Operation Manual

HIGH PO2

As Depth increases during a dive, the partial pressure of oxygen

(PO2) increases. When PO2 becomes equal to, or greater than,

1.40 ATA, or 0.2 ATA less than the PO2 Alarm Set Point (a

user setting), the Audible Alarm will sound (unless set OFF), and

the current PO2 value, graphic PO2, O2 segment of the O2 Bar

Graph, and UP Arrow will appear on the Main Display as a warn-

ing until PO2 decreases. Current Depth and Dive Time Remaining

will also be displayed (Fig. 61).

If PO2 continues to increase, the value displayed will increase to-

ward a maximum value of 5.00 ATA in increments of .01 ATA.

When it reaches a value of 1.60 ATA, or the PO2 Alarm Set

Point (a user setting), the Audible Alarm will sound (unless set

OFF) and the current PO2 value, graphic PO2, O2 segment of the

O2 Bar Graph, and UP Arrow will flash as a warning until PO2 de-

creases (Fig. 62).

WARNING: In the event that you enter High PO2

Dive Mode, you must immediately focus on reduc-

ing the partial pressure of oxygen by slowly As-

cending to a shallower depth at a safe rate in ac-

cordance with your nitrox training. If you continue

the dive at your current depth, or descend deeper,

your exposure to CNS oxygen toxicity will in-

crease.

Fig. 61 - High PO2 Warning

Fig. 62 - High PO2 Alarm

Flashing