PCT51 is a visible and easy to understand water flow control process. Water stored in the sump tank is pumped through a parallel pipe arrangement mounted on the lid of the tank and returns to the tank via two outlets, a software switched divert valve prior to the flow-meter and a manually operated variable valve after the flow-meter. Both outlets also incorporate interchangeable orifices to vary their characteristics. Repeatable disturbances can be implemented using the solenoid valve and a wide range of different control investigations can be implemented using the interchangeable orifices and adjustable valves. The PCT51 is an ideal system for demonstrating the onset of instability, the importance of filtering on the sensor output, and the trade-off between filter weighting and proportional gain on stability. Demonstration Capability: - Flow control by varying pump speed: - Manual control flow (open loop) - On/Off control and flow (closed loop) - Proportional control flow (closed loop, P only and P+I) - Optimising proportional control of flow (closed loop P+I+D) - Direct control or Indirect control using an external controller

Flow Control