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USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
Spectrum Display
Click the Display button on the User Interface Control Bar to switch to Spectrum Display .
The top plot shows the voltage from the photo-detector as the laser scans across the
absorption features.
The bottom plot shows the corresponding optical absorption displayed as black circles,
and the peak fit resulting from signal analysis as a blue line.
The measured concentrations are shown in parts per million (PPM) and ‰ (PP_MIL) on the
bottom of the Spectrum Display .
Figure 25 shows the Numeric Display with 100ppm CH
in air.
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Figure 25: Spectrum Display (100ppm CH
in air)
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