6.2 Graph Menu
Pressing changes the display into a graphical mode in which a trend curve of the log
values (Y-axis) is shown on a time scale (X-axis).
The actual oxygen value in percent is displayed in the upper right corner of the graph
screen as Current.
The trend curve displays the log values from the SD card. The trend screen has 108 dots
in the timeline. Therefore, the trend curve will show 1 log value per dot if the X timing is
set to 18 minutes (6 log values/minute x 18 minutes = 108 values). If the X timing is less
than 18 minutes, the trend curve will be shown as a dotted line.
If the X timing is 36 minutes, two values will be printed at the same X-position. Similar-
ly, if the X-timing is 180 minutes, 10 values will be printed at the same X-position with
all different Y values.
Pressing gives access to the History time menu, where you can choose to see the
trend curve in a specific historical period and change the setting for the trend curve.
During back-flushing, the Current status is changed to bFrozen with the oxygen value
measured before the backflushing.
During auto calibration, the Current status is changed to cFrozen with the oxygen
value measured before the calibration.
History time & Graph settings
To see the trend curve in a specific historical period, it is possible to change the values in
Date & Time. If for example it is now 12:28 and you want to see the trend curve at 11:00
you have to go through the following steps:
• First, select Time and enter the historical point of time.
• Then, select Locate history point, and the screen will show to the trend curve at that
specific time.
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