Good way to test watt accuracy between devices?

[ogvapes]

Been meaning to ask this for a while. I've noticed different mods seem to have a small discrepancy between output when dialed to the same settings. Any advice on how best to test it out other than just going from one to another? Cheers.

 

[Rossum]

A true RMS volt meter and a known resistive load with as low a TCR as possible.

 

[ogvapes]

A true RMS volt meter and a known resistive load with as low a TCR as possible.

Thanks @Rossum. Any recommendations on one for a cheapwad?

 

[Rossum]

Thanks @Rossum. Any recommendations on one for a cheapwad?

I'm afraid you're asking the wrong person if you're looking for cheapwad recommendations.

 

[ogvapes]

I'm afraid you're asking the wrong person if you're looking for cheapwad recommendations.

Fair enough

 

[Asbestos4004]

THAT accurate and cheap don't really go together.

 

[ogvapes]

THAT accurate and cheap don't really go together.

Party pooper! Ugh...should probably get back to work.

 

[Baditude]

Thanks @Rossum. Any recommendations on one for a cheapwad?

I'm afraid you're asking the wrong person if you're looking for cheapwad recommendations.

THAT accurate and cheap don't really go together.

 

[Asbestos4004]

I stand corrected. Plywood and some garage sale junk....maybe $50 or less, all in?

 

[ogvapes]

That is quite the setup

 

[ogvapes]

I stand corrected. Plywood and some garage sale junk....maybe $50 or less, all in?

I feel like I could just buy a new mod for that. It's a good idea...it's just not a very exciting $50 to spend...

 

[UlkaHuren]

Been meaning to ask this for a while. I've noticed different mods seem to have a small discrepancy between output when dialed to the same settings. Any advice on how best to test it out other than just going from one to another? Cheers.

For me it's using paralleled power resistors that measure close to 0.1Ω and an oscilloscope. You can use a good RMS AC voltmeter though.

 

[Rangertrix]

A used, but still calibrated, single channel oscilloscope can be had for fairly cheap.

Personally, I just use the set wattage from one mod as a baseline on another and just adjust to taste.