Campbell Scientific LoggerNet Datalogger Support Software - Manual (Page 561)

Appendix F. Calibration and Zeroing
5. Note that the datalogger automatically sets the mode variable to 2 during
the calibration process.
6. Note that the mode variable is set to 6 automatically by the datalogger
when the calibration process completes.
F.4.3 Using the Mode Variable for Manual Two-Point Calibration
These steps demonstrate how to perform manual two-point calibrations
(Multiplier/Offset or Multiplier Only):
1. Ensure the status (value of the mode variable) is 0 or 6 before you start.
a. A number greater than 0 that is not 6 indicates that a calibration is in
progress or that the last calibration did not complete properly.
b. A number less than 0 indicates that the calibration process
encountered an error. Resolve the error before proceeding with the
calibration then set the mode value to zero for a fresh start.
2. Place the sensor into the first known point condition.
3. Indicate the known value of the first point by changing the “known value”
variable to that value.
4. Set the mode variable to 1 to initiate the first part of the calibration
process.
5. Note that the datalogger automatically sets the mode variable to 2 during
the first point calibration process.
6. Note that the mode variable is automatically set to 3 when the first point is
completed.
a. The datalogger is waiting for the user to place the system into the
second point condition.
7. Place the sensor into the second known point condition.
8. Indicate the known value of the second point by changing the “known
value” variable to that value.
9. Set the mode variable to 4 to initiate the second part of the calibration.
10. Note that the datalogger sets the mode variable to 5 during the second
point calibration process.
11. Note that the mode variable is set to 6 by the datalogger when the
calibration process completes successfully.
F-7