So does one have to use an ohm reader that the atomizers will screw onto or could a multi Meter be used just as effectively
ohms reader... multi meter
- Thread starter kylebleich
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A multi metter should be fine i prefer a ohm reader i just do my builds on it the hit the switch to check the resistance.
Well I plan to eventually get one to build on and such just wondering if it could be a secondary purchase .. And I'm now thinking it can .. Thanks for the help
Depends on the quality of the multi meter. I've got a nice little digital one but haven't tried testing any coils with it. Easier to screw onto one that's made for that purpose rather than trying to hold the atomizer, get the meter leads in place while ensuring good contact and then reading it. You can get nice that will check ohm and battery voltage for less than $20.
Well I found a mod with a reader in it for 30 so I'm probably just gonna get it.. Hit 2 birds with one stone
You can get the eleaf ohm/voltage reader off eBay for about $10.
Both my Vamo and my wife's ProVari Mini claim the ohm reader is accurate per say. 1.2x reads as 1.3 on the mods.
Sent from my SM-G900V using Tapatalk
Both my Vamo and my wife's ProVari Mini claim the ohm reader is accurate per say. 1.2x reads as 1.3 on the mods.
Sent from my SM-G900V using Tapatalk
Better than nothing - but not by much. Readouts on APV's are almost always only one position right of decimal and that isn't enough to accurately measure anything. It's ok for the electronic PV that has it's own safety features built into it that won't let you fire a LR build it isn't designed to handle, but when it comes to doing atty checks for a mechanical "0.2" doesn't mean much when it might actually be 0.21 ohms or 0.29 ohms.
Same goes for batteries: "4.2" volts would be fine - it it isn't actually 4.28 volts and you are in reality over charging stuff and you don't know it because of the APV's display limitations.
Better to get an accurate dedicated ohm checker, combined with a cheap DMM to test battery voltage. Cheap multimeters are fine for correct voltage measurements but they just suck for measuring resistance in the low ranges we use. The typical cheap "Harbor Freight" meters I have tried have all measured a 1.8 ohm coil high by at least 4.0 ohms. In that respect - worthless.
Its not the quality, its what its designed for. You can very easily get a DMM that will do the job for $20 or quite literally spend thousands on one that doesn't. None of my Flukes that range in price from $100 to one that cost nearly two thousand can read ohms past one decimal point. Its not what they were bought for.
Meanwhile I've got a chepo DMM I bought at radioshack as a kid (when it was still around up here) that does a fine job with ohm readings in the ranges a vaper would want and I paid $15 for it.
I wouldn't trust a DMM below 1 ohm. I wouldn't trust an ohm reader from eBay unless I'd calibrated it myself with known resistances, but if I had, then it's going to be accurate enough. It's all about Full Scale and accuracy. A DMM might be accurate to 0.1% of full-scale, but full scale is generally 200 ohms. That 0.2 ohms will bite you hard below 1 ohm. The ohm meters are generally accurate to only 1%, but their full-scale is much lower, maybe 3 ohms or 10 ohms.
Even so, I wouldn't trust them to read a 0.06 ohm nickel coil. For that you need a wheatstone bridge and even then the contact resistance of the 510 connection will vary between the meter and the mod by enough to throw your measurement out.
The only physical property that is usually measured more accurately than 0.1% is time. Generally you can throw together something cheap that will get 1%. Good attention to detail will get you to 0.1%. Getting any more accurate is significantly difficult.
Even so, I wouldn't trust them to read a 0.06 ohm nickel coil. For that you need a wheatstone bridge and even then the contact resistance of the 510 connection will vary between the meter and the mod by enough to throw your measurement out.
The only physical property that is usually measured more accurately than 0.1% is time. Generally you can throw together something cheap that will get 1%. Good attention to detail will get you to 0.1%. Getting any more accurate is significantly difficult.
Keep in mind also that when using a DMM, that at these low ohms, the meter is also measuring the resistance of the meter leads. So short out the meter leads and either make note of the lead measurement to subtract that from your coil measurement, or use any zero or similar function on the meter to compensate. Even dirty connections where the leads plug in can give you a few tenths or higher in measurement.
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