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RT 542 Temperature control trainer



  • Experimental introduction to control engineering using an example of temperature control
  • Construction of the system with components commonly used in industry
  • Digital controller with freely selectable parameters: P, I, D and all combinations
  • Controllers configurable: Continuous controller, 2-point or 3-point controller
  • Integrated 2-channel line recorder1
  • Optional process control software RT 650.50 available
  • A complete networked system can be constructed with Profibus interface


Technical Description

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

A circulating pump delivers water within a closed circuit. The flow rate of water can be adjusted by a hand-operated valve. The loop also contains a screw-in heater, a heat exchanger with fan, and three integrated thermocouples for temperature measurement. Dead times can be represented by the use of different lengths of process delay. A thyristor power controller is used as the actuator. The controller used is a state-of-the-art digital industrial controller. It can be configured as a continuous or a switching device, and can activate the heater via the actuator and / or the fan. 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, configuration and parameterisation of the local industrial controller  
  * manually (by keyboard / controller software RT 450.14)
  * using the RT 650.50 process control software 
- control response to
  * switching control (2-point / 3-point controller)
  * continuous control 
  * dead times
- 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 532, RT 552): familiarisation  with and use of process control software (SCADA)


[1] trainer for control engineering experiments
[2] temperature control process, equipped with standard industrial components
[3] water circuit with pump, heater and 2 different lengths of process delay
[4] screw-in heater with dry-running protection and temperature limiter
[5] air/water heat exchanger with fan
[6] temperature measurement with thermocouples at multiple points 
[7] generation of disturbance variables by ball valve with scale in water circuit
[8] thyristor power controller as actuator
[9] digital controller, configurable as switching or continuous controller
[10] 2-channel line recorder
[11] process variables X and Y accessible as analogue signals via lab jacks

Technical Data

Pump, 3-stage
- max. power consumption: 70W
- max. flow rate: 3,6m³/h
- max. head: 4m 
Screw-in heater: 2kW
Heat exchanger: approx. surface area 2,8m²
- power output: 250W
- max. flow rate: 780m³/h
- max. differential pressure: 430Pa
- speed: 2880min-1
Thermocouple: type J: 0...200°C
Thyristor power controller max. load current: 25A
Line recorder 
- 1x 4...20mA, 1x 0...20mA
- feed rate 0...7200mm/h, stepped
- process variables X, Y as analogue signals: 4...20mA

Dimensions and Weight
LxWxH: 1000x700x1750mm
Weight: approx. 120kg Required for Operation

230V, 50/60Hz, 1 phase or 230V, 60Hz/CSA, 3 phases

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

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