RT 674 Flow / level control demonstration unit

The experimental unit provides a comprehensive experimental introduction to the fundamentals of control engineering using an example of combined flow and level control. The level and flow rate can be controlled individually and as a cascade. In cascade mode the level is the primary controlled variable. The flow control then provides optimum adjustment of the controlled variable to the reference variable (setpoint).

All components are clearly laid out on a vertical panel. The large-format process scheme provides an aid to understanding. A pump delivers water from a storage tank into a piping system which contains a rotameter. From there the water passes into the transparent level-controlled tank. The level is measured by a pressure sensor installed at the base of the level-controlled tank. The controllers used are two state-of-the-art digital industrial controller. The actuator in the control loop is an electromagnetic proportional valve. Ball valves in the tank outlet and in the pipe system enable defined disturbance variables to be generated. The controlled variable X and the manipulating variable Y can be tapped as analogue signals at lab jacks. This enables external recording equipment, such as a plotter or an oscilloscope, to be connected.

An instrumentation and control software (RT 650.40) with interface module (USB) is available as an accessory. This enables the key process variables to be represented, and control functions executed.

  • experimental introduction to control engineering using an example of flow and / or level control
  • two controllers permit control in cascade mode
  • construction of the system with components commonly used in industry
  • digital controllers with freely selectable parameters: P, I, D and all combinations
  • optional I&C software RT 650.40 via USB

Storage tank

  • stainless steel
  • capacity: 15L

Pump, 3-stage

  • power consumption: 90W
  • max. flow rate: 83L/min
  • max. head: 6m

Pressure sensor: 0…100mbar
Rotameter with electrical output: 0…600L/h
Electromagnetic proportional valve: Kvs: 1,1m3/h
2x controllers: parameterisable as P, PI or PID controller
Process variables as analogue signals: 0…10V
Connection of external recording devices (e.g. oscilloscope, line recorder) via lab jacks

 

230V, 50Hz, 1 phase
230V, 60Hz, 1 phase
120V, 60Hz, 1 phase

  1. experimental unit for control engineering experiments
  2. level and flow control individually, and cascaded
  3. level measurement by pressure sensor
  4. flow rate measurement by rotameter with electrical output
  5. generation of disturbance variables by ball valves with scale
  6. tank with overflow and scale
  7. control valve: electromagnetic proportional valve
  8. 2 digital industrial controllers, parameterisable as P, PI or PIDcontrollers, cascade
  9. large process schematic on front panel
  10. key process variables accessible as analogue signals at lab jacks
  • fundamentals of control engineering
  • latest industrial control engineering components: controllers, transducers, actuators
  • operation and parameter setting of a multifunctional state-of-the-art digital controller: e.g. parameter setting as P, PI and PID controller
  • investigation of disturbance and control response
  • influence of different controller parameters on stability and control quality
  • investigation of the properties of the open and closed control loops
  • processing of process variables using external equipment, e.g. plotter or oscilloscope
  • investigating the response of the various controlled systems
  • control of
    • flow rate
    • level
    • level via flow rate (cascade)
  • together with accessory RT 650.40: familiarisation with and use of I&C software

Web offer

add product
Request for Quotation

Product number

RT 674

RT-674

Download view