GDDO-20C AC/DC Electric Meter Calibration Aaladda waxaa loo isticmaalaa in lagu ogaado qaladka aasaasiga ah ee qalabka korontada ee kala duwan ee nidaamka korontada, oo ay ku jiraan voltmeter, ammeter, wattmeter, ohmmeter, hal weji & saddex weji AC mitir tamarta (ikhtiyaarka) iyo qaladka aasaasiga ah ee mitirka volt-ka DC iyo ammeter.