30
• Close the lid and press READ/TIMER . The
display will show blinking dashes and the icons
for cuvet, detectors and lamp will appear during
measurement.
• At the end of the measurement, the third
calibration point (100 NTU) is displayed on the
primary LCD and “CAL P.3” on the secondary LCD
and “READ” tag will blink.
• At this moment it is possible to exit calibration
by pressing CAL/CHECK. The instrument will
memorize the two-point calibration data and
will return to measurement mode.
THREE-POINT CALIBRATION
To perform a three-point calibration, continue the
procedure with the following steps:
• Remove the second standard cuvet.
• Place the 100 NTU standard cuvet (or the third
prepared formazin standard) into the holder,
with the cuvet mark aligned with the sign on
the instrument top.
• Close the lid and press READ/TIMER
. The
display will show blinking dashes and the icons
for cuvet, detectors and lamp will appear during
measurement.
• At the end of the measurement, the fourth
calibration point (750 NTU) is displayed on the
primary LCD and “CAL P.4” on the secondary LCD
and “READ” tag will blink.
• At this moment it is possible to exit calibration
by pressing CAL/CHECK. The instrument will
memorize the three-point calibration data and
will return to measurement mode.
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