In-Situ Aqua TROLL 400 Operators Manual - Manual (Page 26)

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6. In the software, select the Sensor Setup tab.
7. Select the RDO Dissolved Oxygen parameter.
8. Click Calibrate.
9. By default, 100% saturation is selected for the first point of the calibration. If you
intend to perform a 2-point calibration, also select 0% saturation from the drop-down
list. Otherwise, leave as “None.”
10. Click Next.
11. Enter the barometric pressure or elevation at which the instrument will be deployed.
12. Click Next.
13. Click OK to start the calibration.
14. When the screen indicates that the calibration has reached stability, click Accept to
complete the calibration, or click Cancel to return to the previous calibration.
Calibrate 0% Oxygen Saturation
1. If you selected to perform a 2-point calibration, you are prompted to set up the
solution for the second point of the calibration.
2. Remove the wet sponge from the cup.
3. Fill the calibration cup to the fill line with approximately 130 mL of fresh sodium
sulfite solution.
4. Gently place the instrument in the calibration cup, taking care to not force the
solution out the top of the calibration cup.