PSN-L Email List Message

Subject: Re: Corrected tempco formula
From: Geoff gmvoeth@.........
Date: Sat, 17 Nov 2012 03:41:08 +0000


On 2012-11-17 3:32, Brett Nordgren wrote:
> Geoff:
>
> I was thinking somehow that copper had a negative temperature
> coefficient, which of course is wrong.
> The correct formula should be:
>
> RT2 = RT1*(1+(T2-T1)*0.00393))
>
> Resistance increases with temperature.
>
> Regards.
> Brett
>
>
>
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mucho gracious, yes, carbon has a reverse coeff.
too bad they are not identical or you might somehow
get a hybrid resistor which will stay the same
as temp changes. i shall assume T = kelvin or rankin
which are absolute but then as deltas that may not be
important.
are these formulas within the crc handbook ?
geoff


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