is my ohm meter crap?

[dykealiscious]

Just got an eleaf ohm meter. Took a coil top atomized I built that works and tested it. Its 32g micro coil I think 9 or 10 wraps on a 1/16 drill bit, cotton, and it tested at 3.9 ohms. That doesn't make sense. Put my variable voltage matrix-s battery on it and each setting hung out at 3.5 volts. New batteries. Please tell me its not a piece of crap. I don't wanna buy a new one. :-( I'd rather know it is user error.

 

[Saltraker]

Using the calculator located at PV Web Apps, the ohms should peg out at about 2.4. Have you subtracted the internal resistance of the meter...although I wouldn't think it would be as high as 1.5 ohms.

 

[PaulBHC]

Here is a coil calculator that should give you an idea of how a build is going to turn out.

Coil wrapping | Steam Engine | free vaping calculators

Is your ohm meter the kind that you screw on the atty or one that has pointy probs that you touch the coil wire with?

High readings can come from loose parts or wire sticking out touching things.

 

[Cloud Junky]

32ga it sounds about right

 

[Cloud Junky]

Pull a few coils out say to final with 6 on the 32ga you should be in the 1.5-2.0 range

 

[Cloud Junky]

More coils = higher resistance
less coils = lower resistance

 

[dykealiscious]

How do i know the internal resistance f the meter?

 

[ClanMcCloud]

Just got an worst ohm meter. Took a coil top atomized I built that works and tested it. Its 32g micro coil I think 9 or 10 wraps on a 1/16 drill bit, cotton, and it tested at 3.9 ohms. That doesn't make sense. Put my variable voltage matrix-s battery on it and each setting hung out at 3.5 volts. New batteries. Please tell me its not a piece of crap. I don't wanna buy a new one. :-( I'd rather know it is user error.

There could be a few causes, but first thing, what ohmmeter are you using? Are you testing right on the coil itself or in the atomizer? Perhaps there's some juice or buildup in the connector that would cause a high reading. Not to mention, I've heard that coils can go up in value as they get used. Hey, it's a chance to build a new coil?

 

[dykealiscious]

Yes you screw it on. I have read a dozen forums from multiple sites on microcoils and this wrap should be getting 1.5-2.0 depending. That is why i suspect the meter.

 

[dykealiscious]

Its a brand new coil. Ill check for juice. Its an e-leaf.

 

[thebanik]

Yes you screw it on. I have read a dozen forums from multiple sites on microcoils and this wrap should be getting 1.5-2.0 depending. That is why i suspect the meter.

Are you sure you have read about 32g? Because 32g with 10 wraps does sound high resistance to me.

Edit : Just used the calculator, and it shows you need 12 wraps for 3.9 Ohms, which sounds just about right. So your meter is fine but you need to work on your coil building skills, .

Just kidding, . As you said Practice makes man perfect.

 

[dykealiscious]

Nice tool! Practice makes perfect. If i try again and reduce the coils we shall see if it comes closer to the tool estimate. If not, may be the meter. But does it matter if it is micro or spaced? Its so much easier and obviously you don't get spacing issues with micro.

 

[WarHawk-AVG]

32 ga 5-6 wraps hits approx 1.8 - 2.0Ω for me almost every time, so 10 wraps is going to be darn near 4Ω
30 ga on the other hand, I hit 10 wraps to get right at 1.8Ω, usually I have to wrap 12 to keep it above 2Ω
There is that much difference in the ga
My target resistance has always been 2.0Ω for my APV's...I try to go for 1.8Ω for my regulated eGo style batteries...I don't sub ohm
All my regular coil Protank style coils I vape at 6.5watts, my genesis style attys I run at 8 watts

Check the batteries in your meter too...if they are getting low it can throw off resistance as it runs volts thru the wire then measures the loss, too low a voltage (due to low batteries) equates to higher than normal resistance readings

 

[dykealiscious]

Hmm I've not gone over 10 coils though. I first found a reddit thread on this. Then found an amazing tutorial elsewhere and a couple here. I shall try try again. See that's why I like microcoils, you can't really screw them up. Once you heat to red then press them together it is a nice, perfectly even micro. C'eat la vie!

 

[ClanMcCloud]

I just built a bunch of coils this morning, I'm a total noob FWIW, but I found 5-7 wraps makes for just about 2.5 ohms, give or take. 32awg kanthal is pretty springy, so none of the coils I made were fit for a picture, but do produce pure goodness. I think you can trust the ohmmeter.

 

[dykealiscious]

But I was under the impression microcoils needed more wraps since you condense the coil space down.

This is a big help, all!

 

[dykealiscious]

So it doesn't matter if its micro or not?

 

[dykealiscious]

I've got 100 ft of 30g on the way so I'm going to have to adjust anyway. Lol Id bought just a foot of ekowool that came with 10ft of free 32g, so that's what I've been practicing with.

 

[WarHawk-AVG]

So it doesn't matter if its micro or not?

no...the wire carries the current and heats up...it eventually builds up a layer on it that is electrically resistance. Micro coil allows you to use thicker wire in a smaller space than spread out thinner wire.

 

[ClanMcCloud]

So it doesn't matter if its micro or not?

It shouldn't matter. In fact (if I have my facts right), it's impossible to make a micro coil out of 32awg wire and not have absurdly high resistance. I did exactly the same thing you did and made a micro coil out of 32awg kanthal and kind of went, 'huh?' at the resistance.

So I think the solution is to use 5-6 wraps and wider spaced. It shouldn't affect anything, really. To make a true micro coil you'd need to use thicker wire like 28awg kanthal, or use 2-3 strands of 32awg and twist it together. Then make the 9 or 10 wrap micro coil out of that!

Happy building!