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250 0 0.2 0.4 0.6 0 Ta = 21 Tt = 40 50 100 150 200 0 50 100 Time (s) 150 200 Heater level l Heater temperature Th Sample temperature Ts Target temperature Tt 1 0.8 Heater level Temperature (in ◦ C) Figure A.2.: Example output of the model simulator with parameters as given in the program source listing. After some oscillation, the system reaches an equilibrium state with Ts 6= Tt .