What is a multimeter? What's the use of a multimeter
Multimeters, also known as multimeters, multimeters, three-meters, multimeters, etc., are indispensable measuring instruments in power electronics and other departments. Generally, the main purpose is to measure voltage, current and resistance. Multimeters are divided into pointer multimeters and digital multimeters according to the display method. It is a multi-functional and multi-range measuring instrument. Generally, the multimeter can measure DC current, DC voltage, AC current, AC voltage, resistance and audio level, etc., and some can also measure AC current, capacitance, inductance and semiconductor. some parameters.
basic skills:
The multimeter can be used not only to measure the resistance of the measured object, but also to measure the DC voltage. Some multimeters can even measure the main parameters of transistors and the capacitance of capacitors. It is one of the most basic skills of electronic technology to be fully proficient in the use of multimeters. Common multimeters include pointer multimeters and digital multimeters. The pointer multimeter is a multi-functional measuring instrument with the meter head as the core component, and the measured value is read by the pointer of the meter head. The measured value of the digital multimeter is directly displayed in digital form by the liquid crystal display, which is easy to read, and some also have a voice prompt function. A multimeter is a meter that combines a voltmeter, an ammeter and an ohmmeter in one head.
The multimeter is a magnetoelectric instrument with a rectifier that can measure various electrical parameters such as AC and DC current, voltage and resistance. For each electrical quantity, there are generally several ranges. Also known as multimeter or multimeter for short. The multimeter is composed of a magnetoelectric ammeter (meter head), a measuring circuit and a selection switch. Various electrical parameters can be measured conveniently by changing the selection switch. The main basis of its circuit calculation is the closed circuit Ohm's law. There are many types of multimeters, and they should be selected according to different requirements when using them.
The DC current file of the multimeter is a multi-range DC voltmeter. The voltage range can be expanded by connecting the closed-circuit voltage dividing resistor in parallel with the meter head. The DC voltage file of the multimeter is a multi-range DC voltmeter. Connecting the voltage dividing resistor in series with the meter head can expand its voltage range. Different voltage dividing resistors have different corresponding measuring ranges. The head of the multimeter is a magnetoelectric system measuring mechanism, which can only pass through direct current, and use diodes to change alternating current into direct current, thereby realizing the measurement of alternating current.
