This newly revised best-seller teaches the practice of process control for the wet process industries. It stresses the study of real, imperfect processes rather than system theory and gives guidance on how engineers can best apply their own experience, intuition, and knowledge of the particular process. The text summarizes the general characteristics of processes and control loops and discusses feedback control and its nuances. The latter part of the book addresses advanced control techniques. New topics covered in the book include tuning feedback control loops, multiplicative feedforward control, other control techniques (e.g., split-range control, cross-limiting control, floating control, techniques for increasing effective valve rangeability, and time proportioning control), and more. The reader will learn the bottom-line benefits of these advanced strategies. Examples from the commercial world are given. Suitable for beginning or experienced process control engineers.In many control schemes some type of computation using process variable or controller output signals is performed. For instance ... Every analog signal has both a signal value and an interpretation in engineering units. ... If the 02 transmitter is calibrated for 0-5% stack oxygen, then the interpretation of the signal in engineering units is obvious; 0% signal means 0% 02, 50% signal means 2 1/2% 02, etc.
|Title||:||Basic and Advanced Regulatory Control|
|Author||:||Harold L. Wade|
|Publisher||:||ISA - 2004|