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- Title
Eigenerwärmung von Widerstandsthermometern für Lufttemperaturmessungen bei Impulstromspeisung.
- Authors
Marin, Sebastian; Pätz, Joachim; Fröhlich, Thomas
- Abstract
Very precise air temperature measurement in meteorology or in air-conditioned indoor rooms is challenging, because radiation influences and the self-heating of the resistance thermometers are sometimes considerable disturbing influences. In our paper we consider a special current supply and show that it can reduce the self-heating to less than one millikelvin. For a typical sensor design, which is suitable and usual for outdoor use in meteorological weather stations simulations of the static and dynamic self-heating caused by the pulsed electric measuring current are carried out. The transient course of the self-heating depends more on the internal structure of the sensor than on the heat transfer coefficient to the surrounding still air. The average static self-heating from a highly simplified model fits the simulated transient response well. The method of pulse current driving is shown by the described simulations to be very effective for the reducing the self-heating of resistance thermometers.
- Publication
Technisches Messen, 2021, Vol 88, Issue 9, p556
- ISSN
0171-8096
- Publication type
Academic Journal
- DOI
10.1515/teme-2021-0032