A Brief Introduction to the Operation and Maintenance of Multimeters
The article introduces the basic structure of a multimeter and, based on the author's practical experience in multimeter calibration and maintenance, summarizes the precautions in using a multimeter. Effective and efficient maintenance methods and steps are proposed for different fault manifestations of a multimeter. Interested friends can take a look!
The article introduces the basic structure of a multimeter and, based on the author's practical experience in multimeter calibration and maintenance, summarizes the precautions in using a multimeter. Effective and efficient maintenance methods and steps are proposed for different fault manifestations of multimeters.
In the process of power production, a multimeter is an essential and important measuring tool because it is easy to carry, has multiple ranges, and has a wide range of applications. It can be used for measuring DC current, DC voltage, AC voltage, DC resistance, and other aspects. Some can also measure audio power, level, inductance, capacitance, etc. But it also has its shortcomings, which are complex wiring, cumbersome use, frequent gear shifting, and easy occurrence of faults and damage. So the correct use and maintenance of a multimeter are the key to extending its service life and ensuring measurement accuracy.
Composition of a multimeter
(1) Header. Usually, a magneto electric measuring mechanism is used as the header of a multimeter. Its full-scale deflection current is generally a few microamperes to several hundred microamperes, and the smaller the full-scale deflection current, the higher the sensitivity.
(2) Measure the circuit. The measuring line of a general multimeter consists of a multi range DC ammeter, a multi range DC voltmeter, a multi range AC voltmeter, and a multi range ohm. Some models of multimeters have multi range AC current measuring lines.
(3) Conversion switch. The selection of various measuring objects and ranges for a multimeter is achieved through a conversion switch, which has fixed and movable contact points. When the movable and fixed contact points are closed, the circuit can be connected.
