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RT 532 Pressure control trainer



  • Experimental introduction to control engineering using an example of pressure control1
  • Construction of the system with components commonly used in industry1  
  • Digital controller with freely selectable parameters: P, I, D and all combinations1
  • Integrated 2-channel line recorder1
  • Optional process control software RT 650.50 available
  • Construction of a complete networked system via Profibus interface possible


Technical Description

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

The air pressure control system is a 2nd order system. It comprises two in-line pressure tanks interconnected by a flow control valve. An additional valve on the second tank makes air tapping possible and so can be used to simulate a disturbance variable. A pressure sensor measures the pressure in the second vessel. The controller used is a state-of-the-art digital industrial controller. The actuator in the loop is a pneumatically operated control valve with a standardised current signal input. The controlled variable X and the manipulating variable Y are plotted directly on an integrated 2-channel line recorder. Alternatively, the variables can be tapped as analogue signals at lab jacks on the switch cabinet. This enables external recording equipment, such as an oscilloscope or a flatbed plotter, to be connected.

A process control software (RT 650.50) is optionally available. The software permits the construction of a complete networked system comprising multiple trainers from the RT 512 - RT 552 series. The key process variables can also 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
- real industrial control engineering components: controllers, transducers, actuators
- operation and parameterisation of the local industrial controller  
  * manually (by keyboard)
  * using the RT 650.50 process control software 
- control response to
  * 1st order controlled system
  * 2nd order controlled system
- investigation of disturbance and control response
- controller optimisation 
- investigation of the properties of the open and closed control loops
- processing of process variables using external equipment, e.g. oscilloscope or plotter
- together with accessory RT 650.50 and other trainers (RT 512, RT 522, RT 542, RT 552): familiarisation with and use of process control software (SCADA)


[1] trainer for control engineering experiments
[2] pressure control process, equipped with standard industrial components
[3] pressure measurement by pressure sensor 
[4] generation of disturbance variables by drain valve
[5] 2 pressure tanks with pressure relief valve and manometer for direct observation of the tank pressure
[6] valves permit investigation of a 1st order controlled system (1 tank) or 2nd order controlled system (2 in-line tanks)
[7] pneumatically operated control valve with electro-pneumatic positioner
[8] digital controller, parameterisable as a P, PI or PID controller
[9] 2-channel line recorder
[10] process variables X and Y accessible as analogue signals via lab jacks 

Technical Data

2 pressure tanks
- capacity: each 10L
- max. pressure: 10bar
- operating pressure: 6bar
Pressure sensor: 0...6bar
Pneumatically operated control valve
- connecting flanges: DN15
- Kvs: 0,1m³/h
- reference variable: 4...20mA
- stroke: 15mm
- characteristic curve equal-percentage
Line recorder
- 2x 4...20mA
- feed rate 0...7200mm/h, stepped
- process variables X, Y as analogue signals: 4...20mA

Dimensions and Weight
LxWxH: 1000x700x1750mm
Weight: approx. 110kg Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Compressed air: 3...8bar

Scope of Delivery
1 trainer
1 set of cables
1 hose
1 set of instructional material

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