Common maintenance and maintenance of domestic electromagnetic flow meter

Abstract: The common maintenance and maintenance information of domestic electromagnetic flowmeters is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Maintenance and maintenance of electromagnetic flowmeter 1. Routine maintenance We all know that any product needs reasonable maintenance and maintenance to increase its service life, so the instruments and meters are no exception (thermocouples, transformers, flowmeters, etc.). Just pair the meter. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the commonly used maintenance and maintenance articles of domestic electromagnetic flowmeters. Maintenance and maintenance of electromagnetic flowmeter 1. Routine maintenance We all know that any product needs reasonable maintenance and maintenance to increase its service life, so the instruments and meters are no exception (thermocouples, transformers, flowmeters, etc.). Just make periodic visual inspections of the instrument, check the surrounding environment of the instrument, remove dust, ensure that no water and other substances enter, check whether the wiring is in good condition, and check whether there is a new strong electromagnetic field device near the instrument or a new wire crossing the instrument. If the measuring medium is easy to contaminate the electrode or deposit or scale in the measuring tube wall, it should be cleaned and cleaned regularly. 2. Troubleshooting After the flowmeter is put into operation or normally put into operation, when it is found that the instrument is not working properly after a period of time, you should first check the external conditions of the flowmeter, such as whether the power supply is good, whether the pipeline leaks or is not full. Status, whether there are air bubbles in the pipeline, whether the signal cable is damaged, whether the output signal of the converter (ie, the input circuit of the rear instrument) is open. Remember to blindly overhaul the flowmeter. 3. Sensor inspection and testing equipment: 500MΩOne insulation resistance tester and one multimeter. Test steps: (1) When the pipeline is full of medium, use a multimeter to measure the resistance between terminals A, B and C. The resistance between A-C and B-C should be as large as equal. If the difference is more than 1 times, it may be due to leakage of the electrode, condensation water adsorption on the outer wall of the measuring tube or in the junction box. (2) When the lining is dry, use MΩInsulation resistance between A-C and B-C measured by meter (should be greater than 200MΩ). Then use a multimeter to measure the resistance between terminals A and B and the two electrodes in the measuring tube (should be in a short-circuit connected state). If the insulation resistance is small, it means that the electrode is leaking, and the whole set of flowmeter should be returned to the factory for maintenance. If the insulation has decreased but there is still 50MΩThe above and the inspection result of step (1) is normal, it may be that the outer wall of the measuring tube is damp, and a hot air blower can be used to dry the inside of the casing. (3) Use a multimeter to measure the resistance between X and Y, if it exceeds 200Ω, the excitation coil and its lead wires may be open circuit or poor contact. Remove the terminal board for inspection. (4) Check the insulation resistance between X, Y and C, it should be within 200MΩAbove, if there is a drop, use hot air to dry the inside of the casing. In actual operation, the decrease of coil insulation will lead to increased measurement error and unstable output signal of the instrument. (5) If it is determined that the sensor is faulty, please contact the manufacturer of the electromagnetic flowmeter. Generally, it cannot be solved on site, and it needs to be repaired by the manufacturer. 4. Converter inspection If it is determined that the converter is faulty, if there is no problem with the external reasons after inspection, please contact the electromagnetic flowmeter manufacturer directly, and the manufacturer will usually solve it by replacing the circuit board. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Common Maintenance and Maintenance of Domestic Electromagnetic Flow Meters'

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