Ideal 61-920 Manual De Instrucciones página 10

By applying the Voltage (V) to the circuit from the transformer jaw (CT1), current I is flowing in relation to
the earth resistance. R can be determined by calculation after measuring the current with the other trans-
former jaw (CT2). In this case, R displayed in this meter can be regarded as Rx because Rs can be regarded
small enough against Rx.
This meter cannot support the measurement for the locations with the following earth systems.
• Single-earth that is not connected to other earths (Lightning rod, etc.)
• Earth on which a current over 2AAC is measured.
• Earth with earth resistance over 1200Ω.
CAUTION
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