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RT 614 Level Control Demonstration Unit



  • Experimental introduction to control engineering using an example of level control
  • Construction of the system with components commonly used in industry
  • Digital controller with freely selectable parameters: P, I, D and all combinations
  • Optional I&C software RT 650.40 via USB


Technical Description

This experimental unit provides a comprehensive experimental introduction to the fundamentals of control engineering using an example of level control.

All components are clearly laid out on a vertical panel. The large-format process schematic provides an aid to understanding. A pump delivers water from a storage tank into the transparent level-controlled tank. The level is measured by a pressure sensor installed at the base of the level-controlled tank. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is an electromagnetic proportional valve. A ball valve in the outlet enables 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.

The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- fundamentals of control engineering
- latest industrial control engineering components: controllers, transducers, actuators
- operation and parameter setting of a multi-functional 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
- together with accessory RT 650.40: 
familiarisation with and use of I&C software


[1] experimental unit for control engineering experiments 
[2] level control with transparent tank 
[3] level measurement by pressure sensor 
[4] generation of disturbance variables by ball valve with scale in outlet
[5] level-controlled tank with overflow and graduated scale
[6] control valve: electromagnetic proportional valve
[7] multi-functional digital industrial controller
[8] large process schematic on front panel
[9] process variables X and Y accessible as analogue signals via lab jacks

Technical Data

Storage tank
- stainless steel
- capacity: 15L
Pump, 3-stage
- power consumption: 100W
- max. flow rate: 70L/min
- max. head: 5,6m
Pressure sensor: 0...100mbar
Electromagnetic proportional valve: Kvs: 1,1m³/h
Controller: 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

Dimensions and Weight
LxWxH: 1000x500x1070mm
Weight: approx. 73kg Required for Operation 230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase

Scope of Delivery
1 experimental unit
1 set of laboratory cables
1 set of instructional material

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