... energy analyser LCD display kWh, 2. Voltage, current, Hz. power, power factor value from RS485 3. Multif-tariff, demand PMAC903 Universal ... . Spring type buckle, easy to install PMAC903 Universal Electronic Power Meter Basic Function 1. Measure and display kWh value2. ... , I, P, Q, S, PF, F PMAC903 Universal Electronic Power Meter Optional Function 1. Multi-tariff2. Reactive energy measuring3. Demand ...