... -phase 3-wire, 3-phase 4-wire, single-phase mode 3) V, A, W, VA, VAR, KWh, PF, Hz measurement 4) Double display two ... parameters on eash menu and store 28 groups of measurement parameter 5) Measure total power value and five power parameters of each phase ... , Humidity 80%, frequency for voltage, current: 45 Hz ~ 65 Hz Three Phase Digital Power Clamp Meter