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Like ordinary instruments, before an electromagnetic flowmeter is put into operation after installation and wiring are completed, it is necessary to check whether the installation and wiring are correct and whether the instrument can function properly. It must be emphasized here that for some units lacking operational experience, the personnel responsible for instrument installation and operation should carefully read the technical instructions provided in the relevant installation and operation manuals, and be adept at analyzing and reflecting on the problems encountered during the initial operation. Electromagnetic flowmeters feature advanced circuit design, low power consumption, a wide measurement range, simple structure, low pressure loss, durability, wide applicability, long service life, stable operation, and ease of installation and calibration. It is mainly used for measuring the flow rate of fluids in industrial pipelines, such as gases, liquids, vapors, and various other media. The entire set has been adjusted and calibrated on the flow calibration device at the manufacturing plant; all that is needed is to verify that the part numbers of the sensors and converters as well as the instrument coefficients are correct, and it can generally be put into operation without any further adjustments. Mess up the entire set of instruments that had been adjusted properly. Before putting an electromagnetic flowmeter into operation, the sensor must be filled with the actual medium to be measured, and a zero adjustment should be performed while it is at rest after power is applied. After it is put into operation, it is also necessary to periodically stop the flow and check the zero point based on the medium and operating conditions. This is especially true for media that tend to precipitate or get contaminated, as well as non-clean media containing solids; more inspections should be carried out during the initial phase of operation in order to gain experience and determine an appropriate regular inspection schedule. For qualified users, several basic parameters of the sensor should be measured and recorded before the instrument is put into operation. ①Insulation resistance of the electrodes (for sensors when the tube is empty: the insulation resistance between the two resistors and the instrument housing or between them and ground) ； ②Insulation resistance of the excitation coil (insulation resistance of the excitation coil relative to the instrument enclosure or ground) ； ③Cold resistance value of the excitation coil (i.e., the copper resistance value of the enameled wire in the excitation coil) ； ④The contact resistance sensor of the electrode is filled with liquid, and it measures the resistance value between the electrode and the ground terminal; the contact resistance values of the two electrodes should be roughly the same. In addition to measuring the volumetric flow rate of ordinary conductive liquids, sewage flow meters can also be used to measure the volumetric flow rate of highly corrosive liquids such as strong acids and strong bases, as well as of homogeneous liquid-solid suspension fluids like sludge, pulp, and paper pulp. It is widely used for flow measurement in various industrial sectors such as petroleum, chemicals, metallurgy, light textiles, papermaking, environmental protection, and food processing, as well as in areas like municipal management, water conservancy construction, and river dredging. These data are very useful for analyzing the reasons behind sensor failures after they have been in operation for a period of time. The electromagnetic flowmeter is a new type of flow measurement instrument that developed rapidly in the 1950s and 1960s alongside the advancement of electronic technology. An electromagnetic flowmeter is an inductive instrument manufactured based on Faraday’s law of electromagnetic induction, used to measure the volumetric flow rate of conductive media within a pipe. For example, when the contact resistance between the two electrodes changes, it indicates that the electrodes are likely to be contaminated ； The contact resistance has increased; the contamination is likely insulating deposits ； The contact resistance has decreased; the contamination is likely a conductive deposit ； The asymmetric contact resistance between the two electrodes indicates that they are contaminated to different degrees ； A decrease in the insulation resistance of the electrodes and excitation coils indicates the degree to which the sensor is damp (in other words, the extent to which moisture has penetrated the device) ； When the insulation resistance drops to a certain level, it will affect the proper operation of the instrument. The cold resistance value of the excitation coil is a parameter that ensures its proper operation. For more information, please visit the company’s official website at http://www.yb1518.com/. Please keep this link when reproducing the content!