User`s guide

Nemo Excel dive computer
18
Press the <-> button to choose to view one of
the following on the display bar:
• number of dives done during the session;
• longest dive time.
Or
• type of water (Salt, Fresh).
Or
• coldest logged temperature.
Press the <enter> button to access a menu
for viewing the principal data of the individual
dives.
NOTE
If the alarm settings are changed during
the surface interval, Nemo Excel will close
the session currently in progress and
initiate a new one (attention: in this case,
even if all the dives take place in the same
day, Nemo Excel will delete the profiles
of any dives completed before making the
changes to the settings).
NOTE
All the Free Dive mode alarm settings are
recorded, however they can only be displayed
using the PC Iris interface (optional).
LOG BOOK  FREE  DIVE DATA
This mode displays the summary data for the
dives of a particular session selected in Log
Book - Session - Data. To move between the
different dives, which are numbered in reverse
chronological order, press the <+> or <->
buttons (fig. 54).
Fig. 54
The following details are displayed:
• maximum depth reached;
• time at the surface before the dive;
• dive time elapsed.
The profile of the last session can only be
displayed by downloading the data to a PC
(using the optional IRIS interface).
PC MODE
INTERFACING TO A PC
Using a special interface unit and a dedicated
Windows software application, it is possible to
transfer all the data from the Nemo Excel Log
Book to a personal computer.
The communication between Nemo Excel and
the PC is optical. It takes place via the special
•
Iris interface unit (optional) which converts the
optical signals into electrical signals and vice
versa (fig. 55).
Nemo Excel is provided with an infrared
transmitter, situated beneath the display at the
“6 o’clock” position. During data transfer it is
essential not to obstruct this area.
To begin uploading data from Nemo Excel to
the personal computer, select PC mode on
Nemo Excel and then follow the instructions
provided by the interface software installed on
the personal computer.
Fig. 55
TROUBLESHOOTING
QUESTIONS AND ANSWERS
Q: When I replace the battery, will my Log
Book dive data be lost?
A: No.
Q: What happens if I replace the battery after
a dive, before the desaturation time has gone
to zero?
A: The residual nitrogen memory will be
cleared, and the RGBM calculations for any
previous dives will be aborted. The diver who
used the computer in the previous dive must
not dive for at least 24 hours.
Q: What happens if I start a dive while Nemo
Excel is still in Time mode?
A: Nemo Excel constantly monitors for
contact with water. When water is detected it
remains in Time mode, but prepares to activate
Dive mode as soon as the user descends below
1.5 m (5 ft) in Scuba mode or below 1 m (3 ft) in
Free Dive mode.
Q: What happens if there is an uncontrolled
ascent or omitted decompression stop during
an “Air” or “Nitrox” dive?
A: At the end of the dive Nemo Excel will
automatically switch to “Stop” mode. The only
Scuba mode that remains active, in this case,
is “Bottom Time”
Q: What indicates that “Bottom Time” mode
was chosen by the user, rather than forced as
a result of underwater behavior errors during
the preceding dive?
A: In the latter case, during the dive and in
surface mode, the pertinent error icons are
displayed along with the standard “Bottom
Time” indications.
Q: If I select “Air” or “Nitrox” mode after
completing a dive in “Bottom Time” mode, how
will the new dive be managed?
A: Nemo Excel does not allow you to do
an “Air” or “Nitrox” dive in the 24 hours
immediately following a “Bottom Time” dive.
•
Q: Where can I find the product serial
number?
A: From the main menu (refer to the quick
guide or the “Warranty” chapter).
Q: What is the purpose of “Off” mode?
A: Switching Nemo Excel to “Off” mode when
it is not in use prolongs the life of the battery.
All the settings will still be retained, and Time
mode remains active.
Q: If I already own the Iris interface, can I use
it with Nemo Excel?
A: You need to check that the software
version supports the Nemo Excel data format.
If this is not the case, download the latest
version from the website.
Q: Sometimes the temperature indication is
too high in time mode.
A: The thermometer was calibrated for use
underwater; out of the water Nemo Excel is
affected by your body temperature. Therefore
if you want a more accurate temperature
reading, we suggest that you take the Nemo
Excel off your wrist and leave it for a few
minutes on a surface that is not influenced by
other temperatures.
Q: When I switch on Nemo Excel, some
strange characters appear on the display.
A: During switch-on Nemo Excel performs
a self-test of the system and display. This
procedure lasts a few seconds. At the end of
the self-test Nemo Excel automatically goes
into Time Mode.
Q: In Off mode, in addition to the serial
number, two small numbers are displayed
near the hour 3. What are they?
A: These numbers indicate the version of
firmware installed.
Q: Every so often, two opposing arrows
appear on the left of the display. What are
they?
A: When lit, the two icons signal the activation
of the wet contact.
MAINTENANCE
It is advisable to periodically clean the surface
of the sensor which detects contact with water,
to prevent any deposits from compromising the
correct functioning of Nemo Excel. Do not use
chemical products; wiping with a soft cloth is
sufficient.
At the end of a dive (even in a swimming pool)
or whenever Nemo Excel has been submerged,
wipe the surface of the sensor which detects
contact with water.
After diving in seawater it is recommended
that you rinse Nemo Excel with fresh water to
remove any salt residues.

WARNING
The steel case and the mineral glass are
not exempt from possible scratches caused
by improper use.
NOTE
If signs of moisture are observed on the
interior of the mineral glass, take your
Nemo Excel immediately to an authorized
Mares service center. In any case, Mares
declines responsibility for any water
infiltrations resulting from an incorrect
battery replacement procedure.