<< Dochin Instrument (Shanghai) Co., Ltd. Focus on flowmeters and services >> Technical column Vortex flowmeter is a commonly used flow meter. The use of any instrument is inseparable from daily maintenance and maintenance. Whether it is its own fault or interference from external factors, we are calmly coping with the failure. Vortex flowmeters that are in long-term stable operation may also malfunction during operation. The causes of such failures are as follows: First, the failure of the detection side components and electronic components After a long period of operation, some electronic components may fail to reach the end of their life, causing the instrument to malfunction. Second, the damage of impurities in the medium After long-term work, the dirt in the fluid changes the adhesion and deposition of the inner wall of the measuring tube, the surface of the generating body and the inner wall of the instrument transformer, the surface of the generating body and the surface of the detecting element, and changes the geometrical parameters of the measuring tube and the generating body. The error is increased, the sensitivity of the detecting element is lowered, and the amplitude of the signal is reduced, thereby causing the failure of the detecting element. Third, lightning damage It is a common fault that field instruments are damaged by lightning strikes during the thunderstorm season. Lightning strikes induce transient high-voltage spikes and powerful inrush currents in the transmission line, breaking down or burning electronic components in the converter. This type of lightning strike is mainly introduced through power lines and signal lines. Fourth, environmental reasons Long-term corrosion of corrosive gases and moisture in the environment causes the insulation resistance of the detecting element to drop, and corrosion of some electronic components, terminals, and ground terminals, so that the contact resistance of the connector increases, and the transmission signal is attenuated.
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