11
CFM
CFM
• When the reading is stable and close to the selected buffer,
“
READY
” message will appear and “
CFM
” message will blink.
• Press
CFM
to confirm calibration.
• The calibrated value is then displayed on the
primary LCD and the secondary LCD will display
the second expected buffer value.
• After the first calibration point is confirmed,
submerse the pH electrode and the tem-
perature 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.
Note
: The instruments will automatically skip the buffer used for the
first point. It also skips 6.86 if 7.01 buffer was used and vice versa.
Likewise, it will skip 9.18 if 10.01 buffer was used and vice versa.
• The “ ” symbol will blink on the LCD until the reading is stable.
• When the reading is stable, “
READY
” message will appear and
“
CFM
” message will blink.
• Press
CFM
to confirm calibration. The instrument will return to
measurement mode.
Notes
: • To clear previous calibration data enter calibration mode,
press and hold down
CFM
, then press
CAL
. The display will show
“
CLR
” and then return to measurement mode.
• If the value measured by the meter is not close to the
selected buffer, “
WRONG
” and “
WRONG
” messages will
blink alternately. In this case check if the correct buffer has been
used, or regenerate the electrode by following the cleaning
procedure (see page 18). If necessary, change the buffer or the
electrode.
