Dynamic model thermometer

In this step it should be checked whether the most important assumptions are realistic. A simple experiment is to submerge the thermometer in a bath of warm water and wait until an equilibrium situation is obtained. Subsequently place the thermometer is a bath with water at room temperature and measure the change of temperature with time (the dynamic behavior) and compare it to the model results. The experiment should be repeated by placing the thermometer from the warm bath in air at room temperature. 

From experiments it can be shown that these values are realistic. In the second case in which the heat conduction is rate limiting, a more comphcated model will have to be developed, because temperature changes are fast and more model detail is required to capture this. If the thermometer is part of a larger system in which changes on a time scale of minutes are important, dynamic thermometer temperature changes are relevant in the first case, whereas in the second case these changes can be assumed to be instantaneous. 

The dynamic behavior is in agreement with the interpretation from the simple behavioral model as depicted in Fig. 1.5. The thermometer behaves like a first-order system with a mercury height which varies linearly with the temperature. 

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