Answer / anwar azim

Flow is propotional to sqare root of DP across the flow
element.Since this difference is very small the transmitter
is calibrated in the range mmWC.When the display is
according to range i.e 4-20mA FOR 0-2500MMwc tx shows flow
in mmWC.When one converts the range into engineering values
i.e 0-30TPH corresponding to 0-2500mmWC ,the tx show the
flow in TPH.The same can also be seen in percentage also.

Answer / ashish namdev

MMWC is a unit of differential pressure but TPH is a unit of flow rate.MMWC can be convert in flow rate
Q = ^P
  

How to calibrate DP tramitter in flow measurement application? consider my range of flow is 0 to 2000 kg/hr ? please give calculation of , How much pressure applied on low pressure side and high pressure side please give detail of calculation .... It so important for me please reply as soon as possible

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