Electromagnetic flowmeter common troubleshooting methods - Just Measure it

Electromagnetic flowmeter common troubleshooting methods

 

Phenomenon

Reason

Treatment Measures

No flow signal output from the meter 1. The flow meter power supply is not normal. 1. Check whether the output voltage of the power supply circuit board is normal.
2. The cable connection is not normal. 2. Connect the cables correctly.
3. Liquid flow conditions do not meet the requirements 3. Check the direction of liquid flow and whether the tube is full of liquid.
4. The sensor parts are damaged or there is an adhesion layer inside the measurement wall. 4. Regularly carry out the cleaning of the covered liquid scar layer.
5. The converter components are damaged. 5. Replace the damaged components.
Output value fluctuation 1. Electromagnetic interference generated by external stray currents, etc. 1. Check if there are large electrical appliances or welding machines working in the flow meter operating environment.
2. The pipe is not filled with liquid or the liquid contains air bubbles. 2. Make the liquid full tube or bubble flatten.
3. The power board of the flowmeter is loose. 3. Disassemble the flow meter and re-fix the circuit board.
The flow measurement value does not
match the actual value
1. Transmitter circuit board failure. 1. Check if the transmitter
circuit board is intact.
2. Liquid flow rate is too low,
containing tiny bubbles
2. Ensure that the flow rate of the measured liquid
in the pipeline is above the minimum flow limit value.
3. Signal cable is not well connected. 3. Check whether the signal cable connection and
the insulation of the cable are intact.
4. The parameter setting value of
the converter is not accurate.
4. Re-set the converter setting value and calibrate
the zero and full value of the converter.
Output signal over the range 1. Signal cable wiring error. 1. Check the signal circuit connection.
2. The parameters of the
converter are not set correctly.
2. Check whether each parameter setting and
zero point and fullness of the converter meet the requirements.
3. Mismatch between
converter and sensor model.
3. Switch the type of
converter and sensor.
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