Thermo Scientific AquaSensors™ DataStick™ Measurement System User Guide
64
ASCII Command to Initiate a Zero Calibration
Function
Command
Explanation
Zero Calibration
CALSZERO
Initiates a zero calibration of toroidal sensor
All Calibration Commands will respond with “OK” if accepted and “ERROR” if not accepted
The status of the calibration can be reviewed with the CALSTATUS command. When the last number returned is a 1,
the calibration is progressing. When the last number returned is a 2, the calibration has been successful. Any other number
indicates a specific failure mode (see appendix).
4 . 3 . 3 . 2
O N E - P O I N T S A M P L E C A L I B R A T I O N
Select 1-POINT SAMPLE from the calibration menu to begin a contacting conductivity span calibration.
When the 1-point sample method is chosen, the status box will prompt the user to enter the desired calibration value.
This calibration should be initiated when the sensor is in a liquid that is at the high end of the expected measuring range.
Stable temperature and sensor readings will also help to establish an accurate calibration.
Once the desired value for calibration is entered, the CALIBRATE button becomes active. Once the displayed sensor and
temperature values are stable and near expected values, click the CALIBRATE button to initiate the calibration or click EXIT
to return to the main measure screen.
Once the calibration has been initiated it will take between 30 seconds and 2 minutes depending on sensor and temperature
measurement stability. During this period, the abort sequence can be initiated as shown with the active ABORT button.
