Double-flange level gauge
Thread Content
When using a double-flange level gauge to measure the interface of a container, given that h = 2 m, the density of the light liquid being measured is 800 kg/m3, the density of the heavy liquid is 1000 kg/m3, and the density of the silicone oil inside the gauge’s capillary is 950 kg/m3, determine the gauge’s range and drift.
I didn’t expect that even installing a level gauge would require such complicated calculations; if you’re not good at math, you can’t work in the field of instrumentation. . . . ;P
Original poster, the range settings for the interface are as follows: zero point, 2*0.8*10=16kpa； Full scale: 2*1.0*10=20kpa. Since the bending of the capillary may affect pressure, it is recommended to ignore the density of the silicone oil for now; after installation, the zero point and range can be adjusted directly using the HART communicator. (Since the density of heavy media is the same as that of water, the container can be filled with water to calibrate the full scale, after which the zero point can be adjusted.)
How was this calculated? Is there a formula?
Original poster, actually the formula is the pressure difference at different heights of the material depending on its density. Remember: the pressure value at the full-scale height for the light component is zero, while the pressure value at the full-scale height for the heavy component corresponds to the full scale value.
Original poster, actually the formula is the pressure difference at different heights of the material depending on its density. Remember: the pressure value at the full-scale height for the light component is zero, while the pressure value at the full-scale height for the heavy component corresponds to the full scale value.