Industrial Energy Meter single&3 phase RMS measurement for volt,amp,power.frequency,power factor,reactive power,etc. 2011--Industrial Energy ... DC)Measure ParametersRMS measurement, 1/3 phase volt,amp,power,power factor,frequency,KWH,reactive powerAppearance48H*96W*100Lmm, ... Communicaiton RS485 / RS232 MODBUS RTU protocol Working Environmenthumidity: 35-85% RH Temperature: 0-50ºC WeightSingle phase ...