Noob question about ohm reading on multimeter

[Vaprnoob]

Hi guys sorry for the noob, I have a quick question about my multimeter. I googled it but didnt find any explanation.

When I try to read the ohms of a coil I just built, just by itself, the ohm reading jumps around a lot or reads something nonsensical like 6 ohms.

When I attach the coil to the rda (Magma) then it reads normal like it should.

I suspect that there is some basic law of electricity that I don't know about, but I don't know anything about circuits and things.

The reason I want to read the resistance off of the atomizer is so that I can dial in dual coils as close as possible before installing them.

Thanks in advance for any help, and sorry for the noob!

 

[edyle]

Contact.

 

[edyle]

To get dual coils as close as possible, use the same roll of wire, wrap on the same mandrel/drillbit, wrap the same number of turns.

Before wrapping coils, look at the post positions on the atomizer, and decide how your want your coil legs to end up.
On some decks, the coil legs have to end up pointing in opposite directions; on some decks (example: most 3 post rda's), the coil legs end up pointing in the opposite direction.
Another thing I pay attention to is whether to wrap clockwise or anticlockwise; my instictive inclination is to wrap clockwise, but on typical rda decks, anticlockwise fits better to get the coil legs coiling clockwise on a post screw, and aligning more symmetrically

 

[Vaprnoob]

Thanks!

 

[Sgt.Rock]

When the Ohms jump around it's normally because something is not making good contact--either the leads from your meter are not making solid contact or the screws holding the coil leads may need tightening.

 

[Hightech Redneck]

Especially with low ohm builds, it may be your fingers. If you don't have clips for your meter, get some. The human body will conduct enough to throw off your meter if pressing the coil to the leads with your fingers.

 

[93gc40]

How many ohms does your meter read when you touch the leads TOGETHER?

But yeah jumping around signifies poor contact. You need clips and/or get yourself a 510 meter. The $5 ones work fine for most builds.

 

[Vaprnoob]

Ah I see, thanks 93. The contacts read something like 1.5 ohms when I put them together, but it reads less than that (I recently tested part of a circuit board that read very small resistance) when testing something.