Hanna Instruments Edge - Page 37

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 buer, the “CFM” tag will blink. Press CFM to conrm calibration.
The calibrated value is then displayed on the 1st LCD line and the third
expected buer value on the 3rd LCD line.
After the second calibration point is conrmed, rinse and submerse the pH
electrode approximately 3 cm (1¼”) into the last buer solution and stir
gently.
If necessary, press the ARROW keys to select a dierent buer 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 buer, the “CFM” tag will
blink.
Press CFM to conrm 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 buer values or a single one.
Press CAL to return to measurement after the desired number of buers.
Note:
• When performing a new calibration or adding to an existing calibration
the rst calibration point will be treated as an oset. See page 33 for
details.
• Press CAL after the rst or second calibration point are conrmed 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
buer, “WRONG BUFFER” will blink. Check if the correct buer has been
pH
Calibration