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M2 USER MANUAL
The current altitude class is shown on the left
on the bottom row and the prohibited altitude
is shown on the right. In the example above,
the diver is presently at altitude class 0 and
should not reach altitudes above 3000m (class
3) within the given interval of 6 hours and 15
minutes.
By increasing the interval time on the middle
row the allowed altitude increases due to the
desaturation caused by the time spent at the
current altitude class.
F
NOTE: When the no repetitive dive
symbol is on, the planner on the middle
row initially shows the time period
when diving would be allowed again.
For planning the altitude excursion the
interval time can be reduced, which
causes the prohibited altitude level to
decrease.
The M2 has an altitude warning: if you
were to reach an altitude that, according to
the M2, is incompatible with your current
residual nitrogen levels, it will warn you with
an altitude warning.
4.10.4 Decompression dives in
mountain lakes
In order to ensure optimal decompression
even at higher altitudes, the 3m/10ft
decompression stage is divided into a
2m/7ft stage and a 4m/13ft stage in
altitude ranges 1, 2 and 3.
If atmospheric pressure is below 610mbar
(altitude higher than 4000m/13300ft), no
decompression calculation is carried out
by the M2 (automatic GAUGE mode). In
addition, the dive planner is not available in
this altitude class.
4.11 Warnings and alarms
The M2 can alert you of potentially
dangerous situations via warnings and
alarms. You can only modify the warning
settings via PC interface.
Warnings
represent situations that require
the diver’s attention, but ignoring them
does not represent an immediate risk. It is
up to you to decide which ones you would
like to be active and which ones not. The
available warnings are:
4.11.1 CNS O
2
= 75%
The M2 tracks your oxygen uptake via the
CNS O
2
clock. If the calculated value of
CNS O
2
reaches 75%, the M2 will emit a
sequence of audible beeps for 12 seconds
and the % symbol will be blinking in the top
right corner. The blinking will continue until
the value of CNS O
2
drops below 75%.
4.11.2 No-stop time = 2 minutes
If you wish to avoid unintentionally
performing a decompression dive, the M2
can activate a warning when the no-stop
time reaches 2 minutes. This applies to
Summary of Contents for M2
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