How to maintain the electromagnetic flow meter?

Abstract: How to maintain the electromagnetic flow meter? The information is provided to you by the excellent manufacturers of flowmeters and flowmeters. How to maintain the electromagnetic flowmeter? The electromagnetic flowmeter is an inductive instrument that measures the volume flow of the conductive medium in the tube according to Faraday's law of electromagnetic induction. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is how to maintain electromagnetic flowmeters? Article details. How to maintain the electromagnetic flowmeter? The electromagnetic flowmeter is an inductive instrument that measures the volume flow of the conductive medium in the pipe according to Faraday's law of electromagnetic induction. It belongs to the domestic industry, and the technology has reached the domestic leading level. Electromagnetic flowmeters are used in a wide range of applications, such as measuring pulp and black liquor in the paper industry, ore pulp in the non-ferrous metallurgy industry, coal slurry in coal preparation plants, strong corrosive liquids in the chemical industry, blast furnace tuyere cooling water control in the iron and steel industry, and coal in long-distance pipelines. The flow measurement and control of hydraulic conveying, etc. First of all, we should pay attention to the following points about the maintenance of the electromagnetic flowmeter: 1. Daily maintenance only needs to perform periodic visual inspection 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 good, check Whether there is a new installation of strong electromagnetic field equipment near the meter or a new installation of electrical wiring across the meter. 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 When the flowmeter is put into operation or it is found that the instrument is not working properly after a period of normal operation, 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, and whether there are air bubbles in the pipeline. , Whether the signal cable is damaged, and 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, and 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 the manufacturer needs to be repaired. 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 our company, and generally solve the problem 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. 'How to maintain the electromagnetic flow meter? 》
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