Inaccurate ohms on multimeter?

[ebarrios]

d'oh! I dropped my $10 510 connector ohm reader and it won't turn on any more.

I have a backup (cheapo) digital multimeter but when I just touch the leads together it already reads .6 ohms.

Does that mean that I can simply subtract .6 from an atomizer reading to get a real resistance measurement?

 

[jocat54]

Yep, that is correct.
The .6 is the resistance of the multimeter leads.

 

[marsos52]

yup,,, that how you do it...........generally speaking multi-meters are not the most accurate at reading low ohms. but it can be done..

 

[Justice]

A cheaper meter will typically read more ohms when you touch leads but yes just subtract and you should be close enuf I have a few meters here the one i prefer to use shows .3 and my other good one shows 0 but its all relevant in the end

 

[supertrunker]

it matters a great deal if you make low or sub 1Ω coils, because of the increase in power. If you make them over 1, np. If not then 0.3 Ohms difference is a world apart. Let's try 0.5 apart and see:

2Ω coil, 4.2v battery = 2.1A - this is Amps, not milliamps or such - the real Mccoy. 8W of power, so a bit feeble really - like that crap light in a cupboard.

1Ω - 4.2, 17.6W - not bad, but getting so i don't really want it attached to my face.

0.5 any guesses? any more?


and now you are asking "what kind of power output can my battery handle?" That's a bad place to be.

T

 

[Justice]

it matters a great deal if you make low or sub 1Ω coils, because of the increase in power. If you make them over 1, np. If not then 0.3 Ohms difference is a world apart. Let's try 0.5 apart and see:

2Ω coil, 4.2v battery = 2.1A - this is Amps, not milliamps or such - the real Mccoy. 8W of power, so a bit feeble really - like that crap light in a cupboard.

1Ω - 4.2, 17.6W - not bad, but getting so i don't really want it attached to my face.

0.5 any guesses? any more?


and now you are asking "what kind of power output can my battery handle?" That's a bad place to be.

T

I didn't mean the difference in ohms was no buggy I meant the different zeroing point isn't an issue so long as you know what it is most meters nowadays are close enough tolerances it shouldn't make a huge difference