Sensornet ORYX DTS, User Manual

Page: 67 / 101

Oryx DTS User Manual v4 Page 61
The user can also specify a single point in the fibre as a reference instead of a zone
or section. This may be more appropriate if independent measurements or the
PT100 probe is used to measure only a short section (<2m) of fibre.
Figure 42 - Slope calibration – reference sections
Click ‘Next’ to proceed to the next stage.
Temperature Offset Calibration
The temperature offset calibration is similar to the slope correction but now the
absolute temperature reading of the DTS is calibrated. As for the slope correction,
the user can choose between a ‘fixed value’ correction, or use a reference point or
section of fibre.
In Figure 43, reference section has been selected as the calibration method and the
offset reference has been selected as ‘Point’ (800m entered) with the temperature
source as ‘Fixed’, specifying the temperature at this point to be 25°C. The
temperature source can also be selected to use one of the measured PT100
probes.
NOTE: Only one reference section or point is required to set the offset calibration.