Question about multimeter vs using mod

[dzow05]

Hello everyone.. Been lurking here for a while now and this is my first post. I thank you all for the advice and tips and I now have my kfl+ vaping extremely well.

Recently bought a multimeter for sake of building on. My meter is giving me an ohm reading of 2.01 and my provari is reading 1.8. What is going on here?

 

[dzow05]

Here's my setup. Absolutely loving it.

 

[EL Pistoffo]

Unless its a really cheapo multi-meter or its plain bad, I would trust the multi-meter. Try verifying with another decent multi-meter if you can. Also make sure your not touching any the coil or assembly with your fingers when measuring, it may or may not skew the reading. Both measurement were done under same conditions e.g. juice in tank or empty, correct.

 

[suspectK]

What kind of meter are you using? Is there a zero button? Touch leads together. If you or the meter doesn't 0 out, you can touch leads together and subtract that from your measurement.

 

[dzow05]

L2rotate.. Can you tell I'm new here?

 

[Traver]

Before anything else touch the contacts on the multimeter together and see if it reads 0. If not you need to zero the meter or subtract that number when you are using it.

 

[dzow05]

It seems to be a cheap multimeter it has no zero out.

 

[EL Pistoffo]

It seems to be a cheap multimeter it has no zero out.

Is it zero when the leads are shorted out together?

 

[dzow05]

Wait I thought multimeter and ohm checkers were the same thing.. So I guess I have an ohm checker just a black box with a 510

 

[EL Pistoffo]

Wait I thought multimeter and ohm checkers were the same thing.. So I guess I have an ohm checker just a black box with a 510

Oh...yeah we were on different pages.

I can't speak for the box. What I would do is buy a few precision resistors from a place like Radio Shack and measure them on both devices to see which was off. But that may not actually be a such a simple thing for you to do.

Maybe you could get an inexpensive multi-meter. It should be fairly accurate. Lots of places sell them and you could find out which of the devices is off reading.

 

[dzow05]

I have built a few coils now and they always seem to be ~.2 ohms apart in my reading.. The provari always reading lower. So I guess that's just the way it is with this particular box / ohm reader.

 

[dzow05]

Thanks for your help

 

[EL Pistoffo]

It would still be nice to know which is right. 0.2 ohms has some bearing in coil builds and vape.

 

[dzow05]

Something makes me want to trust the high end mod vs a cheap piece of Chinaplastic. I really only use it as a deck to hold the Kfl base when building.

 

[jonnio]

To get a true resistance reading on a coil that small you would need a really high end multi-meter. The best will actually use 4 wires to run a measured current through the coil and then check a measured voltage drop across it and do the math.

If I had to choose which to believe I'd run with the provari -- not because it's right, but because it will adjust its voltage based on its measurement if you put it in a VW mode. If you're going to adjust your own voltage then just pick a meter and use it all the time and adjust accordingly. Eventually the error will zero out in your process.

 

[EL Pistoffo]

To get a true resistance reading on a coil that small you would need a really high end multi-meter. The best will actually use 4 wires to run a measured current through the coil and then check a measured voltage drop across it and do the math.

If I had to choose which to believe I'd run with the provari -- not because it's right, but because it will adjust its voltage based on its measurement if you put it in a VW mode. If you're going to adjust your own voltage then just pick a meter and use it all the time and adjust accordingly. Eventually the error will zero out in your process.

I thought Provari didn't do VW

I have a good Fluke Multi-Meter so I go fine by that.

 

[suspectK]

If I had to choose which to believe I'd run with the provari -- not because it's right, but because it will adjust its voltage based on its measurement if you put it in a VW mode.

Provari isn't a vw mod.

Edit..look at the multimeter as more than a vaping accessory. It's worth it's weight in gold. I use flukes, but my 1587 and 99b was free for work. As long as it can be calibrated, I see that as a good investment.

 

[jonnio]

I thought Provari didn't do VW

I have a good Fluke Multi-Meter so I go fine by that.

Yeah, my bad, Provari is only VV

 

[Traver]

I have one of those black boxes, several millimeters and a Provari. Between the black box and Provari I would definitely go with the Provari.

 

[EL Pistoffo]

I have a carto that reads 2.9 ohms on my MVP 2. With my Fluke meter it reads 3.1 ohms. So my mod is 0.2 ohms off as well. My meter is calibrated.