Double Clamp /Three Phase Digital Phase Meter 1.measure AC voltage,current,phase,frequency,phase sequence,power 2.RS232 ETCR 4000A Double Clamp /Three Phase Digital Phase Meter Features: Simultaneously measure two AC voltage, current, phase, frequency, phase sequence, power, power factor. Clamp Size: φ7.5mm×13mm, Phase: 0~360°, AC Current: 0.0mA~20.0A, AC Voltage: 0.00 V~600V, Active Power: 0.0W~ ...