In the ISA tag PIC-21, the P stands for:

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Prepare for the CWEA Electrical/Instrumentation Level 3 Test with detailed questions and explanations. Enhance your knowledge with flashcards and multiple-choice questions tailored to your study needs!

Multiple Choice

In the ISA tag PIC-21, the P stands for:

Explanation:
In ISA tagging, the first letter of a three-letter tag identifies the process variable being measured or controlled. P stands for pressure. The full tag PIC expands to Pressure Indicating Controller, where P = pressure, I = indicating, and C = controller. The dash and number (PIC-21) simply identify the loop number, not the variable. So the P in PIC-21 signifies pressure, not positive, process, or proportional.

In ISA tagging, the first letter of a three-letter tag identifies the process variable being measured or controlled. P stands for pressure. The full tag PIC expands to Pressure Indicating Controller, where P = pressure, I = indicating, and C = controller. The dash and number (PIC-21) simply identify the loop number, not the variable. So the P in PIC-21 signifies pressure, not positive, process, or proportional.

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