API 550PT1SEC5 : 4ED 85
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
CONTROLLERS AND CONTROL SYSTEMS
09-01-1995
01-12-2013
Covers the application and installation of automatic controllers, control systems and programmable controllers. Definitions of control terms are provided, and controller types are described. A presentation of distributed control systems not user programmable is included. Modes of control in the refining industry are discussed along with an approach to tuning. Control applications, such as cascade and feedforward are also discussed, including digital blending systems. This publication is now out of print.
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