F-900 Instruction Manual rev. 1/16/2014
1554 NE 3
rd
Ave, Camas, WA 98607, USA Phone (360) 833-8835 Fax (360) 833-1914
[email protected] http://www.felixinstruments.com
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Graph View
Graph View will be entered automatically when the unit has stabilized in Sensor Stability mode. Or
to enter Graph View, press the RIGHT arrow when the F-900 is in Sensor Stability Mode. This view
graphically displays the measured C
2
H
4
value over time. To exit Graph View and move into Monitor
Mode, press the right arrow.
Figure 10: Display shot of Graph View with additional labels.
The top line of the display indicates the current ethylene value. Below that is the dynamic range
(here it is 1.000 ppm). The y-axis scale is set by the highest value shown in the buffer. This range
will scale vertically, dependent on the highest concentration of ethylene measured. If the
concentration is small, the dynamic range will reflect this. For example, the initial value was 0.162
ppm and there is a sudden peak to 7.578 ppm. As the spike or peak occurs, the graph will scale to
10.000 ppm. If the sample returns to 0.168 ppm, the scale will remain at 10.000ppm until the graph
and the buffer are cleared.
The scale of the graph can be increased or decreased by using the up and down keys. Pressing the
up arrow will zoom in on the data, minimizing the visible range. Using the down key will increase
