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MATRIX Dive Computer
12
3.2.2 MOD/ppO
2
WARNING
- The MOD should not be exceeded.
Disregarding the alarm can lead to
serious injury or death.
- Exceeding a ppO
2
of 1.6bar can lead to
sudden convulsions resulting in serious
injury or death.
When the diver reaches a depth at which the
ppO
2
of the inspired gas exceeds the maximum
limit entered in the corresponding setting
(from 1.2 to 1.6bar), an audible alarm goes
off, the current depth starts to blink and the
message MOD ALARM is shown at the bottom
of the display. In addition, the value of the MOD
is shown to the right of the current depth.
The alarm persists until the diver has
ascended enough for the ppO
2
to return within
the set limit. While the alarm is active, the
compass can only be called up for 8 seconds,
after which the default display with the alarm
message is shown again.
WARNING
When the MOD alarm is triggered, ascend
immediately until the alarm stops. Failure to
do so could result in serious injury or death
.
3.2.3 CNS = 100%
WARNING
When the CNS reaches 100% there is
danger of oxygen toxicity. Start procedure
to terminate the dive.
Oxygen toxicity exposure is tracked on
Matrix by means of the CNS % based on
currently accepted recommendations for
exposure limits. This toxicity is expressed as
a percentage value which ranges from 0%
to 100%. When the value reaches 75%, an
alarm goes off and the message CNS > 75%
appears for 10 seconds. Additionally, once the
text message has expired, the CNS becomes
the default item in the lower right corner:
if you call up other information such as the
temperature or the time of day, after 8 seconds
the CNS appears again. Ascend to shallower
depth to decrease oxygen loading and consider
terminating the dive.
When the oxygen toxicity level approaches
100%, the alarm message CNS > 100%
appears. The alarm message and the audible
signal are repeated for 5 seconds in one-
minute intervals after the first occurrence
and for as long as the value of CNS stays at
or above 100%. Consider terminating the dive
immediately!
WARNING
Diving with oxygen toxicity at levels of 75%
or greater may put you into a potentially
hazardous situation, which could result in
serious injury or death.
3.2.4 MISSED DECOMPRESSION STOP
WARNING
Violating a mandatory decompression
obligation may result in serious injury or
death.
If you ascend above the decompression stop
depth by more than 0.3m (1ft), a downward
pointing triangle appears, an audible alarm
goes off and the message STOP AT 3m! or
STOP AT 10ft! is displayed at the bottom of the
screen (or whatever the depth of the stop is).
This alarm remains active until you return to
the correct depth. Note that while the alarm
is active, the compass can be viewed only for
8 seconds before the screen returns to the
default display.
WARNING
- When the missed deco stop alarm is
triggered, desaturation of the simulated
tissue compartments is halted and
resumes only when the diver returns to
the correct stop depth.
- Never ascend above the displayed
decompression stop depth.
3.2.4.1 MISSED DECO STOP MODE
If the stop depth is exceeded by more than 1m
(3ft) for more than three minutes, Matrix
considers it a dive violation and the display will
show
.
In this case, if the diver attempts a repetitive
dive after surfacing, Matrix will function
only as a depth gauge and timer (bottom
timer mode), and it will display the message
LOCKED in the middle of the screen.
12


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