How should the boundary position be calibrated?
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For example, if the density of the light medium is 0.5 and that of the heavy medium is 1, with the pressure measurement points spaced 2 meters apart, how should the zero point and the range be determined?
Using the simplest calculation, it’s 10–20 Kpa
The key question is, what method do you use to measure the boundary position? Float, differential pressure transmitter, magnetostrictive?
Also waiting for an answer @seiluobin.
In the case of a completely low dielectric medium, that is, when the interface level is 0%, the zero-setting value is 4 mA; at this point, the reading of the differential pressure gauge is likely to be some value close to 10 kPa. It might not be either! You can denote this value as z – it is 4 mA. For full dense medium conditions, that is, when the level is at 100%, the calibration full scale is 20 mA; at this point, the value measured by the differential pressure gauge is likely to be some value close to 20 kPa. It might not be either! You can denote this value as s – it is 20mA. The corresponding value is z; for a differential pressure gauge, this represents the zero shift amount (s–z), which in turn corresponds to the range span of the differential pressure gauge
Additionally, when calculating the values related to the school boundary, it’s not possible to obtain accurate results; it is necessary to include additional data for the z and s values in order to carry out calibration. . There’s this guy who acts like a mathematician. Do you understand?
If it is a differential pressure transmitter, set 10–20 kPa to correspond to 4–20 mA and 0–100% range； Float wet gauge: the 0 point is calibrated when water is filled to a height of 1 meter, and 100% is calibrated when water is filled to a height of 2 meters.
To measure the level, it depends on whether you use a weighted barrel or a floating barrel; of course, differential pressure can also be used. It is best to use actual liquid calibration