Owner's manual

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M-4102A
By applying the Voltage (V) to the circuit from the Transformer jaw (CT 1 ), current I
is (shall be flowed) flowed corresponding to the earth resistance. R can be put out
by the calculation after detecting the current with the other Transformer jaw (CT
2 ).
In this case, R displayed in this instrument can be regarded as Rx because Rs can
be regarded small enough against Rx.
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CAUTION
This instrument is not supporting the measurement for the locations with
following earth systems.
󱛠 Single-earth that is not connected to other earths. (Lightning rod, etc.)
󱛠 Earth on which a current over 2 A is measured at AC current function of this
instrument.
󱛠 Earth with a larger earth resistance than an earth resistance of testing.
󱛠 Earth with earth resistance over 1200 Ω .
Precision measureme
nt shall be performed with our Earth resistance tester:
M-
4102 A or M- 4105 A for the measurement of single-earthed wire.