Siemens SITRANS T Series Operating Instructions Manual page 20

Operating
5.3 Viewing the spectrum of the channel (Spectral View)
A temperature range is assigned to each sensor. The blue vertical line indicates the defined
minimum temperature. The red vertical line indicates the defined maximum temperature.
Each FBG peak that lies within the defined temperature range and the threshold value is
marked in the diagram, e.g. S1.
The Absolute Threshold indicates the minimum value in dBm that an FBG peak must exceed
in order to be accepted as a reflection. Absolute Threshold should be less than -20 dBm.
The Channel Threshold indicates the minimum value in dB that the highest FBG peak must
exceed in a temperature range in order to be accepted as a peak. The default value is 5 dB.
Figure 5-2
Figure 5-3
20
Parameter assignment software: Tab: Spectral View
Parameter assignment software: Tab: Spectral View: All FBG peaks are in the defined
temperature range
Operating Instructions, 04/2017, A5E39322264-AC
SITRANS TO500