Problem of using differential pressure to measure liquid level
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Open containers are used on-site, with differential pressure transmitters employed to measure the liquid level; the low-pressure side is connected to the atmosphere. According to the measurement principle, the height is determined based on the measured pressure. However, generally the bottom of the container is taken as the zero point, while the top is the highest liquid level; as a result, the pressure measured is indeed highest at the bottom and lowest at the top. Does this mean that the settings need to be adjusted again in the secondary instrument?
When the liquid level is at its highest, the pressure detected by the differential pressure transmitter is also at its highest; when the liquid level is at its lowest, the pressure is at its lowest as well. No adjustment is required.
Yes, when using a differential pressure transmitter to measure liquid level, with the bottom of the container serving as the zero point and the top as the highest point of the liquid level, the pressure measured is highest at the bottom and lowest at the top; therefore, it needs to be reset in the secondary instrument. Under normal circumstances, the pressure corresponding to the highest liquid level should be set at 100%, that is, the full scale value ； The pressure corresponding to zero should be set at 0%, that is, a zero value. Based on the measurement principle, after adjusting the instrument settings, the height of the liquid level can be accurately determined using the measured pressure. .
The differential pressure transmitter is used to measure liquid level; when there is no liquid, the transmitter experiences no force and its output is at its minimum. At the highest point of the liquid level, the transmitter experiences the greatest force and its output is at its maximum. By setting the parameters appropriately in the display instrument, this can be managed
It doesn’t seem to be an undercover agent from our field{:3_48:}
Thank you all for your professional answers; I now have a general understanding of this