This trainer provides a comprehensiveexperimental introduction to the fundamentals of control engineering using anexample of temperature control. A circulating pump delivers water within aclosed circuit. The flow rate of water can be adjusted by a hand-operatedvalve. The loop also contains a screw-in heater, a heat exchanger with fan, andthree integrated thermocouples for temperature measurement. Dead times can berepresented by the use of different lengths of process delay. A thyristor powercontroller is used as the actuator. The controller used is a state-of-the-artdigital industrial controller. It can be configured as a continuous or aswitching device, and can activate the heater via the actuator and / or thefan. The controlled variable X and the manipulating variable Y are plotteddirectly on an integrated 2-channel line recorder. Alternatively, the variablescan be tapped as analogue signals at lab jacks on the switch cabinet. Thisenables external recording equipment, such as an oscilloscope or a flatbedplotter, to be connected.