After using the multimeter, put the change-over switch in ().
After using the multimeter, put the change-over switch in (the highest AC voltage or neutral).
Because after the multimeter is used, it is safest for the multimeter to put the change-over switch in the highest AC voltage or neutral position. The internal resistance of the multimeter with the highest AC voltage or neutral position is very large, and the multimeter meter and circuit will not be burned because of the improper parking position of the multimeter change-over switch.
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Generally, the main purpose of multimeter is to measure voltage, current and resistance. Multimeters are divided into pointer multimeter and digital multimeter according to the display mode.
Multimeter can be used to measure not only the resistance of the measured object, but also the AC and DC voltage. Even some multimeters can measure the main parameters of transistors and the capacitance of capacitors. Common multimeters include pointer multimeter and digital multimeters.
The pointer multimeter is a multifunctional measuring instrument with the meter head as the core component, and the measured value is read by the pointer on the meter head. The measured value of digital multimeter is directly displayed in digital form by LCD screen, which is convenient to read. Multimeter is a common meter that integrates voltmeter, ammeter and ohmmeter.
The DC current file of multimeter is a multi-range DC voltmeter. The voltage range of the meter can be expanded by connecting the closed-circuit voltage divider in parallel. The DC voltage range of multimeter is a multi-range DC voltmeter. The voltage range of the meter can be expanded by connecting the voltage divider resistor in series. Different voltage dividing resistors have different corresponding ranges.
The meter head of the multimeter is magnetoelectric measurement *, which can only change AC into DC by using diodes, thus realizing the measurement of AC.
After the multimeter is used, the transfer switch should be placed in the maximum range of AC voltage. If it is not used for a long time, the battery inside the multimeter should also be taken out to prevent the battery from corroding other devices in the meter.
