RT 542 Temperature control trainer

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.

  • 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 recorder
  • optional process control software RT 650.50 available
  • a complete networked system can be constructed with Profibus interface

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
Fan

  • 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

Controller

  • process variables X, Y as analogue signals: 4…20mA

 

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

  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
  • 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 532RT 552): familiarisation with and use of process control software (SCADA)

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Product number

RT 542