Safety Question

[lost.n.disturbed88]

So... I quite like the idea of rebuilding my vivi nova heads with cotton, but at the same time... Terrified I will blow my face off, or something...

So what can I do to make sure I don't cause any shorts that could cause explosions or something? I hear multimeter and ohm meter, but couldn't they go boom also? The pv options are a 650mah inferno, a 1300mah spinner, a 2200mah vv gripper, and if I'm lucky, a 2200mah Zmax... If that matters?

 

[lost.n.disturbed88]

Bump please... Looking for certain answers before I make an ego rpg xD

 

[myyrkezaan]

Check out the videos on youtube for rebuilding a VVN.

 

[Sad Society]

So... I quite like the idea of rebuilding my vivi nova heads with cotton, but at the same time... Terrified I will blow my face off, or something...

So what can I do to make sure I don't cause any shorts that could cause explosions or something? I hear multimeter and ohm meter, but couldn't they go boom also? The pv options are a 650mah inferno, a 1300mah spinner, a 2200mah vv gripper, and if I'm lucky, a 2200mah Zmax... If that matters?

I use cotton on a bottom feed rba and it works fine. I suggest trying to use a regular multimeter. Not a meter that you hook up between an atty and a pv and get a reading while pressing the fire button. But a multimeter with positive/negative pins. That is the safest way to test. There are different sizes of resistance wires to use to make coils that will give you different ohm readings.

28g wire for lower ohms and 32-34g for higher ohms. <---and other sizes in between. But it also depends on how many wraps of wire you are using to make your coil. I like low ohms myself. Aim between 1.5 and 3.0 ohms, and you should be OK. After a few builds then you could try try to narrow down what ohm level you like. 1.5 ohm for a harsher vape. And 3.0 for smoother vape.... That is if you are using the same battery voltage for both. Having a VV mod really helps to dial in the sweet spot of the vape regardless of ohm level...for the most part.

Don't be concerned about getting exact ohm levels. Your first build could be 2.6 ohms or it could be 3.5 ohms. And it would still work. The fewer wraps of the coil will result in lower ohms, and more wraps will give higher ohms.

Having a short doesn't mean it will cause an explosion. If you are using any of the size wire I suggested above and there is a short then it means that the atty will not work properly. If the multimeter test is not giving solid readings then that generally means there is a short.

There are safety features put in place on ecigs. But take that last sentence with a grain of salt. Because not all ecigs could be safe.

Don't use unprotected batteries, and find out what the safety features/protection your ecig has.

I know that I can put a 1.0 Ohm atty on my VV mod and then set it to it's highest Voltage (6.0 volts) and the safety features will not let it past 4.2 volts.

Hope this helps.

 

[JazzyTech]

Here's P.Busardo's video on rebuilding vivis.
A PBusardo Tutorial - Vivi Nova Cleaning & Rebuilding - YouTube
The heads are interchangable and the rebuild pretty easy. I've been rebuilding vivis and vaping on cotton for about a month now. Works great. This is how I do it:
I use A-1 32 awg Kanthal wire and square-braid 100% cotton candle wick size #1/0. A few notes; the square-braid fits perfectly in the slot in the vivi and doesn't leak. It also resists sliding around like smaller wicks do. The 32 awg kanthal is thick enough to work with without crushing when/if you replace the cotton. I use many cotton wicks with one coil.

Once I have wick and coil in place, I hold the coil to the side that is grounding to the metal tube (this will be the wire that you have to hold in place first with the rubber grommet. Then I push it back to the center before bending and inserting the metal pin that holds the second wire. This second wire is the one that you don't want to touch anything but it's metal contact pin that holds it in place. This is easier to understand when you're actually reassembling the head.

As for measuring the resistance: once you have the head assembled, you can safely measure it before you screw it back into the unit. No ohm meter will explode if you short it. It's common practice to hold the two leads of an ohm meter together to see what the lead's ohms are. In my case they are 0.2 so I have to subtract that from my overall resistance. If my coil measures 2.4 ohm, it's actually 2.2 since my ohm meters leads are .2 ohms already. Don't let this confuse you. If you have 1.8 or higher, you're good. If you wrap and you find that your resistance is too low (1.4 ohms) then add another turn. I typically wrap 4-5 turns which give me approx. 1.8 to 2.4 ohms.
Hope this helps.

Oh, and don't wrap the coil tightly. Just light contact. Cotton swells some when wet and you don't want to choke it.