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16 years 7 months ago #19

Ok, changes made. Have a review just in case I messed it up. Something is burning on the stove <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D -->

16 years 7 months ago #20

I completely missed the 'Gravity' entry! <!-- s:oops: --><img src="{SMILIES_PATH}/icon_redface.gif" alt=":oops:" title="Embarassed" /><!-- s:oops: -->
TBH all you need is to leave it the way it was and put in a couple of redirects

Specific Gravity (SG) - see gravity
Original Gravity (OG) - see gravity
Final Gravity (FG)- see gravity

Not trying to be picky but the font in the new entries looked different to the rest - I assume this was intentional to make it easier to read the 'temporary' entries...

16 years 7 months ago #21

No, it wasn't intentional. Formatting can be a pain in the hole if the tags misbehave. I'll check it soon. About to start bottling my pumpkin ale <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile" /><!-- s:) -->

16 years 7 months ago #22

&amp;quot;Irish Party Ale&amp;quot;:2uo63oj8 wrote: [b:2uo63oj8]Alcohol By Volume (ABV)[/b:2uo63oj8] – a standard measure of how much alcohol is contained in an alcoholic beverage. It is expressed as a percentage of total volume and can be calculated as follows;
[b:2uo63oj8]ABV = (OG - FG) X 131 [/b:2uo63oj8]
where
[b:2uo63oj8]OG = Original Gravity [/b:2uo63oj8]
[b:2uo63oj8]FG = Final Gravity [/b:2uo63oj8]

Of course, now I have to define Original Gravity, Final Gravity, and Specific Gravity <!-- s:roll: --><img src="{SMILIES_PATH}/icon_rolleyes.gif" alt=":roll:" title="Rolling Eyes" /><!-- s:roll: -->

[b:2uo63oj8]Specific Gravity[/b:2uo63oj8] - the ratio of the density of liquid to the density water. This is normally measured by brewers twice (see [b:2uo63oj8]OG[/b:2uo63oj8] and [b:2uo63oj8]FG[/b:2uo63oj8]) to calcuale the [b:2uo63oj8]ABV[/b:2uo63oj8]. Measuring the Specific Gravity using a standard brewing [b:2uo63oj8]hydrometer[/b:2uo63oj8] should be carried out at 15 degrees Celcius (60F)

[b:2uo63oj8]Original Gravity[/b:2uo63oj8] - The [b:2uo63oj8]specific gravity[/b:2uo63oj8] of wort taken just before the yeast is added

[b:2uo63oj8]Final Gravity[/b:2uo63oj8] - The [b:2uo63oj8]specific gravity[/b:2uo63oj8] of beer taken just before the beer is moved from the fermenter to the bottle or keg.

I can see how putting the whole list together must have been a pain!! <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile" /><!-- s:) -->[/quote:2uo63oj8]

I don't think that value of 131 is correct. It should be approximately 0.136. Multiplying by 131 doesn't make any sense. For example if you had an OG of 1.060 and FG of 1.015 this would give an ABV of 6.1% using the 0.136 figure. The 131 figure doesn't work.

If we're talking gravities then we should add [b:2uo63oj8]attenuation[/b:2uo63oj8] as an entry. It's divided into real and apparent.

[b:2uo63oj8]Apparent attenuation[/b:2uo63oj8] is the the amount of sugar fermented and corresponds to the percentage of OG removed during fermentation. For example OG = 1.040 and FG = 1.010 then apparent attenuation = 30/40 x 100 = 75%.

[b:2uo63oj8]Real attenuation[/b:2uo63oj8] is the apparent attenuation corrected by a factor of 0.82, taking into account the differing density of the ethanol present in the beer, which causes the hydrometer to sink further into the beer.

16 years 7 months ago #23

Thanks Thom, figure corrected to 0.136.

You happy with the attenuation entries? I can add them later once I've cleaned up the kitchen.

16 years 7 months ago #24

I'm happy enough with the attenuation entries.

They're not really that important except perhaps for looking at the info on some of the yeast websites that give you attenuation data for different strains. This can give you an idea of how much residual sugar specific strains will give you in the beer.
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