What are the gears and functions of the digital multimeter
The digital multimeter has resistance, DC voltage, AC voltage, DC current, AC current, diode, triode β value, capacitance, and measurement gear.
The first line (from top to bottom) is marked with R or Ω, which indicates the resistance value. When the switch is in the ohm position, read this scale line.
The second bar is marked with ∽ and VA, indicating the AC, DC voltage and DC current value. When the transfer switch is in the AC, DC voltage or DC current gear, and the range is at a position other than AC 10V, read this scale Wire. The third line is marked with 10V, which indicates the AC voltage value of 10V. When the switch is in the AC and DC voltage range and the range is at AC 10V, read this scale line. The fourth bar, labeled dB, indicates the audio level.
What are the functions of digital multimeter
General digital multimeters 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 some parameters of semiconductors. The basic principle is to use a sensitive magnetoelectric DC ammeter (microampere meter) as the head. When a small current passes through the meter head, the multimeter will have a current indication.
The digital multimeter can not only be used to measure the resistance of the object to be measured, but also the AC and DC voltage can also be used 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 DC current range 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.
