Electromagnetic flowmeters are widely used in flow detection of conductive liquid media. If the flow shows a negative value during installation or operation, the reasons and treatment methods are as follows.
Reference address：Causes and treatments for negative values displayed by electromagnetic flowmeter
There are several reasons why the electromagnetic flowmeter displays a negative flow value:
1. The sensor is not installed according to the flow direction mark, resulting in the opposite measurement direction. Solution: Reinstall.
2. The sensor signal line is connected in reverse. Since the electromagnetic flowmeter has the function of measuring forward and reverse flow, it displays reverse flow. Solution: Replace the signal line.
3. The measuring pipe is empty or not full, and there is gas. At this time, the flow meter will display a negative number or the flow value will fluctuate. Solution: Let the pipe be filled with the measured medium so that the flow meter has the measurement conditions.
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