51
English
A1 USER MANUAL
Against long exposure effects:
The A1
“tracks” the exposure by means of the
CNS O
2
clock. At levels of 100% and higher
there is risk of long exposure effects, and
consequently the A1 will activate an alarm
when this level of CNS O
2
is reached. The
A1 can also warn you when the CNS O
2
level reaches 75%. Note that the CNS
O
2
clock is independent of the value of
ppO
2
max set by the user. CNS O
2
75%
warning and CNS O
2
100% alarm can
be activate during a dive (see chapters
4.4.7 CNS O
2
warning (over 75%)
and
4.4.8 CNS O
2
alarm (100%)
for more
information), whereas the remaining CNS
O
2
value after a dive is shown in the “ready
to dive” display in the left side of the bottom
row (in the below display this is 56%).
The CNS O
2
clock increases when the
oxygen partial pressure is higher than
0.5bar, and decreases when the oxygen
partial pressure is lower than 0.5bar.
Hence, while on the surface breathing air
you will always be decreasing the CNS O
2
clock. During the dive, the depth at which
0.5bar is reached for various mixes is as
follows:
Air: 13m/43ft
32% O
2
: 6m/20ft
36% O
2
: 4m/13ft
F
NOTE: For oxygen concentrations of
80% and higher, the ppO
2
max is fixed
at 1.6bar and cannot be changed.
Against long exposure and repetitive
dives:
Repetitive diving and very long
exposures (technical and rebreather
diving) with high ppO
2
may cause long
term pulmonary toxicity effects that can
be tracked with OTUs. If you exceed your
OTUs for the dive, a warning will be shown.
4.11 Diving in GAUGE mode
When the A1 is set to GAUGE mode,
it will only monitor depth, time, and
temperature, and will not carry out any
decompression calculations. You can only
switch to GAUGE mode if the computer
is completely desaturated. All audible and
visual warnings and alarms, other than the
low battery, max depth and max dive time,
are turned off.
WARNING
Dives in GAUGE mode are performed at your
own risk. After a dive in GAUGE mode you must
wait at least 48 hours before diving using a
decompression computer.
When on the surface in GAUGE mode,
the A1 will show neither the remaining
desaturation time nor the CNS O
2
% value.
It will, however, display a surface interval up
to 48 hours and a 48-hour no-fly time. This
no-fly time is also the time during which you
cannot change the dive mode.
The GAUGE mode surface display after a
dive shows the dive time in the top row.
In the middle row the timer is running
from the dive start or last manual restart.
In the bottom row the water temperature
is shown. After a 5-minute timeout the
display changes to GAUGE mode ready to
dive menu.
During a dive in GAUGE mode, the A1
displays depth and dive time at the top row,
a timer in the middle and water temperature
Summary of Contents for Aladin A1
Page 1: ...Aladin A1 User Manual ...
Page 2: ...2 A1 USER MANUAL ...
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