Issues with adjusting the range of differential pressure level gauges
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For differential pressure level gauges used in water transportation, our range was calculated based on water, and we forgot to change it back. Therefore, after the material is fed in, the differential pressure level does not match the magnetic flap level on site. How can it be adjusted back to alignment? It got mixed up with the amount of migration, right? ? I need a detailed explanation; I’m not very good at this!
The range is set to that of the changing medium density; the migration amount does not need to be changed
If the density of the medium being measured is several times that of water, then the upper range limit of the transmitter
If conditions permit, abandon the calculation method and use the actual full tank measurement range. Once the tank is filled, the current pressure difference represents the full level. The difference from zero is the range
You’ve filled it up completely yet you leave it empty – such a process; they won’t agree to it.:funk:
The original poster made a mistake in calculating the range; that is, the full scale value was incorrect, but it wasn’t said that the zero point was wrong, so there’s no need to enter a value for it. Even if it’s not possible to complete the whole process, it’s acceptable to do half of it or reach a point that is suitable for calculating the process; there’s no need to insist on completing it entirely. Of course, it’s more convenient if the whole process can be completed. .
The main issue is that we don’t even know the amount of data to be migrated! Knowing only the range is useless! Migration is performed when the tank is empty; the URV-LRV corresponds to the differential pressure range. If I want to make changes now, I don’t know the upper and lower limits – only the range is known! What to do
No matter how you calculate it based on water, or based on the actual materials, it’s the same result.
Due to the difference in density between water and the medium being measured, the range becomes incorrect; adjust the range potentiometer when the liquid level is at its highest to match the actual liquid level...
There is no need for movement during migration; migration refers to the pressure difference resulting from the high density of silicone oil. The flange spacing remains unchanged, as does the amount of migration. For the range of pressure, it is 1.0 for water. By calculating based on the density of the current medium, for example, if the density is 1 meter, then the pressure for water is 10 KPa; if the density of the current medium is 0.8, then the pressure range will be 8 KPa. Compared to magnetic flip plates, the current indication is lower, which means the density of the medium is lower than that of water. Conversely, the density of the medium is higher than that of water
The main issue is that the differential pressure sometimes experiences zero drift; after calibration, it changes again after some time, and it may need to be recalibrated once more before it can be used properly. . If we go by the previous migration volume, that means the lower differential pressure limit LRV remains unchanged; then, based on the density of the medium, we can calculate the actual range and thus determine the URV, right? But will such a measurement be accurate?