Hanna Instruments HI 98713 Instruction Manual page 24

• At the end of the measurement, the third calibration
point (100 FTU) 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 cuvet.
• Place the 100 FTU standard cuvet (or the
prepared formazin standard) into the holder,
with the cuvet mark aligned with the sign on
the instrument.
• Close the lid and press READ . The display
will show blinking dashes and the icons for
cuvet, detectors and LED will appear during
measurement.
• At the end of the measurement, the fourth
calibration point (750 FTU) 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 cuvet.
• Place the 750 FTU standard cuvet (or the prepared
formazin standard) into the holder, with the cuvet
mark aligned with the sign on the instrument.
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