I got a Milwaukee ph56 for Christmas. It seems simple enough, so I feel funny asking questions, but I can't find the answer on the Milwaukee website.
When I calibrate, the first three or four times I try, I get "wrng" as a message when I move to the 4.01 buffer solution. It does seem to calibrate, though. After a few times of attempting, it does work. This just doesn't seem right to me at all.
The next thing is it takes a really long time to "lock in" to a pH. I mean, a really long time. The instructions say to gently stir, and that seems to speed it up. But it takes several minutes, moving very slowly to go to a pH and settle.
When I left it sitting in the 4.01 buffer, (the instructions say you can), the pH reading eventually dropped to 3.89. That's a big difference! Is that supposed to happen- it seems like if the 4.01 buffer is 4.01, that the meter wouldn't read differently!
When I calibrate, the first three or four times I try, I get "wrng" as a message when I move to the 4.01 buffer solution. It does seem to calibrate, though. After a few times of attempting, it does work. This just doesn't seem right to me at all.
The next thing is it takes a really long time to "lock in" to a pH. I mean, a really long time. The instructions say to gently stir, and that seems to speed it up. But it takes several minutes, moving very slowly to go to a pH and settle.
When I left it sitting in the 4.01 buffer, (the instructions say you can), the pH reading eventually dropped to 3.89. That's a big difference! Is that supposed to happen- it seems like if the 4.01 buffer is 4.01, that the meter wouldn't read differently!