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ATOM 3.0 OPERATING MANUAL
© 2002 Design, 2011 Doc. No. 12-5216-r02 (9/6/11)
SET F GROUP (FO2), NORM only
Selections >> FO2 Gas 1 > FO2 Gas 2 > FO2 Gas 3 > FO2 50% Default.
> FO2 settings revert to AIR 24 hours after a dive.
> The FO2 50% Default remains as set until changed.
FO2 50% Default:
> When set ON and FO2 Gas 1 is set for a numerical value, 10 minutes on the surface after that dive FO2 Gas 1 is
displayed as 50% and further dives are calculated based on 50% O2 for oxygen calculations and 21% O2 for nitrogen
calculations (79% Nitrogen) unless FO2 Gas 1 is set before the dive.
> FO2 Gas 1 continues to reset to the 50% Default after subsequent repetitive dives until 24 hours elapse after the last dive, or
the Default is set OFF.
> When set OFF, FO2 Gas 1 remains at the last Set Point for that period of activation.
> If set OFF, the FO2 for all gases remain at their respective Set Points until changed.
> If set ON, the FO2 for all gases default to 50%.
FO2 Gas 1 set for AIR:
> FO2 for Gas 1 each new dive period will be AIR, and calculations will be the same as when it is set for 21% O2.
> It remains set for AIR until it is set for a numerical value (21 to 100%).
> O2% and PO2 values and/or warnings are not displayed, on surface or during dive.
> Max operating depths affected by the PO2 limit set are not displayed in Plan.
> The unit keeps track of the O2 loading so that if FO2 Gas 1 is subsequently set for a numerical value, the O2 accumulated
during previous AIR dives will be accounted for in the next Nitrox dive (during that dive period and series of repetitive
dives).
FO2 set for Nitrox:
> When FO2 for any Gas is set for a numerical value (21 to 100%), the dive is considered Nitrox with the NX icon displayed
on all applicable screens.
> Once FO2 for Gas 1 is set for a numerical value (21 to 100%), the AIR option for all gases is disabled until 24 hours elapse
after the last dive.
> The AIR option is not be displayed in Set FO2 until a full 24 hour Surface Interval has elapsed.
Set F Lead-in, information includes (Fig. 46):
> Graphics Goto and SET F.
• A (< 2 sec) - to step forward to SET A.
• M (< 2 sec) - to step back to LOG.
• S (< 2 sec) - to access Set FO2 Gas 1.
Set FO2 Gas 1 (2, 3 similar), information includes (Fig. 47):
> Graphic SEt.
> Graphic AIR flashing (Fig. 47A), with Gas (tank) 1 (or 2 or 3) and FO2 icons.
- - or - -
> Max Depth allowed with MAX and FT (or M) icons.
> PO2 Alarm value set (ATA) with PO2 icon.
> FO2 value flashing (Fig. 47B), with NX, Gas (tank) 1 (or 2 or 3) and FO2 icons.
• A (hold) - to scroll upward through the Set Points from Air to 21 through 100% (8/sec) in 1% increments. The scroll stops
when the button is released, or at 32, 50, and 80% (even if A is held depressed).
• A (hold) again - to restate the scroll, then stop at Air (or 21).
• A (< 2 sec) - to step upward through Set Points.
• M (< 2 sec) - to step back through Set Points.
• S (< 2 sec) - to save the setting and access the next Set FO2 selection.
• S (2 sec), if the Set Point is not changed - to step back to the Lead-in screen or the previous set selection.
Set FO2 50% Default, information includes (Fig. 48):
> Graphics SEt, DFLT, and 50 with FO2 icon, solid.
> Set Point graphic OFF (or ON), flashing.
• A or M (< 2 sec) - to toggle between ON and OFF.
• S (< 2 sec) - to save the setting and revert to Set F Lead-in.
• S (2 sec), if the Set Point is not changed - to step back to Set FO2 Gas 3.
Fig. 46 - SET F LEAD-IN
Fig. 47A - SET FO2 GAS 1
(for Air)
Fig. 47B - SET FO2 GAS 2
(for Nitrox)
Fig. 48 - SET FO2 DEFAULT