49
Simplied Measurement for Earth Resistance
(Simplied Measurement Method, Two-pole Method)
2
3
4
E
H(C)
5
1
Use a voltage detector etc. to make
sure that there is no voltage on
the N (neutral) side of commercial
power supply.
2
Press the
button to turn it on.
3
Press Fn button to display
(two-pole method).
When (three-pole method) is
chosen, the earth leakage breaker etc. may
be triggered due to its large measurement
current.
4
Connect the L9787 test lead (black)
with the earthing electrode of
measuring object.
5
Connect the L9787 test lead (red) with
the N (neutral) side of commercial
power supply.
Earth potential appears on the display.