ALADIN ALADIN PRIME, Operating Manual, Page: 23 / 48

English
23
4 Functions during the dive
III UWATEC ® Aladin ® dive computers
III
4.8 Oxygen toxicity (CNS O
2
%)
Aladin ® calculates oxygen toxicity from depth values, time and the gas mixture
and displays it in the location of the ascent rate. The toxicity is expressed in 1%
increments of a maximum tolerated value (O
2
clock).
The symbol <CNS O
2
> is displayed together with the percentage.
An audible attention signal goes off if oxygen toxi-
city reaches 75%. The symbol <CNS O
2
> flashes.
Ascend to shallower depth to decrease oxygen
loading and consider terminating the dive.
When oxygen toxicity reaches 100%, an audible
alarm goes off every 4 seconds. <CNS O
2
> and the
percentage value flash. Danger of oxygen toxicity!
Start procedure for terminating the dive.
• During an ascent and if the CNS O
2
% value does not increase anymore (due to
a lower partial pressure of oxygen), the audible warning is suppressed.
• During the ascent, the display of the oxygen toxicity is replaced by the ascent
rate. If the ascent is stopped, the display changes back to the indication of the
CNS value.
• Aladin ® will display CNS O
2
% values exceeding 199 % with 199 %.
CNS O
2
%
DEPTH
NO STOP
DIVE TIME
CNS O
2
%
DEPTH DEPTH
NO ST NO STOP OP
DIVE DIVE TIME TIME
4 sec
S
L
O
W
CNS O
2
%
DEPTH DEPTH
NO ST NO STOP OP
DIVE DIVE TIME TIME
WARNING
WARNING
Oxygen toxicity
>Temp., O
2
>Temp. , Time
,
O
2
Max. Operating Depth MOD
4.7 Partial pressure of oxygen (ppO
2 max
) / Maximum Operating Depth (MOD)
The maximum partial pressure of oxygen ppO
2 max
(default 1.4 bar) determines
the Maximum Operating Depth (MOD). Diving deeper than the MOD will expo-
se the diver to oxygen partial pressures higher than the set maximum level.
TEC
The ppO
2 max
and consequently the MOD can be reduced manually (->18,
setting the gas mixture, point 5).
TEC
In addition the maximum allowed ppO
2
can be set by means of SmartTRAK
or with "set 1" between 1.2 to 1.6 bar ->40.
The MOD is a function of ppO
2 max
and the mixtu-
re used. If during the dive the MOD is reached or
exceeded Aladin
® sends an audible attention
message and the MOD is displayed (flashing) in the
lower left corner.
Ascend to a depth shallower than the displayed
MOD in order to diminish the danger of oxygen
poisoning.
The MOD should not be exceeded. Disregarding the warning can lead to
oxygen poisoning.
CNS O
2
%
DEPTH DEPTH
NO ST NO STOP OP
DIVE DIVE TIME TIME
4 sec
WARNING
>Temp. , O
2
>Temp. , Time
>MOD
WARNING