Hanna Instruments HI 2002 User Manual

Operational Guide
26
When the reading is stable and close to the selected
bu er, the “CFM” tag will blink. Press CFM to con rm
calibration.
After con rming the  rst calibration point, the
calibrated value will be displayed on the  rst LCD line
and the second expected bu er value on the third LCD
line. (i.e. pH 4.01)
Rinse and submerse the pH electrode approximately
3 cm (1¼”) into the second 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.
The calibrated value is then displayed on the  rst LCD line and the third expected
bu er value on the third 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 mode after the desired number of bu ers
have been calibrated.
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 24 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 used,
or clean the electrode by following the Cleaning Procedure. If necessary,
change the bu er or the electrode.
pH
Calibration

Hanna Instruments HI 2002 Specifications

General

Brand	Hanna Instruments
Model	HI 2002
Category	Measuring Instruments
Language	English