The multimeter is a multi-purpose, multi-range electrical instrument, which is an important measuring tool for checking the depreciation of the automobile circuit. Improper use will cause measurement errors or damage accidents. Therefore, it should be carefully observed, carefully operated, and used correctly. When using a multimeter, you must pay attention to the following:
1 When using the multimeter, the watch should be placed flat and free of vibration.
2 See if the pointer is in the mechanical zero position before use. If it is not in the zero position, it should be adjusted to “0†position.
3 Correctly select the type and range, and according to the measurement object, turn the transfer switch to the desired gear.
1 Select the jack correctly, the red bar is inserted in the “+†of the watch, and the black bar is inserted in the “one†hole. Some multimeters have a special jack for measuring AC and DC 2500V. When used, the black watch stick is still inserted into the "one" hole, and the red watch is inserted into this special jack. Pay attention to polarity when measuring m,
For example, when measuring DC, the red bar should be connected to the positive part of the measured part, and the black bar should be connected to the negative part of the measured part.
5 Wiring should be correct. When measuring voltage, it should be connected in parallel. When measuring DC current, it should be connected in series.
6 To use the ohmic gear correctly, and pay attention to the selection of the appropriate gear, especially when measuring the crystal 瞥, to ensure the accuracy of the 和 and the safety of the transistor. Each time the gear is selected, it must be zeroed before the measurement, and it cannot be measured at the same time. The live measurement is not only ineffective, but it is also likely to burn out the meter.
1 When using the multimeter, the watch should be placed flat and free of vibration.
2 See if the pointer is in the mechanical zero position before use. If it is not in the zero position, it should be adjusted to “0†position.
3 Correctly select the type and range, and according to the measurement object, turn the transfer switch to the desired gear.
1 Select the jack correctly, the red bar is inserted in the “+†of the watch, and the black bar is inserted in the “one†hole. Some multimeters have a special jack for measuring AC and DC 2500V. When used, the black watch stick is still inserted into the "one" hole, and the red watch is inserted into this special jack. Pay attention to polarity when measuring m,
For example, when measuring DC, the red bar should be connected to the positive part of the measured part, and the black bar should be connected to the negative part of the measured part.
5 Wiring should be correct. When measuring voltage, it should be connected in parallel. When measuring DC current, it should be connected in series.
6 To use the ohmic gear correctly, and pay attention to the selection of the appropriate gear, especially when measuring the crystal 瞥, to ensure the accuracy of the 和 and the safety of the transistor. Each time the gear is selected, it must be zeroed before the measurement, and it cannot be measured at the same time. The live measurement is not only ineffective, but it is also likely to burn out the meter.
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