General Category > Equipment and Software
How to use a pH meter
Pinski:
I bought a pH meter last night and was reading some past posts to prepare to use it next week, great discussion here. So I think the biggest questions I have are... At what points in the mash process should samples be taken and tested and if necessary, adjustments made? At what point do you stop sampling/adjusting? Pre-boil? Pre-pitch?
hokerer:
--- Quote from: Pinski on March 23, 2012, 08:28:45 AM ---I bought a pH meter last night and was reading some past posts to prepare to use it next week, great discussion here. So I think the biggest questions I have are... At what points in the mash process should samples be taken and tested and if necessary, adjustments made? At what point do you stop sampling/adjusting? Pre-boil? Pre-pitch?
--- End quote ---
The only time I really check/worry about pH is at the beginning of the mash. Mash in and give it a little time to settle and then check the pH. Add whatever that reading tells you that you need to add, give it a little more time and check the pH again to see that your additions did what you expected.
brewmichigan:
Martin I hope you save all this info in a word doc or something so you just cut and paste when someone else asks a similar question in the future. I'd hate to write all that down all the time. Very good info indeed!
redzim:
Can anyone recommend to me a decent pH meter that they use? I have been using a Milwaukee MW102 for a year and sadly it does not seem consistent. Drifts all over the place even in buffers. I just sent it in to the factory, they replaced the temp probe and and returned it to me but it still does wierd stuff like this: you calibrate it in 7.01 buffer, then in 4.10 buffer, and if you leave it in the 4.01 buffer, within 1 minute it is reading 3.85 or 3.90.... or if, after calibration, you measure a sample of mash, vinegar or windex, then rinse the probe and put it back into the 4.01 buffer, it can read anywhere from 3.60 to 4.20... but certainly not right around 4.01....
Anyone have a better manufacturer to recommend to me? I'm getting a little fed up with Milwaukee... I'm on the phone with their techs about every brew session lately.... or can anyone tell if I am doing something wrong?
-red
euge:
Hanna instruments are available everywhere and are reliable: http://www.hannainst.com/usa/subcat.cfm?id=002
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