The Control and Instrumentation Study Station uses industry-standard parts to teach industrial process control. It is an excellent tool to help train plant technicians and process control engineers.
Hot and cold water supplies connect to the study station. Two valves (worked by compressed air) control the flow of the water supplies into a process vessel. The process vessel has three jobs:
- A pressure vessel with a pressure-relief valve for safety
- A temperature-mixing chamber for the hot and cold water flows
- A liquid-level reservoir with a sight gauge
Transmitters on the pipework and process vessel send flow, level temperature and pressure signals to a patch panel. Other sockets on the patch panel connect to the valves and other instruments. The students use leads (included) with the patch panel to connect the instruments and valves for any particular experiment.
The two flow transmitters are differential pressure transmitters, connected across orifice meters. The hot flow transmitter normally connects to an orifice meter in the hot water inlet. A set of hand-operated two-way valves also allow it to connect to a third orifice meter in the drain pipe from the process vessel.
The study station includes two fully configurable controllers, each with remote or local set point inputs. The controllers are industry-standard, with a choice of different control methods, and fully adjustable proportional, integral and derivative (PID) circuits. Sockets on the patch panel connect to an electronic multi-channel recorder to log changes in process variables.