Book: Process Dynamics and Control, Third Edition or Fourth Edition, by D. E. Seborg, T. F. Edgar, D. A. Mellichamp, F. J. Doyle III, John Wiley & Sons, Inc, 2011
A pH probe has a range of 2 to 10 pH units, and a transmitter converts the pH units into a 4 to 20 mA signal.
(a) What are the zero and span for the probe?
(b) Determine the gain of the probe/transmitter unit.
(c) Determine the transmitter output if the pH of a solution is 5.0.
(d) If the transmitter gives a reading of 11 mA, what is the pH of the solution?
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