Campbell Scientific TGA100 Trace Gas Analyzer Manual - Manual (Page 29)

3.4.1 Screen Layout
The real time graphics screen is presented in . In the upper left corner is a box which displays the TGA
software version, the laser and detector temperatures, and the time. Beneath the time and temperature display is a blank
area used for information and error message display. The rest of the top of the screen has five menu columns: run mode,
dynamic parameters, detector video, special function enable/disable, and graph selections.
Figure 3-2
Figure 3-2. Example Real Time Screen
In the middle of the screen are graph 1 and graph 2, used to display certain user-selectable variables. The horizontal
time step is 0.1 sec and the horizontal width is 280 pixels or 28 seconds. The title bar at the top of each window shows
the variable name, the floating point value and its standard deviation, and the units. The maximum and minimum
display limits are shown in the upper right and lower right corners.
Graph 3 is located at the bottom-center of the screen, and is used to display user-selected variables. The graph 3
window is 150 pixels wide or 15 seconds. Graph 3 also has the variable name, value, standard deviation, and display
limits noted on the graph.
At the bottom left corner of the screen are two high speed graphic windows that show the raw reference (REF) detector
signal and the raw sample (SMP) detector signal, scaled to match the analog-to-digital converter (ADC) input range.
At the bottom right corner of the screen are two more high speed graphic windows that display processed reference and
sample signals. The user may select the type of data to display in these windows using the Detector Video menu or the
Quick Keys. The number displayed at the top of these windows is either the transmittance or the absorbance of the
center of the spectral scan, depending on the display mode selected. All four of the high-speed graphic windows have
three vertical dashed lines. These lines show the center of the spectral scan and the range of data actually used to
calculate concentration.
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