I'm interested to know at what point people take their PH samples from the mash tun and what your readings are.
We are taking samples from the first runnings and last runnings however I'm getting consistently low results from my samples.
My first runnings sample taken approx 5 mins after opening the tap and before the sparge are in the region of 5.1-5.3 after being cooled to 20C using a non-ATC ph meter. After deducting .35 from the reading, you can see the mash PH is actually 4.8-5.0
My final runnings are around 5.4-5.6 at 20C SG1008. Again, taking .35 away makes this reading very low and nowhere near the upper end of the 5's as I would expect.
I would just like to clarify if most people take their samples at roughly the same time and what their cooled readings are. Our meter is a couple of years old and the probe might be on the way out because it takes quite a while to stabilise.
If your first cooled readings are 5.5-5.7 then I know I definitely need to adjust our water treatment regime or get a new PH meter! It has been calibrated by the way, using PH7 and 4 buffer solutions.
Cheers
We are taking samples from the first runnings and last runnings however I'm getting consistently low results from my samples.
My first runnings sample taken approx 5 mins after opening the tap and before the sparge are in the region of 5.1-5.3 after being cooled to 20C using a non-ATC ph meter. After deducting .35 from the reading, you can see the mash PH is actually 4.8-5.0
My final runnings are around 5.4-5.6 at 20C SG1008. Again, taking .35 away makes this reading very low and nowhere near the upper end of the 5's as I would expect.
I would just like to clarify if most people take their samples at roughly the same time and what their cooled readings are. Our meter is a couple of years old and the probe might be on the way out because it takes quite a while to stabilise.
If your first cooled readings are 5.5-5.7 then I know I definitely need to adjust our water treatment regime or get a new PH meter! It has been calibrated by the way, using PH7 and 4 buffer solutions.
Cheers
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