Aeris CompuMask, Operating Manual

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FO2 continues to reset to the FO2 50% DEFAULT after subsequent repetitive dives until 24
hours elapse after the last dive, or the FO2 50% DEFAULT is turned OFF.
When the FO2 50% DEFAULT is set OFF, FO2 for that series of repetitive dives will remain
set at the last FO2 Set Point selected.
The default FO2 for each new dive activation Period is AIR. When FO2 is set for AIR, the
calculations are the same as when it is set for 21%. When FO2 is set to AIR, it remains set
for AIR until it is set for a numerical value (21 to 50%).
When FO2 is set to AIR, the O2 Bar Graph is not displayed at any time during a dive or
on the surface. PO2 values and/or warnings will not be displayed during the dive.
FRE Dive nitrogen calculations are based on AIR and not affected by these FO2 Settings.
Maximum Operating Depths affected by the PO2 limit set will not be displayed when FO2
is set to AIR.
Internally, the CompuMask keeps track of the oxygen loading so that if FO2 is subse-
quently set for a numerical value, the oxygen loading for previous AIR dives will be ac-
counted for in the next Nitrox dive (during that dive period and series of repetitive dives).
Once FO2 is set for a numerical value (21 to 50%) and a dive is made, the AIR option is
disabled until 24 hours elapse after the last dive. The AIR option will not be displayed as
Set FO2 option until a full 24 hour Surface Interval has elapsed.