Operating procedures and precautions for the use of a multimeter
1,Be familiar with the functions of the multimeter before use, and correctly select the gear, range and pen jack according to the object to be measured.
2,When the size of the measured data is unknown, the range switch should be placed at the maximum value first, and then switch from large range to small range gear, so that the pointer of the instrument indicates more than 1/2 of the full scale.
3, the measurement of resistance, after selecting the appropriate multiplier file, the two pens touch so that the pointer in the zero position, such as the pointer deviates from the zero position, you should adjust the "Zero" knob, so that the pointer to zero to ensure that the measurement results are accurate. If you can not zero or digital display meter issued a low-voltage alarm, should be checked in time.
4, in measuring the resistance of a circuit, you must cut off the power supply of the circuit under test, and do not measure with electricity.
5, the use of multimeter measurement, pay attention to the safety of personal and instrumentation equipment, the test shall not touch the metal part of the pen with your hand, do not allow switching gear switches with electricity to ensure accurate measurement, to avoid electrocution and burn the instrument and other accidents.
Attention to use
Before using the multimeter, it should be "mechanically adjusted to zero", i.e., when there is no power to be measured, the multimeter pointer should be pointed at the position of zero voltage or zero current.
2,During the process of using the multimeter, you should not touch the metal part of the pen with your hand, so as to ensure the accuracy of the measurement on the one hand, and ensure the personal safety on the other hand.
3,When measuring a certain amount of electricity, you can't change the gear at the same time of measuring, especially when measuring high voltage or high current, you should pay more attention to it. Otherwise, the multimeter will be destroyed. If you need to change gears, you should first disconnect the pen, change gears and then go back to the measurement.
4, the multimeter in use, must be placed horizontally, so as not to cause errors. At the same time, we should also pay attention to avoid the influence of external magnetic field on the multimeter.
5, the multimeter has been used, should be placed in the maximum switch AC voltage gear. If it is not used for a long time, the battery inside the multimeter should be taken out, so as to avoid the battery corrosion of other devices inside the meter. [1]
