Process Automation Guide

Multivariable loops are control loops in which a primary controller controls one process variable by sending signals to a controller of a di...

PRESSURE CONTROL LOOPS Pressure control loops vary in speed—that is, they can respond to changes in load or to control action slowly or quic...

Controllers are tuned in an effort to match the characteristics of the control equipment to the process so that two goals are achieved: is t...

The actions of controllers can be divided into groups based upon the functions of their control mechanism. Each type of contoller has advant...

The Instrumentation, Systems, and Automation Society (ISA) is one of the leading process control trade and standards organizations. The ISA ...

This section describes the instruments, technologies, and equipment used to develop and maintain process control loops. In addition, this se...

SIGNALS There are three kinds of signals that exist for the process industry to transmit the process variable measurement from the instrumen...