When power on, the meter display the measure parameters.
When power on, you can press the button of SAM CK last for 5 seconds,
then the electric energy will to be zero and start to cumulate when release the button.
And when power off, the meter can save the value of electric energy and go on cumulating data when the meter power-on next.
External CT wiring diagram:
Package included:
1 x Digital Single Phase Energy Meter