Hanna Instruments HI 88703 - Manual (Page 23)

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Note: The reading of the first point colud be skipped by pressing the Skip key. In this case, the
0.00 NTU point will be used for calibration.
• Place the <0.1 NTU standard cuvette (or the
cuvette with dilution water) into the holder and
ensure that the cuvette mark is aligned with 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.
Note: If the Average mode was previously selected, the measurement in calibration mode will be
done using the average.
• At the end of the measurement, the second
proposed calibration point (15.0 NTU) is
displayed.
• Remove the first standard cuvette.
• Place the 15 NTU standard cuvette (or the second
formazyne prepared standard) into the holder, with
the cuvette mark aligned with the sign on the
instrument top.
Note: If necessary, press
▲ or ▼ key to edit
each calibration point value to match the
exact value of the standard as measured
with a reference turbidimeter.
• 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.