35
Precise Measurement for Earth Resistance
(Precise Measurement Method, Three-pole Method)
Performing zero adjustment
Always perform zero adjustment prior to measurement.
1
2
5
6
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4
1
Remove the cover that protects the
measurement terminals.
2
Make sure that no sand, gravels
or small stones remain inside the
measurement terminals.
3
Connect black, yellow and red
measurement cables respectively to E,
S(P) and H(C) terminals of the device.
4
Short-circuit the tips of the three
measurement cables.
5
Press
the
button to turn it on.
6
Press
Fn
button to display
(three-pole method).
Earth potential appears on the display.
7
Press
MEASURE
button.
A measured value of approx. 0
Ω
appears in
approx. 8 seconds, and
lights up.
When OPEN appears below the measurement
terminal (
), the measurement cable may
not have been connected to a measurement
terminal, or the cable may have an open
circuit. Check the connection and perform
cable check with a tester etc.
8
Press
0
Ω
ADJ
button.
lights up and then zero
adjustment is completed.
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