Hanna Instruments HI 93414 - Manual (Page 30)

30
• Close the lid and press READ/TIMER . The
display will show blinking dashes and the icons
for cuvette, 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 cuvette.
• Place the 100 NTU standard cuvette (or the
third prepared formazin standard) into the
holder, with the cuvette 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 cuvette, 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.