Level control of one and two capacity processes and flow control

The Process Control Model UV 150 is a complete process unit including control loops with possibilities to be controlled by a multi loop controller or a personal computer.
The control system is a combination of RIB´s control models UV103 and UV200 with great extension. The standard controller on the model is Honeywell UDC 6000, a very advanced microprocessorbased multiloop controller with two complete PID controllers and feed forward adder/multiplier. The controller is equipped with four analogue inputs, two mathematic blocks, x/y characterizer (8 segments), gain scheduling, deadtime algorithm, polynomial characterizer of fifth order.
All inputs are equipped with ratio/bias functions and each controller is equipped with two complete PID algorithms. In addition to all this, the controller includes all facilities described in the UV103 pamphlet.The control equipment consists of a complete level control loop which is switchable for one respective two capacity control, a flow control loop with magnetic flow transmitter and a partial simulated delay of the disturbance with a time relay and a solenoid valve.UV 151 is the same training unit as UV 150 except that the panel mounted controller and recorder has been removed. UV 151 is to be used together with UV 720 or UV 730.


Laboratory exercises

  • Configuration of the controller.
  • Adjustment of the level transmitter.
  • Adjustment of the flow transmitter. Examination of single capacity and two capacity processes and measurement of the time constants.
  • Step response and ramp response from P-, PI-, PD- and PID-controller and measurement of P-gain, I- time and D-time.
  • Automatic control of one capacity process using P-, PI-, PD- and PID-controller.
  • Automatic control of flow process.
  • Optimum settings of the controller constants according to the established methods of one and two capacity level control loop and flow control loop.
  • Frequency analysis of the different level control loops and optimum settings using serial compensation in the Bodediagram of P-, I- and PDP- networks (algorithms).
  • Automatic control using different control equations.
  • Set Point ramping
  • Unlinear control using more than one PID-sets.
  • Control characteristics for the flow control loop.
  • Linearization using parameter control.
  • Gain scheduling
  • Characterization of the control valve characteristics.
  • x/y linearization and characterization.
  • Training in using different mathematic programs for manipulating of PV and SP.
  • Cascade control using multiloop controller.
  • Starting up exercises.
  • Optimum settings of the controller constants.
  • Static and dynamic feed forward using deadtime algorithm.
  • Control using simple process model.
  • Three element control. Auto tuning – Accutune.
  • The influence of damping on the control performance.
  • Influense of the sampling period on the control loop