nichrome resistance rises when firing?

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The electrical resistance of most metals rises as temperature increases.

Some metals (like nickel, platinum, and ss316 ) have "an accurate resistance/temperature relationship which [can be] used to provide an indication of temperature." You can see how this might be useful info if you are trying to put temp control in a mod. NiChrome's resistance does change with temp but not enough to measure accurately for temp control.

I assume that other factors having to do with temp-related expansion of the coil (fine defects, bad connection) or quality of the mod's electronics could be in play.
 

Vic Vape

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Oct 1, 2015
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Thanks fratervapor. My mod is fine with other tanks, it's the wismec theorem that may be wacky I think. I read that when they make heaters with nichrome, that they calculate the rise in resistance with heat. And that it can be a significant rise that has to be targeted in advance, to achieve the right output for the device. I still don't know what the hell too think lol. All I can say is the theorem is a pain in the but! Thanks.
 
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