User Guide

16
The default buffer set is the one used for last calibration,
even if the procedure was not completed.
• Once confirmed the set of buffer val-
ues, the primary LCD shows the
measured pH value, while the second-
ary LCD displays the first required buffer
value.
Two-point calibration
• Remove the protective cap from the pH
electrode and immerse it into the buffer
solution (e.g. pH 7.01) together with
the Potential Matching Pin and the tem-
perature probe, then stir gently.
Note The electrode should be submerged ap-
proximately 4 cm (1
1
/
2
’’) in the solution.
The temperature probe has to be located
as close as possible to the pH electrode.
Note When it is not possible to immerse the Potential Matching Pin
together with the pH electrode in the solution, disable the
differential input by setting setup item I.04 to “OFF”.
• When the reading becomes stable, the
probe indicator will stop flashing (after
about 30 seconds), and if the pH value
is close to the selected buffer, the
“CFM” indicator will start blinking, oth-
erwise the “WRONG” indicator, the pot
and the BUF tags will start blinking.
• In the first case press the CFM key to confirm calibration.
The meter will show the scrolling message “Press CFM again
to confirm the current buffer or right to escape” (to prevent
from confirming the calibration point inadvertently).
Pressing again CFM, the secondary LCD will display the
second expected buffer value.