... voltage,current,phase,frequency,phase sequence,power 2.RS232 ETCR 4200A Double Clamp /Three Phase Digital ... Phase Meter Our buyers have stayed with us for 11 years12 years of specialized metersISO ... phase, frequency, phase sequence, power, power factor. Clamp Size: 35×40mm, Phase: 0~360°, AC Current: 0 ... , Active Power: 0.0W~12kW, with RS232 interface to download data, Date Storage: 1500 sets.