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Maintenance and common troubleshooting of electromagnetic flowmeter

⮱Electromagnetic flowmeter is a kind of precise instrument. It needs regular maintenance to ensure the accuracy of measurement data. The general maintenance and troubleshooting of electromagnetic flowmeter are explained in detail below.

⮱1) Frequently observe the damage and aging of sensor power cable and transmission cable (or conductor) to protect the rubber sheath outside the cable.

⮱2) Scrub the electrode surface with a soft cloth regularly (usually for half a year) to remove dirt or sediment.

⮱3) Clean up the debris in the straight pipe section upstream of the sensor.

⮱General Faults of Electromagnetic Flowmeter and Their Removal:

⮱1) The liquid does not flow and has output:

⮱1. The signal transmission cable between the converter is connected with a break circuit; 2. The signal cable is connected with the electrode; 3. The surface of the electrode is contaminated or deposited with an insulating layer; 4. The grounding is not good or the circuit is broken.

⮱Solutions: 1. Connect the cable; 2. Open the sensor and reconnect; 3. Scrub the electrode surface; 4. Connect the cable well.

⮱2) No output of liquid flow:

⮱1. Reverse connection between signal transmission cable and converter; 2. Unconnected power supply or poor contact; 3. Leakage of sensor and instrument pipeline, shell and end surface.

⮱Solutions: 1. Inverter head; 2. Connect power supply, maintain good contact; 3. Repair sensor.

⮱3) output instability:

⮱1. Flow field is unstable; 2. The liquid through the sensor contains gas and large solid blocks; 3. Virtual connection of electrical connection; 4. Poor grounding; 5. Electrode leakage.

⮱Solutions: 1. Modify pipelines or install false sensors; 2. Normal phenomena; 3. Check wiring, wiring; 4. Connect wiring; 5. Repair sensors.

⮱4) Excessive error:

⮱1. Excessive zero; 2. Not fully filled with liquid; 3. Excessive distortion of power supply; 4. Poor grounding.

⮱Solutions: 1. Re-adjust the zero point; 2. Improve the pipeline conditions, the sensor is always filled with liquid; 3. Improve the power supply conditions, meet the normal working conditions; 4. Connect the wires well.

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