Mares Smart Instruction Manual

Instruction Manual

Smart Dive Computer

Smart Dive Computer

2

• TABLE OF CONTENTS

1. INTRODUCTION 3

1.1. GLOSSARY 3

1.2. OPERATING MODES 4

1.3. USERREPLACEABLE BATTERY 4

1.4. CONNECTING SMART TO A PC OR MAC 4

1.5. BUTTON OPERATION 4

1.6. WATCH DISPLAY 6

2. MENUS, SETTINGS AND FUNCTIONS 6

2.1. CHRONO 6

2.2. PRE DIVE 6

2.3. MODE 6

2.4. SET 7

2.4.1. SET DIVE 7

2.4.1.1. LGHT BACKLIGHT 7

2.4.1.2. P FCT P FACTOR 8

2.4.1.3. ALT ALTITUDE 8

2.4.1.4. WATR WATER 8

2.4.1.5. UN:TS UNITS 8

2.4.1.6. FAST FAST ASCENT 8

2.4.1.7. ALRM ALARMS 8

2.4.1.8. ERASE ERASE DESATURATION 8

2.4.1.9. DEEP 8

2.4.2. SET TIME 9

2.5. LOGBOOK 9

2.6. DIVE PLANNER 9

2.7. PC 9

2.8. INFO 9

3. DIVING WITH SMART 10

3.1. A FEW WORDS ABOUT NITROX 10

3.2. ALARMS 10

3.2.1. ASCENT RATE 10

3.2.2. MOD/PPO2 10

3.2.3. CNS = 75% 10

3.2.4. MISSED DECOMPRESSION STOP 11

3.2.4.1. MISSED DECO STOP MODE 11

3.2.5. LOW BATTERY 11

3.3. DISPLAY INFORMATION 11

3.4. AFTER THE DIVE 12

3.5. DIVING WITH MORE THAN ONE GAS MIXTURE 12

3.5.1. SETTING MORE THAN ONE GAS 13

3.5.2. SWITCHING GAS 13

3.5.3. SPECIAL SITUATIONS 13

3.5.3.1. SWITCHING BACK TO A GAS MIXTURE WITH
LOWER OXYGEN CONCENTRATION 13

3.5.3.2. SUBMERGING BELOW THE MOD AFTER A GAS
SWITCH 13

3.6. BOTTOM TIMER MODE 13

3.6.1. DIVE VIOLATION INDUCED BOTTOM TIMER MODE 14

3.7. FREE DIVE MODE 14

3.7.1. SETTINGS 14

3.7.2. USING SMART ON A FREE DIVE 14

3.7.2.1. SURFACING BETWEEN IMMERSIONS 14

3.7.3. LOGBOOK IN FREE DIVE MODE 14

4. TAKING CARE OF SMART 15

4.1. TECHNICAL INFORMATION 15

4.2. MAINTENANCE 15

4.2.1. REPLACING THE BATTERY IN SMART 15

4.3. WARRANTY 16

4.4. WARRANTY EXCLUSIONS 16

4.5. HOW TO FIND THE PRODUCT SERIAL NUMBER 16

5. DISPOSAL OF THE DEVICE 16

3

• 1. INTRODUCTION

1.1. GLOSSARY

:

Symbolizes uncontrolled ascent violation.

:

Symbolizes decompression stop violation.

ASC:

Total ascent time, the time it takes to perform the ascent from your current
depth to the surface in a decompression dive, including all decompression
stops and assuming an ascent rate of 10m/min or 33ft/min.

AVG: Average depth, calculated from the beginning of the dive.

CNS: Central Nervous System. CNS% is used to quantify toxic effects of oxygen.

DESAT:

Desaturation time. The time needed for the body to eliminate the nitrogen
taken up during diving.

Gas switching: The act of changing from one breathing gas to another.

Max depth: Maximum depth attained during the dive.

MOD:

Maximum Operating Depth. This is the depth at which the partial pressure
of oxygen (ppO

2

) reaches the maximum allowed level (ppO2max). Diving

deeper than the MOD will expose the diver to unsafe ppO2 levels.

Multigas:

Refers to a dive in which more than one breathing gas is used (air and/or
Nitrox).

Nitrox:

A breathing mix made of oxygen and nitrogen, with the oxygen
concentration being 22% or higher.

NO FLY /

:

Minimum amount of time the diver should wait before taking a plane.

No deco time:

This is the time that you can stay at the current depth and still make
a direct ascent to the surface without having to perform mandatory
decompression stops.

O

2

: Oxygen.

O2%: Oxygen concentration used by the computer in all calculations.

P Factor:

Personalization factors, which allow the user to select between the
standard decompression algorithm (P0) and an increasingly more
conservative one (P1, P2).

ppO

2

:

Partial pressure of oxygen. This is the pressure of the oxygen in the
breathing mix. It is a function of depth and oxygen concentration. A ppO2
higher than 1.6bar is considered dangerous.

ppO

2

max:

The maximum allowed value for ppO2. Together with the oxygen
concentration it defines the MOD.

Switch:

The depth at which the diver plans to switch to a higher oxygen
concentration mix while using the multigas option.

SURF INT: Surface interval.

Smart Dive Computer

4

1.2. OPERATING MODES

The functions of the Smart computer
can be grouped into two categories, each
corresponding to a specific mode of operation:

• watch mode: Smart 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 PC
and much more;

• dive mode: Smart monitors depth,
time, temperature and performs all
decompression calculations; dive mode
itself can be broken down into 4 sub
categories:

- pre-dive (Smart 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 (Smart 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, Smart 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. USERREPLACEABLE BATTERY

Smart uses a CR2430 user-replaceable
battery. See section 4.2.1 for instructions on
how to replace it. Good quality batteries should
suffice for approx 200-300 dives over a two­year time span, depending on the usage of the
backlight and the temperature of the water.
Diving in cold water, usage of the backlight and
of the beeper increases battery consumption.
Refer to section 4.1 for more details on battery
life.

The display alerts you of the status of the
battery. The three possible situations are
described as follows:

- battery symbol not visible in the pre-dive
and dive display: the remaining battery
charge is adequate for diving;

- steady battery symbol on the display (dive
and pre-dive): there is enough charge for
a few more dives, but you should consider
replacing the battery at the next opportunity;

- blinking battery symbol on the display: the
battery is too weak for diving. If this happens
during a dive, you must not perform any
more dives before replacing the battery.
If you see the blinking battery symbol on
the surface, be aware that Smart will not
function as a dive computer and will not turn
on if submerged.

The level of the battery charge can also be
found on the “INFO” page (see section 2.8).

1.4. CONNECTING SMART TO A PC
OR MAC

To connect Smart to a PC or Macintosh
computer, use the optional clip and the USB
cable and Dive Organizer to download your
dives to a PC or Divers’ Diary to download your
dives to a Mac. Both software programs can be
downloaded from www.mares.com.

1.5. BUTTON OPERATION

Smart has 2 buttons, labelled up/enter and
down/esc. Each button can be pressed and
released to perform one function (up and
down) and pressed and held for one second to

perform a different function (enter and esc).
We’ll refer to them as upper and lower button
in the remainder of this manual.

On the surface pressing and releasing either
button allows to scroll through menus,
settings and values. Pressing and holding the
upper button enters into a menu or confirms a
setting, while pressing and holding the lower
button exits from a menu and goes up one
level.

During the dive, the upper button modifies the
top row (depth information) whereas the lower
button modifies the lower right corner of the
display. From the main watch display and in
dive mode, press and hold the lower button
(

) to activate the backlight.

An overview of the button function both in
surface mode and during a dive is presented
here below.

PRESS PRESS AND HOLD

WATC H

Scroll down or
decrease by 1

From time of day display:
backlight
From all others:
go back one level

DIVE

Modify bottom row Backlight

PRESS PRESS AND HOLD

WATC H

Scroll up or
increase by 1

Enter a submenu or
confirm a setting

DIVE

Modify top row

Reset stopwatch
(Multigas only:

- Activate gas switch process

- Confirm gas switch)

PRESS PRESS AND HOLD

WATC H

Scroll up or
increase by 1

Enter a submenu or
confirm a setting

DIVE

Modify top row

Reset Stopwatch
(Multigas only:

- Activate gas switch process

- Confirm gas switch)

PRESS PRESS AND HOLD

WATC H

Scroll down or
decrease by 1

From time of day display:
backlight
From all others:
go back one level

DIVE

Modify bottom row Backlight

5

SURFACE MODE

press

press and hold

CHRONO MODE SET LOG PLAN PC INFOPRE-DIVEWATC H

ESC

ENTER

UP

DOWN

UP

DOWN

UP

DOWN

UP

DOWN

UP

DOWN

UP

DOWN

UP

DOWN

UP DOWN UP DOWN UP DOWN UP DOWN

ESC

ENTER

ESC

ENTER

ESC

ENTER

ESC

ENTER

UP

DOWN

UP

DOWN

UP

DOWN

UP

DOWN

UP

DOWN

AIR SET DIVE STATISTICS NO DECO 18m

EAN

SET TIME DIVE 1 NO DECO 21m

BOTTOM TIMER

FREEDIVE

DIVE 2 NO DECO 24m

PC READY

DIVE MODE

press

press and hold

PRE DIVE

Timeout 4”

POST DIVE

Smart Dive Computer

6

1.6. WATCH DISPLAY

The watch display is the “home” display of
Smart. In this mode, the time of day is shown
in the middle row of the display while date,
temperature, seconds, wake-up time and
second time can be displayed at the bottom by
pressing the lower button. When the wake-up
time is displayed, pressing and holding the
upper button turns the wake-up alarm

or

. Note that the temperature reading will be
affected by your body heat while you are
wearing the watch. A growing or diminishing
ring of 60 dots around the perimeter of the
display represents the seconds.

When the second time is displayed, pressing
and holding the upper button switches main
time and second time.

• 2. MENUS, SETTINGS AND

FUNCTIONS

This chapter describes in detail all menus,
setting and functions of the Smart dive
computer.

From the time of day display, pressing the
upper button allows you to scroll through the
following sequence of menus (note that once
inside the menu loop, pressing the lower
button scrolls through the menus in reverse
sequence):

- CHROnO: allows you to operate Smart like a

normal stopwatch;

- PRE dIVE: places Smart in the ready-to-dive

mode;

- MOdE: allows you to set the computer to

air, nitrox, bottom timer mode or free diving
mode (apnea);

- SEt: allows you to view and change all

settings relating to the dive computer (SEt
dIVE) and to the watch (SEt tIME).

- LOG: allows you to access the detailed

history of the dives performed;

- PLAN: allows you to view no deco times as

a function of depth based on your current
nitrogen load;

- PC: allows you to download dives to a PC or

Mac

- INFO: allows you to view information about

software and hardware of your Smart.

The pre-dive mode puts the computer in a
ready-to-dive mode and ensures that Smart

starts to monitor the dive as soon as a depth
of 1.2m/4ft is reached. If you start the dive
without putting Smart into pre-dive mode,
it will start to monitor the dive automatically
but with a delay of up to 20 seconds from
immersion.

The pre-dive display shows p factor and
altitude settings, time of day, surface interval
since the last dive and temperature. If Nitrox
is set, it will show the O

2

percentage and the
corresponding MOD. A small S or F to the left
of the middle row indicates the water type.

NOTE

- If you remain in pre-dive for longer than
3 minutes without pressing any button,
Smart will revert to normal watch function.

- It is recommended to put Smart into pre­dive before submerging. Not doing so
can lead to a delay of up to 20s in Smart
monitoring the dive.

2.1. CHROnO

Press and hold the upper button to enter this
menu. The middle row now features a stopwatch
while the time of day has moved to the bottom
row. Press the upper button to start and stop the
time, then press the lower button to reset the
time to zero. Press and hold the lower button to
exit from the stopwatch function (this stops and
resets the stopwatch if it was running or stopped
at a non-zero value upon exiting).

The stopwatch features also a split-time
function: by pressing the lower button while
the stopwatch is running, the time itself will
freeze while SPL blinks in the top row and the
stopwatch continues in the background. Every
time you press the lower button the split time
will refresh with the new value. Press and hold
the lower button to exit the split-time mode.
Note that while in split-time mode, the upper
button has no function.

2.2. PRE dIVE

Press and hold the upper button to enter this
menu and put Smart into the ready-to-dive
mode.

2.3. MOdE

Here you can define the type of gas you will be
breathing during the dive (air or enriched air
nitrox, including multigas). You can also set
Smart to bottom timer, in which case Smart
will show only time, depth and temperature:
it will not carry out any decompression
calculation and it will not show any warnings
and alarms. You can set Smart also to
freediving mode, which in essence is a bottom
timer with special features dedicated to free
divers.

Press either button to scroll through the four
possible options (AIR, EAN, bottom timer or
FREE), then press and hold the upper button
to select it.

7

AIR is the equivalent of setting EAN to 21%
and a ppO2max of 1.4bar, but simplifies the
display a bit by not showing the CNS (its value
however is calculated in the background and if
needed the 75% warning and the 100% alarm
are triggered).

When selecting EAN, you are taken to
a submenu in which you can define the
percentage of oxygen in the mixture (%O

2

) and
the maximum value of oxygen partial pressure
(ppO

2

max) for up to two breathing mixes. The

maximum possible value for the ppO2max is

1.6bar. Most training agencies recommend not
to exceed a value of 1.4bar.

Once inside this menu, press either button to
change the O2% and observe how this affects
the maximum operating depth (MOD). Then
press and hold the upper button to move on to
the ppO2max and use either button to change
the value, again noticing how this affects the
MOD. Press and hold the upper button again to
save the setting.

This leads you to the G2 OFF screen. Press and
hold the lower button to exit the menu or go to
section 3.5 for information about diving with
more than one gas.



WARNING

- Diving with Nitrox may only be
attempted by experienced divers after
proper training from an internationally
recognized agency.

- Before every dive and after changing
the tank, you must make sure that
the set oxygen concentration in Smart
corresponds to the oxygen concentration
in the tank. Setting the wrong oxygen
concentration can lead to serious injury
or death.

See chapter 3.5 for more information about
diving with more than one gas.

2.4. SEt

Smart’s SEt menu allows you to change
settings. Once inside this menu, press either
button to scroll between two submenus: SEt
dIVE, where you can set parameters pertaining
to the dive, and SEt tIME, where you can set
parameters pertaining to time and date.

Press and hold the upper button to enter a
menu, then press either button to scroll up and
down between available options or to increase
or decrease the value of a setting. Then press
and hold the upper button to confirm the
change in setting. Press and hold the lower
button to go up one level in the menu tree.

MENU Description

SEt dIVE

- LGHt

Allows you to set the duration
after which the backlight
turns off automatically. You
can set this between 1 and 10
seconds.

- P FCt

Allows you to choose between
the standard algorithm (P0)
and an increasingly more
conservative one (P1, P2).

- ALt

Allows you to set the
algorithm into altitude mode
when diving in mountain
lakes.

- WAtR

Allows you to choose
between salt and fresh water.

- UN:tS

Allows you to choose
between metric (m, °C) and
imperial (ft, °F) units

- FASt

Allows you to turn off the dive
violation due to uncontrolled
ascent. This is for dive
instructors only, who may
find themselves in such a
situation because of their
teaching requirements.

- ALRM

Allows you to turn on or off
all audible alarms of Smart.

- ErASE

Allows you to reset the
nitrogen saturation to zero,
thereby erasing the effects
of a previous dive. This is
only for people who plan
to lend their computer to
another diver who has not
performed a dive within the
last 24hours.

- dEEP

Allows you to turn off the
calculation and display of the
deep stop.

SEt tIME

Allows you to set the time
format, time and date, wake­up alarm and second time.

2.4.1. SEt dIVE

2.4.1.1. LGHt (BACKLIGHT)

Smart has a backlight which can be activated
in case of low ambient light. The backlight is
activated by pressing and holding the lower
button. During a dive, the backlight will stay on
for the duration defined in this menu. You can
choose between 1 and 10 seconds.

Smart Dive Computer

8

NOTE

- The backlight consumes battery energy:
the longer the backlight stays on, the
less your battery will last.

- If the low battery warning is activated,
the backlight will be disabled.

In surface mode, the backlight can be activated
by pressing and holding the lower button while
the time of day is displayed. The backlight will
turn off after 6 seconds without any button
operation, which allows you to turn on the
light from the time of day mode then enter into
menus, change settings, go into the logbook etc.

2.4.1.2. P FCt (P FACTOR)

Smart allows you to set an additional personal
safety factor for those circumstances in which
you want to be especially cautious, such
as after a long period of inactivity or when
planning a strenuous dive. In this menu you
can choose between the standard algorithm
(P0), a more conservative version (P2) or
an intermediate one (P1). On the pre-dive,
post-dive, logbook and planner displays, P1
is displayed with p+, P2 with p++ and P0 is
indicated by the absence of symbols.

NOTE

The choice of p factor will be reflected in
the dive planner.

2.4.1.3. ALt (ALTITUDE)

Atmospheric pressure is a function of altitude
and of weather conditions. This is an important
aspect to consider for diving, because the
atmospheric pressure surrounding you has an
influence on uptake and subsequent release
of nitrogen. Above a certain altitude, the
decompression algorithm has to change in
order to account for the effect of the change
in atmospheric pressure. When diving in a
mountain lake, find out what the altitude is and
choose the altitude range in Smart within the
four available options:

- A0: from sea level to approximately
700m/2300ft;

- A1: from approximately 700m/2300ft to
approximately 1500m/4900ft ;

- A2: from approximately 1500m/4900ft to
approximately 2400m/7900ft;

- A3: from approximately 2400m/7900ft to
approximately 3700m/12100ft;

- We do not recommend diving at altitudes
above 3700m / 12100ft. If you do, set Smart
to bottom timer and find appropriate
altitude dive tables.

On the pre-dive, post-dive, logbook and
planner displays, A1 through A3 are indicated
with the mountain symbol filled with 1, 2 or 3
segments while A0 is indicated by the absence
of symbols.



WARNING

Diving in mountain lakes without first
setting Smart to the proper altitude setting
can cause severe injury or death.

2.4.1.4. WAtR (WATER)

You can set the computer for FRESH water or
SALt water calibration, depending on where

you intend to dive. Setting the wrong water
type entails an error in depth measurement
of approx 3% (i.e. at a depth of 30m/100ft, a
computer set to salt water will show 29m/97ft
in fresh water whereas a computer set to fresh
water will show 31m/103ft in salt water). Note
that this does not affect the proper functioning
of the computer, since the computer performs
all of the calculations based purely on
pressure measurements.

2.4.1.5. UN:tS (UNITS)

You can choose between metric (depth in
meters, temperature in °C) and imperial units.
(depth in feet, temperature in °F).

2.4.1.6. FASt (FAST ASCENT)

A fast (uncontrolled) ascent is defined as one in
which a speed of 12 m/min / 40ft/min or higher
was maintained over more than two thirds of
the way up. This applies to dives deeper than
12m/40ft only. In such an event, due to the
potential of harmful bubble formation, Smart
locks the computer for 24hours in order to
discourage you from diving again. In this menu,

you have the option to disable the locking up of
the computer in the event of an uncontrolled
ascent.



WARNING

- An uncontrolled ascent increases your
risk of decompression sickness (DCS)

- This feature is intended for very
experienced divers only, such as dive
instructors, who take full responsibility
for the consequences of turning off this
function.

2.4.1.7. ALRM (ALARMS)

In this menu you can disable audible alarms.



WARNING

Disabling audible alarms can lead you into
potentially dangerous situation and could
result in serious injury or death.

2.4.1.8. ErASE (ERASE DESATURATION)

Smart allows you to reset the desaturation
in the computer. Any tissue saturation
information from a recent dive will be reset to
zero and the computer treats the next dive as
a non-repetitive dive. This is useful when the
computer is loaned to another diver who has
not dived in the last 24hours.



WARNING

Diving after having reset the desaturation
is extremely dangerous and is very likely to
cause serious injury or death. Do not reset
the desaturation unless you have a valid
reason to do so.

In order to prevent accidental desaturation
reset, you must enter the security code once
you decide to proceed with the reset. The
security code is 1234.

After entering the security code you will get a
confirmation of the successful completion of
the operation.

2.4.1.9. dEEP

This menu allows you to turn off the
calculation and display of the deep stop, which
leads to a clearer display of decompression
information in case you are not interested in

9

performing deep stops anyway. See section 3.3
for more information on deep stops.

2.4.2. SEt tIME

This menu allows you to set the time format,
time, date, wake-up alarm and second time

(

). Scroll through the options by pressing
either button. Press and hold the upper button
to edit an option, then press the upper or lower
button to modify the blinking value, then press
and hold the upper to confirm the new setting.

Smart features a “sleep” mode: in case you
don’t wear it other than on a dive trip, you can
put Smart in sleep mode to reduce battery
consumption. To wake up from sleep mode,
press either button.

2.5. LOGBOOK

Smart can record the profiles of approximately
35hours of diving, at a sampling rate of 5
seconds. The information can be transferred
using the optional USB clip to PC via the Dive
Organizer software or to a Mac via the Divers’

Diary software. In addition, Smart can show
most of the information directly on the display.

When you first enter the logbook menu, you
will see a summary of all dives performed to
date. In particular, the maximum depth ever
reached, the total number of dives, the total
number of hours spent underwater and the
coldest water temperature recorded.

From here, press either button to scroll
through all dives in the memory of the
computer. The number to the right of the
middle row while scrolling through dives is the
sequential counter of the logbook (1 being the
most recent dive). Press and hold the upper
button to view the details of a particular dive.
Each dive has three pages of data. Each page
has maximum and average depth at the top,
while the middle row has max ascent rate
and time the dive started on pages 1 and 2,
and max ascent rate and time the dive ended
on page 3. The bottom row contains date of
dive and O

2

% on the first page, dive time and
minimum water temperature on the second
page, and surface interval to previous dive and
CNS at end of dive on the third page.

Press either button to scroll between the
pages of information, press and hold the lower
button to return to the list of the main logbook
menu.

2.6. DIVE PLANNER

This function allows you to scroll through the
no decompression limits, automatically taking
into account the current residual saturation
of the tissue compartments from a preceding
dive. The times shown when scrolling the
no decompression limits take into account
the information entered under the set dive
submenu: water type, altitude, personal
safety factor, Air, or in the case of Nitrox,
the values for the oxygen percentage and its
maximum partial pressure. For each depth,
the display shows the corresponding no deco
time expressed in minutes. If Nitrox mode is
selected, the maximum depth shown in the
planner is limited by the MOD.

NOTE

The dive planner is enabled only if either
air or nitrox mode is set

2.7. PC

This submenu allows you to download your
dive data to a PC or Mac. Press and hold the
upper button and the display will show PC
ready, symbolizing that Smart is ready to
communicate.

2.8. INFO

This submenu provides information about
the hardware and software of your Smart and
about the status of the battery (two segments

Smart Dive Computer

10

inside the battery means the battery is ok,
one segment means the battery is low but
the watch functions as dive computer, one
segment blinking means the battery is too low
for use as dive computer).

• 3. DIVING WITH SMART

3.1. A FEW WORDS ABOUT NITROX

Nitrox is the term used to describe breathing
gases made of oxygen-nitrogen mixes with
an oxygen percentage higher than 21% (air).
Because Nitrox contains less nitrogen than
air, there is less nitrogen loading on the
diver’s body at the same depth as compared to
breathing air.

However, the increase in oxygen concentration
in Nitrox implies an increase in oxygen partial
pressure in the breathing mix at the same
depth. At higher than atmospheric partial
pressures, oxygen can have toxic effects on the
human body. These can be lumped into two
categories:

- Sudden effects due to oxygen partial
pressure over 1.4bar. These are not related
to the length of the exposure to high partial
pressure oxygen, and can vary in terms of the
exact level of partial pressure they happen
at. It is commonly accepted that partial
pressures up to 1.4bar are tolerable, and
several training agencies advocate maximum
oxygen partial pressures up to 1.6bar.

- Long exposure effects to oxygen partial
pressures over 0.5bar due to repeated and/
or long dives. These can affect the central
nervous system, cause damage to lungs or
to other vital organs.

Smart keeps you safe with respect to these two
effects in the following ways (as long as it is
set to either air or nitrox):

• Against sudden effects: Smart has an MOD
alarm set for a user-defined ppO

2

max. As
you enter the oxygen concentration for the
dive, Smart shows you the corresponding
MOD for the defined ppO2max. The default
value of ppO2max from the factory is 1.4bar.
This can be adjusted to your preference
between 1.2 and 1.6bar. Please refer to
section 2.1 for more information on how to
change this setting. If Smart is set to air, the
ppO2max is set to 1.4bar by default.

• Against long exposure effects: Smart
“tracks” the exposure by means of the
CNS% (Central Nervous System). At levels
of 100% and higher there is risk of long
exposure effects, and consequently Smart
will activate an alarm when this level of
CNS% is reached. Smart also warns you
when the CNS level reaches 75%. Note that
the CNS% is independent of the value of
ppO2max set by the user.

3.2. ALARMS

Smart can alert you of potentially dangerous
situations. There are five different alarms:

- Ascent rate alarm;

- Exceeding a safe ppO

2

/MOD;

- CNS =75%;

- Missed decompression stop;

- Low battery during the dive



WARNING

When in bottom timer mode, all warnings
and all alarms are OFF aside for the low
battery alarm.

NOTE

- Alarms are both visual and audible, as
described in detail below.

- Ascent rate alarm has priority over
other alarms if they are triggered
simultaneously.

3.2.1. ASCENT RATE

As soon as depth decreases Smart activates
the ascent rate control algorithm and displays
the calculated value. This is shown to the very
left in the middle row of the display.



WARNING

A rapid ascent increases the risk of
decompression sickness.

If Smart determines an ascent rate of 10m/min/
30ft/min or higher, the fast ascent alarm is
triggered: an audible alarm goes off, and
appears on the display. This persists until the
ascent rate is reduced to 10m/min / 30ft/min
or less.

If the ascent rate exceeds 12m/min / 40ft/min
at a depth below 12m / 40ft,

appears and
the speed value blinks. If a speed in excess of
12m/min / 40ft/min is maintained for two
thirds or more of the depth at which the alarm
was first triggered, Smart considers it a dive
violation and the display will show the steady

symbol.

In this case, if the diver attempts a repetitive
dive after surfacing, Smart will only function as
a depth gauge and timer (bottom timer mode),

and will display

on the screen

throughout the dive.

3.2.2. MOD/ppO

2



WARNING

- The MOD should not be exceeded.
Disregarding the alarm can lead to
serious injury or death.

- Exceeding a ppO

2

of 1.6bar can lead to
sudden convulsions resulting in serious
injury or death.

When the diver reaches a depth at which the
ppO

2

of the inspired gas exceeds the maximum

limit entered in the corresponding setting (from

1.2 to 1.6bar), an audible alarm goes off, the
current depth starts to blink and the value of the
MOD is shown to the right of the current depth.

The alarm persists until the diver has
ascended enough for the ppO2 to return within
the set limit.



WARNING

When the

MOD

alarm is triggered, ascend
immediately until the alarm stops. Failure to
do so could result in serious injury or death

.

3.2.3. CNS = 75%



WARNING

When the CNS reaches 100% there is
danger of oxygen toxicity. Start procedure
to terminate the dive.

Oxygen toxicity exposure is tracked on Smart
by means of the CNS% based on currently
accepted recommendations for exposure limits.
This toxicity is expressed as a percentage
value which ranges from 0% to 100%. When
the value reaches 75%, an alarm goes off and
CNS value blinks on the screen. Additionally
the CNS becomes the default item in the lower
right corner: if you call up other information
such as the temperature or the time of day,
after 8 seconds the CNS appears again. Ascend
to shallower depth to decrease oxygen loading
and consider terminating the dive.

11

When the oxygen toxicity level reaches 100%
the alarm message and the audible signal are
repeated for 5 seconds in one-minute intervals
after the first occurrence and for as long as the
value of CNS stays at or above 100%. Consider
terminating the dive immediately!



WARNING

Diving with oxygen toxicity at levels of 75%
or greater may put you into a potentially
hazardous situation, which could result in
serious injury or death.

3.2.4. MISSED DECOMPRESSION STOP



WARNING

Violating a mandatory decompression
obligation may result in serious injury or
death.

If you ascend above the decompression stop
depth by more than 0.3m (1ft), a downward
pointing triangle appears, an audible alarm
goes off and both the current depth and the
depth of the deco stop start blinking. This
alarm remains active until you return to the
correct depth.



WARNING

- When the missed deco stop alarm is
triggered, desaturation of the simulated
tissue compartments is halted and
resumes only when the diver returns to
the correct stop depth.

- Never ascend above the displayed
decompression stop depth.

3.2.4.1. MISSED DECO STOP MODE

If the stop depth is exceeded by more than 1m
(3ft) for more than three minutes, Smart
considers it a dive violation and the display will

show

.

In this case, if the diver attempts a repetitive
dive after surfacing, Smart will function only as
a depth gauge and timer (bottom timer mode),

and it will display

on the screen.

3.2.5. LOW BATTERY

If Smart detects that the battery power level is
safe for diving but without much reserve left,
it will show the steady battery symbol on the
display and the backlight will be disabled. If
the level of the battery decreases to the point
of making it unsafe to dive, the battery symbol
starts blinking.

NOTE

The behavior of the battery is strongly
influenced by temperature. It is therefore
possible for the battery alarm to appear
and to subsequently disappear again for a
long time.



WARNING

When the blinking battery symbol appears,
you should stop the dive, safely, without
delay.



WARNING

When the blinking battery appears in watch
mode, Smart will not function as a dive
computer.

3.3. DISPLAY INFORMATION

Upon immersion, if Smart was set to pre­dive, it will immediately start monitoring the
dive. Otherwise, it will turn on automatically
within 20 seconds of having reached a depth of

1.2m/4ft.

The following information is shown:

- current depth

- max depth

- no deco time (or depth and duration of
deepest stop and total ascent time in case of
decompression dives)

- dive time

- temperature

- nitrogen saturation bar graph

By pressing the upper button, you can modify
the information displayed in the top row. At
each button press, the screen cycles through
max depth, average depth, MOD (nitrox only)
and an empty field.

By pressing the lower button, you can modifiy
the information displayed in the bottom row. At
each button press, the screen cycles through
temperature, oxygen percentage, CNS,
stopwatch (in lieu of the dive time) and time
of day (in lieu of the dive time; the latter has a
4-second time out after which the dive time is
displayed again). To reset the stopwatch, press
and hold the upper button while the stopwatch
is displayed.

The depth is given in 10cm resolution until

99.9 meters, after which it is given in 1m

resolution. When the depth is displayed in
feet, the resolution is always 1 foot. At a depth
shallower than 1.2m/4ft, the display shows ---.
Maximum possible depth is 150m/492ft.

The dive time is displayed in minutes. If during
the dive you ascend to the surface, the time
spent on the surface will only be counted
if you descend again below 1.2m/4ft within
3 minutes. This allows for brief periods of
orientation. While on the surface, the time will
not show as progressing but it is running in
the background. As soon as you submerge, the
time will resume, including the time spent on
the surface.

The no deco time is calculated in real time
and updated continuously. Maximum displayed
no deco time is 999 minutes. If you remain at
depth beyond a no deco time of zero minutes,
you will enter into decompression: you can no
longer make a direct ascent to the surface and
Smart displays a MANDATORY decompression
stop. Instead of a no deco time, it shows you
the depth and duration of the deepest stop and
the total ascent time (ASC), which includes
each decompression stop and the time
required to travel the vertical distance to the
surface at a rate of 10m/min / 33ft/min. ASC
includes the duration of deep stops as well.

DEEP, DECO and SAFETY stops:

- A SAFETY stop is generated as soon as the
depth of the dive exceeds 10m / 33ft. It has
a duration of 3 minutes and it is carried
out between depths of 6m / 20ft and 3m /
10ft at the end of a dive prior to surfacing.
Such stop is NOT mandatory but HIGHLY
RECOMMENDED.

Smart Dive Computer

12

- DECO stops are generated progressively
as you stay down beyond the no deco time.
DECO stops are MANDATORY.

- DEEP stops are generated as you approach
the no deco limit. You can either have one
2-minute stop or two 1-minute stops. DEEP
stops are NOT mandatory. Deep stops are
indicated to the left of the no deco time or
as first (deepest) stop of a deco dive. You
can turn off the deep stops in the SET DIVE/
DEEP menu in which case no deep stop is
calculated nor displayed.



WARNING

During all dives, perform a safety stop
between 3 and 6 meters/10 and 20 feet for
3 minutes, even if no decompression stop
is required.

Upon reaching the optimum range for carrying
out a deep stop (+/- 1m /3ft of the displayed
depth) or safety stop (between 6m/20ft and
3m/10ft), a countdown timer appears to
indicate the progress of the stop.

For DECO stops, since the duration is a
function of the exact depth, only the minutes
are shown.

During a decompression stop, the following
symbols may appear:

: optimal range for the decompression

stop;

: above decompression stop depth,

descend immediately!

The nitrogen bar graph is on the right side of
the display. It represents nitrogen saturation in
the leading tissue compartment. The bar graph
is made of six segments, which gradually fill
during the dive. The more black segments
you see, the closer to the no deco limits you
are. As you enter a situation of mandatory
decompression stop, all segments will be
black.

During a surface interval, the segments
will gradually turn off as Smart tracks the
offgassing of your tissues.

Ascent/descent rate: in presence of a
depth change in excess of 80cm / 3ft, Smart
calculates the corresponding ascent or
descent speed and displays it at the very left of
the middle row of the display, for the duration
of the ascent or descent both numerically in
m/min or ft/min and graphically with a series
of dots, each dot representing 2m/min or 6ft/
min.

3.4. AFTER THE DIVE

Upon returning to the surface, Smart first
goes into the so-called surfacing mode. This
mode allows you to resume your dive after a
brief period of orientation. The screen shows a
3-minute countdown.

If you submerge again before the 3-minute
countdown is over, the dive time will resume
from where it left off, including the time spent
on the surface. If you do not submerge before
the end of the countdown, Smart considers the
dive finished, records the data to the logbook
and reverts to the so-called post-dive mode.

The post-dive screen shows the following
information:

- The remaining desaturation time (DESAT):
this is calculated by the decompression
model in the computer. Any dive started
while there is remaining desaturation on
your computer is considered a repetitive
dive, meaning that Smart accounts for the
pre-existing nitrogen load in your body.

- The no-fly time (NO-FLY TIME): this is
the time during which an exposure to
the reduced pressure inside the cabin of
an airplane could cause decompression
sickness. Smart employs, as recommended
by NOAA, DAN and other agencies, a
standard 12-hour (no-deco non-repetitive
dives) or 24-hour (deco and repetitive dives)

countdown. There are two special cases:

- if the DESAT TIME is longer than the
NOFLY TIME, Smart automatically sets
the NO-FLY TIME to be equal to the DESAT
TIME;

- the DESAT TIME could be shorter than the
NO-FLY TIME, which would imply that you
cannot fly although you are desaturated.
This is simply the consequence of the
desaturation time being calculated by the
algorithm based on the actual dive profile,
while the no-fly time is an accepted
standard in the diving industry. Since the
real effect of flying after diving has never
been fully investigated, this approach fits
with our philosophy.



WARNING

Flying while Smart displays

can result

in serious injury or death.

- The surface interval (SURF INT): this is
displayed from the moment the dive is
closed (3 minutes after surfacing) for as
long as there is remaining desaturation or
no-fly time on the computer.

- In case of a dive violation, the corresponding
symbol (

, ) is shown.

In addition, the bar graph shows the calculated
nitrogen load in the leading tissue. You can use
this to gauge your progress in getting rid of
nitrogen as the surface interval grows. Smart
continues to perform decompression-related
calculations (nitrogen release), for as long as
there is desaturation time left.

3.5. DIVING WITH MORE THAN ONE

GAS MIXTURE



WARNING

- Diving with more than one gas mixture
represents a much higher risk than
diving with a single gas mixture, and
mistakes by the diver may lead to
serious injury or death.

- During dives with more than one gas
mixture, always make sure you are
breathing from the tank that you intend
to breathe from. Breathing from a high
oxygen concentration mix at the wrong
depth can kill you instantly.

- Mark all your regulators and tanks so
that you cannot confuse them under any
circumstance.

- Before each dive and after changing
a tank, ensure that each gas mixture
is set to the correct value for the
corresponding tank.

Smart enables you to use two gas mixtures
during the dive (air and Nitrox only). The two
mixtures are labeled G1 and G2 and must be in
ascending order of oxygen content, i.e. G1 has
the lowest oxygen concentration, and G2 has
the highest oxygen concentration.



WARNING

It is not possible to switch to a gas at a
depth at which the oxygen partial pressure
for that gas is greater than the set
maximum value.

13

NOTE

The MOD for G2 is the switch depth for
the corresponding gas. This is what
Smart uses for its calculation, alarms and
suggested switch points.

3.5.1. SETTING MORE THAN ONE GAS

The characteristics of the gases must be
entered in the computer before the dive. It will
then be your responsibility to tell Smart which
gas is currently being used during the various
phases of the dive.

To use multiple gases, you will need to enable
the gases and set the oxygen percentage and
the ppO

2

max for each one. Keep in mind that
the MOD for G2 is the depth at which Smart
will prompt you to perform the gas switch (see
section 3.5.2 below).To enable G2, press the
upper button when G2 OFF is displayed and
it will change to G2 ON. Now press and hold
to confirm it. This will lead you to a display in
which you can set the O

2

% and ppO2/MOD for

G2 in a manner completely similar to G1.

3.5.2. SWITCHING GAS

Smart always begins the dive with G1, which
has the lowest percentage of oxygen. When
during the ascent you reach the depth
corresponding to the MOD of G2, Smart sounds
an audible signal and the oxygen concentration
of G1 starts to blink in the lower right corner.

Press the upper button while this indication is
blinking to initiate the gas switch: the oxygen
percentage of G2 starts to blink in lieu of that
of G1, and in the top right corner the letters
MOD and the value of the MOD for G2 appear,
blinking.

Press and hold the upper button to confirm
the switch to G2, or press the lower button to
cancel the gas switch and stay with G1. In both
cases the set oxygen concentration will be
displayed steadily in the lower right corner of
the screen, and within 20 seconds the ascent
time is updated to reflect the higher oxygen
concentration in the breathing gas.

NOTE

- Smart will allow the change only if
the depth is shallower than the MOD
corresponding to the set ppO2max.

- Smart will not allow the gas switch if you
are deeper.

- The automatic blinking of the oxygen
concentration of G1 lasts only for 20
seconds. You can however initiate the
gas switch at any time by pressing and
holding the upper button when the
oxygen concentration is displayed in the
lower right corner, then switch to G2 as
long as your depth allows the gas to be
activated.

3.5.3. SPECIAL SITUATIONS

3.5.3.1. SWITCHING BACK TO A GAS MIXTURE
WITH LOWER OXYGEN CONCENTRATION

There may be situations in which you have
to switch back to a gas with lower oxygen
concentration than what you are currently
breathing. This can happen for instance if you
want to descend deeper than the MOD for the
current gas, or if for instance you have run
out of gas in G2 during the decompression. To
do so, simply press the lower button until the
oxygen concentration is displayed in the lower
right corner, then press and hold the upper
button to initiate the gas switch. From here on
the procedure is the same as described in 3.5.2.

3.5.3.2. SUBMERGING BELOW THE MOD
AFTER A GAS SWITCH

If after having switched to a gas mixture with a
higher oxygen concentration you inadvertently
drop again below the MOD for that mixture,

the MOD alarm will immediately go off. Either
switch back to a gas mixture suited for that
depth, or ascend above the MOD for the gas
mixture you are breathing from.

3.6. BOTTOM TIMER MODE

When Smart is set to bottom timer mode, it
will only monitor depth, time and temperature,
and will not carry out any decompression
calculation. Maximum displayed dive time
in gauge mode is 999 minutes. You can only
switch to bottom timer mode if the computer is
completely desaturated. All audible and visual
alarms, other than the low battery alarm, are
turned off.



WARNING

Dives in bottom timer mode are performed
at your own risk. After a dive in bottom timer
mode you must wait at least 24hours before
diving using a decompression computer.

During a dive in bottom timer mode, the
following information is displayed:

- current depth

- max depth

- stopwatch

- dive time

- temperature

- in case of an ascent: ascent speed
(in m/min or ft/min).

Press the upper button to toggle between max
depth, average depth and an empty field. Press
the lower button to bring up the time of day in
lieu of the dive time (the display reverts back
to dive time after 4 seconds).
While the average depth is displayed, pressing
and holding the upper button resets the average
depth.

From any other display, press and hold the
upper button to restart the stopwatch.

Smart Dive Computer

14

3.6.1. DIVE VIOLATION INDUCED BOTTOM
TIMER MODE

The following violations can occur during an
Air or Nitrox dive:

- Uncontrolled ascent.

- Missed deco stop.
In case of a violation, Smart will restrict the
use of Air and Nitrox mode for 24hours, and
will only allow operation in bottom timer mode.

3.7. FREE DIVE MODE

Smart features a free diving mode with
dedicated features specifically for breath hold
divers. In free diving, we differentiate between
immersion and dive session. An immersion
is the individual trip below the water surface.
The dive session is a group of immersions
performed in sequence without exiting the free
dive mode.



WARNING

The practice of free diving exposes divers
to different hazards from those associated
with scuba diving. The diver should be
aware of these hazards and understand
how to avoid them.



WARNING

Do not practice free diving within 24 hours
of having performed a scuba dive.

3.7.1. SETTINGS

Go into the MODE menu and from here select
FREE then press and hold the upper button to
confirm your choice. This will automatically
lead you into the settings menu for free diving.
Press and hold the lower button to exit if you
don’t need to change any of the settings. Else
scroll through the available settings pressing
either button. To edit a setting, press and hold
the upper button, then press either button to
modify the setting, then press and hold the
upper button again to confirm the change. The
available settings are:

AL.beep

This allows you activate or deactivate all
warnings at once.

Dive time

If active, when the dive time reaches the set
limit an audible alarm will go off and the dive
time will blink on the display.

Surf int

If active, when the surface interval reaches the
set limit an audible alarm will go off and the
surface interval will blink on the display.

Max

If active, upon reaching the depth defined in
the setting an audible alarm will go off and the
depth will blink on the display.

Int

This allows you to set a depth interval at which
a short audible sequence is activated. For
instance, if you set a depth interval of 5m/15ft,
the audible sequence will go off at 5m/15ft,
10m/30ft, 15m/45ft etc.

3.7.2. USING SMART ON A FREE DIVE

Put Smart into PRE DIVE so that as soon
as you submerge past 1.2m/4ft it will start
monitoring your dive. Smart will show the
current depth in the top row, the dive time in
minutes and seconds in the middle row and
the water temperature in the bottom row.
Press the lower button and the time of day
will appear for a few seconds to the left of the
temperature. Press and hold the lower button
to activate the backlight.

3.7.2.1. SURFACING BETWEEN IMMERSIONS

When returning to a depth of less than

0.8m/3ft, Smart switches to surface mode.

The display will show the maximum depth
of the dive that just ended in the top row, its
duration in the middle row, and the surface
time in minutes and seconds in the bottom
row together with the minimum temperature
recorded during the immersion. The number
to the right of the max depth is the sequential
counter of the immersions in the dive
sequence.

By pressing the upper button the display
switches to maximum depth of the dive
session in the top row, maximum dive time of
the session in the middle row and minimum
temperature during the session in the bottom
row.

Press and hold the upper button to exit free
dive mode. Do this only at the end of your
dive session so that your immersions are
all logged together (see section 3.7.3 for
information about the logbook in free dive
mode). Note that Smart will exit the free dive
mode automatically after 10 minutes without
immersion.

3.7.3. LOGBOOK IN FREE DIVE MODE

Smart separates scuba dive logs from free dive
logs, hence there is a dedicated summary page
for each. As you enter the logbook function, the
two alternate every 4 seconds. The free dive
summary shows max depth in the top row,
longest dive time in the middle row, number
of sessions and minimum temperature in the
bottom row.

Upon pressing the upper button, individual
logs will be shown in chronological sequence.
Scuba dives are described in section 2.5. Free
dives are grouped in sessions, and for each
session there are two summary pages: the

15

first shows the maximum depth of the session,
the time the session started and the date, in
addition to a sequential counter;

Press and hold the upper button to reach
the second summary page, which shows
the maximum depth and the number of
immersions of the session in the top row, the
time the session started and the sequential
counter in the middle row, the longest dive
time and the minimum temperature of the
session in the bottom row.

Press and hold the upper button to enter the
session and see max depth and sequential
counter of the immersion at the top, dive
time in the middle, surface interval prior to
immersion and minimum temperature of the
immersion at the bottom.

Press either button to view the details of other
immersions within the same session or press
and hold the lower button to exit the session log.

• 4. TAKING CARE OF SMART

4.1. TECHNICAL INFORMATION

Operating altitude:

- with decompression – sea level to
approximately 3700m/12100ft

- without decompression (gauge mode) – at
any altitude

Decompression model: RGBM Mares-Wienke
(10 tissues)

Depth measurement:

- Max displayed depth: 150m/492ft

- Resolution: 0.1m until 99.9m and 1m at
depth deeper than 100m. Resolution in ft is
always 1ft

- Temperature compensation of the
measurement between -10 °C to +50 °C /
14°F to 122 °F

- Accuracy from 0 to 80m/262ft: 1% ±0.2m/1ft

Temperature measurement:

- Measurement range: -10 °C to +50 °C /
14°F to 122 °F

- Resolution: 1 °C / 1 °F

- Accuracy: ± 2 °C / ± 4 °F

Clock: quartz clock, time, date, dive time
display up to 999 minutes

Oxygen concentration: adjustable between
21% and 99%, ppO

2

max range between 1.2 and

1.6bar

Logbook memory: 35hours of dive profile at
5-second sampling rate

Operating temperature: -10 °C to +50 °C /
14°F to 122 °F

Storage temperature: -20 to 70 °C / -4 to 158°F

Display:

- Diagonal: 31mm / 1 ¼ inch

- Mineral glass

Power supply:

- CR2430 user-replaceable battery

- battery life: 800-1000 dives in one year,
200-300 dives over two years, 50 dives over
3 years. If sleep mode is activated between
dive sessions, 300 dives over 6 years. Actual
battery duration depends on the usage of
the backlight and the water temperature.

4.2. MAINTENANCE

The depth accuracy should be verified by an
authorized Mares dealer every two years Aside
from that, Smart is virtually maintenance free.
All you need to do is rinse it carefully with
fresh water after each dive (avoid any chemical
products) and replace the battery when
needed. To avoid possible problems with your
Smart, the following recommendations will
help assure years of trouble free service:

- avoid dropping or jarring your Smart;

- do not expose Smart to intense, direct
sunlight;

- do not store Smart in a sealed container,
always ensure free ventilation.

NOTE

If you notice signs of moisture on the
inner wall of the mineral glass, take your
Smart immediately to an authorized Mares
service center.



WARNING

The mineral glass is not exempt from
scratches resulting from improper use.



WARNING

Do not blow compressed air onto Smart,
because it could damage the pressure
sensor area.

4.2.1. REPLACING THE BATTERY IN SMART

Replacing the battery is a delicate operation,
and requires close attention. We suggest that
you visit an authorized Mares center. Mares
declines all responsibility for any damage
caused by replacing the battery.

NOTE

Do not discard the old battery in the
environment. Mares adopts a policy of respect
for the environment, and urges use of the
appropriate separated waste collection service.



WARNING

When changing the battery, the o-ring
must be replaced. The Smart battery kit PN
44201158 contains a high quality CR2430
battery and a new o-ring. All computer
o-rings are inspected individually for
integrity.

Follow these steps and refer to the pictures:

a) Remove the center screw as shown, then

remove the strap. Note that only side of the
strap needs to be removed. We recommend
removing the one without buckle.

b) Remove the two screws near the padlock

symbols. These hold the battery cover in
place.

NOTE

Do not remove the screws denoted with !

c) Use a small flat-head screwdriver to pry

open and lift the cover on the side where you
removed the strap.

Smart Dive Computer

16

d) Remove the cover then remove the o-ring.

Discard the o-ring.

e) Remove the battery by prying it loose with a

small flat-head screwdriver.

f) Replace the battery with the new one from

the kit. The battery should click in place.
Make sure to respect the correct polarity
of the battery: the “+” has to be facing
outwards.

CLICK

g) Position the new o-ring from the kit in the

groove around the battery, ensuring that it
sits towards the outer edge of the groove.

h) Position the cover onto the watch case and

press it down evenly. Ensure that in the area
of the screws the cover touches the watch
case.

NOTE

Do not lubricate the o-ring! Lubrication
causes the o-ring to twist when the cover is
put over it, causing the watch to flood.

i) Keep the cover pressed onto the watch case

while hand tightening the two screws. Don’t
use excessive force while tightening. Ideal
torque is 12 N cm / 17 oz-in.

j) Reposition the strap which was removed in

step a). For best results put a drop of Loctite
222 onto the thread of the screw. Hand
tighten without using excessive force. Ideal
torque is 25 N cm / 35 oz-in.



WARNING

Mares reserves the right to refuse to
provide service under the warranty if the
maintenance instructions are not followed.

4.3. WARRANTY

Mares products are guaranteed for a period of
two years subject to the following limitations
and conditions:

The warranty is non-transferable and applies
strictly to the original purchaser.

Mares products are warranted free from
defects in materials and workmanship:
components that, upon technical inspection,
are found to be defective, will be replaced free
of charge.

Mares S.p.A. declines all responsibility
for accidents of any kind that result from
tampering or incorrect use of its products.

Any products returned for overhaul or repairs
under warranty, or for any other reason, must
be forwarded exclusively via the vendor and
accompanied with a proof of purchase slip.
Products travel at the risk of the sender.

4.4. WARRANTY EXCLUSIONS

Damage caused by water seepage resulting
from improper use (e.g. dirty seal, battery
compartment closed incorrectly, etc.).

Rupture or scratching of the case, glass or
strap as a result of violent impact or blows.

Damage resulting from excessive exposure to
elevated or low temperatures.

Damage caused by the use of compressed air
to clean the dive computer.

4.5. HOW TO FIND THE PRODUCT
SERIAL NUMBER

To see the product serial number, enter the
INFO submenu.

• 5. DISPOSAL OF THE DEVICE

Dispose of this device as electronic waste. Do
not throw it away with regular rubbish.

If you prefer, you can return the device to your
local Mares dealer.

17

Mares S.p.A. - Salita Bonsen, 4 - 16035 Rapallo (Ge) - ITALY - Tel. [phone] - Fax [phone]

www.mares.com

code 44201146 - 0.000- 05/14 - Artbook 10469/14

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