How to use a Digital multimeter:
1. Before measuring, make sure that the multimeter is in good condition and the reading is correct. Pen is perfect. Attachments are intact. Especially when measuring high voltage, it is necessary to ensure that the insulation of the test leads is good.
2. Select the appropriate gear according to the measured object, select the voltage gear for the voltage, the current gear for the current, and the ohm gear for the resistance. The test leads should be plugged into the correct sockets. When measuring voltage and resistance, the black test lead is inserted into the COM port, and the red test lead is inserted into the V/Ω port. Pay special attention to the fact that the test leads cannot be inserted into the current interface when measuring the voltage. If it is light, the watch will be burnt, and an electric shock accident will occur.
