User`s guide

Nemo Excel dive computer
14
DIVE  “DECO STOP” NITROX
The details displayed in the case of
decompression-stop Nitrox dives are the
following (fig. 38).
Fig. 38
• “deco” icon;
• current depth (in “m” or “ft”);
• depth of deepest decompression stop (in
“m” or “ft”);
• duration of the deepest decompression stop;
• duration of the dive so far, in minutes, shown
in analog form around the perimeter of the
dial;
• icons for the altitude program and personal
correction factor (if enabled).
On the display bar it is possible to view one of
the following
• the ascent time, i.e. the total time necessary
for surfacing;
• the %CNS.
Or
• the temperature (in °C or in °F);
• the duration of the dive so far (dive time) in
digits.
Or
• the % O
2
;
• the primary time.
NOTE
The procedure for scrolling the items on
the display is identical to that described in
the section on diving with compressed air.

WARNING
To fully understand how to perform
decompression with Nitrox, the
user should also carefully read the
corresponding section for compressed-air
deco stop dives.
SURFACING  NITROX
When the measured depth is less than 1 m
(3 ft), Nemo Excel considers the dive to be
suspended (“Surfacing”) and halts the dive
timer. If the diver does not return below 1.5 m
(5 ft) within the next 3 minutes, Nemo Excel
considers the dive to be finished and records
its data in the Log Book memory. If the diver
does re-descend within 3 minutes, the dive
continues and the dive timer resumes from
where it left off.
Data displayed in Surface mode:
• duration of the dive;
• maximum depth;
• icons for any mistakes made during the
dive(omitted stop, uncontrolled ascent).
SURFACE MODE  NITROX
The data displayed in Surface - Nitrox mode
is the same as that for Surface - Air mode,
except for the addition of the % CNS value.

WARNING
Do not fly or travel to high altitudes while
the no-fly indication remains active.
NOTE
If you have completed a Nitrox dive and
wish to do a repetitive dive with air, set the
computer for “Nitrox” with O
2
at 21%. By
so doing, the calculation of the %CNS will
remain active.
DIVE  BOTTOM TIME GAUGE
In this mode Nemo Excel functions as an
electronic timer and depth gauge, but does not
perform any calculations for no-deco limits
or for deco-stop times. Responsibility for
planning the no-decompression limits or an
adequate decompression therefore lies entirely
with the user.
The details displayed in Predive and Surfacing
mode are the same as those already described
for air or Nitrox dives (fig. 39).
Fig. 39
The details displayed in Dive Mode are instead
the following (fig. 40).
Fig. 40
• current depth;
• duration of the dive in minutes (also analog)
and seconds;
• ascent rate;
• temperature (in °C or in °F);
• the primary time.
Pressing the <+> or <-> buttons displays, for
approximately 8 seconds, the maximum depth
reached so far.

WARNING
We advise that when diving you always put
Nemo Excel into Predive mode.
This ensures correct functioning even if
the wet contacts are dirty with salt, oil,
sunscreen, etc...
Early in your dive, always check that the
dive computer is switched on.
SURFACE MODE  BT
The desaturation time and the delay before
flying or traveling to high altitudes are
displayed in the same way as for Air or Nitrox
dives.
NOTE
After a dive in “BT” mode, the transition to
“Air” or “Nitrox” mode will be disabled for
24 hours.
(This lockout can be disabled by clearing
the residual nitrogen memory in Set Dive -
Data mode).
BOTTOM TIME WITH BEHAVIOR ERROR
The following errors can occur during an air or
Nitrox dive:
• uncontrolled ascent;
• omitted stop.
In this case, Nemo Excel will inhibit the
Dive - Air and Dive - EAN modes for 24 hours,
allowing only operation in BT mode, while
continually displaying the underwater behavior
error in question.
The corresponding error icons are displayed in
Dive, Surface and Logbook mode.