Index .................................................................................................. 89
4
1 SAFETY
Types of safety precautions
WARNING: - is used in connection with a procedure or situation
that may result in serious injury or death.
CAUTION: - is used in connection with a procedure or situation
that will result in damage to the product.
NOTE: - is used to emphasize important information.
TIP: - is used for extra tips on how to utilize the features and
functions of the device.
Before you dive
Make sure that you fully understand the use, displays and
limitations of your dive instruments. If you have any questions
about this manual or the dive computer, contact your Suunto dealer
before diving with the dive computer. Always remember that YOU
ARE RESPONSIBLE FOR YOUR OWN SAFETY!
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Safety precautions
WARNING: ONLY TRAINED DIVERS SHOULD USE A DIVE
COMPUTER! Insufficient training for any kind of diving, including
freediving, may cause a diver to commit errors, such as incorrect use
of gas mixtures or improper decompression, that may lead to
serious injury or death.
WARNING: You must read the printed quick guide and online
user guide for your dive computer. Failure to do so may lead to
improper use, serious injury or death.
WARNING: THERE IS ALWAYS A RISK OF DECOMPRESSION
SICKNESS (DCS) FOR ANY DIVE PROFILE EVEN IF YOU FOLLOW THE
DIVE PLAN PRESCRIBED BY DIVE TABLES OR A DIVE COMPUTER. NO
PROCEDURE, DIVE COMPUTER OR DIVE TABLE WILL PREVENT THE
POSSIBILITY OF DCS OR OXYGEN TOXICITY! An individual’s
physiological make up can vary from day to day. The dive computer
cannot account for these variations. You are strongly advised to
remain well within the exposure limits provided by the instrument
to minimize the risk of DCS. As an added measure of safety, you
should consult a physician regarding your fitness before diving.
WARNING: If you have a pacemaker, we recommend you do not
scuba dive. Scuba diving creates physical stresses on the body which
may not be suitable for pacemakers.
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WARNING: If you have a pacemaker, consult a doctor before
using this device. The inductive frequency used by the device may
interfere with pacemakers.
WARNING: Allergic reactions or skin irritations may occur when
product is in contact with skin, even though our products comply
with industry standards. In such event, stop use immediately and
consult a doctor.
WARNING: Not for professional use! Suunto dive computers are
intended for recreational use only. The demands of commercial or
professional diving may expose the diver to depths and conditions
that tend to increase the risk of decompression sickness (DCS).
Therefore, Suunto strongly recommends that the device not be used
for any commercial or professional diving activities.
WARNING: USE BACKUP INSTRUMENTS! Ensure that you use
backup instrumentation, including a depth gauge, submersible
pressure gauge, timer or watch, and have access to decompression
tables whenever diving with a dive computer.
WARNING:
For safety reasons, you should never dive alone. Dive
with a designated buddy. You should also stay with others for an
extended time after a dive as the onset of possible DCS may be
delayed or triggered by surface activities.
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WARNING: PERFORM PRE-CHECKS! Always check that your dive
computer is functioning properly and has the correct settings
before diving. Check that the display is working, the battery level is
OK, tank pressure is correct, and so forth.
WARNING: Check your dive computer regularly during a dive. If
there is any apparent malfunction, abort the dive immediately and
safely return to the surface.
WARNING: THE DIVE COMPUTER SHOULD NEVER BE TRADED OR
SHARED BETWEEN USERS WHILE IT IS IN OPERATION! Its
information will not apply to someone who has not been wearing it
throughout a dive, or sequence of repetitive dives. Its dive profiles
must match that of the user. If it is left on the surface during any
dive, the dive computer will give inaccurate information for
subsequent dives. No dive computer can take into account dives
made without the computer. Thus, any diving activity up to four
days prior to initial use of the computer may cause misleading
information and must be avoided.
WARNING: DO NOT EXPOSE ANY PART OF YOUR DIVE
COMPUTER TO ANY GAS MIX CONTAINING MORE THAN 40%
OXYGEN! Enriched air with greater oxygen content presents a risk
of fire or explosion and serious injury or death.
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WARNING: DO NOT DIVE WITH A GAS IF YOU HAVE NOT
PERSONALLY VERIFIED ITS CONTENTS AND ENTERED THE
ANALYZED VALUE INTO YOUR DIVE COMPUTER! Failure to verify
tank contents and enter the appropriate gas values where
applicable into your dive computer will result in incorrect dive
planning information.
WARNING: Using a dive planner software such as in Suunto DM5
is not a substitute for proper dive training. Diving with mixed gases
has dangers that are not familiar to divers diving with air. To dive
with Trimix, Triox, Heliox and Nitrox or all of them, divers must
have specialized training for the type of diving they are doing.
WARNING: Do not use Suunto USB Cable in areas where
flammable gases are present. Doing so may cause an explosion.
WARNING:
Do not disassemble or remodel Suunto USB Cable in
any way. Doing so may cause an electric shock or fire.
WARNING: Do not use Suunto USB cable if cable or parts are
damaged.
CAUTION:
DO NOT allow the connector pins of the USB cable to
touch any conductive surface. This may short circuit the cable,
making it unusable.
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Emergency ascents
In the unlikely event that the dive computer malfunctions during a
dive, follow the emergency procedures provided by your certified
dive training agency to immediately and safely ascend.
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2 GETTING STARTED
DIVE PLAN MEM
12:00
1.12
TH
12:00
1.12
TH
2.1 Display states and views
Suunto DX has four main modes: TIME, DIVE, PLANNING and
MEMORY. Change modes by pressing [MODE].
Unless DIVE mode is turned off, Suunto DX automatically switches
to DIVE mode if you are more than 1.2 m (4 ft) under water.
Time and dive modes have different views in the bottom row which
you can scroll through with [DOWN] and [UP].
2.2 Icons
Suunto DX uses the following icons:
11
4.
3.
9.
10.
2.
1.
7.
5.
6.
8.
IconDescription
1Daily alarm
2Dive alarm
3No-fly
4Safety stop
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IconDescription
5Tank pressure (if available)
6Wireless transmission (if available)
7Low battery
8Active water contact
9Diver attention symbol
10Ascent rate
2.3 Set up
To get the most out of your Suunto DX, take some time to read this
manual and familiarize yourself with the modes and settings. Make
absolutely sure you have it set up as you want before getting into
the water.
To get started:
1. Wake up the device by keeping any button pressed until the
display turns on.
2.
Keep [DOWN] pressed to enter General Settings.
3. Set time. See
4. Set date. See
5. Set units. See
6. Press [MODE] to exit settings.
The default dive mode is Air. For more information on dive modes,
3.11 Dive modes
see
3.6.1 Time
3.6.2 Date
3.6.3 Units
.
.
.
.
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2.4 Software version check
Please note that this user guide is for the latest software version of
Suunto DX. If you have an older version, some features operate
differently.
To check the software version:
1. Keep [DOWN] pressed to enter settings.
2.
Press [DOWN] to scroll to Version and enter with [SELECT].
3. The first line of information indicates the software version.
•
If the version number is V1.5.x or higher, you can skip the
rest of this section and read the user guide as normal.
•
If the version number is V1.2.x please read the sections below
regarding how to use specific features.
4. Press [MODE] twice to exit settings.
NOTE: When you send your watch to an authorized Suunto
service center for a battery change or other servicing, the software
will be updated to the latest version.
Dive modes
Each time you enter dive mode, you have the option of selecting
which mode to use.
To change dive modes:
1. While in time mode, press [MODE] to enter dive mode.
2. Scroll to the dive mode you want to use with [UP] or [DOWN].
3. Wait for the pre-checks to complete.
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To change settings for a dive mode, keep [DOWN] pressed while in
that mode. For further information about dive mode settings,
please refer to the respective dive mode section of this user guide.
Stopwatch
Access the stopwatch in time or dive mode as explained in
3.21 Stopwatch
To use the stopwatch:
1. Press [DOWN] to start the stopwatch.
2. While the stopwatch is running, press [DOWN] to take split
times.
3. Press [UP] to stop the stopwatch.
4. Keep [UP] pressed to reset the stopwatch.
.
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3 FEATURES
3.1 Activation and pre-checks
Unless the dive mode turned off, the dive mode activates
automatically when you dive deeper than 1.2 m (4 ft). However, you
should switch to dive mode before diving to check altitude and
personal settings, battery condition and so on.
Each time your Suunto DX enters dive mode, a series of automatic
checks are performed. All graphical display elements are turned ON,
and the backlight and the beep are activated. After this, your
altitude and personal settings are displayed along with the
maximum operating depth (MOD), gas content, and PO2 values.
Then the battery level is checked.
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12:00
1.12
TH
DIVE
Air
66.2m
PO
AO
211.6
Battery
OK
Between consecutive dives, the automatic checks also show current
66.2m
PO
AO
21
1.6
tissue saturation.
Before leaving on a dive trip, it is highly recommended that you
switch to dive mode to make sure everything is functioning
properly.
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After the automatic checks, Suunto DX enters surface mode. At this
point, you should perform your manual checks before entering the
water.
Ensure that:
1. Suunto DX is in the correct mode and provides complete
displays.
2. Altitude setting is correct.
3. Personal setting is correct.
4. Deepstops are set correctly.
5. Unit system is correct.
6. Correct temperature and depth are shown.
7. The alarm beeps.
3.1.1 Wireless Transmitter pre-check
If the optional wireless tank pressure transmitter is used, check that:
1. Tank gas and O2 settings are correct.
2. The transmitter is properly installed and the tank valve is open.
3. The transmitter and Suunto DX are paired.
4. The transmitter is sending data (wireless transmission icon blinks,
tank pressure is displayed).
5. There is no transmitter low battery warning.
6. There is enough air for your planned dive. Check the pressure
reading against your back-up pressure gauge.
3.1.2 Battery indicators
Temperature or internal oxidation can affect the battery voltage. If
you store your Suunto DX for a long period or use it in cold
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temperatures, the low battery warning may appear even though
Replace
Battery
Battery
Low
12:00
1.12
TH
the battery has enough capacity.
In these cases, re-enter dive mode and check the battery power. If
the battery is low, the Low Battery warning comes on.
If the low battery icon appears in surface mode, or if the display
looks faded, the battery may be too low. Battery replacement is
recommended.
NOTE:
For safety reasons, the backlight and buzzer (sound)
cannot be activated when the low battery warning is displayed.
3.2 Alarms, warnings and notifications
Suunto DX has audible and visual alarms designed to let you know
when important limits or presets are being reached.
The two audible alarm types indicating high or low priority:
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Alarm typeSound patternDuration
High priority
Low priority
In addition, there are two audible guidance notifications:
2.4 s sound + 2.4 s
break
0.8 s sound + 3.2 s
break
Instructional
beep
AscendingStart ascending
DescendingStart descending
Suunto DX displays information during the alarm breaks in order to
save battery life.
High priority alarms:
AlarmExplanation
High priority alarm
followed by 'Start
ascending' beep,
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Sound patternInterpretation
PO2 value greater than the adjusted
value. Current depth is too deep for
the gas in use. You should immediately
ascend or change to a lower O2% gas.
AlarmExplanation
repeated for maximum
three minutes
PO2 value blinks
High priority alarm
followed by 'Change gas'
beep, sounded two
times.
PO2 value blinks
High priority alarm
followed by 'Start
descending' beep,
repeated for maximum
three minutes Er blinks
and an arrow points
downwards.
High priority alarm,
repeated three times.
SLOW blinks.
Low priority alarms:
PO2 value is smaller than 0.18 bar
(Mixed or CCR mode only). The depth
is too shallow and the ambient
pressure is too low for the current gas.
The oxygen content is too low; you
may lose conscious. You should
immediately switch the gas.
Decompression ceiling depth
exceeded. You should immediately
descend to, or below, the ceiling.
Maximum ascent rate of 10 m/min (33
ft/min) exceeded. Slow down your
ascent rate.
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Alarm typeAlarm reason
Low priority alarm
followed by 'Start
ascending' beep,
sounded two times.
ASC TIME blinks and an
arrow points upwards.
Low priority alarm
followed by Change gas'
beep. The gas mix
percentage value blinks.
Low priority alarm
followed by "Change
gas" beep, sounded
once. The backlight is lit
and text "Set Point
selected is displayed
shortly.
Low priority alarm
followed by 'Start
descending' beep.
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No-decompression dive becomes a
decompression stop dive. Depth is
below the decompression floor level.
You should ascend to, or above, the
floor.
Gas change is recommended (Mixed or
CCR mode only). You should change to
a gas more favorable to
decompression. Ascent time
calculation assumes that the gas is
changed and is therefore only accurate
if you have changed the gas
accordingly.
The setpoint has been switched
automatically upon reaching the
defined depth (CCR mode only).
Mandatory deepstop violated. You
should descend to complete the
deepstop.
Alarm typeAlarm reason
DEEPSTOP blinks and an
arrow points
downwards.
Low priority alarm
followed by 'Start
descending' beep,
repeated for three
minutes.
An arrow points
downwards.
Low priority alarm
followed by two short
beeps.
DEEPSTOP and timer
displayed.
Low priority alarm,
repeated twice.
Tank pressure value
blinks.
Low priority alarm,
repeated twice.
Mandatory safety stop violated. You
should descend to complete the safety
stop.
Deepstop depth reached. Make the
mandatory deepstop for the duration
shown by the timer.
Tank pressure reaches the defined
alarm pressure or the fixed alarm
pressure, 50 bar (700 psi).
Acknowledge the alarm by pressing
any button.
OLF value at 80% or 100% (Mixed or
CCR mode only). Acknowledge the
alarm by pressing any button.
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Alarm typeAlarm reason
OLF% value blinks if PO
value is greater than 0.5
bar.
Low priority alarm,
repeated twice.
Maximum depth value
blinks
Low priority alarm,
repeated twice; dive time
value blinks
Visual alarms
Symbol on displayIndication
2
Defined maximum depth or the
maximum depth of the device
exceeded. Acknowledge the alarm by
pressing any button.
Defined dive time exceeded.
Acknowledge the alarm by pressing
any button.
Attention - extend surface interval
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ER
Violated decompression ceiling or
bottom time is too long
Do not fly
3.3 Ascent rate
21,5
20
18.3
25
14.8
35
21,5
20
The ascent rate is displayed as a vertical bar along the right side of
the display.
When the maximum allowed ascent rate is exceeded, the lower
segment of the bar starts to blink and the top segment stays solid.
Continuous ascent rate violations result in mandatory safety stops.
3.19 Safety stops and deepstops
See
.
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WARNING: DO NOT EXCEED THE MAXIMUM ASCENT RATE!
Rapid ascents increase the risk of injury. You should always make
the mandatory and recommended safety stops if you have exceeded
the maximum recommended ascent rate. If the mandatory safety
stop is not completed, the decompression algorithm penalizes your
next dive(s).
3.4 Backlight
To active the backlight in dive mode, press [MODE].
In other modes, keep [MODE] pressed until the backlight activates.
You can define how long the backlight stays on when you activate
it or turn the backlight off altogether.
To set backlight duration:
1. While in time mode, keep [DOWN] pressed.
2.
Press [DOWN] to scroll to BACKLIGHT and press [SELECT].
3. Set duration or turn off with [DOWN] or [UP].
4. Press [MODE] to save and exit to settings.
NOTE:
When the backlight is off, it does not illuminate when an
alarm sounds.
3.5 Bookmarks
At any time during a dive, you can add a bookmark to the dive log
by pressing [SELECT].
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You can view bookmarks when scrolling the dive profile in the
logbook.
Each bookmark records present depth, time, water temperature,
heading (if the compass is enabled), and tank pressure (if available).
3.6 Calendar clock
The calendar clock is the default mode of Suunto DX .
3.6.1 Time
In the time settings, you can set the hours, minutes, seconds, and
format (12 or 24-hour).
To set time:
1. While in time mode, keep [DOWN] pressed.
2.
Press [UP] to scroll to Time and press [SELECT].
3. Set hours with [DOWN] or [UP] and confirm with [SELECT].
4. Repeat for minutes and seconds.
Set the format with [DOWN] or [UP] and confirm with [SELECT].
5. Press [MODE] to exit.
3.6.2 Date
The date and weekday are shown in the bottom row of time mode.
Press [DOWN] to toggle between views.
To set the date:
1. While in time mode, keep [DOWN] pressed.
2.
Press [UP] to scroll to Date and press [SELECT].
3. Set year with [DOWN] or [UP] and accept with [SELECT].
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4. Repeat for month and day.
5. Press [MODE] to exit.
3.6.3 Units
In the units setting, choose whether the units are displayed in the
metric or Imperial system.
1. While in time mode, keep [DOWN] pressed.
2.
Press [UP] to scroll to Units and press [SELECT].
3.
Press [DOWN] to toggle between Metric and Imperial and
confirm with [SELECT].
4. Press [MODE] to exit.
3.6.4 Dual time
Dual time allows you to keep track of the time in a second time
zone. Dual time is shown in the bottom left of the time mode
display by pressing [DOWN].
To set dual time:
1. While in time mode, keep [DOWN] pressed.
2.
Press [UP] to scroll to
3. Set hours with [DOWN] or [UP] and confirm with [SELECT].
4. Repeat for minutes.
5. Press [MODE] to exit.
Dual Time
and press [SELECT].
3.6.5 Alarm clock
Suunto DX has a daily alarm which can be set to activate once, on
weekdays or every day.
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