MDtest (100-140 V) - User’s Manual 4 Measurements
• Press the test tip against the exposed conductive part of the tested appliance.
• Press the [TEST] key. If the CAL indicator lights up during measurement,
it means that the test lead resistance is compensated.
• After finishing the measurement, the last measured value is displayed.
The lowest measured value can be displayed - press the [3 RPE] key
during the measuring. The current and the lowest value are displayed
now. When the measurement is finished, only the lowest value is dis-
played. To deactivate the function, press the [3 RPE] key again.
WARNING
If only >10.00 Ω is displayed it means that the measured earth bond
resistance is higher than the maximal value which can be measured
by MDtest. The maximal value is the sum resistance of the test
leads and the resistance of the earth bond!
4.4 Insulation resistance - Riso
The three insulation resistance tests take measurements on (250 V):
• Mains – Protective earth [M-PE]
• Applied part - Protective earth [AP-PE]
• Mains – Applied part [M-AP]
Figure 5: RisoM-PE measurement
c
2018 ILLKO, s.r.o. www.illko.cz Page 22
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