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3.11.3.1 Closed-circuit gases
On a rebreather dive, you need at minimum two closed-circuit
gases: one is your pure oxygen tank, and the other is a diluent.
The correct oxygen and helium percentages of the diluent gas(es) in
your diluent cylinder(s) must always be entered into the dive
computer (or through DM5) to ensure correct tissue and oxygen
calculation. Diluent gas(es) used on a rebreather dive are found
under CC gases in the main menu.
To modify diluent gases
1.
While in CCR mode, keep [DOWN] pressed to enter settings.
2.
Press [SELECT] to enter CC Gases settings.
3.
DILUENT 1 is displayed and is always on (cannot be turned off).
4. Press [SELECT] to move to the oxygen setting.
5. Adjust oxygen percentage with [DOWN] or [UP] and confirm
with [SELECT].
6. Continue with adjusting helium percentage and PO
2
value.
7. After pressing [SELECT] to confirm the PO
2
value, press [UP] to
move to the next diluent.
8. Repeat steps 4 and 5 for each diluent.
9. Press [MODE] to exit.
3.11.3.2 Open-circuit gases
As with closed-circuit gases, you must alway define the correct
oxygen and helium percentages of open-circuit gases (bailout gases)
to ensure correct tissue and oxygen calculation.
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