User Guide

17
Only when the reading is
stable, "READY" and "CON"
will blink.
• Press the CFM key to con-
firm the calibration. If the
reading is not close to the
selected buffer, "WRONG
BUF
1
"
and "WRONG " will blink
alternatively. If the reading
is close to the selected
buffer, the meter stores the
reading (and adjusts the off-
set point). The buffer value is
then displayed on the primary
LCD and the secondary LCD
will display "4.01".
• Press the CAL key and the
calibration process is ended
with only the offset of the
meter calibrated.
For best accuracy however, it is recommended
that a two point calibration is performed (see
page 19).
One point calibration at pH 7.01 (STAN-
DARD):
• Immerse the pH electrode
and the temperature probe
into pH 7.01 buffer solution
and shake briefly.
Note: the electrode should be
submerged approximately
4 cm (1½") into the solution.
The temperature probe should
be located as close as pos-
sible to the pH electrode.
• Press the CAL key. The “CAL” and “
BUF
1
”
indicators will be displayed. The second-
ary LCD will display “4.01”.
CAL
1
BUF
pH
READY
CON
CFM
CAL
CAL
1
BUF
pH
WRONG
WRONG
1
BUF
HI 7007
4 cm
(1½
")
CAL