Transcription of INSTRUMENTATION AND CONTROL Module 7 Process Controls
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INSTRUMENTATION AND CONTROL Module 7 Process Controls
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.)
pump with a variable speed control (Figure 1). The feed rate of chemicals that maintain proper chemistry of a system is determined by an operator, who is not part of the control system. If the chemistry of the system changes, the pump cannot respond by adjusting its feed rate (speed) without operator action. IC-07 Page 2 Rev. 0
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