Operation Manual

59
4 Functions during the Dive
III Uwatec
®
Aladin
®
Air Z O
2
English
III
4.5 Partial pressure of oxygen (ppO2)
The tolerable partial pressure of oxygen can be set by means of a MemoMouse
and the DataTalk software to between 1.2 and 1.95 bar (see page 88). The set
value is not displayed.
The actual ppO
2
is displayed only if an Oxy2 is used.
Messages: Depending on the setting for the ppO
2
limit and the mixture
used the ppO
2
limit will be reached at different depths. When
this is reached the Aladin
®
Air Z O
2
sends an acoustic attention
message and the current depth display starts flashing the ascend
arrow and the O
2
-warning-triangle appears.
Response: Ascend to a shallower depth in order to diminish the danger of
oxygen toxicity.
The allowed maximum depth should not be exceeded or only for a short
period. Disregarding the warning can lead to danger from oxygen toxicity.
4.6 Oxygen toxicity (CNS O
2
%)
Oxygen toxicity is calculated on line as a function of depth and workload values
and the gas mixture. The toxicity is displayed in 5% increments as a percentage
of the maximum value tolerated (O
2
clock), together with the symbol <CNS O
2
LIMIT>. This display is in the same place as the ascent rate display. The Aladin
®
Air Z O
2
takes into consideration that the physical performance of a diver influ-
ences oxygen toxicity.
NO STOP
S
L
O
W
depth dive time
max. depth deco info
O
2 2
% MIX% MIX
4 sec
tank data
bar
O
2
%
S
L
O
W
depth dive time
max. depth deco info
O
2
% MIX
%
NO STOP
CNS O
2
LIMIT