... Volt-Ampere Meter 1.measure AC voltage,current,phase,frequency,phase sequence,power ETCR 4300 Intelligent Three Phase ... Digital Phase Volt-Ampere Meter Features:Simultaneously measure three-phase ... 1 pc; Certification: 1 pc. .Field Application ETCR4300 Intelligent Three Phase Digital Phase Volt-Ampere Meter----Manufactory, RS232 interface