The reason why the electromagnetic flowmeter shows fluctuation is not only the instantaneous flow instability, but also the flowmeter works normally during the commissioning due to the good environmental conditions, and it is often easy to neglect the installation conditions. In this case, once the environmental conditions change, a new source of interference occurs during operation, which will interfere with the normal operation of the meter, and the output signal of the flow meter will fluctuate.
The above is only a part of the cause of the magnetic flowmeter display value jump, and the possible reasons are as follows:
1. The installation position is incorrect, the pipe is not full, or there is gas in the pipe system, or air bubbles are sucked in.
2. A regular pulsating flow generated by a reciprocating pump or the like in the piping system.
3. The liquid contains gas or bubbles.
4. There is a strong magnetic field such as a motor around, and there is stray current on the pipeline.
5. The electromagnetic flowmeter electrode is contaminated, or the liquid does not match the electrode. 