Changing the gas mixture
After immersion, Aladin automatically selects gas 1.
When during an ascent the switch depth is
reached (MOD gas D), an audible warning goes
off and "GAS d", its MOD and O
2
% blink for 30
seconds.
Procedure:
1. Switch to the regulator with gas D and start breathing.
2. Confirm the change by pressing
within 30 seconds. "GAS d" and the
oxygen fraction of gas D is displayed for 5 seconds without blinking.
To interrupt the switch process at any point, press
.
VI Diving with two gas mixtures
Switch depth
No change of gas mixture:
If a diver fails to confirm the change of gas mixture or interrupts the switching
procedure by pressing , Aladin displays "GAS 1", the MOD and the oxy-
gen fraction for 5 seconds. Aladin continues to calculate with gas 1 only and
adapts the decompression calculation accordingly.
If after the decompression calculation has readjusted itself to reflect
the failed switch the diver goes again below the switch depth (MOD
of gas D), Aladin will revert to the decompression calculation that
considers gas D also, since upon ascending again the diver will
have a renewed opportunity to perform the switch once the switch
depth is reached.
Belated change of gas mixture:
A diver can catch up on a required change to gas D until he reaches the sur
-
face.
1. Initiate the switching process by pressing . Aladin displays "GAS d", MOD
and the oxygen fraction of gas D blinking for 30 seconds.
2. Switch to the regulator with the deco gas mixture and start breathing.
3. Confirm the change by pressing
. "GAS d" and the oxygen fraction of
the deco gas is displayed for 5 seconds without blinking. The decompression
calculation will readjust accordingly. (Press to interrupt the switch process
at any time.)
Submerging again after a change to gas D:
If after a change to gas D the Maximum Operating Depth (MOD) of gas D is
exceeded, the ppO
2
max warning will appear ->25.
Change back to gas 1, which is suited for this depth, or rise to the Maximum
Operating Depth of gas D. Failure to do so can result in oxygen poisoning.
1. Initiate the switching process by pressing . Aladin displays "GAS 1", MOD
and the oxygen fraction of gas 1 for 30 seconds.
2. Switch to the regulator with gas 1 and start breathing.
3.
C
onfirm the change by pressing . "GAS 1" and the oxygen fraction of
gas
1
is displayed for 5 seconds without blinking. Afterwards the decompres-
sion calculation will readjust accordingly.
4s
MOD gas d
VI UWATEC Aladin TEC 2G
MOD gas 1
MOD gas d
40
