How To: Test Device Under Load -- Prodigy/Other Devices

[vapn]

I found a real cheap multimeter today for 6 bucks (HF)... What an awesome tool for those of use using these mods. It is really helpful to have this info Steve has posted for reference. Thanks a lot Steve. I have this written down and and keep it with the multimeter. Will also be helpful to test those new atomizers without dumping juice on them.
My question is when the atomizer is about to go bad will it have more or less resistance?

[gsa]

what is the resistance of a 901 atty?

[CaSHMeRe]

Hey GSA ...

I believe the one tested was 2.9 ohms if my memory serves me correctly ... They range though ... anywhere from 2.5 - 3.3 ohms from the 901/4075's I have seen.

[seminolewind]

My good attys measure 4-3.4 ohms. Anything more or less than that-my attys don't work very well.

[Kelemvor]

if checking the resistance of an atomizer, always subtract the internal resistance of the multimeter you use.

just hold the test leads together and read the ohms, before you make your test. after the test, subtract the internal resistance from your measured atomizer resistance.

lots of people just forget about that, and this leads to different / wrong results.

mine has an internal resistance of 0.8 ohms btw.
its not important if you just check if the atomizer is ok, but for comparism und such.

sorry if i went a bit offtopic

[SmokinScott]

Great post, thanks Steve!

[CaSHMeRe]

added the Prodigy V2 specs

[vapn]

Nice that the V2 has a bit more voltage than the V1 huh? Very good... Does this have to do with the material difference between Aluminum and Stainless?

[CaSHMeRe]

We shall see Vapnaway Prodigy V1 mechanical switches will be done within the next week or so, so I will test the same setup on a V1 and see what the results are

[funkybozu]

Hey Steve just wanted to ask
if I test the Vs at the tail cap
like touchind the bottom of the battery with one lead
and touching the body with the other
does that qualify as under load?