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MATRIX Dive Computer
8
2 MENUS, SETTINGS AND
FUNCTIONS
This chapter describes in detail all menus,
setting and functions of the Matrix dive
computer.
Press and hold the top right button to reach
the main menu. Inside this you will see the
following submenus:
- mode: allows you to set the computer to air,
nitrox or bottom timer mode;
- settings: allows you to view and change all
settings relative to the dive computer, the
watch and the compass;
- logbook: allows you to access the detailed
history of the dives performed;
- planner: allows you to view no deco times
as a function of depth based on your current
nitrogen load;
- info: allows you to view information about
software and hardware of your Matrix.
Note that Matrix has a pre-dive function. This
puts the computer in a ready-to-dive mode.
and ensures that Matrix starts to monitor the
dive as soon as a depth of 1.2m/4ft is reached.
If you start the dive without putting Matrix
into pre-dive mode, it will start to monitor the
dive automatically but with a delay of up to 20
seconds from immersion.
To put Matrix in pre-dive mode, press and hold
the bottom right button. The screen will look
as depicted below.
NOTE
- If you remain in pre-dive for longer than
10 minutes without pressing any button,
Matrix will return to the time of day display.
- It is recommended to put Matrix into
pre-dive before submerging. Not doing
so can lead to a delay of up to 20s in
Matrix monitoring the dive.
2.1 MODE
The mode menu is reached from the time of
day display by pressing and holding the top
right button. Here you can define the type of
gas you will be breathing during the dive (air
or nitrox, including multigas). You can also set
Matrix to bottom timer, in which case Matrix
will show only time, depth and temperature:
it will not carry out any decompression
calculation and it will not show any warnings
and alarms.
Use the buttons on the right side to highlight
your choice, then press and hold the top right
button to activate it. air is the equivalent of
setting nitrox 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 nitrox, 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, use the buttons on
the right side to change the O
2
%, and watch
how this affects the maximum operating depth
(MOD). Then press and hold the top right
button to move on to the ppO
2
max and use the
buttons on the right to change the value, again
noticing how this affects the MOD. Press and
hold the top right button again to save and exit
the menu.
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 Matrix
corresponds to the oxygen concentration
in the tank. Setting the wrong oxygen
concentration can lead to serious injury
or death.
This is also the menu where you would be
setting your decompression gases if you dived
with more than one gas. See chapter 3.5 for
more information about diving with more than
one gas.
2.2 SETTINGS
Matrix’s settings menu allows you to access
functions or to change settings. Once inside
this menu, you will see three submenus: set
dive, where you can set parameters pertaining
to the dive, set watch, where you can set
parameters pertaining to the watch, and set
compass, where you can set parameters
relative to the digital compass.
8


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