Question: this is a PROCESS CONTROL & INSTRUMENTATION subject. Pls answer all subquestions tq c. The temperature of steam distillation plant is controlled by ON-OFF controller.

this is a PROCESS CONTROL & INSTRUMENTATION subject. Pls answer all subquestions tq

c. The temperature of steam distillation plant is controlled by ON-OFF controller. The heater is located at the bottom of the distillation tank with RTD is used to monitor the temperature of the plant. i. Draw a block diagram indicating all the components and variable in the system ii. Explain the operation of ON-OFF controller in this application. iii. Briefly explain the advantage and disadvantage of ON-OFF controller. iv. Suggest an improvement could be made to the system to prolong the life of the heater. [4 marks] [3 marks] [4 marks] [4 marks]

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