Nitrox Information (O Information) - SubGear XP Air Gebrauchsanweisung

Diving with XP AIR
1.3 Nitrox information (O
For dives with compressed air in normal recreational diving, nitrogen is the decisive gas for the
decompression calculations. When diving with Nitrox, the risk of oxygen toxicity rises with the increase of the
fraction of oxygen and the increase of depth and can limit dive time and the maximum depth. XP AIR
includes this in the calculations and displays the necessary information:
O % mix Fraction of oxygen: The fraction of oxygen in the Nitrox mixture can be set between
2
21% (normal compressed air) and 100% in 1% increments. Your selected mix will be
the basis for all calculations.
ppO max Maximum allowed partial pressure of oxygen: the higher the fraction of oxygen in
2
the mixture, the shallower the dive depth at which this value of the partial pressure
of oxygen is reached. The depth at which ppO
Operating Depth (MOD). Default setting is 1.4 bar, but it can be set by means of Dive.
Log between 1.0 and 1.95 bar. When you enter the settings for the gas mixture, XP
AIR will display the ppO
the diver audibly and visually once the depth is reached at which the ppO
maximum allowed value.
F
• The partial pressure limit set by means of Dive.Log can be reduced manually at
XP AIR (->18, setting the gas mixture).
• The CNS O
Oxygen toxicity: With the increased percentage of oxygen, the oxygen in the tissues
CNs O %
2
(especially in the central nervous system (CNS)) becomes important. If the partial
pressure of oxygen rises above 0.5 bar, the CNS O
pressure of oxygen is below 0.5 bar, the CNS O
O
2
for three typical mixes
21%
32%
36%
Nitrox diving may only be attempted by experienced divers after proper training from an
internationally recognized agency.
16
information)
2
max. limit setting and the corresponding MOD. XP AIR warns
2
% value/alarm is not influenced by the selected ppO
2
value is to 100%, the closer the limit where symptoms can occur. See page 21.
Depth
at which ppO 2
reaches 0.5 bar
13m (43ft)
6m (20ft)
4m (13ft)
! WARNING
max. is reached is called Maximum
2
2
value decreases. The closer the CNS
2
ppO
0.21 bar
CNS O %
2
decreases
0.5 bar
CNS O %
2
increases
reaches the
2
max. setting.
2
value increases, if the partial
2