... ,measuring volt,amp,watt,var,va,Hz, cosf,kwh,kvarh, harmonics,Unbalance rate, demand 2. RS485/Modbus, Profibus PMAC770 Multifunction Power Meter with ... , PMAC770 will display on LCD ØReal-time measurement True-RMS measuring parameters includes: U, I, P, Q, S, PF, F, kWh ... %Reactive power2.0%THD1.0%Harmonic1.0%Unbalance rate1.0% multifunction power meter PMAC770 Multifunction Power Meter