Description

The Cascade Process Trainer is designed to understand the elements of a cascade process technique and its control. It consists of two loops namely the flow loop (Inner or Slave loop) and the level loop (Outer or Master loop). The output of the primary (Level) loop will go as the setpoint of the secondary (Flow) loop. The setup is designed to perform Level, Flow and Cascade experiments. The setup consists of a process tank fitted with a level transmitter, an orifice to measure flow with a differential pressure transmitter and necessary drain valve arrangements. The inlet flow to the process tank is controlled by a control valve which operates on a 3 to 15 psi pressure signal. A current to pressure (I/P) converter is used to convert the output of the controller (4-20mA) to the signal pressure. The process parameters are controlled by a programmable logic controller. These units along with necessary piping are fitted on the support frame. The setup is designed for tabletop placement and access. The controller is connected to computer through USB for monitoring and controlling the process. User friendly software will be supplied along with the hardware to perform different set of experiments.

Features

• Open loop / Closed loop operation 
• Stability analysis
•  On/Off, P, PI, PD and PID control mode 
• MODBUS communication
• Open / closed loop / Auto tuning
• Empirical model Estimation
• User friendly GUI
• Single click data log, export features

Range of Experiments

• Level, Flow measurement and transmitter
  characteristics study

• Study of I/P Converter

• Open Loop Analysis

• Study of On/Off Control & Hysteresis

• Study of P Mode & Bias

• Study of PI Mode

• Study of PD Mode

• Study of PID Mode

• Empirical Model Estimation

• ZN Closed loop PID Tuning

• ZN Open loop PID Tuning

• Stability Analysis

• Study of Cascade Control