Reasons for fluctuations in the display of the electromagnetic flowmeter

When using the magmeter, some customers experience fluctuations in the digital display of the magmeter head (integrated or split), sometimes with negative values, and sometimes with positive values ​​coming out of the meter . Next, let\'s talk about the direct cause of the fluctuation of the displayed value of the electromagnetic flowmeter, it is that the instantaneous flow in the flowmeter is unstable. This situation can be caused by many reasons. In the field, you can use the method of elimination to find the cause of the unstable flow. raison.

The direct reason for the fluctuation of the electromagnetic flowmeter is that the instantaneous flow in the flowmeter is unstable. The electromagnetic flow meter is a precise instrument, and it can accurately detect and display a slight flow change. There are many reasons for instant flow instability. For example, the sectstraight ion of the pipe before and after the electromagnetic flow does not meet the requirements, the medium is not clean or the flow meter is not equipped with a filter, the medium itself is turbulent or the pressure is unstable, and the actual flow in the pipeline exceeds The flow meter itself can measure the flow range and quality of the flow meter itself.

The reason for the fluctuation of the electromagnetic flowmeter is not only the instantaneous instability of the flow. During the debugging period, since the environmental conditions are still good and the flow meter is working normally, it is often easy to ignore the installation conditions at this time. In this case, once the environmental conditions change and a new source of interference appears during operation, it will interfere with the normal operation of the meter and the output signal of the flow meter will fluctuate. The above is only a partreasons for the random jump of the display value of the electromagnetic flow meter, and the possible reasons are as follows:

1. The installation of the filling position is incorrect, the pipe is not full, or there is gas in the pipe system, or air bubbles are sucked in.

2. Regular pulsating flow generated by reciprocating pumps in the piping system.

3. The liquid contains gas or air bubbles.

4. There are strong magnetic fields such as motors around, and there are stray currents on the pipeline.

5. The electrodes of the electromagnetic flowmeter are polluted or the electrodes suitable for the liquid to be measured are not selected correctly.

6. The ground electrode of the electromagnetic flowmeter is not installed correctly or is disturbed by the magnetic field.

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