User`s guide

9
SET  AIR  ALTITUDE
When this item is accessed, it displays an
indication of the current altitude program (P0,
P1, P2, P3). Use the <+> or <-> buttons to enter
the desired value. Press <enter> to the oxygen
percentage and advance to the next setting.
Altitude programs:
P0
(0-700 m)(0-2296 ft)
P1
(700-1500 m)(2296-4921 ft)
P2
(1500-2400 m)(4921-7874 ft)
P3
(2400-3700 m)(7874-12139 ft)

WARNING
Do not dive in mountain lakes without
having first checked that the appropriate
altitude program is selected.
SET  AIR  PERSONAL CORRECTION
FACTOR
Nemo Excel includes a personal correction
factor, which you can set for added safety,
to make the algorithm more conservative.
The correction factor should be used by
inexperienced divers, for strenuous dives
or when diving after a prolonged period of
inactivity (fig. 23).
Fig. 23
The PF 0 program introduces no additional
margin of safety.
This icon, which appears during the dive,
indicates whether a personal correction factor
is enabled, and if so its level.
NOTE
This setting cannot be changed during the
dive. Therefore, carefully check all settings
before going underwater.

WARNING
The dive computer cannot ensure against
possible decompression sickness. The dive
computer cannot take into account the
physical conditions of the individual diver,
which may vary from one day to the next.
For your safety, have a general medical
check-up before undertaking a dive.
SET  AIR  FAST ASC
This function enables or disables the “Stop”
function in case of uncontrolled ascent, to
prevent the dive computer from locking out
after a rapid ascent.
The feature can be useful for instructors who
need to practice emergency ascents.
On being accessed, it displays the current
setting (“ON” or “OFF”).
Use the <+> or <-> buttons to change the
setting.
Press <enter> to save the changes and
advanced to the next setting.
SET  AIR  AL BEEP
This function enables or disables the audible
alarms.
On being accessed, it displays the current
setting (“ON” or “OFF”). Use the <+> or <->
buttons to change the setting. Press <enter>
to save the changes and advanced to the next
setting.

WARNING
A rapid ascent increases the risk of
decompression sickness (DCS).

WARNING
This function is intended only for highly
experienced divers, who take full
responsibility for the consequences of
disabling the “Stop” on uncontrolled
ascent.

WARNING
The audible alarms should only be disabled
by experienced divers, who take full
responsibility for this operation.
NOTE
The alarm for any deep stops always
remains active.
SET DIVE  MODE
Set Dive - Mode is used for setting the general
parameters for the planned type of dive, as
described previously for air. This section
covers dives using Nitrox breathing mixes.
NITROX
The general parameters for Nitrox dives are
the same as those for compressed air dives
(Air), with the addition of settings for the
percentage of oxygen and its maximum partial
pressure:
• oxygen percentage (%O
2
) in the Nitrox;
• maximum O
2
partial pressure (PPO
2
);
• altitude;
• personal correction factor;
• uncontrolled ascent;
• audible alarms.
This section will describe only the two
parameters specific to Nitrox dives. Therefore,
users are advised to carefully read the “Set
dive - Mode - Air” section, before proceeding
further with the Nitrox section.

WARNING
Users are advised to carefully read the
“Set Dive - Mode - Air” section, before
proceeding further with the section on
Nitrox dives.

WARNING
The use of oxygen rich mixes exposes
the diver to different hazards from those
associated with compressed air. The
diver should be aware of these risks and
understand how to avoid them.
SET  NITROX  %O
2
The percentage of oxygen in the Nitrox
breathing mix can be varied within the 21%
- 50% range, in increments of 1%. Use the
<+> or <-> buttons to enter the desired value.
Press <enter> to the oxygen percentage and
advance to the next setting (fig. 24).
Fig. 24
SET  NITROX  PPO
2
Nemo Excel sounds an alarm when the partial
pressure of oxygen reaches a pre-established
limit. This limit can be varied from a minimum
1.2 bar to a maximum of 1.6 bar, in increments
of 0.1 bar. Use the <+> or <-> buttons to enter
the desired value. As this value is varied,
Nemo Excel will show the maximum dive
depth compatible with the oxygen percentage
and maximum partial pressure that have
been programmed. Press <enter> to save the
changes made and advance to the next setting
(fig. 25).