Cambridge Sensotec Rapidox 1100L Oxygen Analyser Instruction Manual
interest and read the corresponding X1 and Y1 values in the box.
9.10
Last data point
During data acquisition, the box labelled ‘Last data point’ will appear at the upper
middle of the graph window. It displays the most recent data values read from the
analyser.
9.11
Using the Cursor
Clicking and holding the left mouse button with the pointer over the ‘
C
’ at the top
of the plot area activates the cursor, which appears as a vertical dashed line on the
plot. While keeping the mouse button pressed, you can now move the pointer
anywhere in the plot area or on the ‘
C
’ in order to move the cursor. The box
labelled ‘Cursor’ to the upper right of the graph window will display actual values
for oxygen, temperature (or pressure), time and the data point number (n) at or
immediately to the left of the cursor position. The cursor can be used to
investigate actual data values at specific points of interest on the graph. The
cursor is not available during data acquisition, but is available if the run is
‘paused’.
9.12
Zooming
You can zoom in to any part of the oxygen plot by simply placing the mouse
pointer on the new graph start position and then clicking and dragging a new box
to re-size the graph. The label on the box to the upper left of the graph window
will change to ‘Zoom box co-ordinates’, and an extra set of co-ordinates, labelled
X2 and Y2, will appear, showing the co-ordinates in X and Y units of the second
corner of the zoom rectangle as you drag the mouse pointer. The plot will zoom
and auto-scale when you release the mouse button. This can be repeated if you
wish to zoom in even further. To zoom back to the original size select ‘Zoom Full’
from the View menu. Note that although you can use the zoom facility during a
live run, the graph will auto-scale to full size with each new data point.
9.13
Y-Axis Graph Units
You can toggle the Y1 oxygen units at any time from percent to ppm and vice
versa. Select ‘O2 Units’ from the ‘View’ menu and choose either ‘Percent’ or
‘ppm’. The current selection is then displayed in the top right box labelled ‘O2
Axis’.
9.14
Oxygen Scale
You can display the Y1 oxygen axis in linear or logarithmic format at any time by
selecting ‘O2 Scale’ from the view menu. The current selection is then displayed
Version 1.6
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Last printed 16/11/2011 16:59:00