... distortion±1.5%(impedance load)Response time2msRead outputVoltage , Current, Power, Frequency, LED digitalProtections functionOver voltage, over load, over temperature Short, over current latches output ... OFF and alarmCooling systemForced fan - cooling typeOperating Temperature/HumidityTemperature :0-45oCHumidity :0-90% (no-coagulating) Digital Programmable Variable Frequency AC Power Supply ...