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500V. Select the required voltage grade and the indicator light will
show the selected voltage grade. Press the high voltage “start/stop”
button and the indicator light for high voltage will glow. The stable
value displaying on the LCD multiplied by 10 is the measured
insulation resistance value. When the tested insulation resistance
value exceeds the upper limit range of the meter, the screen will
only display “1” on the left-most position. Pressing “start/stop”
button will turn off the high voltage. Pressing down the “ON/OFF”
button will turn off the power supply.
Notes: As measure, accompanied with absorption and
polarization occurring, Insulation reading gradually drifts to large
values or bounces up and down, it is normal.
2. Explanation for the wiring terminals
When measuring the insulation resistance you should connect
the “L” line and the measured object to the current-carrying part.
The grounding “E” should be connected to the shell of the
measured object or the earth. Shield “G” is connected to the
protection parts or the other parts which are not being measured of
the measured object to avoid the error caused by shell leakage.
When measuring the insulation resistance among components of
electronic products, the “L” terminal and the “E” terminal can be
connected to any line. When measuring the resistance between
phases of electrical generator, you can choose two among the
