Evolv DNA Forum
Sign up Calendar Latest Topics
 
 
 


Reply
  Author   Comment   Page 5 of 7     «   Prev   2   3   4   5   6   7   Next
Willy

Avatar / Picture

Member
Registered:
Posts: 63
Reply with quote  #61 
Quote:
Originally Posted by lewisss
I have built loads of dna devices and i measure the mod resistance with a solid copper threaded knob from signature mods. 
i always get mod resistance between 0.005-0.002 ohms

I have just done my first dna250 (massive with a turnigy 4000mah 3s2p graphene lipo) 
and it reads the resistance as i screw it on like normal but when it makes good contact it shows?

does this mean there is 0 resistance in the mod?

is this even possible?



Yes, ? means o ohms, you'll get the same ? when no atty is attached, the board sees zero/no ohms therefore shows the ? symbol. I have a couple of my custom made Hammond box mods that read zero once I've tighten and bottomed out the 510 tool showed in my post above. Most of my other mods read between .003-.005

I always make sure the threads on the tool and the 510 is good and clean of any juice, dirt or oil before testing. I confess, I'm obsessive with keeping the 510's and thread on the atty's clean, I use q-tips on the 510 every time I change an atty, cram them hard as I can in the 510 and rotate it all around and repeat. On the atty threads, fold a piece of paper towel doubled, with my thumbnail I press the towel hard into the threads and spin. Over time juice and crud will get in there and I'll get black steaks in the cotton from the 510 threads where the crud came out of the bottom of the treads. Usually I use dry q-tips, if a tip looks really dirty I'll dampen with alcohol then repeat with a dry tip.
VapingBad

Avatar / Picture

Administrator
Registered:
Posts: 2,449
Reply with quote  #62 
? usually means it has hit the current limit for the test, so the res it at the low end of the range, I use 0.002 when I get this.
__________________
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •

Latest versions of EScribe: DNA 200/250DNA 75
Common problems
Willy

Avatar / Picture

Member
Registered:
Posts: 63
Reply with quote  #63 
Quote:
Originally Posted by VapingBad
? usually means it has hit the current limit for the test, so the res it at the low end of the range, I use 0.002 when I get this.


Hey VB, Did I get that wrong? I thought it meant zero?
lewisss

Senior Member
Registered:
Posts: 139
Reply with quote  #64 
Quote:
Originally Posted by Willy


Yes, ? means o ohms, you'll get the same ? when no atty is attached, the board sees zero/no ohms therefore shows the ?


that's my issue really, does the '?' indicate 0 ohms (perfect short) or infinite ohms (when no atty is attached)
there should be no circuit when no atty attached.
if the' ?' is infinite ohms that means i am getting a break in the 510 circuit when i screw it in too far
VapingBad

Avatar / Picture

Administrator
Registered:
Posts: 2,449
Reply with quote  #65 
Quote:
Originally Posted by Willy


Hey VB, Did I get that wrong? I thought it meant zero?

Yeah, it indicates that a reading was not be taken, IIRC it is probably a safety limit on current for the test being triggered when the resistance is extremely low. You can also see ? sometimes when there is nothing in the 510.

__________________
• I am not employed by nor do I represent Evolv Inc.  All opinions are my own, they are just opinion not fact and can be wrong •

Latest versions of EScribe: DNA 200/250DNA 75
Common problems
bmclaurin

Senior Member
Registered:
Posts: 108
Reply with quote  #66 
EDIT: Deleted post as others had already responded so my response was duplicative.
Catharsis70

Junior Member
Registered:
Posts: 10
Reply with quote  #67 
Bringing this back up hope nobody minds. Ive made a "dead short rda deck to test mod resistance. I used a Jaybo inde duo. I removed the topside positive post to 510 screw insulator so the positive "T" post is screwed directly against the rda body. I also bent the both sides of the "T" downward so they are in direct contact with the negatives that of course are part of the deck body. Should be direct short for sure. Thing is on my ohm checker it reads 0.04ohm. should a dead short show any resistance to the meter? If that is normal is there anything I need to subtract from what atty analyzer reads? Im doing this to test on a vt250 (dna250) device it that makes any difference.
Thanks in advance for any insight. Im a new join and just poking around the vast majority here knows way more than I do lol.
dwcraig1

Avatar / Picture

Administrator
Registered:
Posts: 1,248
Reply with quote  #68 
Early on I put heavy strand of copper through the posts of my Velocity, reading was 0.02 ohms.
Using and old cartomizer or 510 adapter with it's end soldered together works well.
carto.jpg 


__________________
I am not connected with and do not represent Evolv Inc. All opinions are my own. They are just opinions and may not be correct.
Catharsis70

Junior Member
Registered:
Posts: 10
Reply with quote  #69 
Would shorting a premade tank coil (super tank mini) by gutting it and replacing the wire insulator with a metal tube that fits tightly an accepts the coils 510 post work? I mean taking that assembly and using the tanks base to connect to the mod 510. Would that get me a lower resistance short? Or does the impedance of the shorted "tool" not matter that much? With the inde duo deck deal i get very unstable reading while tightening it into the 510. Bottomed out I get ? (0) backed off just a hair I get a stable 0.008 in atomizer analyzer. But we want a bottomed out full connection right? With that I get zero but zero cant be right the mod has to have SOME resistance doesnt it? And if the zero reading is correct do I set the mod at 0 or is there a default figure to try? At zero from the factory TC is all over the place. Set to 0.008 coils read low and the vape is very weak. Thanks for the reply. Im learning here, kinda read it and try it. Basic understanding of impedance and its affect in power from working with speakers and amplifiers. It would be nice to have stable consistent performance from my mod and a little less fiddling to get a nice Vape.
Thanks again!
dwcraig1

Avatar / Picture

Administrator
Registered:
Posts: 1,248
Reply with quote  #70 
Well here is what's going on, with all the 250 boards and all the 200 boards with 1.2 SP? software Atomizer Analyzer will not read below 0.007 ohms. So if it displays down to .007 then throws up a "?" it's .007 ohms or less.
On the earlier firmware it wouldn't read below 0.002 ohms.

__________________
I am not connected with and do not represent Evolv Inc. All opinions are my own. They are just opinions and may not be correct.
Wayneo

Senior Member
Registered:
Posts: 296
Reply with quote  #71 
Quote:
Originally Posted by Catharsis70
.... the inde duo deck deal i get very unstable reading while tightening it into the 510. Bottomed out I get ? (0) backed off just a hair I get a stable 0.008 in atomizer analyzer. But we want a bottomed out full connection right? With that I get zero but zero cant be right the mod has to have SOME resistance doesnt it?
Yes, there has to be some resistance, and what you've decribed is perfectly normal. As dwcraig mentioned, AA has beeen busted for quite some time. 


Quote:
Originally Posted by Catharsis70
....And if the zero reading is correct do I set the mod at 0 or is there a default figure to try? At zero from the factory TC is all over the place. Set to 0.008 coils read low and the vape is very weak.
A lower value, or zero, is better than a higher value for TC.

Can you describe in more detail your TC issues, either in a new thread or an already existing thread so we can look at that independantly. For quickest easiest troubleshooting, a screen capture of the profile, a description of the coil, and a screen capture of device monitor with Temperature settings at a minimum. 

Proper Print screen, not a skewed moire filled fuzzy picture appreciated.

__________________
My old tired eyes don't look at skewed, moire filled cell phone photos. Printscreen - Sniping tool or [ALT]+[PRT SCN], open MSPaint and paste [CTRL]+[V]
giz_60

Avatar / Picture

Senior Member
Registered:
Posts: 796
Reply with quote  #72 
You can try this..on the last 250 I bought, I too was having the ? when trying to obtain the mod resistance due to the wonky Atomizer Analyzer..took a build that I knew the ohms...ran the analyzer & subtracted..in this instance, the build was .07Ω...this may help you get a closer idea as to your mod resistance...of the 7 DNA devices I have, they range from .003 to .005

Atomizer Analyzer.png   
Just make sure that the coil is cold..

Wayneo

Senior Member
Registered:
Posts: 296
Reply with quote  #73 

Hot damn @giz_60, you da man. I'm gonna do this myself on my new 250.

So, just to be clear .... we have 3 values to work with .... Raw Ohms, Nominal ohms (kanthal and Temp). And you're way was to set mod resistance to zero, then subtract 'raw ohms' from 'nominal ohms (kanthal).' So we really only have the atty resistance not accounted for.

I wonder ... how does Evolv expect anyone to do this accurately now?


__________________
My old tired eyes don't look at skewed, moire filled cell phone photos. Printscreen - Sniping tool or [ALT]+[PRT SCN], open MSPaint and paste [CTRL]+[V]
giz_60

Avatar / Picture

Senior Member
Registered:
Posts: 796
Reply with quote  #74 
Quote:
Originally Posted by Wayneo

Hot damn @giz_60, you da man. I'm gonna do this myself on my new 250.

So, just to be clear .... we have 3 values to work with .... Raw Ohms, Nominal ohms (kanthal and Temp). And you're way was to set mod resistance to zero, then subtract 'raw ohms' from 'nominal ohms (kanthal).' So we really only have the atty resistance not accounted for.

I wonder ... how does Evolv expect anyone to do this accurately now?



Ok..took me a minute to remember...old timers disease...[confused]...Set mod resistance to 0...attach cold coil..turn watts or temp to lowest...quick fire to get mod to check cold ohms...run AA & subtract the cold ohms
giz_60

Avatar / Picture

Senior Member
Registered:
Posts: 796
Reply with quote  #75 
Capture1.PNG 
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.