User Guide

13
CALIBRATION
A monthly calibration is recommended. To
check the date of last calibration, simply hold
the DATE/⇒ key down for few seconds.
A more frequent check of the instrument is
suggested by using the supplied standard solu-
tion.
CALIBRATION PROCEDURE
• Turn the meter on and
wait for the display to
show "----".
• Press the CAL key
once, the "CAL" mes-
sage will blink on the
display for about 6
seconds, then the cali-
bration mode stops.
• While the "CAL" mes-
sage is still blinking,
press CAL again. The
instrument is now in
the calibration mode
and a "CL" will appear
on the lower part of
the display. The date
of calibration can be
edited now by simply
pressing the DATE/⇒
key. To scroll to the
correct number press
the READ/⇑ key. The
default blinking pa-
rameter is the month,
on the left hand of the
display (MM.DD).