Hanna Instruments HI 98703 - Manual (Page 24)

24
• At the end of the measurement, the third
calibration point (100 NTU) is displayed on
the primary LCD, “
CAL P.3” on the secondary
LCD, and “ READ” tag will blink.
• At this moment it is possible to exit calibration
by pressing CAL. 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
prepared formazin standard) into the holder,
with the cuvette mark aligned with the sign on
the instrument.
• Close the lid and press READ . 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.
• At this moment it is possible to exit calibration
by pressing CAL. The instrument will memorize
the three-point calibration data and will return
to measurement mode.
FOUR-POINT CALIBRATION
To perform a four-point calibration, continue the
procedure with the following steps:
• Remove the third standard cuvette.
• Place the 750 NTU standard cuvette (or the
prepared formazin standard) into the holder,
with the cuvette mark aligned with the sign on
the instrument.