Thanks, Puff. But... I'm
still confused.
Let's
take our beloved Presa. The specs say that:
Our default setting is SS316. TCR value is 120 [what ????]
.
And you can try to use TCR mode and set the TCR value according to your coil’s material.
Material: TCR value range
Nickel: 600-700
NiFe: 300-400
Titanium: 300-400
SS(303,304,316,317): 80-200"
Soooo, per Phil, if your
device is tuned for a specific SS alloy, like ss316 for most TC mods, if you use a different alloy, your temperature reading will not be accurate unless you switch to TCR mode. But I see peeps using all kinds of ss alloys all the time, most often ss316L and and others, in regular ss mode (not TCR).

And then I read post like this one:
Temperature Coefficient of Resistance?
Somebody help me....