Regarding the calibration of boundary level gauges?
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(Note: the two media I have are water and oil.) Every time we try to calibrate the level gauge at the interface, the calibration doesn’t turn out very good – there’s a large discrepancy. This is because we’ve been using level-based calibration methods; we’re not very good at calibrating this type of level gauge. Is 0 point corresponding to water (0%), and 100% corresponding to oil? But how do they determine their height? Is it such that when it’s completely filled with water, the reading is 0, while oil gives a full reading from the start? ； In other words, the junction between them is full, and what lies below that is indicated by a water mark. Could an expert please explain?
LZ, what kind of meter do you use for measuring?
I’ve been using a mixture, which is why the calibration has always been inaccurate. Is there any good way to achieve more accurate calibration? . . How is my method?
First, you need to know the specific gravity of the oil, then calculate the pressure difference between them (which is related to the range you need), and use water to calibrate based on this pressure difference. After that, just install it and proceed with the transfer.
I agree with the idea of going upstairs; first, it’s necessary to know the specific gravity of the oil, then calculate the zero point and the range, and subsequently convert that into a height in terms of water columns in order to carry out calibration.
First, take a sample to determine the oil density and the center distance between the upper and lower flanges of the level gauge; calculate the range of the instrument and input it into the transmitter. If on-site calibration is required, the method varies depending on the type of instrument used.