Hioki FT6031-50, Инструкция по эксплуатации

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Measurement Principle
6.2 Measurement Principle
While applying a voltage of AC power supply between H(C)
electrode and E electrode, the flowing AC current I is measured with
an ammeter. In addition, the voltage V between S(P) electrode and
E electrode that is caused by the flow of the current I is measured
by an AC voltmeter.
The earth resistance R
X
of E electrode is derived from the measured
current I and voltage V . It is not possible to accurately measure the
voltages between H(C) and E electrodes and between H(C) and
S(P) electrodes.
Voltmeter
AC Power
supply
l
I
V
=
R
X
×
I
R
X
=
V / I
E electrode
S(P) electrode H(C) electrode
Ammeter
HIOKI FT6031B961-00