Most of the measured parameters of the digital display instrument are converted into weak low-level voltage signals and transmitted to the digital display meter over a long distance. Therefore, in addition to useful signals, there will be some interference signals mixed in, which will affect the measurement results of the digital display instrument The correctness.
Interference sources may exist both inside and outside the instrument. For example, outside the digital display meter, high-power electrical equipment and the power grid may become sources of interference. Inside the digital display, transformers, coils, relays, power cords, etc. may become sources of interference.
Dec 27, 2022
