14
FIVE-POINT CALIBRATION
• Submerse the pH electrode and the temperature
probe approximately 3 cm (1¼”) into a buffer
solution and stir gently. The temperature probe
should be close to the pH electrode.
• Press
CAL
. The “
CAL
” and “ ” tags will appear
and the “
7.01
” buffer will be displayed on the
secondary LCD. The temperature compensation
mode tag is displayed also.
• If necessary, press the
ARROW
keys to select a different buffer value.
• The “ ” tag 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 primary
LCD and the second expected buffer value on the
secondary LCD.
• After the first calibration point is confirmed, submerse the pH electrode
and the temperature probe approximately 3 cm (1¼”) into the second
buffer solution and stir gently. The temperature probe should be close
to the pH electrode.
• If necessary, press the
ARROW
keys to select a different buffer value.
• The “ ” tag 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
primary LCD and the third expected buffer value on
the secondary LCD.
• After the second calibration point is confirmed, submerse the pH
electrode and the temperature probe approximately 3 cm (1¼”)
into the third buffer solution and stir gently. The temperature probe
should be close to the pH electrode.
