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ABB LGR-ICOS™ GLA232 Series Methane/Ethane Analyzer User Manual
Spectrum Display
Click the Display button on the User Interface Control Bar to switch to the 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 analyzer is a dual-laser system. The drop-down selector in the lower right portion of the
Spectrum Display lets you toggle between the two lasers:
Laser 1 (also referred to as laser A) displays CH
Laser 2 (also referred to as laser B) displays primarily H
Figure 12).
The measured concentrations are shown in ppm at the bottom of the Spectrum Display.
ABB PROPRIETARY INFORMATION
Figure 10: Alarm Status Display
4
and H
O peaks (see Figure 11).
2
O, but is also used for C
2
H
(see
2
6
25
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