How to ensure the normal operation of the sewage electromagnetic flowmeter

　　With the development of science and technology, sewage electromagnetic flowmeter is a new type of flow measurement instrument that has developed rapidly along with the development of electronic technology. Electromagnetic flowmeter is an instrument that uses the principle of electromagnetic induction to measure the flow of conductive fluid based on the electromotive force induced when the conductive fluid passes through an external magnetic field.

　　How to ensure the normal operation of the electromagnetic flowmeter? Maintenance is essential. Enterprises can conduct a comprehensive inspection of the electromagnetic flowmeter once a year. The inspection content includes: appearance inspection, converter characteristic test, measurement value calibration, measurement of each voltage, measurement of insulation resistance, circuit confirmation, etc. When checking and adjusting the instrument, it is very important to adjust the zero point due to zero drift ("online zero adjustment" must stop the flow of the measured medium, which is not easy to do in practice). Therefore, online inspections often omit inspections involving sensor operation and only implement converter calibration, so as to compare the online inspection results with historical data to determine whether the instrument should continue to be used, repaired or updated. For sensors, the degree of deterioration of the insulation resistance of the measured excitation coil determines whether to update or not.

　　Verify the electromagnetic flowmeter for any abnormalities through online inspection. For pipelines that cannot stop the flow of media, check the flow sensor and converter separately. Use analog signal devices and other general instruments to test the converter with high calibration accuracy (this depends on the accuracy of the analog signal device). Sensor inspection is done by testing the electrical contact resistance, checking the insulation resistance and copper resistance of the excitation coil including the excitation connection cable, and checking the excitation current output by the converter, and checking the magnetic field strength. For pipelines that can stop the flow of media, enter through the preset entry hole near the sensor to check the electrical and lining contamination/deposition conditions and clean them.

　　The above is what the flow meter manufacturer shared: "How to ensure the normal operation of the sewage electromagnetic flow meter must be done this way". Thank you for watching. If you have any questions, you can consult online or leave us a message. We will answer you wholeheartedly.