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"Steinhart" vs "Steinhardt"
The correct name for the first author of the Steinhar[d]t-Hart equation is almost certainly Steinhart. I noticed that the name was not spelled consistently within Wikipedia. After considerable Google searching, it became evident that "Steinhart" is the correct spelling. I learned that "Hart" is Stanley R. Hart, still a Senior Scientist at Woods Hole Oceanographic Institute. Steinhart's full name, I believe, was John S. Steinhart, former Professor and Professor Emeritus at University of Wisconsin-Madison. See following links:
http://www.whoi.edu/science/GG/people/shart/publications.htm http://www.secfac.wisc.edu/senate/2004/0405/1775(mem_res).pdf
Coefficients
The coefficient D is referenced in the where clause, but is not present in the equation. Either the equation is incorrect or the where clause needs to be modified.
more data
I translated this article on the French Wiki, and put some calculation to use it. I let you import those equations from FR to EN (talking French is easier but not needed... it's math). (in French) Relation_de_Steinhart-Hart. Enjoy !
units
This equation doesn't make sense. You can't take the log of a resistance. You can only take the log of a dimensionless number. The datasheet I'm holding for some thermistors I'm using instead have R/R25 in the log - the ratio between the measured resistance and the resistance at 25 degrees celcius. The ratio makes it dimensionless, and without that it doesn't make sense - as it is in this article R cannot be resistance in Ohms. 118.139.33.247 ( talk) 05:21, 15 December 2009 (UTC)
Typical values and dimensions of coefficients
It might be useful to give some typical values of the coefficients A, B and C for a typical thermistor. Also, are the units of A, B and C simply Kelvin? — Preceding unsigned comment added by 130.246.121.103 ( talk) 09:27, 29 July 2016 (UTC)
This curve-fitting formula is basically a polynomial regression with missing 2nd order term. Omitting 2nd order term and adding 3rd order term makes no sense to me. I've tested this on a number or NTC sensors I work with, and they all consistently give better approximation with instead of , and even better of course when both are used. I would seriously question scientific credibility of this article and/or original paper. Also, I would question significance of this formula - this is just an inferior special case application of a well known approximation method. Shcha ( talk) 16:49, 9 April 2018 (UTC)
![]() | This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||
|
"Steinhart" vs "Steinhardt"
The correct name for the first author of the Steinhar[d]t-Hart equation is almost certainly Steinhart. I noticed that the name was not spelled consistently within Wikipedia. After considerable Google searching, it became evident that "Steinhart" is the correct spelling. I learned that "Hart" is Stanley R. Hart, still a Senior Scientist at Woods Hole Oceanographic Institute. Steinhart's full name, I believe, was John S. Steinhart, former Professor and Professor Emeritus at University of Wisconsin-Madison. See following links:
http://www.whoi.edu/science/GG/people/shart/publications.htm http://www.secfac.wisc.edu/senate/2004/0405/1775(mem_res).pdf
Coefficients
The coefficient D is referenced in the where clause, but is not present in the equation. Either the equation is incorrect or the where clause needs to be modified.
more data
I translated this article on the French Wiki, and put some calculation to use it. I let you import those equations from FR to EN (talking French is easier but not needed... it's math). (in French) Relation_de_Steinhart-Hart. Enjoy !
units
This equation doesn't make sense. You can't take the log of a resistance. You can only take the log of a dimensionless number. The datasheet I'm holding for some thermistors I'm using instead have R/R25 in the log - the ratio between the measured resistance and the resistance at 25 degrees celcius. The ratio makes it dimensionless, and without that it doesn't make sense - as it is in this article R cannot be resistance in Ohms. 118.139.33.247 ( talk) 05:21, 15 December 2009 (UTC)
Typical values and dimensions of coefficients
It might be useful to give some typical values of the coefficients A, B and C for a typical thermistor. Also, are the units of A, B and C simply Kelvin? — Preceding unsigned comment added by 130.246.121.103 ( talk) 09:27, 29 July 2016 (UTC)
This curve-fitting formula is basically a polynomial regression with missing 2nd order term. Omitting 2nd order term and adding 3rd order term makes no sense to me. I've tested this on a number or NTC sensors I work with, and they all consistently give better approximation with instead of , and even better of course when both are used. I would seriously question scientific credibility of this article and/or original paper. Also, I would question significance of this formula - this is just an inferior special case application of a well known approximation method. Shcha ( talk) 16:49, 9 April 2018 (UTC)