Millivolt (Mv) Calibration (Ph 6+ Only) - Oakton pH 5 Instruction Manual

Instruction Manual
If the calibration is not successfully stored into its memory, an error message "Er3" will
be displayed. This occurs when the slope is lower than 15mV/decade or higher than
90mV/decade.

3.3 Millivolt (mV) Calibration (pH 6+ only)

mV calibration is performed for Oxidization Reduction Potential (ORP / Redox)
measurements, where you can adjust its mV value as a base value for measurements.
To abort press CAL to revert to measurement mode.
1. Press MODE key to enter mV mode, the LCD displays "mV".
2. Dip the ORP electrode into a known standard solution, (e.g. Quinhydrone 255) and
swirl it until the reading stabilizes.
3. Press CAL key to enter mV calibration. The LCD shows "CA" momentarily before
flashing the mV reading.
4. To proceed calibration use INC key to adjust the reading to your desired value. The
maximum adjustment you can make is ± 50 mV. Pressing INC key continuously
allows you to scroll to the maximum allowable value and then loops back to the
minimum allowable value.
5. Press ENTER key to confirm calibration. The display shows "CO" momentarily and
meter reverts to measurement mode showing the current set value.
-12-
pH 5+, pH 6+, Ion 6+