I don’t understand the requirement regarding the root square of the flow rate
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This post was last edited by sanjjj on 2017-4-12 09:38
Such a requirement is to ensure measurement accuracy; calculations show that at 1/3 of the flowmeter’s range, the differential pressure is only 1/9 of the maximum differential pressure.
For example, if the pressure difference range is 0-10, with a maximum pressure difference of ≤9.5 and a minimum pressure difference of ≥3, and the operating pressure difference lies between 6.0-8.5, then the flow rate obtained after calculating the square root of these values will meet the requirements… The main consideration here is linear error
Thank you! If my range is 200----0 Pa, how should I understand that? ? Thank you!
For the differential flow rate related to square root operations, small-signal rejection is usually implemented. There’s no other choice – even the slightest fluctuations in pressure difference near zero can cause significant variations in flow rate. It’s quite generous of process engineers not to overwork the instrument technicians; especially during the startup of the plant, those instrument technicians really have a tough time. Hehe… Since there’s no other way, small-signal rejection is used, hehe. . . The meter reader finally had some time to drink water.