A differential pressure transmitter is calibrated 0 to 80 inches of water and transmits a 4 to 20 mA dc signal. This transmitter is placed across an orifice plate which is sized to create 80 inches of water differential 6 gallons per minute. What is the flow rate when the signal is 13 mA dc?
A. 4.5 gpm
B. 3.9 gpm
C. 3.4 gpm
D. 4.9 gpm
Answer:A
A differential pressure transmitter is calibrated 0 to 80 inches of water and transmits a 4 to 20 mA dc signal. This transmitter is placed across an orifice plate which is sized to create 80 inches of water differential 6 gallons per minute. What is the flow rate when the signal is 13 mA dc?
A. 4.5 gpm B. 3.9 gpm C. 3.4 gpm D. 4.9 gpm