measuring ohms Measuring ohms more than once?

[Rubberducky784]

Hi 

As we all know, when you start vaping on a coil, the ohms will normally drop after using it for a while (for example, new coil installed reading at 0.2, could drop to 0.15-0.18 over time). 

Is it advisable to go into the atomizer selection on the mod and measure the coil again occasionally as the coil is used so the mod is reading accurately or just to leave it at what it read originally? 

 

Thank You! 

[dl12345]

If you don't lock the ohms the board will auto-adjust

[Rubberducky784]

Hi DL 

 

Thanks for your reply, sorry but I forgot to mention, this is in power/watts mode. Any advice please? 

[Wayneo]

6 hours ago, Rubberducky784 said:

... but I forgot to mention, this is in power/watts mode. Any advice please?

Then no.

If your mod is always reading the live ohms/resistance of your coil, why would you think you would need to re-measure? But there's no harm whatsoever if you do, as it won't matter

[Rubberducky784]

On ‎8‎/‎12‎/‎2018 at 3:30 PM, Wayneo said:

Then no.

If your mod is always reading the live ohms/resistance of your coil, why would you think you would need to re-measure? But there's no harm whatsoever if you do, as it won't matter

Hi Wayneo

 

Sorry but I'm not following about this "reading live ohms". Let me try to explain what I'm trying to ask.

 

I have a Paranormal DNA250C with a Horizon falcon tank, 0.15ohm mesh coils.

 

If I put a fresh coil in and attach it to my mod, it will do the usual "is this a new coil?" and it will normally read it somewhere in the region of 0.25 ohms, but if I tighten the tank to the mod a bit more, I can get it to around 0.19 ohms. At this point, I will select yes.

 

After using the tank for a few hours, if I go into 'atomizer' and measure it again, it will be lower, like 0.15-0.16 ohms like it should be, the same can happen if I take the tank off for whatever reason and put it back on, should I "use old settings" or accept the new ohm reading each time?

 

Thanks in advance!

[Wayneo]

IF

On 8/12/2018 at 3:56 AM, Rubberducky784 said:

this is in power/watts mode

You do not need to 

2 hours ago, Rubberducky784 said:

go into 'atomizer' and measure it again

But if you do then

2 hours ago, Rubberducky784 said:

accept the new ohm reading

because

On 8/12/2018 at 10:30 AM, Wayneo said:

there's no harm whatsoever if you do, as it won't matter

 

[Rubberducky784]

25 minutes ago, Wayneo said:

IF

You do not need to 

But if you do then

because

 

Thank you.

 

One other question, what about if I take the tank off for whatever reason like a bit of juice gets under the tank and I want to clean the mod (happens occasionally).

 

I put a new coil earlier in earlier today and accepted the reading of 0.19 ohms, I've just taken the tank off and re-attached it, it now asks if I connected a 0.269 ohm coil. What would you choose here Wayneo, yes or no, use old settings?

 

Thanks

[awsum140]

Personally, I'd try a new tank, coil and/or device.  You say if you "tighten" the tank the resistance changes, rather substantially.  That would seem to indicate a bad connection either in the tank or mod.  I've been using the same tank on the same mod for about two weeks now, with multiple removals for refills and cleanings, and it still reads .30 ohms like the day I first started using it.

[Rubberducky784]

Hi Awsum 

That's right, if I screw the tank onto the mod until it stops turning with a new coil installed (which I've always done with previous tanks/devices), it'll ask me if I've connected a 0.257 or 0.269 *somewhere in that region* but if I screw in on with a bit more force, it'll read around 0.16 to 0.19 which is closer to the 0.15 ohms that the coil should be. 

 

I'm no expert (obviously lol) but coils are normally pretty close to the ohms they should be and this is quite a big difference/gap. 

 

So when you remove your tank and pop it back on, does it even ask you if you've installed a new coil or do you just select "no, use old old settings"? 

 

Thank You 

[awsum140]

Unless I put a new, and different, build in the tank I never see the "New Coil" question.  I'm fairly good at building coils and it rarely happens unless I switch materials.  I would never answer "Yes" to a new coil question while using the tank/build, since it's not a new coil.  Like i said, if you're getting significant resistance changes from tightening up the tank, something is probably wrong in the 510 connection, either tank center pin or mod itself.  I'd look very carefully at the tank and definitely clean everything with some IPA.

[Rubberducky784]

Interesting, which device/chip are you using?

I'm thinking perhaps it's the mod as the same thing happens with a different sub ohm tank I use, there's a third one which I'm going to run some tests with as well  🤔

Do you think if the same thing happens with the third tank, I should consider asking Evolv to take a look maybe? 

My concern is that with the ohms reading weird like this, it's going to mess up coils.

[dwcraig1]

This is where Atomizer Analyzer is really useful.  I have one 510 that starts to read before I screw in the atomizer  a complete turn, but most require being screwed in much farther.

The mod that I'm using right now, an Opus 200 with a Taifun GT4, the connection starts a good 3.5 turns before the atomizer is screwed in all the way.

I have seen others where contact is made right as the atty bottoms out, this may be what is happening on yours.

Give Atomizer Analyzer  try as to what I described  above. 

[dwcraig1]

The Falcon tank appears to have a sliding 510 pin, an adjustable pin on the atty with other press fit connections with a spring loaded 510 differently can cause jumping ohm's issues. Try pressing the atty's 510 pin in prior to screwing on mod, see if that makes any improvement. 

[awsum140]

I'd get a different tank, one without a press fit 510 connection.  The resistance values needed for accurate TCR are far too low to have them jump around at the whim of some friction fit part.  They also need to be consistent or your results are going to wander all over the place.  A screw connection is OK, but press fit is asking for problems.  I ditched the Bachelor tanks a  long time ago just because the center pin was a press fit.  From what I can see from photos, that tank has a friction fit that relies on the mod's 510 connector to produce a "good" connection by applying pressure to the center pin to push it against the deck connection.  The Bachelor has the same crappy system.  Far too unstable a connection for TC IMHO.