New studies find carcinogens in vg and pg at high temps, even in tootle puffers

[cigatron]

The resistance is set at 70f. So if it's not 70f how accurate is it? That's the question and if you take a mod that is set to work in a room temp environment how does it accurately work in extream weather conditions? But most importantly the coil temp is not 70 at the start of the calibration.

Do other people notice a "pre-set" room temp on there mods?[/QUOTE
Some mods it's important to lock your res to ensure ambient temps don't effect your base res.

 

[zoiDman]

The resistance is set at 70f. So if it's not 70f how accurate is it? That's the question and if you take a mod that is set to work in a room temp environment how does it accurately work in extream weather conditions? But most importantly the coil temp is not 70 at the start of the calibration.

Do other people notice a "pre-set" room temp on there mods?

All Understood.

But saying something is Not Accurate doesn't give someone any Frame of Reference as to what Accuracy we are Talking About.

It's been a Long time since I looked at any Temp/Resistance Graphs. But I seem to recall that there Isn't much Resistance Change at or around Room Temperature. But I could be Mistaken.

So how far Off would be the Calculated Temperature be at Vaping Temps if the Mod's baseline starting Temperature at 70F and the Actual Starting Temperature was +/- 20F ?

 

[cigatron]

All Understood.

But saying something is Not Accurate doesn't give someone any Frame of Reference as to what Accuracy we are Talking About.

It's been a Long time since I looked at any Temp/Resistance Graphs. But I seem to recall that there Isn't much Resistance Change at or around Room Temperature. But I could be Mistaken.

So how far Off would be the Calculated Temperature be at Vaping Temps if the Mod's baseline starting Temperature at 70F and the Actual Starting Temperature was +/- 20F ?

+ or - 50°

Sorry, my internet keeps crashing. Approx 50°. The tcr of the wire plays a role in that calculation too. Formula cam be found on the "ni200 and beyond" thread.

 

[cigatron]

All tc mods are set up to measure base/cold res at 68-70°f ambient. To ensure you're at ambient let your mod with atty installed set at ambient for 30min. Then read and lock the res.
Once res is locked it won't matter what other ambient temps the coil experiences.

 

[zoiDman]

See post immediately above.

Thanks Rossum.

 

[Cosmic_Glaze]

All Understood.

But saying something is Not Accurate doesn't give someone any Frame of Reference as to what Accuracy we are Talking About.

It's been a Long time since I looked at any Temp/Resistance Graphs. But I seem to recall that there Isn't much Resistance Change at or around Room Temperature. But I could be Mistaken.

So how far Off would be the Calculated Temperature be at Vaping Temps if the Mod's baseline starting Temperature at 70F and the Actual Starting Temperature was +/- 20F ?

Is room temperature actually "room" temp or just the temp of the environment you are currently in? I would assume that when setting the resistance it would be the "environment " that you are going to be Vaping in. It would be reading the resistance of the coil at that temp to make adjustments.
Ok here is a situation.
You are outside say camping for the weekend. It's 50f (not fun temp for camping, but whatever), you build a coil ect,ect.. set your resistance and your mod still thinks it's 70f. It's off by 20 deg. Does that make a diff? That's my question?

 

[Eskie]

If you just look at the resistance reading of the coil at room temperature, and again after 30 minutes in the freezer, what is the difference between them?

And DNA mods do continually refine the "cold" resistance, which is why you don't lock it in like other TC mods unless you're desperate (in which case you should be looking at your atty and 510 to see why it's not holding a proper resistance anyway).​

 

[cigatron]

Is room temperature actually "room" temp or just the temp of the environment you are currently in? I would assume that when setting the resistance it would be the "environment " that you are going to be Vaping in. It would be reading the resistance of the coil at that temp to make adjustments.
Ok here is a situation.
You are outside say camping for the weekend. It's 50f (not fun temp for camping, but whatever), you build a coil ect,ect.. set your resistance and your mod still thinks it's 70f. It's off by 20 deg. Does that make a diff? That's my question?

Read my previous post.

 

[Rossum]

You are outside say camping for the weekend. It's 50f (not fun temp for camping, but whatever), you build a coil ect,ect.. set your resistance and your mod still thinks it's 70f. It's off by 20 deg. Does that make a diff? That's my question?

Assuming the mod uses a linear TCR value rather than a curve that you can input, and it doesn't know that it was actually 50F instead of 70F when you installed the coil, then it would be off by 20F across the board.

If the mod uses a TCR curve, then things get a bit more complicated due to the shape of that curve.

 

[Eskie]

You are outside say camping for the weekend. It's 50f (not fun temp for camping, but whatever), you build a coil ect,ect.. set your resistance and your mod still thinks it's 70f. It's off by 20 deg. Does that make a diff? That's my question?

20F on 316L? Not much at all.

 

[Cosmic_Glaze]

Assuming the mod uses a linear TCR value rather than a curve that you can input, and it doesn't know that it was actually 50F instead of 70F when you installed the coil, then it would be off by 20F across the board.

If the mod uses a TCR curve, then things get a bit more complicated due to the shape of that curve.

After taking it out of the fridge it still read 70 which makes me think that is the lowest reading it will go.

 

[Rossum]

All tc mods are set up to measure base/cold res at 68-70°f ambient.

I don't think so. Again, why do you think the DNA40 (and I assume subsequent TC boards from Evolv) have an on-board ambient temperature sensor?

 

[cigatron]

If you just look at the resistance reading of the coil at room temperature, and again after 30 minutes in the freezer, what is the difference between them?

And DNA mods do continually refine the "cold" resistance, which is why you don't lock it in like other TC mods unless you're desperate (in which case you should be looking at your atty and 510 to see why it's not holding a proper resistance anyway).​

I lock the res on all my dna mods. Never had a problem doing that. I don't want it to refine anything.

 

[cigatron]

I don't think so. Again, why do you think the DNA40 (and I assume subsequent TC boards from Evolv) have an on-board ambient temperature sensor?

To refine the base res when the mod reaches 68°f when the res is not locked.

 

[Eskie]

After taking it out of the fridge it still read 70 which makes me think that is the lowest reading it will go.

The temp said 70F, but what resistance reading was the coil at room temp compared to your freezer?

 

[zoiDman]

+ or - 50°

Sorry, my internet keeps crashing. Approx 50°. The tcr of the wire plays a role in that calculation too. Formula cam be found on the "ni200 and beyond" thread.

+/- 50F sure seems like a Lot.

 

[Rossum]

To refine the base res when the mod reaches 68°f when the res is not locked.

Good luck with that when my AC is set to 75 in Florida in the summer.

 

[mikepetro]

All DNA boards have an onboard temp sensor used for Room Temp. The challenge comes in when the enclosure is warm from use prior to sticking a coil on there. The DNA can think the room is hotter than it really is. To compensate for this, DNAs do a "refinement" during idle periods, and that corrects any miscalculations in the "cold ohms" calculation that might have been made initially. However, if your atty doesnt have a stable resistance, this refinement can cause problems.

 

[sofarsogood]

Yeah... Do any TC Mods have a Ambient Temperature sensor?

I believe the Arctic Fox firmware can display a temp for the board or a temp external to the board but I don't know who to select them. That may be something that requires a PC which isn't handy at the moment. Here's what I see on the screen.

 

[Rossum]

All DNA boards have an onboard temp sensor used for Room Temp. The challenge comes in when the enclosure is warm from use prior to sticking a coil on there. The DNA can think the room is hotter than it really is. To compensate for this, DNAs do a "refinement" during idle periods, and that corrects any miscalculations in the "cold ohms" calculation that might have been made initially. However, if your atty doesnt have a stable resistance, this refinement can cause problems.

Right, and there is absolutely no need for them to reach some arbitrary temperature such as 68F in order to do that.