Yokogawa flowmeterIt can be used in various fields, but after prolonged use, some abnormal phenomena may occur, which can affect the measured data. The editor has summarized some issues and causes of malfunctions that may occur when using flow meters, hoping to be helpful to everyone. The analysis is as follows:
1. The output signal of the Yokogawa flowmeter is unstable and fluctuates greatly
Main reason: There is strong electrical interference; Sensor hardware malfunction; There is cavitation phenomenon in the pipeline; There is two-phase flow or pulsating flow in the medium inside the pipeline; The medium is not filled in the pipeline; There are foreign objects wrapped around the generating body of the flowmeter; The valves installed before and after the flowmeter have interference; Vibration of pipelines; The sealing gasket protrudes into the tube.
2. The measurement error of Yokogawa flowmeter is relatively large
Main reason: Instrument hardware malfunction. It is possible that the length of the straight pipe segments before and after is insufficient; There is a leak in the pipeline; The difference between the inner diameter of the instrument and the piping is too large; The fluctuation of power supply voltage is relatively large; Two phase flow or pulsating flow in the presence of a medium; When installing the meteor counter, the sealing gasket protrudes into the pipeline or is not concentric with the pipeline.
3. Yokogawa flowmeter has on-site display or signal output in the absence of medium flow
Main reason: The sensitivity design of the converter is too high; High frequency interference from strong electrical equipment; Poor grounding causes electromagnetic interference; Excessive vibration of the pipeline.
4. After the Henghe flowmeter is powered on, there is medium flowing through, but there is no signal output or on-site display
Main reason: Pipeline blockage; The actual flow value is too small and operates below the lower limit of the flow meter; Flow meter hardware malfunction, such as damaged amplifier board, disconnected power supply circuit, etc.
5. Leakage of Yokogawa flowmeter measuring pipe
Main reason: Incorrect selection of nominal pressure; The seal is damaged; The sensor has been corroded; The pressure inside the pipeline is too high.