The DC current range of the multimeter is a multi-range DC voltmeter. The meter head can expand its voltage range by connecting closed-circuit voltage divider resistors in parallel. The DC voltage range of the multimeter is a multi-range DC voltmeter. The voltage divider resistor in series with the meter head can expand its voltage range. The voltage divider resistance is different, the corresponding range is also different. The meter head of the multimeter is a magnetoelectric measuring mechanism. It can only pass direct current and use diodes to convert alternating current into direct current, thereby realizing alternating current measurement.

1. The resistance of the multimeter X1 is measured on the two terminal posts. The resistance value should generally be within a few hundred Ω. Depending on the working voltage and power, there is a difference but not much;

2. Use a resistance file above X10k to measure the resistance between any wiring pile head and the shell. It should be infinite; after use, due to moisture and other reasons, there may be a certain resistance value measured between the heating wire and the shell with a shaker. , But the resistance value should be above 40Ω, otherwise the safety will be problematic.

The multimeter can be used not only to measure the resistance of the object to be measured, but also to measure the DC voltage with AC and DC voltage. Even some multimeters can also measure the main parameters of transistors and the capacitance of capacitors. Fully proficient in the use of multimeter is one of the most basic skills of electronic technology.