How to set the range of a orifice plate flow meter
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Dear teachers, here is a calculation sheet for the orifice plate flow meter. By how much should the range of the pressure difference transmitter and the DCS be adjusted?
Pressure difference: 6 kPa, DCS flow rate: 80,000 Nm3/h
Then take the square root of the pressure difference transmitter?
You can take the square root at the transmitter or at the DCS; you just need to remember that 4 mA equals 0 and 20 mA equals 80,000. Thinking too much will only make things more confusing. . .
The differential pressure transmitter has a range of 8 KPA; the value in DCS is 80,000 standard cubic units. It’s simplest to take the square root on the gauge, without having to fiddle with it in the DCS.:D
Differential pressure: 6 kPa; range: 80,000 bar. The square root value is the same whether it is calculated on-site or in the system. It seems to be a gas; pay attention to whether there is any compensation.
The range of the 0-6kpa gauge is 0-80000 as configured in the DCS