... 2.Upload Data:RS232 ETCR 4400 Three Phase Digital Phase Meter Features:Simultaneously measure three-phase AC voltage, current, phase, ... Storage: 500 sets. .Technical Specification FunctionSimultaneous measurement of three-phase AC voltage, current, phase between voltage, phase ... 1 pc; Certification: 1 pc. .Field Application ETCR4400 Three Phase Digital Phase Meter ----Manufactory, RS232 interface