Thermo Scientific Scientific AquaSensors DataStick User Manual page 81

Initiate the zero calibration by clicking the CALIBRATE button.
Once the calibration has been initiated it will take approximately 1 to 2 minutes. During this period, the abort sequence
can be initiated as shown with the active Abort button.
When the point has been successfully calibrated, measured values will be based on the new zero. The rate of change in reading
from the old measured value to the new will be dependent on the sensor filter value that is entered in the configuration menu.
Exiting the calibration menu will return the user to the measure screen.
Thermo Scientific AquaSensors™ DataStick™ Measurement System User Guide 79