8
air nitrox, including multigas). You can also
set Smart Air to bottom timer (BT), in which
case Smart Air will show only time, depth, tank
pressure and temperature: it will not carry out
any decompression calculation and it will not
show any warnings and alarms. You can set
Smart Air also to APNEA, which in essence is
a bottom timer with special features dedicated
to apneists.
Press the UP or DOWN button to scroll through
the four possible options (AIR, EAN, BT or
APNEA), then press and hold the UP button to
select it.
AIR is the equivalent of setting EAN to 21%
and a ppO
2
max of 1.4bar, but simplifies the
display a bit by not showing the CNS (its value
however is calculated in the background and if
needed the 75% warning and the 100% alarm
are triggered).
When selecting EAN, you are taken to
a submenu in which you can define the
percentage of oxygen in the mixture (%O
2
) and
the maximum value of oxygen partial pressure
(ppO
2
max) for up to three breathing mixes. The
maximum possible value for the ppO
2
max is
1.6bar. Most training agencies recommend not
to exceed a value of 1.4bar.
Once inside this menu, press the UP or DOWN
button to change the O
2
% and observe how this
affects the maximum operating depth (MOD).
Then press and hold the UP button to move
on to the ppO
2
max and use the UP or DOWN
button to change the value, again noticing how
this affects the MOD. Press and hold the UP
button again to save the setting.
This leads you to the G2 OFF screen. Press and
hold the DOWN button to exit the menu or go
to section 3.5 to read about diving with more
than one gas.
WARNING
- Diving with Nitrox may only be
attempted by experienced divers after
proper training from an internationally
recognized agency.
- Before every dive and after changing
the tank, you must make sure that the
set oxygen concentration in Smart Air
corresponds to the oxygen concentration
in the tank. Setting the wrong oxygen
concentration can lead to serious injury
or death.
2.4. SEt
Smart Air’s SEt menu allows you to change
settings. Once inside this menu, press the
UP or DOWN button to scroll between two
submenus: SEt dIVE, where you can set
parameters pertaining to the dive, and SEt
tIME, where you can set parameters pertaining
to time and date.
Press and hold the UP button to enter a menu,
press the UP or DOWN button to scroll up and
down between available options or to increase
or decrease the value of a setting. Then press
and hold the UP button to confirm the change
in setting. Press and hold the DOWN button to
go up one level in the menu tree.
MENU Description
SEt dIVE
- LGHt
Allows you to set the duration
after which the backlight
turns off automatically. You
can set this between 1 and 10
seconds.
- P FACt
Allows you to choose between
the standard algorithm (P0)
and an increasingly more
conservative one (P1, P2).
- ALt
Allows you to set the algorithm
into altitude mode when diving
in mountain lakes.
- WAtR
Allows you to choose between
salt (1.025kg/l) and fresh
(1.000kg/l) water or EN-319
(1.0197kg/l), corresponding
to the water density used in
European Norm 13319.
- GAS IntEGr
Allows you to pair your Smart
Air with optional tank modules
and to define all parameters
concerning gas integration
(tank volume, half tank
pressure and tank reserve).
- UnItS
Allows you to choose between
metric (m, °C, bar) and
imperial (ft, °F, psi) units.
- FASt
Allows you to turn off the dive
violation due to uncontrolled
ascent. This is for dive
instructors only, who may
find themselves in such a
situation because of their
teaching requirements.
- dEEP
Allows you to activate or
deactivate the visualization of
deep stops.
- ALAR
Allows you to turn on or off all
audible alarms of Smart Air.
- ERASE
Allows you to reset the
nitrogen saturation to zero,
thereby erasing the effects of
a previous dive. This is only for
people who plan to lend their
computer to another diver
who has not performed a dive
within the last 24hours.
SEt tIME
Allows you to set the time
format, time and date, wake-
up alarm and second time.
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