Testing OG

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Hootsmon

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Hi,
When is the right time to take a sample to test the OG. Just before you add yeast?
Cheers
 
As good a time as any and better than most.
Your hydrometer should have the temperature at which it is calibrated written on it, if not assume that it's 20oC, any hotter or colder you need to apply a correction and as that's close to most pitching temperatures, yes its a good time.

As you are fairly new I will state the obvious, don't take offence if you already know all this, its likely that others wont.
Don't throw the hydrometer in and try to read it.
Take a sample from the tap, run off a little 50mL give or take (what is in the tap body may not be the same as the rest of the beer) then fill the hydrometer jar.
Allow the hydrometer to sit in the wort for 10 minutes or so (lets the temperatures all equilibrate), spin it to knock off any bubbles and make sure it is floating freely before reading (not sticking to the sided).
Don't pour the wort in the test jar back into the fermenter, almost guarantees an infection, I usually (well always) taste it.

All really basics, but good brewing practice is largely about doing basics well and consistently (and cleaning and cleaning and...)
Mark
 
Just remember if your making a kit to give it a really good stir.

I didn't once and mistakenly thought I was going to produce a barley wine instead of an average abv beer.
 
Thanks for the advice. Did as suggested and OG 1052 for a stout I'm doing as first brew.
 
Congratulations - now to get you addicted to brewing hum....
Keep it clean. Keep it cool.
Enjoy it's a great journey.
Mark
 
Thanks. Re temp it'll be in back room between 18-22 mostly. What's the ideal temp?
 
Somewhat yeast dependent. For most ales somewhere between 18-20 is very good. I'd suggest 17-22 is a reasonable range but you really don't want to exceed it and you want to avoid wild swings within.

Also bear in mind that the fermentation process generates its own heat so it may sit above ambient temperature by a few degrees.
 
Also note when doing your first hydrometer reading to pour a bit off to clear the tap as this usually contains the concentrated ingredients you first put into the fermented particularly if using tins etc (kit & kilo).
Cheers
 

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