Which of the following is the definition of proportional band of a controller ?
Correct answer: C. The range of measured variables through which the air output changes from maximum to minimum
- A. The range of air output as measured variable varies from maximum to minimum
- B. The range of measured variables from set value
- C. The range of measured variables through which the air output changes from maximum to minimum
- D. Any of the above
- E. None of the above
Explanation
Proportional band is the range of measured-variable values over which the controller output moves through its full range, usually from minimum to maximum. Thus it is a range of the measured variable, not a range of air output itself.
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