The flow meter experiences severe fluctuations, and the PID control cannot stabilize it
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In 1920, the flow meter was installed behind the valve, at too short a distance; whenever the valve moved, the flow rate values fluctuated back and forth, making it impossible to control the flow rate – this served as a lesson
If not controlled properly, it also affects the accuracy of measurements
Is it because the requirements for the straight pipe sections before and after the flow meter are not met?
What medium are you testing here? It seems like a jacketed insulated tube is still being used
This post was last edited by lijie2007521 on 2022-5-10 15:14. The pipe is small, and the distance between the flow meter and the control valve is short; as a result, the feedback time for the medium upstream of the valve is relatively shorter when the valve operates. As a result, vibration occurs frequently. For mass flow meters, vibration and electromagnetic interference are the two factors that have the greatest impact on accuracy. Prolonged vibration can cause leaks or even damage to instruments and pipelines, and if the medium is under high pressure and corrosive, safety accidents may occur. It is recommended to make the corrections as soon as possible. This is why, when carrying out process piping work, it is necessary to communicate with instrument manufacturers and valve manufacturers to establish the requirements for piping installation.
The biggest mistake when installing flow meters is uneven disturbance of the medium inside the pipeline
The distance requirement between the upstream and downstream sections is not met, and the flow meter is not fully filled with fluid. It is best to have the flow meter at the front and the control valve at the back
It’s because your PID isn’t tuned properly that causes large fluctuations in traffic