... measure voltage , current ,active power, reactive power ,apparent power ,PF,Kwh,Hz EU9 Series digital Kwh meter ... power, reactive power ,apparent power ,PF,Kwh,Watt, Hz1) Power supply: AC/DC 100-240V2) Available for measuring voltage (V), current(I), Active power (P), Reactive power (Q), Appearant power(S), Power factor(PF) and Kwh ... ±0.5% F.S± 2digits9) Input range ... Sampling rate: 2 times/s15) ...