How is the measurement range of a mass flow meter determined?
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The maximum flow rate is 120 m3/h, the normal rate is 100 m3/h, and the minimum rate is 60 m3/h. So how is the measurement range of the flow meter selected and determined?
Choose a value that is slightly higher than the maximum flow rate; it should be more than 150 m3/h
Flow ratio = 120/60 = 2, which is not demanding. Evaluate the measurement accuracy at a normal flow rate of 100. The pressure loss is evaluated based on a maximum flow rate of 120; it is generally required to be less than 30 KPA (consult process engineers for details). The pipe diameter is roughly 3 or 4 inches
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Mass flow meter manufacturers have their own calculation software; just ask them to do the calculations.
It is desirable that the pressure loss at a flow rate of up to 120 m3/h be less than 2000 Pa