)