... kinds of control system, SCADA system and power management system. 2.Technical Measure- Measurement: VL1, VL2, VL3,AL1, AL2, AL3, F ... humidity: 5% ~ 95% (no condensation) - Altitude: < 2500m 3. Options- Communication (/C) :RS485 (Modbus-RTU); 1 start bit, 8 data bit, 1 ... error of phase sequence and of loosing voltage- Pulse output (/P): 2 pulse outputs (open-collector), one for kWh, another for kvarh ...