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3.2.5 LOW BATTERY
WARNING
Do not start a dive if the low battery
warning is displayed on the screen on the
surface. The computer may fail to function
during the dive and this could lead to
serious injury or death.
If Matrix detects that the battery power level
is getting below 10%, it will show the message
LOW BATTERY on the display. In a LOW
BATTERY situation, the backlight is disabled,
as well as audible signals.
WARNING
When this warning appears, you should
stop the dive, safely, without delay.
If the battery is completely drained during
or right after a dive, Matrix will lose the
nitrogen loading information in the tissues,
and hence it will calculate the next dive
wrongly. Do not dive for 24 hours following
a dive in which the battery was completely
drained.
3.3 DISPLAY INFORMATION
Upon immersion, if Matrix was set to pre-dive,
it will immediately start monitoring the dive.
Otherwise, it will turn on automatically within 20
seconds of having reached a depth of 1.2m/4ft.
The default display presents dive information
in a prevalently numerical format. More
specifically, the following information is shown:
- current depth
- no deco time (or depth and duration of
deepest stop and total ascent time in case of
decompression dives)
- dive time
- temperature
- nitrogen saturation bar graph
By pressing the upper right button, you can
modify the upper row of information. At each
button press, the row cycles through the
following combinations:
- current depth
- current depth and max depth
- current depth and average depth
- current depth and MOD (nitrox dives only).
By pressing the lower right button, you can
choose which information to show in the
bottom right corner of the display between the
following:
- temperature
- time of day
- stopwatch (activated by a long press of the
bottom right button)
- oxygen concentration of the breathing mix
(nitrox dives only)
- ppO
2
(nitrox dives only)
- CNS% (nitrox dives only; for air dives
CNS% is not shown for simplification of the
interface, but it is tracked in the background
and the alarms are triggered if applicable).
In case of an ascent, the speed in m/min or ft/
min is displayed in lieu of the dive time for the
duration of the ascent.
The depth is given in 10cm resolution until
99.9meters, after which it is given in 1m
resolution. When the depth is displayed in
feet, the resolution is always 1 foot. At a depth
shallower than 1.2m/4ft, the display shows ---.
Maximum possible depth is 150m/492ft.
The dive time is displayed in minutes. If during
the dive you ascend to the surface, the time
spent on the surface will only be counted
if you descend again below 1.2m/4ft within
3 minutes. This allows for brief periods of
orientation. While on the surface, the time will
not show as progressing but it is running in
the background. As soon as you submerge, the
time will resume, including the time spent on
the surface.
The no deco time is calculated in real time and
updated continuously. Maximum displayed no
deco time is 99 minutes. If you remain at depth
beyond a no deco time of zero minutes, you will
enter into decompression: you can no longer
make a direct ascent to the surface and Matrix
displays a MANDATORY decompression stop.
Instead of a no deco time, it shows you the
depth and duration of the deepest stop and the
total ascent time (ASC), which includes each
decompression stop and the time required to
travel the vertical distance to the surface at a
rate of 10m/min / 33ft/min. ASC includes the
duration of deep stops as well. To emphasize
the presence of mandatory decompression
stops, the display inverts its colors, now
showing the top row in white on a black
background, the middle row in black on a white
background, and the bottom row in white on a
black background.
DEEP, DECO and SAFETY stops:
- A SAFETY stop is generated as soon as the
depth of the dive exceeds 10m / 33ft. It has
a duration of 3 minutes and it is carried
out between depths of 6m / 20ft and 3m /
10ft at the end of a dive prior to surfacing.
Such stop is NOT mandatory but HIGHLY
RECOMMENDED.
- DECO stops are generated progressively
as you stay down beyond the no deco time.
DECO stops are MANDATORY.
13


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