In a closed-loop process control system featuring negative feedback, what is the function of the error detector within the controller? |
A) The error detector computes the sum of the measured value of the controlled variable and the desired value (set point). |
B) The error detector computes the quotient of the measured value of the controlled variable and the desired value (set point). |
C) The error detector computes the difference between the measured value of the controlled variable and the desired value (set point). |
D) The error detector computes the product of the measured value of the controlled variable and the desired value (set point). |