Electromagnetic flowmeter common causes of failure

　　Electromagnetic flowmeter is an instrument for measuring the flow of conductive media. It has high measurement accuracy and strong corrosion resistance, so it is widely used. Some problems may occur in actual measurement. Next, Supmea will analyze the causes of common faults of electromagnetic flowmeters.

　　1. Inaccurate measurement data

　　1. The liquid contains bubbles.

　　2. Electrode corrosion leads to inaccurate measurement.

　　3. Electrode scaling and electrode short circuit lead to inaccurate measurement.

　　4. Strong external electric fields lead to inaccurate measurements.

　　2. Output signal exceeds full range

　　1. There is an error in the signal cable wiring or the cable connection is disconnected.

　　2. The parameters of the converter are set incorrectly.

　　3. The converter and sensor models do not match.

　　3. Zero point instability

　　1. Reasons related to the liquid (such as poor uniformity of liquid conductivity, electrode contamination, etc.).

　　2. The insulation of the signal circuit is reduced.

　　3. The pipe is not filled with liquid or the liquid contains bubbles.

　　4. Subjectively, one believes that there is no flow of liquid in the tube pump, but in fact there is a slight flow.

　　4. No flow signal output

　　1. Power failure such as power failure;

　　2. Fault in the connecting cable (excitation circuit, signal circuit) system;

　　3. Failure in liquid flow conditions;

　　4. Failures caused by damage to sensor components or measurement of the inner wall adhesion layer;

　　5. Faults caused by damage to converter components.

　　Above we have analyzed the causes of common failures of electromagnetic flowmeters, which will help you solve the problems better.