49
English
SCUBAPRO ALADIN 2G
8. Diving with two gas mixtures
(bottom mix) according to the instruc-
tions on page 21 (points 1-6).
2. Repeat the process in the Gas d O
2
menu to set the oxygen fraction and
ppO
2
max for gas d. Note that in this
case the resulting MOD corresponds to
the depth at which you plan to switch
from gas 1 to gas d during the ascent
phase (switch depth).
3. If you set gas d to “– – O
2
%”, Aladin 2G
will compute the dive considering gas 1
only.
Aladin 2G will only accept a gas switch
depth (MOD gas d) as input where the
maximum partial pressure of oxygen
(ppO
2
max), as pre-set manually (->21 point
5) or by means of SmartTRAK, is not
exceeded.
)
NOTE:
• During the ascent an audible and
visual attention message will indicate
that you have reached the depth
which requires the change to gas d
->52.
• Without confirmation with
the
display will disappear after 3 minutes
and your entries will not be accepted.
• If the deco gas option is turned on
and the oxygen fraction of gas d is
set to a value other than “--O
2
%”, in
surface mode and up to a depth of
0.8m Aladin 2G will display “2G” in
the lower right corner of the display
instead of a percentage value.
)
NOTE:
• The time to reset the O
2
% mix to air
can be set with SmartTRAK between
1 hour and 48 hours or to “no reset”
(default).
After the reset, the oxygen fraction of
gas 1 is set to 21% and gas d is set
to “– – O
2
%” (single gas dive).
Switching between single-gas and
two-gas diving
If gas d is not going to be used during the
next dive you can either set it to “– – O
2
%”
(->48, point 2) or you can turn off the deco
gas option in SET 1. When you turn off the
deco gas option in SET 1, the setting in
the Gas d O
2
menu remains but Aladin 2G
calculates the dive using gas 1 only.
If the deco gas option is turned off, the
GAS d O
2
menu will display OFF in the
lower left corner (instead of an MOD) and
the ppO
2
setting will not appear.
Functions during a dive with two gas
mixtures
WARNING
Diving with more than one gas mixture
represents a much higher risk than diving with
a single mixture, and mistakes by the diver
may lead to serious injury or death.
During dives with several gas mixtures,
always make sure you are breathing from the
tank you intended to breath from. Mark all
your tanks and regulators, so they can under
no circumstances be mixed up! Before every
dive and after changing a tank, make sure that
each gas mixture is set to the correct value for
the corresponding tank.
Predictive decompression prognosis
The calculation of decompression data is
based on the assumption that the change
of gas mixture will be performed at the
previously selected switch depth (MOD
gas
d). If a diver ignores the required
change or changes the mixture belatedly,
Aladin 2G will readjust the decompression
calculation accordingly. In case of an
ignored switch the dive computer will then
base its calculations on the assumption
that the diver will ascend to the surface
with gas 1.
Alternate displays during a dive
with two gases
)
NOTE:
All displays time out after 5 seconds
and the default display is shown again.
(Only exception is the temperature,
screen 2 below.)
Summary of Contents for Aladin 2G
Page 1: ... Aladin 2G ...
Page 2: ......
