Commonly used electrical instrumentation classification which
There are many types of electrician instruments, how to classify the electrician instruments that we usually use? Below, Xiaobian to introduce to you, the popularity of electrician knowledge. According to the measurement method: According to the measurement method, electrical instruments are mainly divided into direct-reading instruments and comparative instruments. Direct-reading instruments: According to the location of the meter pointer directly from the dial readings, such as ammeter, multimeter, megger and so on. Comparison of instruments: will be measured with the known standard quantities to measure, such as bridges, grounding resistance meter. Other classification methods (1) According to the reading method can be divided into pointer, cursor, digital and so on; (2) According to the installation can be divided into portable and fixed installation; (3) according to the instrument protection performance can be divided into: ordinary, dust-proof, splash-proof, waterproof, watertight, airtight, (4) The parameters measured by the meter can be divided into: ammeter, voltmeter, power meter, meter, ohmmeter, megger and so on. (5) according to the nature of the measured physical classification can be divided into DC meter, AC meter and AC and DC meter. AC ammeter is generally based on the RMS sine wave AC scaling.
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