Transcription of INSTRUMENTATION AND CONTROL Module 7 Process Controls
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Department of EnergyFundamentals HandbookINSTRUMENTATION AND CONTROLM odule 7 Process ControlsblankProcess ControlsTABLE OF CONTENTSTABLE OF CONTENTSLIST OF ivLIST OF OF CONTROL 2 Automatic CONTROL 4 Functions of Automatic 4 Elements of Automatic 4 Feedback 6 CONTROL LOOP 7 Feedback CONTROL System Block 9 Process Time 13 Stability of Automatic CONTROL 16 TWO POSITION CONTROL 17 Two Position 18 Example of Two Position 19 Modes of Automatic 21 PROPORTIONAL CONTROL 22 CONTROL 22 Proportional 22 Example of a Proportional Process CONTROL 27 Rev. 0 Page iIC-07 TABLE OF CONTENTSP rocess ControlsTABLE OF CONTENTS (Cont.)RESET (INTEGRAL) CONTROL 28 Reset CONTROL (Integral).
PRINCIPLES OF CONTROL SYSTEMS Process Controls Terminology A control system is a system of integrated elements whose function is to maintain a process variable at a desired value or within a desired range of values. The control system monitors a process variable or variables, then causes some action to occur to maintain the desired system ...
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