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  1. G

    Trouble calibrating Bluelab Pen

    Yea I think I'm gonna soak it in the 7.0 solution overnight. Since I posted its gone down to 7.3 so hopefully it will read 7.0 in the morning. Also I don't really know the ph of the water I was soaking it in. I know milk has a ph of 6.6 so maybe I could check the calibration that way? Thanks for...
  2. G

    Trouble calibrating Bluelab Pen

    So I bought a bluelab pen on Sunday and I have been soaking it in fresh water since. When I put it in the 7.0 solution to calibrate it won't go down to 7.0 it's steady at around 7.4. Is this a normal thing with a uncalibrated pen? Should I just go ahead and calibrate it?
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