In-Situ Communication Device Kit for the Aqua TROLL 400 and RDO PRO Probe - Manual (Page 9)

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5. Wait 5 to 10 minutes for temperature stabilization prior to calibration.
Note: Do not leave the instrument in the calibration cup for more
than 30 minutes. This can cause condensation to form on the
sensing material, providing false low readings after calibration.
6. In the Comm Kit 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.