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The Piping and Instrumentation Diagram Schematic of a control system –more detailed than process flow diagram –does not include values of parameters Used in conjunction with flow diagram parameters to produce a completely working process
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Line Types Connect different units in controlled system
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Identification Letters First letter represents parameter to be controlled, not the action used to control that parameter Second letter is the type of control device
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Actuator Symbols Used to activate process control equipment
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Transmitters Sensors used to measure parameters Send information to actuators to control process Location depends on application Set points, indicated by dots, show specific location
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Example http://www.driedger.ca/ce6_v&t/CE6_V&T.htmlhttp://www.driedger.ca/ce6_v&t/CE6_V&T.html Date Accessed: 9/5/07
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