Vivi Nova Rebuild - Short Circuit Question?

[gpang788]

Just bought a nova, liking it so far and am attempting my 1st rebuild.

Just read about how some fellows rebuilt their novas and shorted out their batteries.

1) Question is what will happen to my battery if it shorts out?

2) As my battery does not come with short protection, will it blow up in my face?
Link to batt: Electronic cigarettes|Electronic cigarette manufacturer|SLB E-cigarette|Sailebao Technology

3) How do I test the rebuild with a multimeter for a short? ( Am not electronics savy here )

4) Is checking for ohms important? If I over or under ohm, will it have an impact on the battery and lead to a failure?

 

[bosun]

Since you've rebuilt a coil, you know where the wires are (G). Using a multimeter on the ohms setting, touch your leads to the center post and the outside metal of the new coil..it should show you the ohms of the coil. It should show you a number between 1 ohm and 4 ohms if you've done things right. Zero or infinity says that you have a problem.
If the coil shorts out, it is possible that the excessive current draw will cause the battery to go into "thermal overload". The battery may not work at all after that, or melt down or expand explosively. Caution is advised, which is why there are so many posts about using a multi meter of some sort. I use an analog multi meter, plus one of those little black boxes with 510/808 connectors (around 20 bucks, foolproof, and gives a stable platform for coil building), and a PV that checks the ohms and will not fire if there is a problem. Always better to err on the safe side!

 

[gpang788]

What if it shows you a number less then 1 or more then 4 ohms? Should I discard the coil and start again?

Zero or infinity on the multi-meter can also mean a short right?

 

[Crunktanium]

Don't risk it test on a coil tester, meter or a protected device that wont fire sub ohm. I fried a cheap ego testing a dripper setup at .6 ohm just to see if it would fire. One touch the button and the board was toast in fact it created an open circuit. I had to short the thing to get it to shut off so I could discharge it safely.

If the number is 1 or below it's sub ohm anything below 1.2 can short ego batteries and some devices simply wont fire. Anything below .8 and your getting into the danger zone with unprotected batteries. Infinity would be a dead short or bad connection if you see a really high number in the upper teens. Sometimes with a meter it's hard to get a good reading which is why for rebuilding it's worth spending $20 for a coil tester considering how much you will save long term.

 

[Plumes.91]

It sounds like you know little to nothing about ohms law? You basically need to know everything you can know about ohms law to rebuild, otherwise your not going to wrap a coil in the perimeters you need it at. If your wrapping a coil to vape atop a Variable Voltage or Wattage mod, then you have to wrap it above 1.2 ohms. VV/VW mods won't fire anything below 1.2 ohms. If you wrap a coil for a VV/VW above 4 ohms, your not going to get a good vape, because in order to get a good vape, the voltage you use needs to be at least double your ohms, and VV/VW mods don't go above 6 volts. So at 4.1+ ohms, even if you put your VV/VW mod at 6 volts, its not enough voltage.

If your using a mechanical mod, your relying on the battery's internal voltage output to give you a good vape. A battery fresh off the charger is going to put out 4.2 volts, it will quickly fall to around 3.5v and stay there for a bit until it reaches 3.2 volts (dead) So in order to double the voltage to the ohms for the longest time possible before your battery dies, you want your coils at or around 1 to 1.5 ohms. This is for a mechanical mod. The above paragraph is for a VV/VW mod.

You need a multimeter to be able to tell what resistance (aka ohms) your coil is even at, during & after you finish building it. Either a multimeter or a cheap VV/VW mod that will check ohms. You also need to read up on battery safety if your using a mechanical, because mechanicals have NO internal short circuit protection. If you use a LiIon battery & you short your atty, the battery will be like a pipe bomb. If your using IMR batteries & you short your atty, the battery can/will exert enough force to rocket your drip tip down your throat, or enough energy to give your lips, hand, or face, 3rd degree burns.

 

[gpang788]

Did a search for coil tester but didnt really show up anything.

You have any links to coil testers?

 

[gpang788]

If you use a LiIon battery & you short your atty, the battery will be like a pipe bomb. If your using IMR batteries & you short your atty, the battery can/will exert enough force to rocket your drip tip down your throat, or enough energy to give your lips, hand, or face, 3rd degree burns.

Now AM I SCARED!!

Rebuilding sounds really dangerous! ...

I am having second thougts now...

 

[Rickajho]

Just bought a nova, liking it so far and am attempting my 1st rebuild.

Just read about how some fellows rebuilt their novas and shorted out their batteries.

1) Question is what will happen to my battery if it shorts out?

In the most general sense, you are feeding the available current of the battery directly back into the battery. And bad things happen.

2) As my battery does not come with short protection, will it blow up in my face?
Link to batt: Electronic cigarettes|Electronic cigarette manufacturer|SLB E-cigarette|Sailebao Technology

That particular battery? Unknown. eGo type batteries normally have short circuit protection. That stops the eGo battery from firing - for a few times. Continue to fire it with a shorted device and the protection circuit pops open - rendering the battery useless at that point. It prevents you from blowing the battery - or your face - up but you no longer have a working battery.

3) How do I test the rebuild with a multimeter for a short? ( Am not electronics savy here )

I don't have a Nova in front of me but you touch one lead from the meter to the center post of the coil, the other lead to the outside area of the coil assembly. Have your meter set to read 200 ohms or less, see what you get.

4) Is checking for ohms important? If I over or under ohm, will it have an impact on the battery and lead to a failure?

It is very important, and more so if you using a battery or a mod that doesn't have a built in ohm testing function. Too low ohms on a battery like you are using will dramatically shorten the life span of the battery or may trip the protection circuit. Too high ohms won't give you much vapor production at all. Even if you decide to not rebuild yourself you still need to check new coils for shorts. They are mass produced items and are far from perfect every time.

 

[bosun]

Did a search for coil tester but didnt really show up anything.

You have any links to coil testers?

Here is one source:

..http://www.myvaporstore.com/2_in_1_Ohm_Voltage_Meter_p/ovm.htm

 

[sludgeheart]

Please before you go any further click on the link below. It's the best source on the internet to get familiar with rebuilding. It has been compiled by ECF member and pedagogue extraordinaire Baditute.
http://www.e-cigarette-forum.com/fo...4-7-information-resources-your-first-rba.html
I'm a noob like you, and refer to it constantly. Accidents will happen, you just don't want to be the cause of the one that burns your hand--or half your face.
Happy & safe vaping.