Hanna Instruments HI 88713 - Manual (Page 12)

22 23
Note: The reading of the first point could be skipped for FNU and NTU modes by pressing “Skip”
functional key. In this case, the 0.00 value will be used for calibration.
• Place the cuvette for first calibration point:
• <0.1 FNU (NTU) calibration cuvette for all
modes except FAU mode.
• 15 NTU formazin prepared standard for FAU
mode.
Note: For the FAU mode, if necessary, press UP
or DOWN key to edit the calibration point value
to match the exact value of the standard.
• Close the lid and press “Read” functional key. The display will show the value blinking and the
light 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 is displayed.
SECOND POINT CALIBRATION
•
Remove the first calibration cuvette.
• Place the cuvette for second calibration point:
• 15 NTU (FNU) calibration cuvette for NTU
ratiometric mode.
• 15 NTU formazin prepared standard for NTU
non-rating and FNU modes.
• 100 NTU formazin prepared standard for FAU mode.
Note: If necessary, press UP or DOWN 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 “Read” functional key.
The display will show the value blinking and the light icon during measurement.
• At the end of the measurement, the third proposed calibration point is displayed.
• At this moment it is possible to exit calibration by pressing “End” functional key.
• If the calibration is terminated, the display will briefly
show “Store...” and the two point calibration is saved.
The instrument returns to the main screen.
THIRD CALIBRATION POINT
•
Remove the second standard cuvette.
• Place the cuvette for third calibration point:
• 100 FNU (NTU) calibration cuvette for NTU
ratiometric mode.
• 100 NTU formazin prepared standard for NTU
non-ratio and FNU modes.
• 750 NTU formazin prepared standard for FAU mode.
Note: If necessary, press UP or DOWN 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 “Read” functional key.
The display will show the value blinking and the light icon during measurement.
• At the end of the measurement, the fourth proposed calibration point is displayed.
• At this moment it is possible to exit calibration by pressing “End” functional 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.