PZEM-022 Open and Close CT 100A AC Digital Display Power Monitor Meter Voltmeter Ammeter Frequency

Features 1 Electrical parameter measurement function voltage current active power energy frequency power factor 2 Overload alarm function over power alarm threshold backlight and power flashing to alarm 3 Power alarm threshold preset function can set power alarm threshold 4 The energy can be reset use the key5 Store data when power off6 Large screen LCD 7 Backlight function8 Key Function Backlight controlShort press the key to turn on or off the backlight the backlight has memory function it can store the on or off state when power off Reset energyStep1 Long press the key for 5 seconds until the energy value flash then release the key Step2 Short press the key again then the energy value is cleared and exit the reset flashing state Step3 If there is no operation on the key within 5 seconds it means the energy value is not cleared and will exit the reset state Set power alarm threshold Step1 Long press the key until the LCD screen display SET CLr then release the key to enter the setting stateStep2 Power window display the current power alarm value and the last digit begin to flash then you can short press to plus 1 when there is no operating over 3 seconds it will switch the digit position automatically the setting method is as same as the above Step3 After finish the setting long press the key over 5 seconds will store automatically and exit the range of active power threshold is 0 0 2 5kW it can display six parameters at the same time Sp