What is the correct way to use the resistance and temperature correlation formula from http://hyperphysics.phy-astr.gsu.edu/hbase/electric/restmp.html?
In particular, does R have to be the higher resistance and R0 the lower or vice versa? The resulting calculated dT differs depending on this choice of R and R0.
Quick example of what I mean:
Choose R = 7.97 and R0 = 7.28, copper a ~= .00393
dT = 24.1171
Choose R = 7.28 and R0 = 7.97, copper a ~= .00393
dT = -22.0292
I believe the answer is to use the former (always choose R and R0 so R > R0) because this more closely correlates with my lab data.