Kyoritsu Electrical Instruments Works KEW3431, Инструкция по эксплуатации

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(6) Auto discharge function
This function allows electric charges stored in the capacitance
of the circuit under test to be automatically discharged after
measurement. Set the test button or remote control switch to off
with the test leads connected. Discharge can be checked with the
meter, blinking LED and buzzer.
[Display example]
(7) Power off the instrument when measurement completes, and
disconnect the test leads.
Resistance Value ＝ Voltage ／ Current
ＲＸ＝Ｖ／Ｉ
Principle of insulation
resistance measurement
Fig. 8-2
Fig. 8-3
Fig. 8-4