Beyond Frustrated... Single Micro Coil in Theorem Causes Resistance to Keep Increasing by .01

[Whitechapel]

Atty: Theorem
mod: ipv4

No other atty does this for me. Last night I sat down and built and built and built. What is happening is the initial reading on the mod will be, say, .59. Dry fire it once, .59. Dry fire it again, .59. Dry fire it again, .60. Dry fire it again, .61. Dry fire it again, .63. It will max out at .63 and not go any higher. If I let the coil cool down, it'll reset and go through the same process. I thought it was my build, which is just a 7/6 wrap 24g micro coil in a Theorem. I had a notch coil in it before and it was fine. I checked the screws, for shorts, played with the 510 including unscrewing slightly and screwing back in. The coil is glowing evenly from in to out too, no hot legs or anything. I am stuck and confused, I don't want to wick it until I get it to stay the same resistance.

 

[Train2]

I dunno - a build often does "settle in" to a resistance - and you're only talking about a discrepency of FOUR ONE HUNDREDTHS of an ohm. That, in practice, is probably negligible...
If it jumped up and down, or the gap was larger, I'd be bummed, too - but that could be device inaccuracy.
I'd go ahead and vape it.

 

[SLIPPY_EEL]

When i've had coil's lose resistance it's been through post screws going a little loose from the heat while dry firing or going loose from pulling the coil about.
As Train2 said, i'd just vape it.

 

[zoiDman]

Atty: Theorem
Mod: IPV4

No other atty does this for me. Last night I sat down and built and built and built. What is happening is the initial reading on the mod will be, say, .59. Dry fire it once, .59. Dry fire it again, .59. Dry fire it again, .60. Dry fire it again, .61. Dry fire it again, .63. It will max out at .63 and not go any higher. If I let the coil cool down, it'll reset and go through the same process. I thought it was my build, which is just a 7/6 wrap 24g micro coil in a Theorem. I had a notch coil in it before and it was fine. I checked the screws, for shorts, played with the 510 including unscrewing slightly and screwing back in. The coil is glowing evenly from in to out too, no hot legs or anything. I am stuck and confused, I don't want to wick it until I get it to stay the same resistance.

What you are seeing are Very Small Variation in Ohms. I wouldn't be concerned with it at all.

BTW - You do know that when a Coil heats up, that the Resistance of the Coil Increases. Right?

 

[Eskie]

What kind of wire are you using?

 

[whiteowl84]

What kind of wire are you using?

This

 

[Eskie]

This

What's This?

 

[TheTinMan]

What's This?

I think he meant this as in,"this question is pertinent to answering the OP's question".

 

[Eskie]

Edit: total misread. Yes, it is relevant to answering the OPs question.

 

[sawlight]

Seriously, my $400 Fluke DVM can't measure that resistance. Vape it! I'd be pretty happy if that's all the jump I saw in my builds!
Using 28g Ti on my 521 tab I can watch the res go up just from the heat flux caused by the little voltage run through it to measure the res!

 

[whiteowl84]

I think he meant this as in,"this question is pertinent to answering the OP's question".

Exactly.
If it's SS, that will happen. Kanthal and n80 don't change much when you heat it.

 

[McAnythingReally]

Exactly.
If it's SS, that will happen. Kanthal and n80 don't change much when you heat it.

Thats what I was thinking. That resistance rise is generally in the range that SS runs, I typically get a .04-.07 resistance change when running any SS coil in power mode on my DNA.