- CAP
Summary
CAP question
In the first order process with dead time model (FOPDT), the process gain Kp is defined as:
CAP Answer
The correct answer is D, Kp = change in process variable (in percent of range)/change in controller output in (in percent of range).
The process gain indicates the relative change in process variable (PV) that results from the response to a change in the controller output (CO). Both PV and CO are expressed in percent of range to ensure the calculation is not dependent on the engineering units chosen.
Reference: Trevathan, Vernon L., A Guide to the Automation Body of Knowledge, Second Edition, ISA, 2006.
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