... ,phase,frequency,phase sequence,power 2.RS232 ETCR 4200A Double Clamp /Three Phase Digital Phase Meter Our buyers have stayed ... .aliexpress.com/store/502192 Model:ETCR 4200AProduct Category:Tester-Double Clamp /Three Phase Digital Phase Meter Features:Simultaneously measure two ... voltage, current, phase, frequency, phase sequence, power, power factor. Clamp Size: 35×40mm, Phase: 0~360°, AC Current: 0. ...