KYORITSU 4202 User Manual
Page 10
̶ 8 ̶
M-4102A
By applying the Voltage (V) to the circuit from the Transformer jaw (CT1), 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 (CT2).
In this case, R displayed in this instrument can be regarded as Rx because Rs can
be regarded small enough against Rx.
#
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 2A 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 1200Ω.
Precision measurement shall be performed with our Earth resistance tester:
M-4102A or M-4105A for the measurement of single-earthed wire.