English
15
4 Functions during the dive
III UWATEC
®
Aladin
®
ONE
III
4.8 Oxygen toxicity (CNS O
2
%)
Aladin
®
ONE
calculates oxygen toxicity from depth values, time and the gas
mixture and displays it in the lower right corner. 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.
The symbol "CNS O
2
" flashes if oxygen toxicity
reaches 75%.
Ascend to shallower depth to decrease oxygen
loading and consider terminating the dive.
When oxygen toxicity reaches 100%, "CNS O
2
"
and the percentage value flash.
Danger of oxygen toxicity!
Start procedure for terminating the dive.
• 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
®
ONE
will display CNS O
2
% values exceeding 199 % with 199 %.
CNS O
2
%
DEPTH
NO STOP
DIVE TIME
CNS O
2
%
DEPTH
NO STOP
DIVE TIME
CNS O
2
%
DEPTH
NO STOP
DIVE TIME
WARNING
WARNING
Oxygen toxicity
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
(1.4 bar) determines the Maxi-
mum Operating Depth (MOD). Diving deeper than the MOD will expose the
diver to oxygen partial pressures higher than the set maximum level.
The MOD is a function of ppO
2 max
and the mixture
used. If during the dive the MOD is reached or
exceeded Aladin
®
ONE
displays the MOD (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
NO STOP
DIVE TIME
WARNING
WARNING
