Yokogawa mass flow meter operates on its own
Thread Content
The valves on both sides of the propylene flowmeter are closed; no loading is taking place, and it still shows readings on its own. Grounding and other measures have been taken. I hope experts can tell me what the cause of this is
What type of flow meter is it? Is there any vibration in the pipeline? Or is there still a medium between the two valves?
Yokogawa mass flow meter – there is also a medium inside it. This flow meter is designed for use in export shipments; if it’s not used in such shipments, the valve will definitely be closed, and the medium won’t flow
The pipeline is not vibrating; it is the flow meter itself that senses the vibration
The Yokogawa mass flow meter is a product developed after the patent on the Rosemount mass flow meter expired, and it has been around for only a short time. There are likely two explanations for this phenomenon: first, the valve closes after loading stops, causing the propylene in the flow meter to vaporize and leading to inaccurate measurements. The second issue is related to the damping or small-signal cutoff settings of the flow meter; try increasing the point damping slightly or raising the small-signal cutoff value. You can contact Yokogawa’s technical support staff by phone, and they will guide you through the debugging process over the phone. The above opinions are for reference only.
The Yokogawa mass flow meter is from Rose. It was developed after the patent protection for the Monté mass flow meter expired, and it has been around for only a few years. Vibration of the flow meter indicates that the measurement tube system is in operation; the possible causes of this issue are: first, the propylene within the flow meter vaporizes after the valve is closed, which affects the accuracy of measurements. The second is the damping or small-signal cutoff issue; increase the point damping or raise the small-signal cutoff value slightly. It is recommended to contact Yokogawa’s technical support staff, who can provide guidance via phone for the adjustments. The above suggestions are for reference only.
The residual propylene in the pipeline, due to vaporization, causes slugging within the pipeline, which is the reason for the abnormal readings of the mass flow meter. Thorough insulation of the pipelines and the flow meter itself reduces the tendency for movement within the pipelines significantly. The same issue occurs with mass flow meters from other manufacturers when measuring volatile liquids.
Check whether the inlet and outlet valves are stuck, observe the change in density, and see if the pipe is full or contains air. Then the sensor breaks. I have used Rosemont ones; I have not used Yokogawa ones. Check the zero point.
. Did this Japanese dog run around and dig by itself? . . Congratulations. . . That dog just runs around randomly, and it even tries to flirt with female friends. . .