Ipv4 ohm reading issues?

[I_am_Nothing]

Hey everyone,

I'm brand new to this forum. I've had my account for a while but haven't had the time to sit down and check out the site. Anyway, I've had a p4y ipv4 for I can't remember how long, I got it when they first hit the stores. Just recently tho I've noticed that the ohm readings have looked way off from what I'm used to seeing and they are fluctuating like crazy. Right now I have a2x24 AWG N80, 6 ply .4x .1mm n80 framed staple wrapped with 40awg n80. 5 wrap 2.5mm ID. And it's reading between .3ohm and .12ohm depending on I guess how it feels at the moment. Has anyone else had this issue with the ipv4? Any thoughts are helpful.

 

[daviedog]

Does that 'rig' have a self diagnostic mode?..

 

[I_am_Nothing]

Does that 'rig' have a self diagnostic mode?..

Not sure... I'll look into that. Thanks.

 

[dc99]

Have you tried locking the resistance? Hold down the up and down button for a few seconds. Mine does that on nickel sometimes

 

[_JB_]

I do not know the properties of nichrome wire if it is anything like n200 fluctuating resistance readings are to be expected. N200 wire will show a higher resistance when it is heated up and then it will lower as it cools.

I have an ipv4 that I had trouble with the charging balance board. A wire to the board and part of the board burned up from grounding to the body of the mod. It is recommended that balance board be removed before it causes you trouble. Search for a video on how to do that. Before I had trouble I noticed one battery would discharge faster than the other I am sure that was from voltage leaking to ground. I do not know if this issue could cause your varying resistance levels.

 

[daviedog]

Nichrome, i believe is a brand name for kanthal a1.
I used to buy it before there was TC mods..

 

[suprtrkr]

Nichrome, i believe is a brand name for kanthal a1.
I used to buy it before there was TC mods..

No offense, but not quite. NiChrome is a resistance heating wire composed of Nickel and Chromium. It's usually about 80% Nickel content, thus it's market price varies a lot with that of Nickel. It is useful-- doesn't burn out, I mean- because it forms a protective layer of Chromium Oxide at the surface and prevents further oxidation. Due to the high nickel content, it may cause fluxuating resistance readings just as Nickel TC (Ni200 or pure Nickel) wire does. I don't know that, but it seems entirely logical.

Kanthal, OTOH, is a trademarked alloy of Iron, Chromium and Aluminum. If functions similarly to NiChrome, but the anti-oxidation layer it forms is Aluminum Oxide (Alumina) rather than with Chromium.

 

[daviedog]

No offense, but not quite. NiChrome is a resistance heating wire composed of Nickel and Chromium. It's usually about 80% Nickel content, thus it's market price varies a lot with that of Nickel. It is useful-- doesn't burn out, I mean- because it forms a protective layer of Chromium Oxide at the surface and prevents further oxidation. Due to the high nickel content, it may cause fluxuating resistance readings just as Nickel TC (Ni200 or pure Nickel) wire does. I don't know that, but it seems entirely logical.

Kanthal, OTOH, is a trademarked alloy of Iron, Chromium and Aluminum. If functions similarly to NiChrome, but the anti-oxidation layer it forms is Aluminum Oxide (Alumina) rather than with Chromium.

Thank you. I stand corrected. Hopefully a bit wiser..

 

[suprtrkr]

Thank you. I stand corrected. Hopefully a bit wiser..

Just a tidbit. Some people like NiChrome wire for pure watt applications better than Kanthal. I have never tried it, myself.

 

[I_am_Nothing]

Hey guys,

First off thanks for all the activity on this thread. Also the ni-chrome info is spot on, I'm very impressed . Some people prefer ni-chrome to kanthal because the resistance is a bit lower so your bigger builds heat faster. I was thinking about the nickel content possibly causing it but I didn't think it would cause it to fluctuate that much. I'll check the temp coefficient of Nichrome as soon as I can to see if this is possible.

Dc99 the resistance will not lock in wattage mode with ip4v. The reason that feature is there on joule mode is because with the yihi chip you HAVE to lock your resistance for temp control to work properly. You lock the resistance when the coil and the mod are both at room temperature so the chip knows the resistance at rest of the coil so it can do its temperature calculations against that number. If this confuses anyone please let me know and I will further explain temp coefficients and temp control. This is something that everyone using temp control should know because of health and safety.

 

[I_am_Nothing]

Hi again,

So I just checked the temp coefficient of Nichrome and it looks like it's way to low to cause a change in resistance that dramatic. So damn, back to my mod being inaccurate.

 

[Hans Wermhat]

Did you check your screws? That's been the most common reason for resistance fluctuation in my experience. Sometimes a screw will back off slightly and the wire will wiggle causing your ohm readings to jump around.

 

[I_am_Nothing]

Yea that was one of the first things I checked. It happens on every different build / rda that I use so it's def not coil specific.

 

[dc99]

I didn't know it wouldn't lock in power mode, never tried it but it was worth a shot. I have two IPV4's. I had issues with the first one till I did the update on it and its been flawless since.
I wont swear to it but I have heard that if you do the update it kills the charging board.

 

[I_am_Nothing]

Haha that would be interesting, I've never used the on board charger. I did do the update tho a while ago, I wish they would release more updates like adding more wires for temp control. Anyway I stopped by my local vape shop, Vape Ink in Rockville, MD and we took it apart and cleaned the 510 connector and it started working again at least for now. The guy at the vape shop told me that he had this same problem with his ipv3 and ipv4 and that by cleaning it and resetting it you can get it to work for a while but it will continue to do it and eventually just stop working completely. Guess I should start saving for a new chip lol.