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68
5 Functions at the Surface
III Uwatec
®
Aladin
®
Air Z O
2
5.2 Desaturation time
When <DESATURATION> appears, the Aladin
®
Air Z O
2
is in surface-mode.
Desaturation time in hours and minutes, the set mixture (percentage of oxygen)
and, if available, oxygen toxicity is displayed next to it. Desaturation time is
continually indicated until the next dive or until it reaches zero. The display is
switched off to save energy three minutes after the last manipulation is made
(surface-sleep-mode).
– In some cases, desaturation times with the Aladin
®
Air Z O
2
are considerably
longer than those of other dive computers. This is because the calculation
model assumes reduced physical activity at the surface (therefore less nitrogen
off gassing) and uses longer half-times.
– If desaturation time reaches zero, the “tissue“ models of the Aladin
®
Air Z O
2
are desaturated and it switches into the sleep-mode.
– Desaturation time is determined either by oxygen or nitrogen saturation,
depending on which gas requires the longer desaturation time.
Oxygen saturation (<CNS O
2
LIMIT>) is displayed and adjusted until the value
becomes 0%.
– For the calculations of the desaturation and No Fly Time it is assumed that the
diver inhales air.
5.3 No fly time
The waiting period until the next flight is indicated as follows: <DO NOT FLY>.
Beside this the time in hours that should pass before a flight is displayed.
In some cases the no fly time is considerably longer than with certain other
models (because of recalibrated desaturation time).
h
h
DO NOT FLY
DESATURATION
depth
dive time
max. depth
deco info
%
O
2
2
% MIX
% MIX
CNS O
2
LIMIT
h
h
DO NOT FLY
DESATURATION
depth
dive time
max. depth
deco info
%
CNS O
2
LIMIT
O
2
2
% MIX
% MIX