The electromagnetic flowmeter’s performance is inconsistent
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The electromagnetic flowmeter’s performance is inconsistent – when it malfunctions, either the measurement values fluctuate greatly or they remain at a constant high value. If you ignore it, it usually returns to normal after some time. What could be the cause of this? Especially when starting the vehicle after it has been parked for a while, the above problems are most likely to occur
Gas-liquid two-phase flow, accumulation of static electricity, or changes in the electrical conductivity of the process medium
The measuring medium is only in the liquid phase and the tube is filled; the process medium is generally quite stable, so its conductivity should not change much
This type of malfunction is fairly common in electromagnetic flowmeters; upon on-site inspection, both the sensor and the converter appear to be in good condition. Generally, the issue is resolved after a power reset, and it is likely caused by dirt on the electrodes.
Check to see if the process hasn’t resulted in a full pipe
"Especially when the device is turned on after being parked for a while, the aforementioned problems are most likely to occur. This is because the medium isn’t very clean; dirty substances contaminate the electrodes after the device has been parked. After driving for a while, as the fluid washed away the dirt from the electrodes, the electromagnetic flowmeter returned to normal operation. This phenomenon is normal; simply wait for a while after starting up the process. If it is truly important, then the electrodes need to be removed and cleaned after shutting down the system.
I personally think the electrodes are the most likely to be contaminated; thanks for everyone’s advice
Clean the electrode and check again to see if these phenomena are present
After parking, dirty substances contaminated the electrodes. After driving for a while, as the fluid washed away the dirt from the electrodes, the electromagnetic flowmeter returned to normal operation. This phenomenon is normal; simply wait for a while after starting up the process. If it is truly important, then the electrodes need to be removed and cleaned after shutting down the system.
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