Hanna Instruments HI 9829 Instruction Manual page 49

• 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. Observe the precautions
noted above for bubbles.
• When the reading is stable the display shows
the "Ready" message.
• Press <Confirm> to accept the second
calibration point and 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. Observe the precautions
noted above for bubbles.
• 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 compl e ted".
• 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 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 only recommended when the expected turbidity readings
are below 40 FNU.
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