symphony1975
Well-Known Member
- Joined
- 21/9/09
- Messages
- 147
- Reaction score
- 21
hello,
recently i posted a question about my actual PH readings being different than what EZ water calc predicted and I got some great informative replies. I firstly wanted to eliminate the possible error in doing PH readings of samples at different temps. So I have since done 2 more brews, ensuring my calibration solutions and mash samples all were conducted at the same temps (25 degrees)........and still i am out!!!! I was hoping for the differences between the predicted and actual readings to be the same so I could just simply compensate in future brews but alas, they are all over the shop!
ok so brew 1 was a golden ale:
View attachment golden.tiff
grain bill:
pilsner 2.62kgs
munich .87kgs
wheat .87kgs
caramunich I .27kgs
my actual readings were:
@15 min in mash 5.23
@35 min in mash 5.27
brew 2 was a black IPA:
View attachment BIPA.tiff
grain bill:
maris otter 5.35kgs
victory (looked up online an said to put as roasted) .34kgs
wheat .34kgs
chocolate .29kgs
crystal .29kgs
midnight wheat .18kgs
my actual readings were:
@15 min in mash 5.11
@35 min in mash 5.07
I tried to be tricky and aimed for the same estimated PH to see if the difference may have been the same with actual readings.
My procedure is to take a sample in a glass jar at 15 mins and then at 35 mins (after i stir the mash) (i use single temp infusion mash). then later I take the time to calibrate the meter and ensure sample temps are right. Does the PH continue to chage over time? if I leave a sample for 4 or 5 hours would it read differently? when should I take the sample? given that I always get 2 different readings from 15 min or 35 min in mash
otherwise can anyone shed any light on what I am missing?
thanks heaps....
recently i posted a question about my actual PH readings being different than what EZ water calc predicted and I got some great informative replies. I firstly wanted to eliminate the possible error in doing PH readings of samples at different temps. So I have since done 2 more brews, ensuring my calibration solutions and mash samples all were conducted at the same temps (25 degrees)........and still i am out!!!! I was hoping for the differences between the predicted and actual readings to be the same so I could just simply compensate in future brews but alas, they are all over the shop!
ok so brew 1 was a golden ale:
View attachment golden.tiff
grain bill:
pilsner 2.62kgs
munich .87kgs
wheat .87kgs
caramunich I .27kgs
my actual readings were:
@15 min in mash 5.23
@35 min in mash 5.27
brew 2 was a black IPA:
View attachment BIPA.tiff
grain bill:
maris otter 5.35kgs
victory (looked up online an said to put as roasted) .34kgs
wheat .34kgs
chocolate .29kgs
crystal .29kgs
midnight wheat .18kgs
my actual readings were:
@15 min in mash 5.11
@35 min in mash 5.07
I tried to be tricky and aimed for the same estimated PH to see if the difference may have been the same with actual readings.
My procedure is to take a sample in a glass jar at 15 mins and then at 35 mins (after i stir the mash) (i use single temp infusion mash). then later I take the time to calibrate the meter and ensure sample temps are right. Does the PH continue to chage over time? if I leave a sample for 4 or 5 hours would it read differently? when should I take the sample? given that I always get 2 different readings from 15 min or 35 min in mash
otherwise can anyone shed any light on what I am missing?
thanks heaps....