Campbell Scientific LoggerNet Datalogger Support Software - Manual (Page 560)

Appendix F. Calibration and Zeroing
The following values of the mode variable give the status of the calibration:
0 No calibration has been performed since program start
2 Calibration in progress OR first stage of two-point calibration in progress
3 Waiting for second stage of two-point calibration to begin
5 Second stage of two-point calibration in progress
6 Calibration complete
–1 Calibration error
–2 Measurement range error
–3 Error with the value used as the Reps argument in the FieldCal instruction.
The following values of the mode variable are used to initiate a calibration
process:
1 Start the calibration, OR start the first point of a two point calibration
4 Start the second point of a two point calibration
For Zeroing and Offset calibration, a mode value of 4 is never
used. The entire calibration process is initiated with the mode
value being set to 1.
By properly changing the known value variables and the mode variables in a
calibrating program, a manual calibration can be performed on a sensor. Steps
for doing this are given below.
F.4.2 Using the Mode Variable for Manual Single-Point
Calibration
These steps demonstrate how to perform manual single-point calibrations
(Zeroing or Offset calibrations):
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 zeroing or offset condition.
3. Indicate the known offset value (if applicable) by changing the “known
value” variable to that value.
4. Set the mode variable to 1 to initiate the calibration process.
NOTE
F-6