Hanna Instruments HI 83414 - Manual (Page 27)

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• Close the lid and press the Read key. The display will show the value blinking and the lamp icon
during measurement.
• If Non ratio Turbidity range is selected, the
display will briefly show “
Store...” and the two
point calibration is saved. The instrument returns
in the main screen.
• If Ratio Turbidity range is selected, at the end
of the measurement, the third proposed calibration
point (100 NTU) is displayed.
• At this moment it is possible to exit calibration
by pressing the
End key.
• If the calibration is terminated, the display will briefly show “ Store...” and the two point
calibration is saved. The instrument returns in the main screen.
THREE-POINT CALIBRATION (Ratio Turbidity only)
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 to the sign on the
instrument top.
• Close the lid and press the
Read key. The
display will show the value blinking and the lamp
icon during measurement.
• At the end of the measurement, the fourth
proposed calibration point (750 NTU) is displayed.
• At this time it is possible to exit calibration by
pressing the
End key.
• If the calibration is terminated, the display will
briefly show “
Store...” and the three point
calibration is saved. The instrument returns in the main screen.
FOUR-POINT CALIBRATION (Ratio Turbidity only)
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
fourth prepared formazin standard) into the holder,
with the cuvette mark aligned to the sign on the
instrument top.