Section 5 - Operation
Monitoring System
Understanding
the Trend
Display
The trend display is in the form of a line graph, representing the
historical variations of the trended measurement. The line travels from
left to right across the graph as new trend data accumulates.
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0
12:20 13:20
PERCENT OXYGEN
OP20019
The name of the selected trend variable appears above the trend graph’s
vertical axis (PERCENT OXYGEN, above). The scale of the vertical axis
is fixed. The horizontal axis displays the most recent one-hour time
period (12:20–13:20, above), divided into ten-minute increments. Time
measurements are shown in 24-hour format.
Since the NARKOMED 2B starts trending available data on power-up, it
rounds off the time scale labeling to the previous ten-minute increment
for ease of reading. For example, if the NARKOMED 2B is powered-up
and begins monitoring at 12:23, the left-most time mark will be 12:20.
NOTE: The gap preceding the start of the trend line (12:20–12:23,
above) indicates that no data was recorded during that
time interval.
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