Operational Guide
37
The “ ” along with “STIR” tag will be displayed and “WAIT” will blink on the
LCD until the reading is stable. When the reading is stable and close to the
selected buer, the “CFM” tag will blink. Press CFM to conrm calibration.
The calibrated value is then displayed on the 1st LCD line and the third
expected buer value on the 3rd LCD line.
After the second calibration point is conrmed, rinse and submerse the pH
electrode approximately 3 cm (1¼”) into the last buer solution and stir
gently.
If necessary, press the ARROW keys to select a dierent buer value.
The “ ” along with “STIR” tag will be displayed and “WAIT” will blink on the LCD
until the reading is stable.
When the reading is stable and close to the selected buer, the “CFM” tag will
blink.
Press CFM to conrm calibration.
At the end of calibration the instrument displays “SAVING”, stores the
calibration value and returns to normal measurement mode.
The calibration sequence may be reduced to two buer values or a single one.
Press CAL to return to measurement after the desired number of buers.
Note:
• When performing a new calibration or adding to an existing calibration
the rst calibration point will be treated as an oset. See page 33 for
details.
• Press CAL after the rst or second calibration point are conrmed and
the instrument will store the calibration data. Then it will return to
measurement mode.
• If the value measured by the instrument is not close to the selected
buer, “WRONG BUFFER” will blink. Check if the correct buer has been
pH
Calibration