Simple Model for the Effect of Time Dependent Phenomena on Temperature Measurements on Heating Circuits.

On the basis of a simple model an attempt is made to calculate the so-called ″dynamic error of temperature measurement″ in a heating circuit. This error is caused by the finite time constant of the temperature sensor. It is found that during temperature increases the errors are basically negative, while during decreases the errors are basically positive. Averaged over a cycle, the two error components are partially compensated, and all the more so, the more symmetrical the heating and cooling processes and the greater the ratio of the cooling time to heating time in comparison to the time constant of the sensor.