Xylem MultiLab 4010-2 - Manual (Page 51)

MultiLab 4010-2 Dissolved oxygen (D.O.)
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3. Place the D.O. sensor in a solution that does not contain any dissolved
oxygen.
A solution not containing any dissolved oxygen can be prepared by
dissolving approx. 8 to 10 g sodium sulfite (Na
2
SO
3
) in 500 ml tap-
water. Carefully mix the solution. It may take up to 60 minutes until
the solution is free of oxygen.
4. Start the calibration with <CAL>.
Cal (calibration in water vapor-saturated air) or Comp (calibration via
Comparison meas. according to the Winkler method) is displayed.
The calibration point 1 (0%) is displayed.
5. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter flashes.
6. Wait for the AutoRead measurement to be completed (audio signal).
The display for the second calibration point is displayed.
03.04.2013 08:00
03.04.2013 08:00