Operation Procedures and Precautions for Multimeters
1. Before use, familiarize yourself with the various functions of the multimeter, and correctly select the gear, range, and probe socket according to the object being measured.
2. When the size of the measured data is unknown, the range switch should be set to the maximum value first, and then switched from the large range to the small range range, so that the instrument pointer indicates more than 1/2 of the full scale.
3. When measuring resistance, after selecting the appropriate magnification range, touch the two probes to make the pointer point to zero. If the pointer deviates from zero, adjust the "zero adjustment" knob to make the pointer return to zero to ensure accurate measurement results. If the zero cannot be adjusted or the digital display meter emits a low voltage alarm, it should be checked in a timely manner.
4. When measuring the resistance of a certain circuit, the power supply of the tested circuit must be cut off and live measurement is not allowed.
5. When using a multimeter for measurement, attention should be paid to personal and instrument safety. During testing, it is not allowed to touch the metal part of the probe with hands, and it is not allowed to switch the gear switch with electricity to ensure accurate measurement and avoid accidents such as electric shock and instrument burnout. [1]
Precautions for use
1. Before using a multimeter, it is necessary to perform a "mechanical zeroing", which means that when there is no measured power, the multimeter pointer should be placed at the zero voltage or zero current position.
2. During the use of a multimeter, do not touch the metal part of the probe with your hands. This ensures accurate measurement and personal safety.
3. When measuring a certain amount of electricity, it is not advisable to shift gears at the same time, especially when measuring high voltage or high current. Otherwise, it will damage the multimeter. If you need to shift gears, disconnect the probe first and then measure after shifting gears.
4. When using a multimeter, it must be placed horizontally to avoid errors. At the same time, it is also important to avoid the influence of external magnetic fields on the multimeter.
5. After using the multimeter, the conversion switch should be set to the maximum AC voltage setting. If not used for a long time, the battery inside the multimeter should be removed to prevent corrosion of other components inside the meter. [1]
