Operational Guide
26
When the reading is stable and close to the selected
buffer, the “CFM” tag will blink. Press
CFM
to confirm
calibration.
After confirming the first calibration point, the
calibrated value will be displayed on the first LCD line
and the second expected buffer value on the third LCD
line. (i.e. pH 4.01)
Rinse and submerse the pH electrode approximately
3 cm (1¼”) into the second buffer solution and stir
gently.
If necessary, press the ARROW keys to select a different buffer 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
buffer, the “CFM” tag will blink. Press
CFM
to confirm calibration.
The calibrated value is then displayed on the first LCD line and the third expected
buffer value on the third LCD line.
After the second calibration point is confirmed, rinse and submerse the pH
electrode approximately 3 cm (1¼”) into the last buffer solution and stir gently.
If necessary, press the ARROW keys to select a different buffer 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 buffer, the “CFM” tag will
blink. Press
CFM
to confirm 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 buffer values or a single one.
Press
CAL
to return to measurement mode after the desired number of buffers
have been calibrated.
Note
:
•
When performing a new calibration or adding to an existing calibration the
first calibration point will be treated as an offset. See page 24 for details.
•
Press
CAL
after the first or second calibration point are confirmed 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 buffer,
“WRONG BUFFER” will blink. Check if the correct buffer has been used or
selected.
pH
Calibration
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