Instruction Manual

SIRIUS Dive Computer
6
1.2. OPERATING MODES
The functions of the Sirius computer can
be grouped into two categories, each
corresponding to a specific mode of operation:
• watch mode: Sirius is dry on the surface. In
this mode you can use it as a normal watch.
You can also change settings, review your
logbook, use the dive planner, see remaining
desaturation after a dive, download to smart
phone and much more;
• dive mode: Sirius monitors depth,
time, temperature and performs all
decompression calculations; dive mode
itself can be broken down into 4 sub
categories:
- pre-dive (Sirius 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);
- dive;
- surfacing (Sirius is on the surface at
the end of a dive; dive time calculation
is halted but if the diver submerges
within three minutes the dive is resumed
including the time spent on the surface);
- post-dive (after the three minutes
of surfacing mode, Sirius closes the
logbook and reverts to a display showing
desaturation time, no-fly time and surface
interval; this lasts until the desaturation
and the no-fly time both have been
reduced to zero).
1.3. RECHARGEABLE BATTERY
Sirius uses a rechargeable battery. A full
charge allows you up to 30 hours of diving,
depending on the usage of the backlight
and the temperature of the water. If during
a dive the battery level drops to 15%, Sirius
will display a low battery warning. When this
appears, you should start your final ascent to
the surface.
⚠
WARNING
- Sirius will not enter in dive mode if the
battery level is 20% or less.
- Leaving Sirius unattended for long
periods of time such that the battery will
be completely discharged does not harm
neither the battery nor Sirius. Logbook
data and all settings will be saved. After
charging you must however set the time
and date again.
- When the battery in Sirius is completely
discharged, it may take up to 20 minutes
from the moment it is connected to a
power source before Sirius reacts.
- Temperature can noticeably affect
battery performance. A low battery
warning may appear when diving in cold
waters even if you think that the battery
should have sufficient charge.
- It is advised that you charge the battery if
you intend to dive in cold water.
The rechargeable battery has a life time of
approximately 500 charging cycles. Please
contact your authorized Mares dealer if you
need to replace it.
1.3.1. CHARGING THE BATTERY
Sirius charges the battery via the included
induction charger. Simply lay Sirius face up on
the pad and verify that the charging symbol
appears on the display. The battery takes about
3 hours to charge from completely empty to
completely full.
1.4. COMMUNICATING VIA
BLUETOOTH
Sirius can communicate via low power
bluetooth and the apps MARES or MySSI
directly to a smartphone to transfer logbook
information or to perform firmware upgrades.
To initiate a bluetooth connection, select
BLUETOOTH from the main menu, then start
the Mares or MySSI app on your smartphone
and follow the instructions.
1.5. BUTTON OPERATION AND
WATCH FUNCTIONS
Sirius has four buttons, which we refer to as
TL (top left), BL (bottom left), TR (top right) and
BR (bottom right). Each button can perform
two operations, depending on whether it is
pressed and released (short press - SP) or
pressed and held for one second (long press
- LP). A button operation is then defined, for
instance, as TL-SP: top left, short press.
In TOD (Time Of Day display - watch mode):
BL:
- SP cycles through the three watch faces:
BIG, DETAIL and ANALOG; In case of
residual nitrogen from a dive, the POST DIVE
display appears after ANALOG.
- LP calls up the COMPASS. While in compass,
TR-SP sets a bearing, TR-LP erases a set
bearing. BL-SP exits the compass.
TL:
- SP brings up the STOPWATCH. Once in
stopwatch mode, TR-SP starts and stops,
BR-SP takes a lap time and resets, BL-SP
exits and returns to TOD display.
- LP brings up the COUNTDOWN TIMER.
Once in timer mode, TR-SP starts and
stops, BR-SP resets (also while the timer
is running), TR-LP allows to set the time
(when the timer is not running), BL-LP
toggles between REPEAT ON and REPEAT
OFF. BL-SP exits and returns to TOD display.
TR:
- SP puts Sirius into PRE-DIVE mode. From
here, TR-SP brings up the GF TABLE (from
which you can access the GF settings) and
BR-SP brings up the gas setting menu.
BL-SP returns to TOD display.
- LP brings up the MENU. Once inside the
menu, TR-SP moves up in the list while
BR-SP moves down. TR-LP enters the
selected line while BR-LP goes back one
level. BL-SP returns to TOD display.
BR:
- SP changes the color of the seconds,
scrolling through all options.
- LP switches the background to white and
the white foreground to black.
In DIVE MODE
BL:
- SP cycles through E-Z, COMPLICATIONS,
DIVE PROFILE, TISSUE SATURATION
GRAPH and LIST OF STOPS (for
decompression dives).
- LP calls up the COMPASS, While in compass,
TR-SP sets a bearing, TR-LP erases a set
bearing. BL-SP exits the compass.
TL:
- SP resets the stopwatch even when it is not
visible on the display.
- LP brings up the UW MENU.
TR:
- SP modifies the information field in the top
row momentarily (E-Z) or in the top right
corner (COMPLICATIONS)
- LP activates the backlight.
BR:
- SP modifies the information field in the
bottom row momentarily (E-Z) or in the
bottom right corner (COMPLICATIONS)
- LP brings up the GAS SWITCH TABLE
(for multigas dives).
Figure 1 provides a schematic view of button
function in watch mode and in dive mode.
1.5.1. WATCH FACES
Sirius offers you a choice of watch faces (Fig. 2):
- BIG: digital time in XXL size;
- DETAIL: digital time with seconds and
battery information;
- ANALOG: analog watch face.
These are placed in a loop accessible with
BL-SP. In case of a recent dive, the POST DIVE
display is part of this loop as well.
1.5.2. DIGITAL COMPASS
Sirius has a tilt-compensated digital compass
which can be used at almost any inclination.
The compass can be called up at any moment
on the surface or during a dive by BL-LP (Fig.
3). With TR-SP you can set a reference bearing.
This is useful for instance if you are on a boat
and there is a landmark on the shore that you
can use for alignment to reach a specific spot
on that dive site. A dot will appear to indicate
the set bearing. Additional symbols will appear
as well: squares at 90 degrees, triangles at 120
degrees and two parallel lines at 180 degrees,
as an aid in navigation for square, triangular
and reciprocal courses. Once underwater, align
the dot with the arrow and start swimming in
that direction.
The number underneath the ribbon represents
the deviation of the direction you are pointing
at with reference to the set bearing. In dive
mode the stopwatch appears next to it, useful
to time legs of a course.
Repeating TR-SP sets a new bearing, while
TR-LP erases the set bearing.
BL-SP exits the compass and returns to TOD
display or dive display.
1.5.3. STOPWATCH
TL-SP from any TOD display brings up the
STOPWATCH. Once in stopwatch, TR-SP starts
and stops, BR-SP takes a lap time while the
stopwatch is running and resets it when it