22
Functions during the dive
4.3 Preparation for the dive
You have to check the settings of Aladin TEC 3H especially before the first dive. All settings can be
checked and changed directly at Aladin TEC 3H or via LogTRAK.
4.3.1 Setting the gas mixture and ppO
2
max
WARNING
Before every dive and after changing the tank, make sure that the settings for the gas mixture
correspond with the current mixture used. An incorrect setting causes Aladin TEC 3H to
miscalculate this particular dive. If the fraction of oxygen is set too low this can lead to oxygen
poisoning without warning. If the value is set too high decompression sickness may occur.
Inaccuracies in the calculations are carried over to repetitive dives.
For dives with 2 or 3 gas mixtures please read
page 45 for further reference.
For CCR dives please read page 52 for further
reference.
To set the gas mixture, Aladin TEC 3H must be in
user mode (time of day display).
or
until
1. Push
or
until the GAS 1 O
2
menu
appears.
2. Confirm that you wish to change the oxygen frac-
tion of gas 1 by pushing
.
Max Operating
Depth MOD
Change the O
2
% mix by
.
(+) and
(–)
ppO
2
max
3. Change the oxygen fraction in increments of
1% by pushing
or
. Aladin TEC 3H
will display the current fraction of oxygen, the
maximum partial pressure limit (ppO
2
max) and
the MOD.
4. Confirm the selected percentage with
.
Change the ppO
2
max by
.
(+) and
(–)
5. By pushing
or
you can change the
ppO
2
max for the chosen fraction of oxygen
down to 1.0bar. Aladin TEC 3H will now
display the corresponding MOD for the new
ppO
2
max.
6. Confirm your ppO
2
max settings with
.
F
• Without confirmation the display will disappear after 3 minutes and your entries will not
be accepted.
• Automatic reset of the O
2
% mix to 21% can be set with 'set 1' -> 'Reset to air' or with
LogTRAK between 1 and 48 hours or to "no reset" (default).
