Selection and application of flow measurement ranges
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SH/T3005-2016 Standard for the Selection and Design of Automation Instruments in Petrochemical Industries states something in 7.1.2; what does 0～10 square root mean? I’ve been completely puzzled by it.
This. . . . . . This one. . . . . . If you square these numbers, you’ll know it.
If it’s inconvenient to say it, just send a private message. I still don’t quite understand – the square root and the square are two different things, right?
After squaring, it becomes the range required by the standard. For example, 9.5 squared gives 90.25%, so the linear range corresponding to b) is 90%
9.52=90.25=90.25%? Shouldn’t the square root be taking a square root?
The flow rate is linearly related to the square root of the pressure difference. So there is such a square root; for example, if the flow ratio is 10:1, then the range of the differential pressure transmitter needs to be 100:1. This is how I understand it.
1. Full-scale reading is 0 to 10 root square； 2. The range reading for maximum flow rate should not exceed 9.5 ； 3. The range reading for normal flow should be 6.0～8.5 ； 4. The range reading for the minimum flow rate should not be less than 3. I didn’t understand the first point; then it’s even more confusing that the numbers 2, 3, and 4 don’t have the word “square root” after them.
The square root of 90.25% is 9.5/10, and the square of 9.5/10 is 90.25%… Ugh~~~~ it’s exhausting
This is understandable; the phrase “full-scale reading of 0 to 10 square root” refers to the square root of 10, not the square root of 1. .
The 1999 standard does not contain the term “square root”. So I don’t understand.
Stop trying to control yourself and go deliver food instead.