IPV D2 Box Mod 75w temperature control - $43.99
$39.95 with code: Efuntop10%
Sent with one hand, the other is busy vaping.
$39.95 with code: Efuntop10%
Sent with one hand, the other is busy vaping.
IPV D2 announced.
- Thread starter Completely Average
- Start date
- th_trl_thread_readers 0
- Status
Preorder, pay now and wait
But for that price.... And I believe it was free shipping? Worth the wait if you got the cash
The biggest risk with this device as I see it is that Titanium TC is in its infancy, so it might not be as good as improvements to come. The Nickel TC I'd expect to be fine (and some people use Titanium on Nickel settings and just lower the temperature limits, so that's always a kludge if Titanium TC doesn't work well).
Man that sucks. Did you e-mail them? Great price! Has anyone ordered products from them before?cant get the code to stick
i havent but i gave up anyway. I actually found somewher in uk where I can get it with a free 25R (prbably worth 4-5 quid) for £39. Ok its a bit more expensive but not much with the batt thrown in, free postage and I'll probably get it a lot sooner than from china. Also have someone to moan at if it is faulty etc...
Wot? Don't really understand what you're onto here. Titanium has a higher resistance than Ni so it's easier to get a good functioning TC mod out of it. It also has a stable TCR in the temperature range relevant to vaping when compared to Ni.
i think what he meant is that it works correctly. in the SXmini M thread some people are having issues with the Ti mode working correctly. I hope it works correctly too, because that's the whole reason I ordered this. So hopefully Yihi gets their algorithm figured out.
Correct, I was speaking to the algorithm itself, not with respect to Titanium wire.
its not even the algorith as such, its just the lookup table for R vs T. How can they screw that up??
So, stupid question but can you use temp control with kanthal wire? If not, why? I've read a little bit about it and understand that nickel wire changes resistance when heated, but kanthal doesn't really change much so I just don't get why if kanthal's resistance doesn't change that temp control wouldn't work with it. I also understand that nickel wire can give off harmful toxins if overheated, so I guess I just don't full understand how it doesn't read the temp of kanthal, especially if kanthal doesn't give off anything harmful if overheated. How does the mod measure the temperature? I feel dumb for asking since I consider myself a pretty avid vaper, but I've never used a TC mod and this will (hopefully) be my first one.
you got it in your first line. The whole TC thing works because the mod can read the resistance of the build and from a table of values, work out what the temperature is. It vcan cen regulate the applied voltage to keep the temp (actually the resistance) at the correct value. Kanthal resistance doesnt change with temp (at least not enough for the mod electronics to be able to accurately measure a difference) and so this method just doesnt work.
hope that helps. If not, pipe up and we can continue!!!
A variety of conductors increases resistance with temperature. The measurement of how much their resistance increases with temperature is called the Temperature Coefficient of Resistance ("TCR"). For some materials, the TCR is high, which means its resistance increases quickly with temperature. Nickel is one such material. For other materials, the TCR is quite low, which means its resistance increases slowly with temperature. Kanthal A1 and Kanthal D, which are what most vapors have used in non-TC atomizers, has a very low TCR.
How TC currently works is that it measures the resistance at room temperature, then based on the TCR of the material selected (Nickel, Titanium) it determines the resistance when it should stop applying power to the coil. Thus, if I have a ni200 coil at .07 resistance and a temperature setting of 400F, based on the TCR it may determine that the resistance cutoff is at .14 ohms. So once the coil is reading at .14 ohms, the device knows to limit power delivered to the coil.
Kanthal D doesn't really work well with this method, because if you had a 1 ohm resistance at room temperature, at 400F it only would have a resistance of 1.01 ohms. That isn't to say it isn't possible, just one needs very accurate resistance measurements that make the chip more expensive. Kanthal A1 is even harder to use with this method, because you need to get to 800 F to see even a few milliohms in increased resistance.
So it's only able to measure temperature via a change in resistance under load? So kanthal doesn't work because of the lack of resistance change it doesn't know how hot it actually is? Does it just go off some type of chart/calculation like a change of 0.2 ohms=X degrees f, and a change of 0.1 ohms = Y degrees f?
Each conductor has a TCR curve. For vaping temperature of interest, some curves are linear while others are non-linear (meaning that the TCR changes as the temperature increases). Nickel is non-linear, while others are quite linear. Based on temp, the chip calculates the target resistance based on the curve, than uses that to limit power applied to the coil. If the material is linear, obviously the calculation of target resistance doesn't even require a curve lookup, as one can use the TCR/degree and the temperature difference as a multipliers against the base resistance.
On a sidenote for those about to embark on TC, this approach assumes there is no measurable resistance from the atomizer (i.e., the only resistance is due to the nickel or titanium coil). If you find yourself in a situation where the TC needs to be set to a very low or high temp, that likely means that the atomizer has a measurable resistance in itself that is throwing off the TC resistance measurement.
Cool, thanks for the help guys! Temp Control still seems a bit weird to me, but so do quantum mechanics lol
- Status
Similar threads
