The gas flow has stopped, so why does the flow meter still show a high reading?
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The gas flow has stopped, so why does the flow meter still show a high reading? Is there some kind of interference?
This is a systemic issue that requires an inspection of the entire circuit to determine the cause. First, it is necessary to ensure that nothing is flowing through the instrument’s measurement points, and then check whether there are any voltage stabilization mechanisms or other factors that might affect the readings
There may be the following situations: 1. It is related to the type of flow meter; it is necessary to determine whether it is a volume flow meter or a mass flow meter. Generally, gas mass flow meters are greatly affected by water vapor. 2. It is related to the medium flowing within the pipeline; it is necessary to determine whether there is flow of medium in the pipeline, whether in the forward or reverse direction. 3. It is related to interference; it is necessary to check whether the flow meter has large vibration sources such as motors, as well as electromagnetic interference. Generally, minor disturbances can be eliminated through small-signal rejection
First, check what type of flow meter you are using. Then verify whether there is indeed no flow of fluid in the pipe. Next, check if the zero point of the flow meter has shifted, and reset it if necessary
The questions should be specific and detailed, such as the type of flow meter and the medium being measured; it can’t be about differential pressure, right? :lol
1. First, check whether the manual valves before and after the flow meter are fully closed; if they are fully closed, the flow reading should be “0”. Of course, if a value is displayed at this time, it indicates leakage inside the valves used for isolation. 2. If no such leakage is detected, then check whether the zero point of the flow meter has shifted, and reset the zero point accordingly. 3. Verify whether there is any backflow of gas at the outlet end
It should be interference caused by pressure and temperature
From 2280 to 3100 – it changes within that range; it changes after some time passes. It seems like one of the modules is damaged; it was replaced today, and it seems to be fixed now
It is a zero drift issue related to the instrument’s measuring elements; the zero point of the instrument needs to be set again