Can Anyone Explain This Steam Engine Reading For Me

[RCP1991]

Hey, Guys

So, I've been having a bunch of difficulty getting TC to work on an AL 85 mod. I'm using a SS-316 0.15 ohm build and simply cannot get the thing to give me any vapor. I tried messing around with the TCR settings with pretty crappy results. Anyway, I saw this calculator on a page discussing temperature control. I don't understand the readout well but it seems to suggest that in order to hit ~420* which is what I have the TC set to, my coil will read around 0.20. So, I went into the menu and manually changed the resistance of the coil from 0.15 to 0.20. Once I did it, I started getting pretty decent vapes. Does what I did make sense? Am I completely misinterpreting the graph? Does making such an adjustment actually make the TC more efficient? Any risks?

Apologies for all the questions, I'm not a science minded person!

TCR

Temperature °C -73.3 -17.8 21.1 93.3 204.4 315.6 426.7 Resistance
Temperature °F -100 0 70 200 400 600 800
SS 316L / Elite 0.13437 0.143987 0.150167 0.161 0.175733 0.188732 0.200545
Ω
Total R by temperature 0.13437 0.143987 0.150167 0.161 0.175733 0.188732 0.200545
Normalized TFR curve 0.894808 0.958848 1 1.072142 1.170255 1.256818 1.335483

 

[Hawise]

I don't fully understand your situation, but I think I know what happened when you changed the resistance. Your mod doesn't actually measure the temperature of the coil. It measures the resistance, which goes up as the temperature rises, and uses it to calculate the temperature. By setting the resistance higher than it really is, you're throwing off the mod's calculations and making it think your coil is a lot cooler than it actually is. When you changed the resistance from 0.15 to 0.2, you essentially turned the temperature way up and are vaping at well above 420.

Think of it this way (all proceeding numbers are made up and bear no relation to reality):

Your actual resistance is 0.15. You hit fire, and your actual resistance climbs to 0.23, increasing by 0.8 ohm. However, your mod believes your initial resistance was 0.2, so it thinks the resistance has only gone up 0.3 ohm. Thus, it underestimates the temperature, and thinks it has to heat the coil more to get up to 420.

I hope this helps a little. I expect someone will be along soon with a more thorough answer.

 

[Beamslider]

You need to change the TCR value not the ohm. TCR for SS316 should probably be .00092. Changing that higher or lower will effect temperature too.

 

[Beamslider]

And that is a table you can download and use for a DNA chip. Don't know if the AL 85 lets you upload a table