Question: Several linear transmitters have been installed and calibrated as follows: (a) Develop an expression for the output of each transmitter as a function of its

Several linear transmitters have been installed and calibrated as follows:

pneumatic S transmitter 400 gal/min → 15 psig O gal/min -3 psig Flow rate: } → 20 mA →4 mA current 30 in Hg 10 in

(a) Develop an expression for the output of each transmitter as a function of its input. Be sure to include appropriate units.

(b) What is the gain of each transmitter? zero? span? Is the gain constant orvariable?

pneumatic S transmitter 400 gal/min 15 psig O gal/min -3 psig Flow rate: } 20 mA 4 mA current 30 in Hg 10 in Hg Pressure: transmitter 5 VDC voltage 1 VDC J transmitter 20 m Level: 0.5 m 10 VDC] voltage 1 VDC J transmitter Concentration: 20 g/L 2 g/L

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