Operating Manual
3KXG165002R4201_2021_04
ABB PROPRIETARY INFORMATION 22
GLA531 Series LGR-ICOS™ Gas Analyzer
Spectrum Display
The spectrum display in Figure 17 provides additional information on the reliability of the spectroscopy
measurements:
• Laser signal strength defined as transmitted intensity level on the Detector Voltage chart (top)
• Detected light absorptions of the targeted gases shown as small dips on the Detector Voltage chart
• Absorbance signal intensity of the targeted gases shown as peaks on the Absorbance chart (bottom)
• Laser frequency linelock at the center of each absorbance window
Figure 17 Spectrum Display
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