Three Phase Digital Power Clamp Meter V, A, W, VA, VAR, KWh, PF, Hz measurement RS232 interface TRMS Autorange FEATURES Power measurement of 3 ... , single-phase mode V, A, W, VA, VAR, KWh, PF, Hz measurement Double display two parameters on eash menu and store ... .0%Active energy(kWh) 10/100/1000/10000kWh±3.0%Frequency(Hz)20 ~ 1000Hz 0.5%Display4 digits LCD 9999Power supply4 x ...