FG after carbonation

Zambi · Jul 24, 2024

Can you (accuratel) measure FG after kegging and carbonation?
I generally forget when kegging

I'm talking force carbonation, so no extra sugar added and no spunding.

Can I just pour some beer, cover to prevent evaporation and let it sit for a day or so till flat?

Minbari · Jul 24, 2024

Zambi said:
Can you (accuratel) measure FG after kegging and carbonation?
I generally forget when kegging
I'm talking force carbonation, so no extra sugar added and no spunding.

Can I just pour some beer, cover to prevent evaporation and let it sit for a day or so till flat?

No, the carbonation will throw off the hydrometer. Degas the sample, then measure

Zambi · Jul 24, 2024

Minbari said:
No, the carbonation will throw off the hydrometer. Degas the sample, then measure

Yep, thats why I was thinking of letting it go flat first

Bigbre04 · Jul 24, 2024

Zambi said:
Yep, thats why I was thinking of letting it go flat first

i use a little milk frother thingy to "encourage" the bubbles to leave

Craigerrr · Jul 24, 2024

I pour the sample back and forth between glasses to get it to off gas so I can take the FG reading. You could always just leave a sample out overnight for the co2 to offgas, maybe just cover it with foil, or plastic wrap.

Zambi · Jul 25, 2024

Craigerrr said:
I pour the sample back and forth between glasses to get it to off gas so I can take the FG reading. You could always just leave a sample out overnight for the co2 to offgas, maybe just cover it with foil, or plastic wrap.

That's the plan...
Just have a beer, leave some in the glass, cover and next day do a refracto reading. Use the correction tables and see.

I was asking as I did do a test as described and my attenuation seemed low, so wanted to check if I did it the right way. I'll do another check

Donoroto · Jul 25, 2024

Zambi said:
Can you (accuratel) measure FG after kegging and carbonation?
I generally forget when kegging
I'm talking force carbonation, so no extra sugar added and no spunding.

Can I just pour some beer, cover to prevent evaporation and let it sit for a day or so till flat?

As everyone said, shake or otherwise de-gas the sample, then it is fine.