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Today, flowmeters, as instruments for measuring flow rate, are widely used in various industries such as the environmental protection sector, water treatment industry, chemical industry, and so on. There are also many types of flow meters, but every type has its own characteristics; so far, no flow meter has been found that can be used in all industries. But in any case, flow meter manufacturers must ensure the stability, accuracy, and safety of the flow meters, as well as provide timely solutions to any problems that may arise when customers use the products. Changzhou Chengfeng Flow Meter Manufacturer, as a brand in the flow meter industry with over 30 years of experience, is by any standard a leader among domestic flow meters. The use of flow meters requires great care; attention must not be neglected when it comes to their maintenance and accuracy assessment, before, during, and after use. Additionally, it is recommended that non-professionals avoid disassembling the flow meter to prevent affecting its accuracy. When using flow meters, various minor issues or faults may arise for different reasons. Once such problems are detected, they must be resolved promptly to ensure the normal operation of the flow meter going forward. So what principles need to be followed when making exclusions? 1. Before using an electromagnetic flowmeter, it is necessary to set its meter coefficient; generally, the factory-set value is used. It is important to check carefully to ensure that the flowmeter’s wiring is correct and that it is properly grounded before powering it on. 2. It is very important to maintain flow meters; they need to be cleaned, inspected, and recalibrated regularly. For flowmeters equipped with ports for injecting lubricant or cleaning fluid, lubricant or cleaning fluid should be injected regularly as specified in the instructions to ensure the proper operation of the impeller. 3. The condition of the display instruments must be checked constantly; the readings on these instruments should be evaluated, and any abnormalities should be investigated promptly. 4. At the same time, it is necessary to keep the filter of the flow meter unobstructed. When a filter becomes clogged with impurities, this can be detected by an increase in the difference between the pressure readings at its inlet and outlet. The blockage should be removed promptly; otherwise, it will significantly reduce the flow rate. 5. For high-volume trade settlement metering, to ensure the accuracy of the flow meter, it must be calibrated regularly. The site should be equipped with on-line calibration equipment, or with portable calibration devices; although the initial investment is high, it is worthwhile from a long-term economic perspective.