Ohm Reader for TC

[pariah]

Just wondering what ohms reader people are using for TC coils?

I built my first Ni200 coils for a Kayfun V4 yesterday and realised that the ohms reader that came with the coil master kit is unreliable with such small resistances. I was aiming for 0.065 ohms but eventually settled for a coil that comes in at .11 ohms on the SX mini but the ohms reader had showed it to be .2 ohms. I also had a coil that showed .02 on the ohms reader but was 0.05 on the SX. I have a multimeter from Maplins but that only goes to one decimal place, so again useless for TC.

Any advice for an accurate ohm meter or do you just rely on the device for an accurate reading?

Cheers.

 

[philTBA]

Just wondering what ohms reader people are using for TC coils?

I built my first Ni200 coils for a Kayfun V4 yesterday and realised that the ohms reader that came with the coil master kit is unreliable with such small resistances. I was aiming for 0.065 ohms but eventually settled for a coil that comes in at .11 ohms on the SX mini but the ohms reader had showed it to be .2 ohms. I also had a coil that showed .02 on the ohms reader but was 0.05 on the SX. I have a multimeter from Maplins but that only goes to one decimal place, so again useless for TC.

Any advice for an accurate ohm meter or do you just rely on the device for an accurate reading?


Cheers.

You may need to get a bit spendy to get the accuracy you want. ie. 521 tab. Lowest I've had mine was .14.
It won't pre fire below .2, but you wouldn't want that with an Ni coil anyway.

 

[danb]

I was aiming for 0.065 ohms

I also had a coil that showed .02 on the ohms reader but was 0.05 on the SX.

You should aim above 0.10 Ohm with Ni200, otherwise the change in resistance when the wire is heated is so tiny the device may struggle to measure it accurately. This can cause erratic temperature fluctuation.

How did you get 0.02 Ohm on your ohmmeter if it only has one decimal point?

I just use my mods to check resistance.

 

[philTBA]

You should aim above 0.10 Ohm with Ni200, otherwise the change in resistance when the wire is heated is so tiny the device may struggle to measure it accurately. This can cause erratic temperature fluctuation.

How did you get 0.02 Ohm on your ohmmeter if it only has one decimal point?

I just use my mods to check resistance.

It's his multimeter only read to single decimal.

 

[pariah]

You should aim above 0.10 Ohm with Ni200, otherwise the change in resistance when the wire is heated is so tiny the device may struggle to measure it accurately. This can cause erratic temperature fluctuation.

How did you get 0.02 Ohm on your ohmmeter if it only has one decimal point?

I just use my mods to check resistance.

The Coilmaster ohm reader goes down to 0.01ohm. The reason I was aiming for 0.065 ohms is thats the recommended ohms for the SX Mini in TC mode, that's what it says in the manual anyway. Thanks for the info on temperature fluctuation, I wasn't aware of this. There's a lot more to this TC than I thought!

 

[danb]

The Coilmaster ohm reader goes down to 0.01ohm.

Sorry, I didn't read your post properly, my fault

The reason I was aiming for 0.065 ohms is thats the recommended ohms for the SX Mini in TC mode, that's what it says in the manual anyway. Thanks for the info on temperature fluctuation, I wasn't aware of this. There's a lot more to this TC than I thought!

I'm surprised this is recommended, but if the mod can actually measure resistance that accurately then it should work.

However, a 0.065 Ohm build will be highly susceptible to static resistance from imperfect contacts (this problem gets worse the lower you build), so I would avoid building below 0.10 Ohm even if the mod can theoretically handle it for this reason. I've been mulling over these factors for about a week now and I'm going to to do a mega post on this subject soon and see what people think about it.

 

[pariah]

Sorry, I didn't read your post properly, my fault



I'm surprised this is recommended, but if the mod can actually measure resistance that accurately then it should work.

However, a 0.065 Ohm build will be highly susceptible to static resistance from imperfect contacts (this problem gets worse the lower you build), so I would avoid building below 0.10 Ohm even if the mod can theoretically handle it for this reason. I've been mulling over these factors for about a week now and I'm going to to do a mega post on this subject soon and see what people think about it.

Cheers danb, I look forward to the post. Seems to be so many variables with TC when you first start that it can be a bit daunting, having said that; my first build is working great on the Kayfun. Spent about 3 hours trying to get a coil I was happy with then another couple of hours playing with the joules and temperature on the Sx but it's worth the effort as the vape is the best i've had,