Can all Pocket Colorimeter II instruments be reset to factory default?
Not all Pocket Colorimeter II instruments can be reset to factory default.
Only some models have this feature. Chlorine Dioxide, DO, Ozone, and the pH/Chlorine (pH channel) do not have the reset feature. Note: the only time resetting the default calibration would be helpful is when the calibration has been changed by the user (cal icon should be visible).