Press the power button (ON/OFF) to turn on the power, and then move the probe away from the magnetic field, and press the reset button (ZERO RESET) to make the display value display zero.
Press the power key (ON/OFF) to power on, then move the probe away from the magnetic field, press the reset key (ZERO RESET) so that the value of the display is shown to zero.
Press the power key (on / off) to turn on the power supply, then keep the probe away from the magnetic field, and press the zero reset key to display the value of the display as zero<br>