18
WARNING: The percentage of oxygen (FO2) in
the nitrox mix being used must be set 'before
each' nitrox dive, unless the FO2 50% Default
feature has been turned OFF.
FO2 50% Default
If the Default is set to ON and FO2 is set to a value
'greater than 21%', the FO2 set point value will
automatically revert to 50% 10 minutes after that dive (Fig.
11). The Maximum Depth that can be achieved with a PO2
of 1.60 ATA will also be displayed.
• FO2 must therefore be reset for each repetitive nitrox
dive, or the value will automatically 'default' to 50(%) and
the dives will be calculated based on 50% O2 (50%
nitrogen) for oxygen calculations and 21% O2 (79% ni-
trogen) for nitrogen calculations.
WARNING: If you surface for greater than 10
minutes during a dive, a new descent will be
considered a new dive and FO2 must be reset.
If the Default is set to OFF, the FO2 value for repetitive
dives remains the same (Fig. 12) until setting is changed.
WARNING: Even if the Default is set to OFF, the
FO2 set point should be 'verified' before each
nitrox dive.
Fig. 11 - FO2 Default ON
Fig. 12 - FO2 Default OFF
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