Hanna Instruments HI 9829 - Manual (Page 50)

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• Press <Confirm> to accept the calibration point and to continue with second
standard.
• Clean out the calibration beaker and refill with
20.0 FNU standard.
• Immerse the sensor in the 20.0 FNU rinse
beaker and then shake off excess solution.
Place the sensor into the 20.0 FNU calibration
beaker and take measures to eliminate bubbles from the optical area.
• When the reading is stable the display shows the “Ready” message.
• Press <Confirm> to accept the second calibration point. The calibration can
be stopped after the 20FNU point. Press ESC.
Storring will be displayed followed by Calibration
completed. Press <OK> or <Measure>.
Alternately, to continue with third standard:
• Clean out the calibration beaker and refill with
200.0 FNU standard.
• Immerse the sensor in the 200.0 FNU rinse beaker and then shake off excess
solution. Place the sensor into the 200.0 FNU calibration beaker and take
measures to eliminate bubbles from the optical area.
• When the reading is stable the display shows the “Ready” message.
• Press <Confirm> to accept the third point and save the calibration.
• After confirmation, the following messages are displayed: “Storing” and
“Calibration completed”.
• Press <OK> to return to the “Calibration” menu.
• To return to the main menu, press ESC twice.
• Press <Measure> to return to the measurement screen.
• To restore the factory calibration data, select the corresponding option in the
“Turbidity calibration” menu and then press <Select>.
Note Note Note Note Note The calibration procedure can be terminated after 1 or 2 points by
pressing <ESC>. A single point calibration is only recommended to
update the offset of a previous 2 or 3 point calibration. A 2 point
calibration is recommended when the expected turbidity readings
are below 100 FNU.
• The current turbidity value, the standard value and “Not ready...” are displayed
and a stability timer counts down.
• When the reading becomes stable, the display shows the “Ready” message.