Say I have a keg of beer at around room temp. (23C/73.4F). I want 2.2 volumes of CO2 carbonation so using this calculator I figure out I need to add 25.83PSI of pressure - some time later the beer is carbonated.
To serve the beer, I decant 5 litres at a time into a mini-keg which I keep in the fridge (3C/37.4F). The same calculator says that starting from scratch, I would only need to add 7.82PSI @ 3C. But the beer is already at the correct volume of CO2, just not the right temp.
Is it as straightforward as transfer & pressurise/spund to 7.82PSI and the beer in the mini-keg will still be at 2.2 volumes of CO2? Or does the temp. difference between the kegs make a difference?