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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 cal-
culations and 21% O2 (79% nitrogen) for nitrogen calculations.
WARNING: If you surface for greater than 10 min-
utes during a dive, a subsequent 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 re-
mains the same (Fig. 12) until the set point is manually changed.
WARNING: Even if the Default is set OFF, the FO2
set point should be 'verified' to match the FO2 in
the nitrox mix being used before each nitrox dive.
Fig. 11 - FO2 Default ON
Fig. 12 - FO2 Default OFF
