Closed-loop Liquid-level and Flow-rate Control
The Closed Loop Liquid-level and Flow-rate Control training system is an applied control technology experiment designed specifically for training and real life applications. The compact training unit contains a liquid reservoir, a pressure transducer to detect the actual liquid level as well as a reserve tank including pump. To achieve constant pumping power, a secondary control loop with a flow-rate meter is integrated, although it can also be disconnected. Disturbance variables can be simulated using adjustable throttle valves, which modify the inlet and outlet flows at the liquid reservoir. As an option, a second liquid reservoir can be included to assemble a controlled system with time delays of the second-order time delays.
Training Concepts:
  • Parameters of controlled system
  • Design and function of closed control loop
  • Two-position controller in an integral-action controlled system
  • Two-position controller in a controlled system with higher order time delay
  • Disturbance response of control loop
  • Automatic liquid level-control with continuously operating PI/PID controller
  • Automatic liquid level-control with secondary flow-rate control loop
  • Automatic liquid level-control in a system with higher order time delay
Product: Closed-loop Liquid-level and Flow-rate Control
Product Code: IAC 10/11

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