Temp control and battery life

[buggritt]

Switched one of my atomizers to an ss coil as I have a steel tank on it. Been using it at around 400F, but it seems to be using the battery a lot quicker for the same vape I get with kanthal. It's a 1 ohm coil.
Maybe VapingBad is the man for this question?

[SteveF]

DNA200/75?
wattage.. preheat?
Just taking extended puffs?

Dna75 max output is 16-17w @ 1ohm, don't know if vaping at max voltage would accelerate voltage drop in the same way that lower ohms/high amp would?

[domejunky]

Mar 10, 2017 8:45:12 GMT SteveF said:

DNA200/75?
wattage.. preheat?
Just taking extended puffs?

Dna75 max output is 16-17w @ 1ohm, don't know if vaping at max voltage would accelerate voltage drop in the same way that lower ohms/high amp would?

Don't where you got that from? It can do 6.2v - which is 38.44 Watts into a 1ohm coil...

[SteveF]

um ok perhaps I'm wrong, but the evolve graph for nickle power output shows about 17w @ 1ohm? but 36w in kanthal/power mode.

[domejunky]

Mar 10, 2017 11:44:26 GMT SteveF said:

um ok perhaps I'm wrong, but the evolve graph for nickle power output shows about 17w @ 1ohm? but 36w in kanthal/power mode.

I don't quite get those graphs. You'd struggle to get a 1ohm build from Nickel. Maybe it should be 0.1

[SteveF]

It would be a tricky one to wick thats for sure.

Exactly how it works out,  No voltage boost in TC direct battery voltage @ 4.2v max.
I dunno but I assume that the extended power profile applies to all TC materials? VapingBad ??

I stick to a resistance range of 0.15-0.5 with stainless, for me that covers most dual parallels and single coils with most of the power available. No isssues with DNA200s but so far my DNA75 seems to go directly to sag city when asked to TC above 35w.

[domejunky]

I decided to try and understand this. The mod doesn't know it's Nickel, just has a TFR curve for each material. In theory you could build a 1ohm coil and put 38.44 watts through it. Those graphs assume you are using TC (which you should be for Nickel) and the curve show the limit imposed by the max temperature.

I have a 0.7ohm 316L build that uses 50w preheat, works well at 35watt

[SteveF]

edited the previous post whilst you were posting.......... no voltage boost in TC mode because 99% of the time its stepping down?

1 ohm @4.2v is 17w

[buggritt]

Most of that is Japanese to me folks. It's an Eleaf Aster 100 watt, so no idea of the board. Peculiar, as I've been using it all day at 450f, 25 watts, and it seems to be lasting longer. My first stab at temp control, as I wantrd SS in case it went pear shaped. Then at least I could use it in wattage mode also.

[SteveF]

Mar 10, 2017 18:07:46 GMT buggritt said:

Most of that is Japanese to me folks. It's an Eleaf Aster 100 watt, so no idea of the board. Peculiar, as I've been using it all day at 450f, 25 watts, and it seems to be lasting longer. My first stab at temp control, as I wantrd SS in case it went pear shaped. Then at least I could use it in wattage mode also.

sorry buggritt , a lack of information let our imagination run wild. What atomizer are you using? Does it have a factory coil  or are you coiling it yourself?
to be honest, I think that a 1 ohm coil is too high a resistance, is it actually a TC coil or a 'stainless coil'.  0.2-0.5ohms is fairly typical of a coil meant for TC.

Anyway temperature control can be a swine, stainless steel doesn't help as it has very little resistance change for the board to monitor.
Main issues that can affect TC are poor connection due to dirty or loose contacts, clean the 510 pin and mod with isopropal alcohol or similar.
And setting/locking the base (cold) resistance with the coil or tank already warmed up or hot. It just gives a false reading that can mean its 40-50 degrees out for a 0.1ohm difference. Obviously using more power overfiring and getting tad warm ......or not.

[buggritt]

Ta. I've actually got no complaints about the vape. Everything works fine, and the resistance was set before any firing. Just the battery seemed to drain quicker with the same vape exoerience I got from wattage mode.

[SteveF]

strange, battery life tends to increase with TC use as the board throttles back when the coil reaches the required temperature.
Perhaps you're just taking longer puffs, I know I take longer draws and only really notice when I change from TC back to wattage.
at least its sorted itself out now

[VapingBad]

Mar 10, 2017 7:06:16 GMT buggritt said:

Switched one of my atomizers to an ss coil as I have a steel tank on it. Been using it at around 400F, but it seems to be using the battery a lot quicker for the same vape I get with kanthal. It's a 1 ohm coil.
Maybe VapingBad is the man for this question?

Sorry, long week I'll read the thread properly tomorrow, but you should temp protection to drain the battery a little less than VW, could be a fault in the tp board, an under performing VW mod or most likely the low battery cut off being a fair bit lower on the VW mod

[VapingBad]

The power graph is for Ni, I think it is just loosely based on Ni will be double or more it's resistance when vaping, you can get you own max figures for a temperature, TCR & resistance triplet. SS is going to be much closer to Kanthal and Ti much closer to Ni, as domejunky said it is the max output voltage of 6.2 that restricts max resistance, it was lower originally but they increased it in the beta to allow 0.5 ohm and 75 W.

buggritt you can put your last puff avg power, energy in mWh and time on the screen to compare how much energy the different modes are using, or vape hooked up to device monitor.

[buggritt]

Going to give it a run as I'm pleased with the vape. Just for fun, I've done a .5 ohm coil on the doggy and enjoying that at a much lower temp. Thanks v much