Vortex flowmeter troubleshooting
There are many detection methods for vortex flowmeters, and the difference between sensors and measurement circuits is also large. However, common faults of instruments have commonality. Several instrument faults and countermeasures are shown in the table.
Common troubleshooting of vortex flowmeters in use
1: Vortex flowmeter has the possibility of on-site display or signal output in the absence of medium flow: poor grounding, causing electromagnetic interference; high-frequency interference from high-voltage equipment; excessive vibration of the pipeline; excessive sensitivity of converter design
2: After the vortex flowmeter is energized, there is medium flowing, but there is no on-site display or signal output. Main reason: the flowmeter hardware is faulty, such as the power supply line is not connected, the amplification board is damaged, etc.; the pipeline is blocked; the actual flow value is too small, Run below the lower limit of the flowmeter
3: The output signal of the vortex flowmeter is unstable, and the jump is very large. The main reason is: sensor hardware failure; strong electrical interference; pulsating flow or two-phase flow in the medium; the vibration of the pipeline; the gasket protrudes into the tube; The installed valve has interference; the medium is not filled with the pipeline; there is cavitation in the pipeline; the flowmeter is entangled with debris
4: The error of vortex flowmeter measurement is relatively large. The main reason is that the instrument hardware is faulty; the length of the straight pipe before and after is insufficient; the fluctuation of the power supply voltage is relatively large; the flowmeter is installed differently from the pipeline, or the gasket protrudes into the pipeline; The difference from the inner diameter of the pipe is too large; there is a two-phase flow or a pulsating flow of the medium; the pipe has a leak
5: Vortex flowmeter measuring tube leakage main cause: the pressure inside the pipe is too high; the nominal pressure is not selected correctly; the seal is damaged; the sensor has been corroded
6: The main cause of the whistling sound of the vortex flowmeter sensor is that the medium flow rate is too fast, causing the flowmeter to vibrate strongly; the medium in the pipeline has cavitation; the flowmeter is loose.
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