Nova-Tech 2700 Series Benchtop Meters - Manual (Page 18)

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6. pH Calibration (with custom buffers)
Buffer Group pH Values
CUSTOM Any 2 - 5 values, ≥ 1.0 pH unit apart
1) Turn meter on, press MODE if needed for pH measurement mode.
2) Rinse the pH and ATC electrodes then submerse in your custom pH buffer—
any pH value can be used.
3) Press CAL (enter password if required) to enter calibration mode. If desired,
select CLR-C to clear the previous calibration. The lower pH value
corresponds to the factory default setting for reference. When stable, use the
up/down arrows to adjust the upper pH value to your custom pH buffer value.
4) Press ENTER to accept the calibration value. When successful, the accepted
value will be visible inside of a beaker icon.
For best results, enter the value of the buffer that corresponds
to the measured temperature. For example, pH 10 buffer is
actually 10.06 at 20°C, so adjust to 10.06 instead of 10.00 if
the temperature is 20°C.