1The meter head is a common design, i. e. the ground wire at the measuring end is interlinked with the ground wire at the power supply end (except the isolation meter). 2The meter head is equipped with voltage calibration potentiometer, current calibration potentiometer, if there is any error, you can calibrate it, because the error is absolute. 3The voltage meter adopts the design of automatic movement of the decimal point. 4This meter has strong anti-interference ability and fast display refresh rate. 5The meter head uses a wide power supply range: DC3.5 ~ 30V (except the isolation meter), the power supply reverse connection will not burn.
