A batch operation is used to heat a liquid to a specified

Chapter 22, Problem 22.4

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A batch operation is used to heat a liquid to a specified temperature. There is a start button, a stop button, inlet/outlet valves, and limit sensors for low tank level (LL) and high tank level (LH). Flow is performed by gravity transfer. The process steps are (a) Push the start button to start the process. (b) Fill the tank up to LH by opening an inlet valve with the exit line closed. (c) Heat the liquid to the temperature set point while stirring. (d) Turn off the stirrer and empty the tank down toLL by opening the exit valve (but the inlet valve must be closed). Draw an information flow diagram, sequential function chart, and ladder logic diagram.

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