In-Situ Communication Device Kit for the Aqua TROLL 400 and RDO PRO Probe - Manual (Page 12)

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7. Select the appropriate calibration standard from the drop-down list. If you select
“User Defined,” enter the value of the solution.
Note: If you select 20° C as the reference temperature, you must
also select “User defined” and enter the value of the your
calibration standard.
8. Click Next.
9. Place the instrument into the calibration cup and allow time for the temperature to
stabilize.
10. Gently tap the sides of the calibration cup against the palm of your hand to remove
any bubbles in the conductivity cell. Visually inspect to ensure that all bubbles are
removed.
11. Click OK to start the calibration.
12. 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.
13. You can save or print the calibration report.
14. Click OK to complete the calibration.
15. Once calibration is complete, remove the instrument from the calibration cup and
rinse both thoroughly with clean water.
Pressure/Level
The pressure sensor has been factory calibrated with NIST standards to a greater
degree of accuracy than can be achieved in nearly any alternative setting. Therefore,
user calibration is not necessary for the pressure sensor.