April 2009
Documenting skills is value-add
ISA certification provides an objective, third-party assessment, and confirmation of a person’s skills. It gives manufacturing and factory staff the opportunity to differentiate themselves from their peers and gain recognition. InTech covers two certification areas in this monthly Certification department.
ISA Certified Automation Professional (CAP) program
Certified Automation Professionals (CAPs) are responsible for the direction, design, and deployment of systems and equipment for manufacturing and control systems.
The following question comes from the CAP study guide, Performance Domain III, System Design, Design, specify, and procure the hardware/software used in the system
CAP question
How is PID defined in the phrase “PID control loop”?
A. Proportional Instrument Device
B. Piping Instrumentation Diagram
C. Percentage Integration Delta
D. Proportional Integral Derivative
CAP answer
The correct answer is D, Proportional Integral Derivative.
The PID term as described refers to the loop control technique used in controllers.
Proportional Integral Derivative is the correct term as referenced. A PID Control Loop includes proportional, integral, and derivative functions to control the process.
Reference: Erickson, Kelvin T. and Hedrick, John L., Plant-Wide Process Control (Wiley Series in Chemical Engineering) by Wiley, 1999.
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