Best way to measure sub ohm

[Siochanai]

Hey everyone,

I have been messing around with sub ohming quite a bit as I love quality of vape it provides.

Currently I have been measuring my resistance with my fluke 87V in high res mode but I am not sure if the accuracy is good enough. I think the book says 0.2% + 1 but never mentions high res mode which gives 10 times the res aka down to .01.

What methods do you guys use...

 

[Siochanai]

Sorry for the double post but I should probably clerify. I understand ohm meters are not perfect. How would I hook up a atty to do say a 4 wire measurement.

 

[Froth]

Don't try to fight it, doing a 4-wire resistance measurement with a DMM is complete overkill. I tried in vain to produce a reliable result to the hundreths position using a standard DMM, the limitations of probes contacting a surface when reading such a small resistance is really frustrating as it fluctuates non stop basically. I tried hard to do it the way you're trying, but quite simply the DMM isn't the best tool.

You don't mention them, so I'll ask...are you opposed to using one of the little black Ohm checker boxes? I've had nothing but good performance out of the two I own and several of my friends use them without issues. They're literally designed for one thing, measuring a coil that is installed in an atomizer. For some odd reason there seems to be a lot of complaints about them that don't have much merit however lots of people use them without issues.

 

[Siochanai]

I have thougjt about using them but was not sure on the accuracy so was using my fluke. Such a pain measuring with probes. Any suggestions on a box with 510.

 

[State O' Flux]

I have thougjt about using them but was not sure on the accuracy so was using my fluke. Such a pain measuring with probes. Any suggestions on a box with 510.

The boxes from USA Ohm Meters are pretty good. They use China chips... but built to specification and assembled in the US. Fair pricing and good after-sale customer support.

Back when they were still Sunny vaping, I bought several as Christmas presents for friends. Before wrapping (wouldn't want to hand out crap X-mas presents ;-)), I tested them against a Fluke 88 with a Tech-Thing "Half-Ohm" adapter and a loaner Extech 4-wire milliohm meter.

The 'worst' one, which I kept for myself, varied 0.03Ω+/- max from my reference... the rest varied no more than 0.02Ω+/-.

Speaking of the Half-Ohm adapter - used with Fluke AC220 clips, and a good DMM... that combo makes for a pretty accurate and consistent milliohm meter.