Oceanic Pro Plus - OXYGEN EXPOSURE; PARTIAL PRESSURE OF OXYGEN; HIGH PO2 DIVE MODE

63
Datamax Pro Plus
OXYGEN EXPOSURE
The Pro Plus is a sophisticated instrument designed with capabilities that go
beyond the range of recreational diving with compressed air. It will help you
to avoid and manage excessive oxygen exposure.
PARTIAL PRESSURE OF OXYGEN
As depth increases during the dive, the partial pressure of oxygen (PO2) in-
creases. To view the current value of PO2 (Fig. 73a):
• press the Advance (Left) button 1 time to access the Secondary Display.
HIGH PO2 DIVE MODE
The Pro Plus enters the High PO2 Dive Mode when partial pressure of oxygen
becomes equal to, or greater than, 1.40 ATA. The current PO2 value and the
symbol 'PO2' will appear and remain on display (Fig. 74) until PO2 decreases
below a value of 1.40 ATA. If the Alternate Display is set to ON, they replace
Max Depth and Elapsed Dive Time. A double beep will sound to alert you.
If partial pressure of oxygen continues to increase, the value of PO2 displayed
will increase from 1.40 toward a maximum value of 5.00 ATA in increments of
'.01' ATA.
Fig. 73 - Current PO2
Fig. 74 - High PO2
(=/> 1.40 ATA)
200 5 10 30 40 50 60
NO DECO
C Z
DECO
C Z O
2
PSI
200 5 10 30 40 50 60
NO DECO
C Z
DECO
C Z O
2
PSI
FT
a