-
Anonymous users2024-02-06A multimeter is a magnetoelectric instrument with a rectifier that can measure a variety of electrical parameters such as AC and DC current, voltage and resistance.
For each type of electrical quantity, there are generally several ranges. It is also known as multi-meter or multimeter for short. The multimeter is composed of a magnetoelectric ammeter (meter), a measuring circuit, and a selector switch.
By selecting the switch change, a wide range of electrical parameters can be easily measured. The main basis for its circuit calculations is Ohm's law for closed circuits. There are many types of multimeters, and they should be selected according to different requirements when they are used.
The multimeter consists of three main parts: the meter, the measuring circuit and the transfer switch.
The multimeter is the most basic tool in the field of electronic testing, and it is also a widely used test instrument.
Multimeter is also called multimeter, three-purpose meter (a, v, that is, current, voltage, resistance three-purpose), multiplex meter, multimeter, multimeter is divided into pointer multimeter and digital multimeter, there is also an oscilloscope multimeter with oscilloscope function, is a multi-functional, multi-range measuring instrument.
Generally, the multimeter can measure DC current, DC voltage, AC voltage, resistance and audio level, and some can also measure AC current, capacitance, inductance, temperature and some parameters of semiconductors (diodes, transistors). Digital multimeters have become mainstream and have replaced analog meters. Compared with analog instruments, digital instruments have high sensitivity, high accuracy, clear display, strong overload capacity, easy to carry, and are more convenient and simple to use.
-
Anonymous users2024-02-05Test the magnification value of the transistor.
-
Anonymous users2024-02-04The HFE file on the multimeter is used to measure the current amplification of the transistor transistor.
Multimeter, also known as multiplex meter, multi-meter, three-purpose meter, multi-meter, etc., is an indispensable measuring instrument for power electronics and other departments, generally to measure voltage, current and resistance. Multimeters are divided into pointer multimeters and digital multimeters according to the way they are displayed. It is a multi-functional, multi-range measuring instrument.
Basic use: The multimeter can not only be used to measure the resistance of the object to be measured, but also the AC and DC voltage. There are even multimeters that measure the main parameters of transistors and the capacitance of capacitors.
Being proficient in the use of a multimeter is one of the most basic skills in electronic technology.
Basic Functions:
The multimeter can not only be used to measure the hidden resistance of the object to be measured, but also the AC and DC voltage. There are even multimeters that can measure the main parameters of the transistor, the capacitance of the capacitor, etc. Being proficient in the use of a multimeter is one of the most basic skills in electronic technology.
Common multimeters are analogue multimeters and digital multimeters. The analog multimeter is a multi-functional measuring instrument with a meter head as the core component, and the measured value is indicated and read by the meter head pointer. The measured values of the digital multimeters are displayed digitally directly on the LCD screen, which is easy to read, and some have a voice prompt function.
The multimeter is a common head, which integrates voltmeter, ammeter and ohmmeter.
The bad part is the transformer, the transformer in the circuit can be used for the audio output transformer for transistor radio, the secondary is used as the primary of the step-up transformer, the tap in the middle of the primary is not used, and the taps at both ends are used as the secondary of the step-up transformer. If you can't find a suitable transformer, you can also use the silicon steel sheet of the radio output transformer to make your own, and use a high-strength enameled wire with a diameter of 0 25mm for 110 turns for the primary stage, and a high-strength enameled wire with a diameter of 0 21mm for 520 turns for the secondary. A layer of insulating paper should be added between the primary stages, and attention should be paid to the eponymous end of the primary stage coil. >>>More
The principle and maintenance of pointer multimeter, the role of components, maintenance methods, and internal structure are explained in detail.
Turn the digital multimeter to the current gear, take the red and black stylus to the two sides of the contact switch under the float, there is a current display to prove that it is energized, and there is no current display to the line is faulty.
Looking for faults should be first outside and then inside, easy first and then difficult, and the whole should be broken into zero, and the key breakthroughs should be made. The methods can be roughly divided into the following types:1 >>>More
How to use a multimeter, how to use a multimeter, and a tutorial to get started with a multimeter.