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3. Diving with Aladin 2G
3.1.3 Nitrox information
(O
information)
2
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 max depth.
Aladin 2G includes this in the calculations
and displays the necessary information:
O
% mix Fraction
2
fraction of oxygen in the Nitrox mixture can
be set between 21% (normal compressed
air) and 100% in 1% increments. Your
selected mix will be the basis for all
calculations.
ppO
max Maximum allowed partial
2
pressure of oxygen: the higher the
fraction of oxygen in the mixture, the
shallower the dive depth at which this value
of the partial pressure of oxygen is reached.
The depth at which ppO
called Maximum Operating Depth (MOD).
When you enter the settings for the gas
mixture, Aladin 2G will display the ppO
limit setting and the corresponding MOD.
Aladin 2G warns you audibly and visually
once the depth is reached at which the
ppO
reaches the maximum allowed value
2
->25.
)
NOTE:
• Default setting of ppO
The value of ppO
by means of SmartTRAK or with "set
1" between 1.2 and 1.6bar (->59). It
can also be changed at the time of
setting the gas mixture (->21).
• The CNS O
% value/alarm is not
2
influenced by the selected ppO
setting.
CNS O
% Oxygen toxicity: With the
2
increased percentage of oxygen, the
oxygen in the tissues, especially in the
central nervous system (CNS), becomes
important. If the partial pressure of oxygen
rises above 0.5bar, the CNS O
increases, if the partial pressure of oxygen is
below 0.5bar, the CNS O
The closer the CNS O
20
the closer the limit where symptoms of
oxygen toxicity can occur.
Depth
at which ppO
reaches 0.5bar
for three
commonly
used mixes
21% 13m (43ft)
32% 6m (20ft)
36% 4m (13ft)
of
oxygen:
The
Nitrox diving may only be attempted by
experienced divers after proper training from
an internationally recognized agency.
max is reached is
2
max
3.2
2
Aladin 2G draws the diver's attention to
certain situations and warns the diver
of unsafe diving practices. Attention
messages and alarms are visual and / or
audible.
max is 1.4bar.
2
)
max can be set
NOTE:
2
• The audible attention messages
can be switched off in "set 1" ->58 or
SmartTRAK. With SmartTRAK they
can be switched off selectively.
• In addition, the sound can be turned
max
2
off completely in "set 2" ->65.
If you turn off the sound you will have no
audible warnings. Without audible warnings
you could inadvertently get into potentially
hazardous situations which could result in
value
death or serious injury.
2
value decreases.
2
value is to 100%,
2
ppO
0.21bar
2
CNSO
%
2
decreases
0.5bar
CNSO
%
2
increases
WARNING
Attention messages and
alarms
WARNING
SCUBAPRO ALADIN 2G
2
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