How-To Guide

1.2. OPERATING MODES
The functions of the CXR-I computer can be
grouped into three categories, each
corresponding to a specific mode of oper ation:
Once in the main menu, you will see the
familiar look of an icon-based user int erfac e.
From the top left, in sequence, there ar e:
SET DIVE: here you can review and set
all parameters relating to a div e;
SET COMPUTER: set the language, the
clock, display brightness and more;
COMPASS : from within this menu y ou
can use the compass while on the
surface, for instance to set a bearing
which you will call up later on in the
dive to navigate towards a wreck;
INFO: find information about the
hardware and firmware of your CXR-I;
MAPS : view all maps uploaded to y our
CXR-I;
PHOTOS : view all images uploaded t o
your CXR-I;
BLUETOOTH : establish a bluet ooth
connection to a device such as a
smartphone;
BUTTON LOCK : lock the buttons so
that the battery is not ac cident all y
drained during tr av el.
•
surface mode: the computer is dry on
the surface. In this mode you can change
settings, review your logbook, use the div e
planner, see remaining desaturation after a
dive, download to PC and much more;
dive mode: the computer is at a depth of
1.2m/4ft or more. In this mode, CXR-I
monitors depth, time, temperature and
performs all decompression c al culations;
dive mode itself can be broken down into 4
sub c at egories:
•
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pre-dive (CXR-I is on the surface but
actively monitoring ambient pressure, so
that it can begin to calculate a dive the
instant it is submerged below 1.2m/4ft);
div e
surfacing (CXR-I is on the surface at
the end of a dive; dive time c al culation
is halted but if the diver submerges
within three minutes the dive is r esumed
including the time spent on the surf ace;
this for instance would allow a diver t o
surface momentaril y to set a bearing
towards the boat, then submerge again
and swim towards the boat);
post-dive (after the three minutes of
surfacing mode, CXR-I closes the
logbook and r e v erts to a display sho wing
desaturation time, no-fly time and surf ac e
interval; this lasts until the desatur ation
and the no-fly time both have been
r educed to zer o);
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1.4.
RECHARGEABLE BA TTERY
CXR-I uses a lithium-ion r echar geabl e
battery. A full charge allows you up to 40 hour s
of diving, depending on the usage of the high
intensity on the backlight and the t emperatur e
of the water. The display alerts you of the
status of the battery. The four pos sibl e
situations are described as f ollo ws:
The rechargeable battery has a life time of
appr o ximat el y 500 charging cycles. Pl ease
contact your authorized Mares dealer if y ou
need to replace it.
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1.4.1. CHARGING THE BATTERY
The battery takes about 4 hours to char ge
from compl et el y empty to compl et el y full
when using the adapter that came with the
computer. It can take up to 8 hours when using
a standard adapter as not all adapters feed the
same current to the USB port. To charge the
battery, use the special clip and the USB c able,
connecting it either directly to a power suppl y
or to the USB port of a PC.
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A solid green battery symbol means CXR-I
has between 65 and 100% char ge;
A partiall y filled green battery symbol
means CXR-I has between 30 and 65%
char ge;
A partiall y filled yellow battery symbol means
CXR-I has between 20 and 30% char ge.
A partiall y filled red battery symbol means
CXR-I has between 0 and 20% charge. This
is not sufficient to ensure a safe div e.
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sleep mode: the computer is on the surf ac e
after 3 minutes without operation (10 minut es
from pre-dive mode). Though the comput er
appears to be turned off compl et el y , it is still
active. CXR-I computes tissue desatur ation
and checks the ambient pressure once e v ery
20 seconds for uninterrupted monitoring of
the envir onment.
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In the event that the charge drops below 30%
during a dive, the message LOW BATTERY
appears on the display. In the event that the
charge drops below 20%, the message ABORT
DIVE appears on the display. When you see this
message, you must start a safe ascent as ther e
may not be enough charge to continue diving.
1.5. COMMUNICATING VIA USB
CABLE OR BL UET OO TH
CXR-I can communicate via low po w er
bluetooth directly to a smartphone, a PC or a
Mac. The data transfer is such that only logbook
information can be transferred via bluet ooth
while firmware upgrades and image or map
uploads have to be carried out via PC or Mac.
To connect CXR-I to a PC or Macint osh
computer, use the dedicated clip and the USB
cable. Once connected, CXR-I will show the
USB symbol on the display .
To initiate a bluetooth connection, press and
hold the BT button from the home display or
1.3. TURNING ON CXR-I AND
MAIN MENU
To start the computer, press the left butt on.
This brings up the home display, shown in
Figure 1. The home display provides at-a-
glance information about time, t emperatur e,
battery status, settings of the algorithm and,
when paired to an active transmitter, t ank
pressure. From the home display you can c all
up the main menu with all available settings
and functions, but you can also directly r each
certain useful functions such as logbook, div e
planner, gas and algorithm settings, bluet ooth
connection.
select the icon from the main menu, then
start the MySSI app on your smartphone and
follow the instructions.
5
W ARNING
- Starting a dive with less than 20% char ge
can cause the computer to fail during the
div e.
- In sleep mode CXR-I uses up the batt ery
at a a very slow rate. If you haven’t used
CXR-I in se v er al weeks there may be a
noticeable drop in battery level, so y ou
may have to recharge it before diving.
- Leaving CXR-I unattended for l ong
periods of time such that the battery will
be compl et el y discharged does not harm
neither the battery nor CXR-I. Logbook
data and all settings will be saved. Aft er
charging you must however set the time
and date again.
- When the battery in CXR-I is compl et el y
discharged, it may take up to 20 minut es
from the moment it is connected to a
power source before CXR-I r eacts.
- T emperatur e can notic eabl y aff ect
battery performance. A low batt ery
warning may appear when diving in c old
waters even if you think that the batt ery
should have sufficient char ge.
- It is advised that you charge the battery if
you intend to dive in cold wat er .