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U AV - M I C R O P O R TA B L E A N A LY Z E R S | G L A 1 3 3 S E R I E S | U M/G L A 1 3 3 - E N R E V. B
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User Interface Operation
Display
In the Control Bar, the Display button (see Figure 21) lets you
select the desired screen:
• Numeric (Figure 22)
• Spectrum (Figure 23)
• Timechart (Figure 24 and Figure 25)
• Alarm Status (Figure 26)
Numeric Display
The Numeric display is the default display and one of the
simplest screens for go/no-go decisions based strictly on
gas concentration measurements . Sample gas is measured
in parts per million (ppm) . The resolution unit auto-adjusts .
Figure 22 shows an example of numeric readout of the last
measurements of CH₄, H₂O, CO₂, CH₄ (Dry), and CO₂ (Dry) in
parts per million (ppm) . The displayed numeric readout may
vary, depending on the analyzer type . In addition, the analyzer
color-coded operational status is indicated (for details on
color-coding, refer to Alarm Status Display - Figure 26) .
Figure 22 Numeric Display Screen
Spectrum Display
The sample Spectrum display provides additional information
on the measured gas: the analyzer sensitivity level shown
in the Transmitted Intensity diagram, the absorption level,
a theoretical fit to the measured target gas(es), and the
ringdown time which is indicative of whether or not the high-
reflectivity mirrors require cleaning .
The Spectrum screen displays peaks related to different gases .
The measured concentrations are shown in ppm on the bottom
of the Spectrum display . (Figure 23)
Figure 23 Spectrum Display Screen
The transmitted intensity also provides important information
about the analyzer measurement module light source . A drop
in intensity may indicate an issue with the laser, detector, OA-
ICOS module mirrors, or supporting electronics board . This
information is helpful when contacting ABB service about the
issue .
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