User`s guide

Nemo Excel dive computer
10
Fig. 25

WARNING
It is essential to correctly set the oxygen
percentage in the mix to ensure correct
readouts of:
• no decompression time remaining;
• decompression stop times;
• alarm on exceeding the maximum
permitted PPO
2
.
DIVE
Nemo Excel manages four different types of
dive:
Scuba
AIR
Nitrox (EAN)
Bottom Time (Gauge)
Free dive
Free Diving
In Set Dive mode it is possible to select the
desired type of dive and set up the general
parameters for the dive.
In this section we will describe the settings for
SCUBA dives (Air - Nitrox - Bottom Time).
To help clarify the functioning of Nemo Excel
during the dive, the display screens have been
grouped into four stages:
Predive
Dive
Asc Time (time to surface)
Decompression stops
Deep Stops
Ascent rate
Safety stop
Surfacing
Surface mode
PREDIVE  AIR
This operating mode remains active until the
diver goes below 1.2 meters (4 feet).
The following details are displayed (fig. 26):
• type of dive (Air);
• units of measurement (m-°C or ft-°F);
• type of water (Salt, Fresh);
• altitude program (if enabled) and level;
• personal correction factor (if enabled) and
level;
• battery power level.
•
Fig. 26
The battery power level is shown graphically
along the perimeter of the dial.
If the indication drops below the “6 o’clock”
position it is advisable to replace the battery
immediately before diving in particularly cold
water, or if a lenghty series of dives is planned.
Do not dive if the residual battery charge
is less than 25% (graphically equivalent to
one quarter of the dial). If the battery power
indicator drops below the “2 o’clock” mark
on the dial, the “low battery” icon will appear.
In this case, the backlight function will be
disabled. Under these conditions the battery
has a residual life of approximately two more
standard dives, therefore it is advisable to
replace it immediately.
When the power indicator drops below the “1
o’clock” mark Nemo Excel disables the dive
computer, and only the time function remains
active. Immediately replace the battery to
resume using it as a dive computer.
NOTE
If Predive Mode persists for more than
10 minutes without any button being
pressed, Nemo Excel will revert to Time
Mode.
NOTE
Before every dive, it is advisable to enter
Set Dive mode and check all the parameter
settings.

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.
DIVE  AIR
“NODECOMPRESSION” DIVE
When the diver descends below 1.2 meters
(4 ft) Nemo Excel automatically switches to
Dive Mode and starts displaying the dive data.
If this mode persists for more than 20 seconds,
Nemo Excel will begin recording the dive
details in the Log Book memory (fig. 27).
Fig. 27
The following details are displayed:
• current depth (in “m” or “ft”);
• no decompression time remaining,
expressed in minutes;
• “no deco” icon;
• duration of the dive 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 temperature (in °C or in °F);
• the duration of the dive so far (dive time) in
digits.
Or
• the temperature (in °C or in °F);
• the primary time.
DIVE  AIR
In Dive Mode, the buttons have different
functions (fig. 28):
Fig. 28
<+> button:
• temporarily replaces the current depth
reading with the maximum depth (for
5 seconds, after which the display reverts to
showing the current depth);
• holding down the button for 2 seconds
activates the display backlight.