GVDA Mini digital multimter Arrive GD103B Have Below main fuction. Data holod, Blacklight, Auto power off,DC AC Voltage measurement,DC current measurement, resistane measurement, Continuity measurement,Diode measurement.
Data Hold
Press 
key, enter data hold mode/cancel data hold mode
Backlight
Press 
key, and keep more than 2 seconds to turn on backlight / turn off back light,
Auto power off
l If there is no operation within 15 minutes, the meter will auto power off. Press key or turn the knob, and the meter will return to working state.
l Press and hold the 
key and turn on the power supply of the meter to cancel auto power off function.
DC/AC voltage measurement
1) Turn the knob to DC voltage or AC voltage shift and select the appropriate range.
2) Insert the red probe in “
” socket，insert the black probe in “COM” socket。
3) Contact the probe to the measured circuit (connect to the measured power supply or circuit in parallel), measure the voltage.
4) Read the measurement result on display.
DC current measurement
1) Turn the knob to DC current shift and select the appropriate range.
2) Insert the red probe in “
” socket or 10A Socket，insert the black probe in “COM” socket。
3) Disconnect the power of the tested circuit; connect the meter to the circuit under test, then turn on the circuit power supply.
4) Read the measurement result on display.
Resistance measurement
1) Turn the knob to resistance shift and select the appropriate range.
2) Insert the red probe in “
” socket，insert the black probe in “COM” socket。
3) Contact the probe to the measured circuit, measure the resistance.
4) Read the measurement result on display.
Continuity measurement
1) Turn the knob to 
shift.
2) Insert the red probe in “
” socket，insert the black probe in “COM” socket。
3) Contact the probe to the measured circuit, measure the resistance.
4) If the resistance or circuit of the measured resistance is less than 50Ω, the buzzer will sound; the screen displays the resistance of the measured circuit.
Diode measurement
1) Turn the knob to 
shift.
2) Insert the red probe in “
” socket，insert the black probe in “COM” socket。
3) Touch the diode anode with the red probe, the black probe contacts the diode cathode.
