Seemann XP5, Owner'S Manual, Page: 61 / 108

61
HIGH PO2 DIVE MODE
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, PO2
symbol, O2 segment of the O2 Bar Graph, and UP Arrow
will appear on the Main Display as a warning until PO2 de-
creases. Current Depth and Dive Time Remaining will also
be displayed (Fig. 57).
If PO2 continues to increase, the value displayed will in-
crease toward 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,
PO2 symbol, O2 segment of the O2 Bar Graph, and UP
Arrow will flash until PO2 decreases (Fig. 58).
WARNING: In the event that you enter High PO2
Dive Mode, you must immediately focus on re-
ducing the partial pressure of oxygen by
slowly ascending to a shallower depth at a
safe rate in accordance with your nitrox
training. If you continue the dive at your
current depth, or descend deeper, your expo-
sure to CNS oxygen toxicity will increase.
Fig. 57 - PO2 Warning
Fig. 58 - PO2 Alarm