Honeywell ACM 150 Manual To Installation, Operation, And Maintenance page 74

ACM 150
In Demand Scan the infrared spectrum is displayed, and it may be expanded for
viewing by touching the display. At the same time, the data and the spectrum are
archived automatically. The archived spectra may allow an application chemist
identify gases which were in the sampled area at the time but not actively monitored.
Trends and archives
Trend graphs
Trend Graphs are available for all of the active gases on every scanned point. The
data from each scan is stored for this purpose. Trend Graphs provide a means of
viewing a leak incident from start to finish.
Trend Graphs are available in the menu shown in
a starting hour and an ending hour. Only one date may be selected. The minimum
time interval is one hour and the maximum is 24 hours. Time entries use the 24-hour
clock. You can not enter minutes. Use the number keys to make the entries. Then,
press one of the scanned areas (green box) for trending.
Figure 42. Trend graph menu
Pressing the selected area changes the display by generating a trend graph.
43 shows a graph of four gases over a one day time period. In this case, there is a
constantly changing CO
To rescale the y-axis for a greater resolution enter a value in the empty field and
press "Rescale".
concentration shown in green color.
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Figure 42. You must enter a date,
Figure