Craig,
If you are seeing 7.1 while the probe is sitting in pH4 solution, please recalibrate and test again.
An acceptable deviation is +/- 0.1
Type: Posts; User: Vinny
Craig,
If you are seeing 7.1 while the probe is sitting in pH4 solution, please recalibrate and test again.
An acceptable deviation is +/- 0.1