Adjusting watt in Temp mode with clapton

[LiquidScale]

Hi guys,

currently running OBS Engine with Clapton SS316L 26 awg core and Kanthal A1 32 awg outter on my Smok Alien.

Running in Temp ss mode on, 200 Celsius with power of 70 watts. The coils are 3 mm diameter dual coil resulting in 0,264 ohms.

Do you think it's okay build for the temp mode? The tcr number is 0,00105 and that's where I lost. This number is default by Alien, but I would like to get to the best settings.

Could you please give me any advices to adjust it properly?

Thanks a lot!

 

[Heartsdelight]

Hi guys,

currently running OBS Engine with Clapton SS316L 26 awg core and Kanthal A1 32 awg outter on my Smok Alien.

Running in Temp ss mode on, 200 Celsius with power of 70 watts. The coils are 3 mm diameter dual coil resulting in 0,264 ohms.

Do you think it's okay build for the temp mode? The tcr number is 0,00105 and that's where I lost. This number is default by Alien, but I would like to get to the best settings.

Could you please give me any advices to adjust it properly?

Thanks a lot!

Don't use temp control since your coil isn't all stainless steel, your outer wrap is kanthal.

 

[Heartsdelight]

Read this:
https://www.djlsbvapes.com/different-wires/

 

[Brad Mitchell]

My assumption would be that you can use temp control since the core is stainless. Everything I have read says the outer wrap doesn't matter or it matters very little.

 

[LiquidScale]

I thought that the most important is the core too ... ...

 

[Rabbit Slayer]

It should be fine in TC mode, but cant help with the tcr. I've been lucky, SS mode works fine for my coils

 

[HondaDavidson]

The core is what matters..... unless the ohm of the wrap is low enough to approach that of the core. ... ie. like nickel wrapped Kanthal.. could be an issue.

Start. With the default TCR... then try setting above and below that too see what works best.

For wattage on TC I use Ss... I start with about 5-10% more than I would use in VW.


Sent from my SCH-I605 using Tapatalk

 

[LiquidScale]

Could you please explain to me the tcr number? Higher means that coil is more sensitive to the change of resistance?

Because I am not able to recognize if the temp is really for example 220 degrees of Celsius... Sometimes it shows me temp protected but I think it's not true. And with some tcr setting it even can't reach temp which I set.

 

[Eskie]

The TCR for 316L is 92. You can easily change that on the Alien. The mod showing temp protected is not an error, it's an indication TC is doing what you want and protecting you from temps higher than you set for. The bottom line is how is the vape with your current settings?

 

[Angrygod50]

Much like water electrons take the path of least resistance.
The SS core is much lower resistance than the Kanthal wrap so the core is were the current will flow.

 

[bmclaurin]

Could you please explain to me the tcr number? Higher means that coil is more sensitive to the change of resistance?

If you were to make a chart for your coil that plots temperature (in Celsius) on the horizontal axis versus resistance on the vertical axis, then TCR would be the slope of the resulting curve at a given point. In other words, it tells you the rate of change in resistance of the coil for a given change in temperature. The larger the TCR, the steeper the slope of the curve, and therefore the more sensitive the resistance of the coil to changes in temperature. All other things being equal, larger TCR's generally allow for more accurate temp control, but it is entirely dependent on the chemistry of the materials used.

It is worth noting that the curve is not entirely linear. So the slope of the curve changes depending on where you are on that curve. It is steeper in some spots and shallower in others. But TCR is a measure of the slope at a single point on that curve. For that reason, in theory at least, the further away the actual temperature of your coil is from the temperature that correlates with the point at which the TCR was derived, the less accurate the temperature estimate will be. So, to minimize this error, TCR's that are most commonly used for our purposes tend to be calculated/measured at temps that are close to those temps that we actually vape at. Interestingly, from what I can tell steam-engine.org measures TCR at 300 degrees Celsius (572 Fahrenheit), which is quite a bit hotter than I tend to vape at. But I think Daniel at djlsbvapes.com measures TCR at lower temps (around 210 Celsius or so), which is closer to my vaping range. But frankly, these differences are trivial for most of the commonly used materials.

If you're interested in the math to calculate TCR, it looks like this:

TCR = ((Rhot / Rcold) - 1 ) / (Thot - Tcold)

where:
Rhot = Resistance at operating temp
Rcold = Resistance at resting temp
Thot = Operating temperature (in Celsius)
Tcold = Resting Temperature (in Celsius)