I brewed a 5-gallon batch yesterday, measured the gravity with refractometer of the wort after sparge was done and all wort collected, right when I turned the heat up to start the boil, OWG was 1.047. Volume went from ~6.9 gal to 5 gal in the hour-long full boil. I forgot to take a gravity reading before pitching and covering carboy. When I realized it during cleanup, I went back and took a sample with some tubing. This gravity reading was 1.057.
I anticipated a gravity reading of 1.060, and if I increase gravity by the ratio the volume decreased, I get ~1.060.
5/6.9=0.725
2-0.725=1.275 (does that work to determine the increase in gravity?)
1.275(47)=59.94 (can I multiply the increase by the OWG to find calculated OG?)
I should probably get Daniels' book out, I am pretty sure I could find it there... but can you let me know if I'm right?
I think it is possible that some of the dissolved sugar settled, because my tubing just dipped into the wort, so my sample came from the top inch, and I think that gravity reading may be off.
I anticipated a gravity reading of 1.060, and if I increase gravity by the ratio the volume decreased, I get ~1.060.
5/6.9=0.725
2-0.725=1.275 (does that work to determine the increase in gravity?)
1.275(47)=59.94 (can I multiply the increase by the OWG to find calculated OG?)
I should probably get Daniels' book out, I am pretty sure I could find it there... but can you let me know if I'm right?
I think it is possible that some of the dissolved sugar settled, because my tubing just dipped into the wort, so my sample came from the top inch, and I think that gravity reading may be off.