JIS C 1102:1981

This Japanese Industrial Standard specifies the following electrical indicating instruments for direct current and alternating current, hereinafter referred to as the \"instruments\": voltmeters, ammeters, wattmeters, varmeters, phase meters, powerfactor meters, reactive factor meters, frequency meters. to the instruments weth the accessories such as the multipliers, shunts, instrument transformers, transducer boxes and impedance boxes, this standard shall apply.

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