Upgrade function
Electric field/magnetic field zero:
After the startup, hold down the AVG/VPP and ℃/℉ keys at the same time, about 2 seconds later, enter the zero interface, then the electric field value or magnetic field value will blink and display;
Press AVG/VPP key or ℃/℉ key to switch electric or magnetic field; When the electric field value flashes and the value is less than 10V/m, press the ON/OFF button, the electric field value will return to zero;
When the magnetic field value flashes and the values less than 0.1uT, press the ON/OFF button, mag-nitic field value will return to zero; After clearing, hold-down the AVG/VPP key or ℃/℉ key to exit the zero screen or hold down the ON/Off key to shut down.