Brew date: July 12th
Brew #5 using the BIABacus

ECHO competition brew- "I Heart Me" American IPA 14B, inspired by a Bells Two Hearted recipe
'Adjust Auto-Efficiency by 9.0%'.

I did a full-volume mash for 90 minutes.

1. At 30 minutes, my gravity reading was... #1 tube ; 1.056 ; 13.8 brix
2. At 60 minutes, my gravity reading was... #2 tube ; 1.059 ; 14.6 brix
3. At 90 minutes, my gravity reading was... #3 tube ; 1.061 ; 15.0 brix
**** The weight of my grain bill was... 11173 grams ; 24.63 pounds
I did not mash my 'crystal', I did a Gordon Strong thing

Quick Bonus Questions

A. The weight of my grain bill was... 11574 grams ; 25.52 pounds ****total weight with 'crystal'
B. The volume of water I mashed with was... SWN; 46.71 L ; 12.34 G
C. My average mash temperature was... 153.5 F

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins)... 16 mins
2. At the start of mash-out, my gravity reading was...


A. After reaching mash-out temp, before pulling the bag, I waited (mins)... 15 mins <=== 'crystal added'
B. After I pulled the bag my gravity reading was... #4 tube; PLG ; 1.065 ; 16.0 brix


MAXI-BIAB
after adding my 7.5 L of MAXI water the GIK was;
#5 tube ; GIK ; 1.058 ; 14.2 brix
#6 sample ; EOBG ; 1.068 ; 16.6 brix

Because my kettle can hold the TWN and I have a sight glasss, I fill to this headspace to begin with.
As it is heating to strike temp, I add my brewing salts. At strike temp I drain into a bucket
until I get to the SWN amount needed. I save this bucket of water for the pre-boil dilution. My last
couple of brews I noticed that I wasn't using all this water, but never measured the volume.

Yesterday's brew I measured the un-used MAXI water remaining in the bucket, it was 1.5 L.

Did two brews yesterday but they were ad hoc. The measurements taken below were taken with a refractometer. In some instances though, I checked them against my two favourite hydrometers. (They are my two favourites because they are the only ones I have that read within one degree of each other - seriously .)

The variance between hydro and refrac in at least one instance was ridiculous.

Anyway, a very rushed day but here are the refrac measures I did get...

American Amber Ale

1.033 at 45 mins
1.043/1 at 60 mins
1.046 at 75 mins
1.049/4 at 95 mins
GIB = 1.050/5

American IPA

1.032 at 45 mins
1.036 at 60 mins
1.043/1 at 75 mins
1.053/6 at 95 mins
GIB = 1.052/0 (I'm pretty sure that was based on a hydro reading but can't remember. See how it is much lower than the 95 min refrac reading?)

joshua wrote:PP, Have you plotted the above numbers into a spreadsheet, and Graphed the data???

This was and still is the original aim of this thread Josh. We actually had (and hopefully still have) a mathematician lined up to analyse the data if enough people give it to us at three points. Getting thirty of these three data points is pretty hard.

Anyway, the end result of what info we do collect will be a logarithmic thing dependent on both time and gravity.


PP

I think that is one of the only good uses of a refractometer or my one at least Josh - lol .

You've given me an idea for my next brew day . What I might do is at the end of my mash, stir everything up thoroughly and dip a coffee mug into the wort so as it scoops out a good mix of grain and liquid. Then, if I can get my oven working at around mash temp, I'll put this micro mash in there and take a few refacto readings over several hours. When I notice no change, I'll take a proper gravity reading and see how it compares with my pre-boil one.

Goodonya Josh

Finally got all of the measurements for a brew. This was a Belgian Blond from Jamil's BCS (pre sugar addition). Used a refractometer for measurements. BIABacus said I should get ~1.049 at the end so it was close to my 1.051 I measured after I pulled grain.

I did a full-volume mash for 90 minutes.

1. At 30 minutes, my gravity reading was...1.038
2. At 60 minutes, my gravity reading was...1.043
3. At 90 minutes, my gravity reading was...1.045

A. The weight of my grain bill was...5624g
B. The volume of water I mashed with was...30.89L
C. My average mash temperature was...149

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins)...15min
2. At the start of mash-out, my gravity reading was...1.045

A. After reaching mash-out temp, before pulling the bag, I waited (mins)...5
B. After I pulled the bag my gravity reading was...1.051

Is this information still being collected? I only have pre boil and post boil figures for everything up to this point but I could take some more readings from here on out.

So these are my numbers from my sweet stout recipe that it currently boiling.
I did a full volume mash for 60 minutes
At 20 minutes my corrected gravity reading was 1.044 (It took about 11 minutes to cool the sample to 76 F)
at 40 minutes my corrected gravity reading was 1.045 (It took about 13 minutes to cool the sample to 71 F)
at 60 minutes my corrected gravity reading was 1.046 (It took about 17 minutes to cool the sample to 66F )
I did not do a mash out
I mashed in 3.22 gallons of water
My mash temps stayed between 154 - 156F (goal of 156) I check the temp every 8-10 minutes and add heat.
My total grain bill was 4.6 pounds

These are my numbers for today's American Wheat
I did a full volume mash for 60 minutes
At 20 minutes my gravity was 1.039
At 40 minutes my gravity was 1.042
At 60 minutes my gravity was 1.045
I did not do a mash out
Weight of grain bill was 4.22 pounds
Volume of water I mashed in was 3.39 gallons
Mash temps averaged about 151

Mad Scientist - I Heart Me IPA - For Brewday July 12 2014


Brew date: July 11th
Brew #6 using the BIABacus with 'Adjust Auto-Efficiency by 9.0%'.

I did a full-volume mash for 90 minutes.

1. At 30 minutes, my gravity reading was... n/a
2. At 60 minutes, my gravity reading was... 1.056 ; 13.8 brix
3. At 90 minutes, my gravity reading was... 1.057 ; 14.0 brix

Quick Bonus Questions

A. The weight of my grain bill was... 10879 grams ; 23.98 pounds
B. The volume of water I mashed with was... SWN; 48.83 L ; 12.90 G
C. My average mash temperature was... 149.5 F

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins)... 21 mins
2. At the start of mash-out, my gravity reading was... n/a

A. After reaching mash-out temp, before pulling the bag, I waited (mins)... 1 mins
B. After I pulled the bag my gravity reading was... n/a

MAXI-BIAB
After adding my 3.0 L of MAXI water the GIB was... 1.058 ; 14.2 brix

I did a full volume mash for 60 minutes.
At 20 minutes my gravity was 1.046
At 40 minutes my gravity was 1.049
At 60 minutes my gravity was 1.052
I did not do a mash out
The weight of my grain bill was 4.34 lbs
My TWN was 3.47 gallons
My average mash temp was 151 degrees

Today's figures for a 3Floyd's Zombie dust clone
I did a full volume mash for 60 minutes.
At 20 minutes my gravity was 1.043
At 40 minutes my gravity was 1.050
At 60 minutes my gravity was 1.051
I did not do a mash out
My grain bill was 4.42 pounds
Volume of water was 3.22 gallons
Average mash temp was 154F

Brewing a dark mild today.
At 20 minutes the gravity was 1.022
At 40 minutes the gravity was 1.026
At 60 minutes the gravity was 1.028 (goal was 1.029)
I did not do a mash out
Grain bill weight was 2.51#
Volume of water was 3.12 gallons
Average mash temp was 152

PistolPatch wrote: American Amber Ale

1.033 at 45 mins
1.043/1 at 60 mins
1.046 at 75 mins
1.049/4 at 95 mins
GIB = 1.050/5

American IPA

1.032 at 45 mins
1.036 at 60 mins
1.043/1 at 75 mins
1.053/6 at 95 mins
GIB = 1.052/0 (I'm pretty sure that was based on a hydro reading but can't remember. See how it is much lower than the 95 min refrac reading?)

What do the numbers mean that show "strange" gravity's? In this case 1.043/1; 1.056/6 etc

I had a couple of numbers like that in Section M of my last brew. However, in my case, they both read /0