analogue meter 1.CCC CE approved 2.AC input and AC output ... and Working Principle1.1 The SCD48, SCD72, SCD96 series square instruments are with electromagneticsystem and repellency structure. The instrument is constituted ... .2 SCD72,SCD96 series DC ammeter, voltmeter, frequency meter, active/reactivepower meter, power factor meter are rectifier square meters. They are composed ofthetwo ...