Multimeter to measure DC voltage and AC voltage
(1) Measurement of DC voltage
Such as batteries, batteries, etc. Insert the black test lead into the "com" hole, and the red test lead into the "V Ω". Select the knob to a range larger than the estimated value (note: the values on the dial are the maximum range, "V-" represents the DC voltage range, "V～" represents the AC voltage range, and "A" is the current range), then set the Connect the test leads to the power supply or both ends of the battery; keep the contact steady.
The value is directly read from the display screen. If it is displayed as "1.", it means that the range is too small, and it is necessary to increase the range before measuring. If "-" appears on the left side of the value, it means that the polarity of the test lead is opposite to that of the actual power supply. At this time, the red test lead is connected to the negative pole.
(2) Measurement of AC voltage
The test pen jack is the same as the DC voltage measurement, but the knob should be turned to the required range at the AC gear "V~".
There is no positive or negative AC voltage, and the measurement method is the same as the previous one. Whether measuring AC or DC voltage, be sure to pay attention to personal safety and do not touch the metal part of the test pen with your hands.
The above is the method of measuring the short circuit of the line with the multimeter, and briefly introduces the method of measuring the DC voltage and the AC voltage with the multimeter. I hope it will be helpful to you.
