lolol. not quite! in any case you are in no position to talk about tc mod collections my friend!! haha!
Titanium wire, vaping and safety
- Thread starter TheotherSteveS
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My room temp is 85F/29.4C (It's Arizona and rainy/cloudy today) Hasn't rained in June in Arizona since 1321 AD (kidding)
the temps on the mods and the coil were the same.
There is something definitely strange for both apparently. I didn't check the results vs. your spreadsheet but I seem to remember folks saying to set the temp on a dna 40 around 100F low if one is running titanium. The 111F seemed to fit that...so I left it to The Bloke to do the heavy math lifting.
Duane
Tony et al report that the water test comes in at nearly 212 on a DNA 40 - that is why Tony thought it must be a curved coefficient, because the water test shows just below 212 but then for higher temps, say 400, a -90°F offset is needed.
A room temp of 85 is a bit higher than I ran the calcs for, let me check it again.
I guess NOT....You don't know Steve very well do you?
He has ALL the devices with temp limiting
FANTASTIC
I was assuming a linear coefficient and didn't think much other than the 100F delta would be more or less constant.
Duane
Yeah. I can't make heads or tails of these numbers at the moment. I really need to make some juice else I'll be vaping Dakeng juice before I know it, I'll come back to this in a couple of hours
Just so I'm clear:
You drip a Titanium coil of 0.205Ω in water?
You fire it on your mod?
You watch what temperature the screen displays?
On your DNA 40(s?) it shows around 195°F?
On three SX Mini Ms it shows around 111°F?
Is that all correct?
sure, what ever you have. It would be cool to see how various devices handle various liquids ...starting with water and going up to our vaping temps with other liquids. (I hope nothing flammable)
Exactly right.....all on the same coil but cooled by dipping the wick/coil in 85F water between tests....Yeah. I can't make heads or tails of these numbers at the moment. I really need to make some juice else I'll be vaping Dakeng juice before I know it, I'll come back to this in a couple of hours
Just so I'm clear:
You drip a Titanium coil of 0.205Ω in water?
You fire it on your mod?
You watch what temperature the screen displays?
On your DNA 40(s?) it shows around 195°F?
On three SX Mini Ms it shows around 111°F?
Is that all correct?
Jeez guys, I can't have a normal life for a few hours and when I return you wrote 3 pages of posts lol.
Just to clarify:
Dripper atty, coiled and wicked. Soaked the deck, wick and coil under running tap water (water his a little hard here with a pH of 7.8 in the summer and 7.5 in the winter).
Firing the coil with ni 200 gives, on my genuine dna 40 a 212F reading no matter what watts or how high I set the temperature. I live at sea level btw. George also did the test and it gave him slightly less. Around 210F I believe but he lives higher so we assumed that was it.
I do admit I was staggered by the dna 40 precision. I never really thought it would give 100C/212F for boiling water.
So when I took my titanium coil right afterwards and it the same test gave 96C jumping to 98C, I assumed that was indeed the seen temperature. That was also the reason I said that the TCR couldn't be linear because between the cotton test and the water test, there is a 25 times increase in offset which isn't linear at all.
Why it is so... Well, you guys explain it because I certainly have no idea
Regards
Tony
Sent from my keyboard through my phone or something like that.
Just to clarify:
Dripper atty, coiled and wicked. Soaked the deck, wick and coil under running tap water (water his a little hard here with a pH of 7.8 in the summer and 7.5 in the winter).
Firing the coil with ni 200 gives, on my genuine dna 40 a 212F reading no matter what watts or how high I set the temperature. I live at sea level btw. George also did the test and it gave him slightly less. Around 210F I believe but he lives higher so we assumed that was it.
I do admit I was staggered by the dna 40 precision. I never really thought it would give 100C/212F for boiling water.
So when I took my titanium coil right afterwards and it the same test gave 96C jumping to 98C, I assumed that was indeed the seen temperature. That was also the reason I said that the TCR couldn't be linear because between the cotton test and the water test, there is a 25 times increase in offset which isn't linear at all.
Why it is so... Well, you guys explain it because I certainly have no idea
Regards
Tony
Sent from my keyboard through my phone or something like that.
Tony
Sure you can have a normal life. Turn off the phone/computer and don't turn it on again!
As you no doubt saw there is a big difference in how my DNA 40 works in the water test vs. the SX mini M class guys.
With titanium I get 195F for the DNA water test and I get 110F with the SX Mini. I don't know why! There is definitely something strange going on between the two. It seems like the SX gives about a constant low 100F reading from 200F to 400F and the DNA has some sort of curvy stuff going on. The Bloke gets the assignment of straightening it all out because I don't have a clue and my head is about to burst trying to think of some explanation. My room temp is higher than most today and the elevation is about 1300 feet but neither one should explain the difference between the two devices so ?????????????????
My temps are now around 28C but when I did those tests it was colder. Probably around 20-22C
I have no clue about what's going on. I always assumed I would get something around 70C with the Ti water test but instead I got much more.
Regards
Tony
Sent from my keyboard through my phone or something like that.
What if... What if it is the preheat feature on the dna? It shoots 40w, Ti coil overheats (resistance raises more than it would normally) and the water, although boiling can't cool down the titanium as efficiently as nickel hence a higher reading? Heck I don't know... Even both my wires have the same thickness... 28g :/
Regards
Tony
Sent from my keyboard through my phone or something like that.
Regards
Tony
Sent from my keyboard through my phone or something like that.
I had the SX set on "powerful" which is a 10% or so boost in power for a couple seconds compared to standard/constant but I don't see how that should affect the stabilized temp with a longer button press. Enigma.
Duane
The more you know, more questions pop up.
Oh I miss my ego days.... Well, not really
Regards
Tony
Sent from my keyboard through my phone or something like that.
Oh I miss my ego days.... Well, not really
Regards
Tony
Sent from my keyboard through my phone or something like that.
I think this could be the best guess right now. Can you see on the screen what pre-heat actually means for te DNA 40? Does it just fire 40W regardless of temp setting? How long does it do that for?
There's plenty of unresolved questions but this is at least a known difference in the DNA 40, definitely vs all clones and also versus the SX Mini - although Powerful fires more, I don't think it fires as much as the DNA 40 pre-heat does? Well I don't know, but if eg you get 40W pre-heat when you're set to 20W, that's 100% greater. It might be 100% greater for a shorter period perhaps, but it's still a lot more of a boost.
Anyway that's definitely a possibility I'd think.
I still can't reconcile the opposite behaviour of the SX Mini though - coming in under the expected value by 25°C (45°C vs 70°C)
BTW what temp setting and wattage setting are you guys using for your various water tests?
I will try some tests tomorrow. Well, later today! My juice making ended up taking all night. I have 450ml more juice now of five different (new to me) recipes, and it better all taste good
Both the DNA 40 and the SX M's were set to 20 ...thats Watts for the DNA 40 and Joules for the SX M's.I think this could be the best guess right now. Can you see on the screen what pre-heat actually means for te DNA 40? Does it just fire 40W regardless of temp setting? How long does it do that for?
There's plenty of unresolved questions but this is at least a known difference in the DNA 40, definitely vs all clones and also versus the SX Mini - although Powerful fires more, I don't think it fires as much as the DNA 40 pre-heat does? Well I don't know, but if eg you get 40W pre-heat when you're set to 20W, that's 100% greater. It might be 100% greater for a shorter period perhaps, but it's still a lot more of a boost.
Anyway that's definitely a possibility I'd think.
I still can't reconcile the opposite behaviour of the SX Mini though - coming in under the expected value by 25°C (45°C vs 70°C)
BTW what temp setting and wattage setting are you guys using for your various water tests?
I will try some tests tomorrow. Well, later today! My juice making ended up taking all night. I have 450ml more juice now of five different (new to me) recipes, and it better all taste good
I don't understand why water cooling Ti vs NI would be different. Is there any reason heat transfer coefficients would be different between the two materials? I would think that's a matter of power delivered and the thickness of the vapor boundary layer/air velocity over the coil.
I know Pbusardo did some numbers on DNA40 preheat so we should be able to see how much preheat power that has. Unfortunately if I remember right he did the powerful and powerful+ numbers on the SX M at high power where the voltage max kicked in and he couldn't see the effect at all. I would guess if he had done it at lower temps he would have seen the kind of numbers that yihi shows in it's graphs.
Duane
oops...forgot to say temp setting was 400F for both DNA and SX MI think this could be the best guess right now. Can you see on the screen what pre-heat actually means for te DNA 40? Does it just fire 40W regardless of temp setting? How long does it do that for?
There's plenty of unresolved questions but this is at least a known difference in the DNA 40, definitely vs all clones and also versus the SX Mini - although Powerful fires more, I don't think it fires as much as the DNA 40 pre-heat does? Well I don't know, but if eg you get 40W pre-heat when you're set to 20W, that's 100% greater. It might be 100% greater for a shorter period perhaps, but it's still a lot more of a boost.
Anyway that's definitely a possibility I'd think.
I still can't reconcile the opposite behaviour of the SX Mini though - coming in under the expected value by 25°C (45°C vs 70°C)
BTW what temp setting and wattage setting are you guys using for your various water tests?
I will try some tests tomorrow. Well, later today! My juice making ended up taking all night. I have 450ml more juice now of five different (new to me) recipes, and it better all taste good
Duane
When having an RTA like a Billows or the Goblin which accommodates dual coils, do I build one coil when using Nickel wire on a rDNA 40 device? Sorry throwing this question up right now. Been bouncing back and forth with all these Nickel posts.
Duane,
PB did the YiHi boost but he was having trouble analyzing the PFM signal correctly. The DNA40 boost is 40 watts for one second or until the temperature is within 100 degrees of TP whichever comes first.
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