23
TWO-POINT CALIBRATION
• Turn the instrument on by pressing ON/OFF.
When the LCD displays dashes, the instrument
is ready.
• Enter calibration mode by pressing CAL.
The display will show “CAL P.1” and no
suggested value. This first point is used to
check the optical system.
• Place the <0.1 FTU standard cuvet into the
holder and ensure that the cuvet mark is aligned
with the sign on the instrument top.
• Close the lid and press READ . The display
will show blinking dashes and the icons for
cuvet, detectors and LED will appear during
measurement. Alternatively, press LOG/CFM to
skip the first point.
• The second calibration point (15.0 FTU) is
then displayed on the primary LCD, “CAL P.2”
on the secondary LCD, and “READ” tag will
blink.
• If the prepared formazin is used, edit the
displayed value by pressing UP or DOWN keys
until the display shows the correct value.
• Remove the first standard cuvet and place the
15.0 FTU standard cuvet (or the prepared one)
into the holder and ensure that the cuvet mark
is aligned with the sign on the instrument top.
• Close the lid and press READ
. The display
will show blinking dashes and the icons for
cuvet, detectors and LED will appear during
measurement.
