Suunto EON Core User Guide

SUUNTO EON CORE
USER GUIDE
2019-06-19
Suunto EON Core
1. Safety................................................................................................................................................................4
2. Getting started...............................................................................................................................................7
2.1. Display states and views................................................................................................................. 7
2.2. Icons.....................................................................................................................................................7
2.3. Set up.................................................................................................................................................. 8
2.4. Product compatibility.......................................................................................................................8
2.5. Before you dive................................................................................................................................ 9
3. Features........................................................................................................................................................ 10
3.1. Alarms, warnings and notifications............................................................................................. 10
3.2. Algorithm lock...................................................................................................................................11
3.3. Ascent rate....................................................................................................................................... 12
3.4. Battery................................................................................................................................................13
3.5. Calendar clock.................................................................................................................................13
3.6. Compass........................................................................................................................................... 14
3.6.1. Calibrating compass........................................................................................................... 14
3.6.2. Setting declination............................................................................................................. 14
3.6.3. Setting bearing lock...........................................................................................................15
3.7. Customize dive modes with DM5............................................................................................... 15
3.8. Decompression dives.................................................................................................................... 17
3.8.1. Last stop depth.................................................................................................................... 19
3.9. Display brightness.......................................................................................................................... 19
3.10. Dive history..................................................................................................................................... 19
3.11. Device info...................................................................................................................................... 20
3.12. Dive modes....................................................................................................................................20
3.13. Dive planner.................................................................................................................................. 20
3.14. Flip display...................................................................................................................................... 21
3.15. Gas consumption.......................................................................................................................... 21
3.16. Gas time..........................................................................................................................................22
3.17. Gas mixtures...................................................................................................................................23
3.18. Language and unit system.........................................................................................................24
3.19. Logbook..........................................................................................................................................24
3.20. Multi-gas diving............................................................................................................................24
3.20.1. Modifying gases during a dive..................................................................................... 25
3.20.2. Isobaric counterdiffusion (ICD).................................................................................... 25
3.21. Personal and altitude adjustments.......................................................................................... 26
3.22. Oxygen calculations................................................................................................................... 27
3.23. Rebreather diving........................................................................................................................ 27
3.23.1. Closed-circuit gases........................................................................................................ 28
3.23.2. Open-circuit gases..........................................................................................................28
3.23.3. Setpoints............................................................................................................................28
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Suunto EON Core
3.23.4. Bailouts.............................................................................................................................. 29
3.24. Safety stops and deepstops.....................................................................................................29
3.25. Sample rate...................................................................................................................................30
3.26. Standby and deep sleep........................................................................................................... 30
3.27. Surface and no-fly time................................................................................................................31
3.28. Suunto app.....................................................................................................................................31
3.29. Suunto DM5..................................................................................................................................32
3.29.1. Synchronizing logs and settings.................................................................................. 32
3.29.2. Updating firmware.......................................................................................................... 32
3.30. Suunto Fused RGBM.................................................................................................................. 32
3.30.1. Diver safety........................................................................................................................ 33
3.30.2. Altitude diving.................................................................................................................. 33
3.30.3. Oxygen exposure............................................................................................................ 33
3.31. Tank pressure ............................................................................................................................... 34
3.32. Timer...............................................................................................................................................35
3.33. Water contacts..............................................................................................................................35
4. Care and support....................................................................................................................................... 36
4.1. Handling guidelines....................................................................................................................... 36
4.2. Installing scratch guard................................................................................................................ 36
4.3. Changing strap to bungee...........................................................................................................37
4.4. Charging battery.............................................................................................................................37
4.5. Getting support...............................................................................................................................37
4.6. Disposal and recyling................................................................................................................... 38
5. Reference.....................................................................................................................................................39
5.1. Technical specifications................................................................................................................ 39
5.2. Compliance...................................................................................................................................... 41
5.2.1. EU radio directive................................................................................................................ 41
5.2.2. EU Personal Protective Equipment ...............................................................................41
5.2.3. EU depth gauge standard................................................................................................ 41
5.2.4. FCC compliance.................................................................................................................42
5.2.5. IC............................................................................................................................................42
5.3. Trademark........................................................................................................................................42
5.4. Patent notice................................................................................................................................... 42
5.5. International Limited Warranty................................................................................................... 42
5.6. Copyright......................................................................................................................................... 44
5.7. Dive terms........................................................................................................................................ 44
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Suunto EON Core
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 dive instrument, contact your Suunto dealer
before diving. Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY!
This dive computer is intended for use with compressed air only.
Safety precautions
WARNING: All computers experience failures. It is possible that this device may suddenly
fail to provide accurate information during your dive. Always use a backup dive device and
only dive with a buddy. Only divers trained in proper use of diving equipment should use this
dive device! YOU MUST READ the leaflet and user guide for your dive computer before use.
Failure to do so may lead to improper use, serious injury or death. By continuing you confirm
that you have read this notice and understand it.
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 makeup 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.
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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.
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.
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 you believe or conclude
that there is any problem with any computer function, abort the dive immediately and safely
return to the surface. Call Suunto Customer Support and return your computer to an
authorized Suunto Service Center for inspection.
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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Suunto EON Core
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.
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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Suunto EON Core
2. Getting started
2.1. Display states and views
Suunto EON Core has two main views in surface and dive states: time/no deco and compass.
Change the main view by pressing the middle button.
The lower right field shows multiple information including max. depth, tank pressure, timer,
and while diving, also no deco and stops. You can change what is shown by pressing the
lower button.
NOTE: Main views can be customized. See 3.7. Customize dive modes with DM5.
Suunto EON Core automatically switches between surface and dive state. If you are more
than 1.2 m (4 ft) below the water level, the dive state is activated.
The following display shows Suunto EON Core when tank pressure screen is in use:
•
•
•
•
•
•
Present depth is 19.0 m
Dive time is 22 minutes
Tank pressure left is 125 bar
No decompression time is 50 minutes
Safety stop is ahead at 3.0 meters
16 hours of diving time left before need to recharge
2.2. Icons
Suunto EON Core uses the following icons:
No-fly time
Surface (interval) time
Battery status (for device: charging, ok, low; for Tank POD: ok, low)
Battery level - number indicates remaining diving time before need to
recharge
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Suunto EON Core
Tank / gas pressure information
2.3. Set up
To get the most out of your Suunto EON Core, use some time to customize features and
displays. Make absolutely sure that you know your computer and have it set up as you want
before getting into the water.
To get started
1. Wake up the device by connecting the USB cable to PC/Mac.
2. Follow the startup wizard to set up the device. When ready, the device goes to surface
state.
3. Fully charge before first dive.
The startup wizard guides you through:
•
•
•
•
•
Language
Units
Time format (12h/24h)
Date format (dd.mm / mm.dd)
Connecting with DM5 (optional)
2.4. Product compatibility
Suunto EON Core can be used together with Suunto Tank POD for wireless transmission of
tank pressure to the dive computer. One or more Tank PODs can be paired with the dive
computer for multi-gas diving.
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Suunto EON Core
This dive computer can also be paired with the Suunto app over Bluetooth. With the app you
can transfer dive logs to Suunto app.
You may also connect this dive computer to a PC or Mac with the supplied USB cable and use
Suunto DM5 to modify device settings, plan dives, as well as update the dive computer
software.
With the optional bungee adapter kit for Suunto EON Core, you can replace the default strap
with a bungee cord if desired.
Do not use this dive computer with any unauthorized accessories or attempt to connect
wirelessly with mobile apps or equipment not authorized or officially supported by Suunto.
2.5. 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 dive computer, contact your Suunto dealer
before diving. Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY!
This dive computer is intended for use with compressed air only. Do not use with any other
type of scuba diving. The compressed air supply must comply wtih EU standard EN12021:2014
requirements.
Before leaving on a dive trip, it is highly recommended that inspect your dive computer
closely to make sure everything is functioning properly.
At the dive site, you should perform your manual checks before entering the water.
For the dive computer, ensure that:
1.
2.
3.
4.
5.
6.
Suunto EON Core is in the correct mode and the display is working as expected.
Altitude setting is correct.
Personal setting is correct.
Deepstops are set correctly.
Unit system is correct.
Compass is calibrated. Start the calibration manually to also confirm that the dive
computer audible sounds are working. After successful calibration, you should here a
sound.
7. The battery is fully charged.
8. All primary and backup gauges for time, pressure and depth, both digital and mechanical,
are showing correct, consistent readings.
9. If Suunto Tank PODs are in use, connections are working and gas selections are correct.
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Suunto EON Core
3. Features
3.1. Alarms, warnings and notifications
Suunto EON Core has color-coded alarms, warnings and notifications. They are shown
prominently on the display with an audible alarm (if tones are on). Alarms are always red.
Warnings may be red or yellow. Notifications are always yellow.
When an alarm, warning, or notification occurs, a message is displayed as a pop-up. Pop-up
messages can be acknowledged by pressing any button. The information needing attention
remains on screen or as a scrollable element in the bottom field until the situation is back to
normal.
Alarms are critical events that always require immediate action. When an alarm situation
comes back to normal, the alarm will stop automatically.
Alarm
Explanation
Ascent speed exceeds safe speed of 10 m (33 ft) per
minute for five seconds or more.
Decompression ceiling broken by more than 0.6 m (2 ft)
on a decompression dive. Immediately descend back
below ceiling depth and continue to ascend normally.
Partial pressure of oxygen exceeds safe level (>1.6).
Immediately ascend or change to a gas with lower
oxygen percentage.
Partial pressure of oxygen below safe level (<0.18).
Immediately descend or change to a gas with higher
oxygen percentage.
Warnings alert you to events that can impact your health and safety if you do not take action.
Acknowledge the warning by pressing any button.
Warning
Explanation
CNS 100%
Central nervous system toxicity level at 100% limit
OTU 300
Recommended daily limit for Oxygen tolerance unit
reached
Depth
Depth exceeds your depth alarm limit
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Suunto EON Core
Warning
Explanation
Dive time
Dive time exceeds your dive time alarm limit
Diluent high pO₂
Diluent partial pressure of oxygen exceeds safe level
(>1.6); no immediate danger unless diluent is used, e.g.
for bailout
Diluent low pO₂
Diluent partial pressure of oxygen below safe level
(<0.18); no immediate danger unless diluent is used,e.g.
for bailout
Gas time
Gas time exceeds your gas time alarm limit, or tank
pressure is below 35 bar (~510psi), in which case gas
time is zero.
Safety stop broken
Safety stop ceiling broken by more than 0.6 m (2 ft)
Tank pressure
Tank pressure is below your tank pressure alarm limit.
In addition to the configurable gas time alarm, your dive
computer also shows an alarm when 75 bar and 50 bar
pressures are reached. The tank pressure number is
forced onto the display and turns yellow after 75 bar
and red after 50 bar.
Notifications indicate events that require preventive actions. Acknowledge the notification by
pressing any button.
Notification
Explanation
CNS 80%
Central nervous system toxicity level at 80% limit
OTU 250
Approximately 80% of recommended daily limit for OTU
reached
Change gas
On multi-gas dive when ascending, it is safe to switch to
next available gas for optimum decompression profile
Low battery
Approximately three hours of dive time left
Re-charge needed
Approximately two hours of battery time left; re-charging
required before next dive
Setpoint switched
Setpoint switched automatically on rebreather dive. See
3.23.3. Setpoints
Tank POD low battery
Tank POD battery life low; battery change required
3.2. Algorithm lock
Suunto Fused™ RGBM algorithm is locked for 48 hours if you omit decompression stops for
longer than three (3) minutes. When the algorithm is locked, no algorithm information is
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available and Locked is shown instead. Locking the algorithm is a safety feature, highlighting
that the algorithm information is no longer valid.
When you ascend above the decompression ceiling by more than 0.6 m (2 ft), the ceiling
parameter turns red with an arrow pointing down appears, and an audio alarm is generated.
In such a condition, you should descend back below the ceiling level to continue the
decompression. If you fail to do so within three (3) minutes, Suunto EON Core locks the
algorithm calculation and displays Locked instead, as shown below. Note that the ceiling
value is no longer present.
In this state, you significantly increase your risk of decompression sickness (DCS).
Decompression information is not available for the next 48 hours after surfacing.
It is possible to dive with the device when the algorithm is locked, but instead of the
decompression information, Locked is shown. Diving while the algorithm is locked resets the
algorithm lock time back to 48 hours when you surface.
3.3. Ascent rate
During a dive, the bar on the left indicates ascent rate. One bar step corresponds to 2 m (6.6
ft) per minute.
The bar is also color coded:
•
•
•
Green indicates ascent rate is ok, less than 8 m (26.2 ft) per minute
Yellow indicates ascent rate is moderately high, 8-10 m (26-33 ft) per minute
Red indicates ascent rate is too high, over 10 m (33 ft) per minute
When maximum allowed ascent rate is exceeded for five seconds, an alarm is generated.
Ascent rate violations result in longer safety stop times and mandatory safety stops.
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 after
you have exceeded the maximum recommended ascent rate. If this mandatory safety stop is
not completed the decompression model will penalize your next dive(s).
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Suunto EON Core
3.4. Battery
Suunto EON Core has a rechargeable lithium-ion battery. Charge the battery by connecting
Suunto EON Core to a power source with the included USB cable. As a power source use
your computer USB port.
The battery icon in the upper-left corner of the display shows the battery status. To the right of
the battery icon is the estimated remaining dive time in hours.
Icon
Explanation
Estimated remaining dive time is 16 hours; no immediate need to recharge
Estimated remaining dive time is three (3) hours or less; recharge needed
Estimated remaining dive time is less than one (1) hour; recharge
immediately
Battery is charging, showing current charge level as remaining dive time
When the charge level drops below 2 (two) hours, you cannot start a dive with Suunto EON
Core. A pop-up message indicates recharge is needed.
3.5. Calendar clock
Time and date settings are found under General / Device settings / Time & date.
Time and date formats are found under General / Device settings / Units and formats.
To change time and date
1.
2.
3.
4.
5.
6.
7.
Keep the middle button pressed to enter menu.
Browse to General / Device settings / Time & date.
Scroll to Set time or Set date with the upper or lower button.
Press the middle button to enter the setting.
Adjust the setting with the upper or lower button.
Press the middle button to move to the next setting.
Press again the middle button when last value is set to save and go back to Time & date
menu.
8. Keep middle button pressed to exit when done.
To change time and date formats
1.
2.
3.
4.
Keep the middle button pressed to enter menu.
Browse to General / Device settings / Units and formats.
Scroll to Time format or Date format with the upper or lower button.
Follow steps 5-8 as above to change and save formats.
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3.6. Compass
Suunto EON Core includes a tilt-compensated digital compass, available as a main view.
3.6.1. Calibrating compass
When you first start using Suunto EON Core, and after each charging, the compass needs to
be calibrated and it is required to do so to activate it. Suunto EON Core displays the
calibration icon when you enter the compass view.
During the calibration process, the compass adjusts itself to the surrounding magnetic field.
Because of changes in the surrounding magnetic field, it is recommended to re-calibrate the
compass before each dive.
To manually start calibration:
1.
2.
3.
4.
5.
6.
Take off your Suunto EON Core.
Keep the middle button pressed to enter the menu.
Browse to General / Compass.
Press the middle button to enter Compass.
Scroll up or down to select Calibrate.
Start calibrating the device by trying to move it around the xyz axels of the coordinate
system (like you were drawing a small circle) so that the magnetic field is as stable as
possible during the calibration. To achieve this, try to keep Suunto EON Core in the same
location and do not move it around using large movements.
7. Repeat the rotation as long as the compass calibration is successful.
8. A sound indicates when the calibration succeeded, and the screen goes back to Compass
menu.
NOTE: If the calibration fails several times in a row, you may be in an area with strong
sources of magnetism, such as large metal objects. Move to another location and try to
calibrate the compass again.
3.6.2. Setting declination
You should always adjust your compass declination for the area where you are diving to get
accurate heading readings. Check the local declination from a trusted source and set the
value in Suunto EON Core.
To set declination:
1.
2.
3.
4.
5.
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Keep the middle button pressed to enter the menu.
Browse to General / Compass.
Press the middle button to enter Compass.
Press the middle button again to enter Declination.
Scroll up/down to set the angle of declination: Starting from 0.0º scroll up towards East or
down towards West declination. To turn declination off, set declination angle to 0.0º.
Suunto EON Core
6. Press middle button to save changes and go back to the Compass menu.
7. Keep the middle button pressed to exit.
3.6.3. Setting bearing lock
A bearing is the angle between north and your target. In simple terms, it is the direction you
want to travel. Your heading, on the other hand, is your actual direction of travel.
You can set a bearing lock to help you orientate yourself underwater and ensure you maintain
your direction of travel. For example, you can set a bearing lock for the direction to the reef
before leaving the boat.
You can reset the bearing lock at any time, but you can only clear a bearing lock while at the
surface.
To set a bearing lock:
1. Press the middle button to change to the compass view.
2. Hold your Suunto EON Core in level in front of you, with the top pointing in the direction to
your target.
3. Keep the lower button pressed until you see the Bearing locked notification.
Once you have a bearing locked, the lock position is indicated on the compass rose, as
shown below.
Below your heading (large number in center of compass), you also see the relative difference
between your bearing and your heading. So, for instance, when you want to travel in the
exact direction of your bearing, the lower number should be 0°.
If you want to set a new bearing lock, just repeat the same procedure above. Each bearing
lock is recorded in your dive log with a time stamp.
To clear the bearing lock from your compass view, you need to return to the surface.
To clear a bearing lock:
1.
2.
3.
4.
5.
While in surface state, keep the middle button pressed to enter the main menu.
Scroll to GENERAL with the upper or lower buttons and press the middle button.
Press the middle button to enter Compass.
Select Clear bearing with the middle button.
Keep the middle button pressed to exit.
3.7. Customize dive modes with DM5
You can customize Suunto EON Core views and features with Suunto DM5. Create up to 10
different dive modes with up to four custom views each.
Watch the video on YouTube.
To customize Suunto EON Core:
1. Download and install Suunto DM5 from http://www.suunto.com/DM5.
2. Connect your Suunto EON Core to the computer with the USB cable.
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Suunto EON Core
3. In the devices window, select Suunto EON Core.
4. Select the Customization tab. You can create new dive modes and modify existing ones.
NOTE: When creating or modifying dive modes, you need to synchronize the changes
with your Suunto EON Core before disconnecting the USB cable to save the changes to your
device.
Customization is divided into four categories:
•
•
•
•
Dive mode name
Dive algorithm
Gas settings
Customize views
Dive mode (name)
Maximum length of the name is 15 characters. Use something short and simple that helps you
identify easily the features and information that you have customized on this mode.
Dive algorithm
You can select to use Suunto Fused™ RGBM or no algorithm (see 3.30. Suunto Fused RGBM).
If you select no algorithm, Suunto EON Core functions as a gauge (bottom timer) in that mode.
If you select Suunto Fused RGBM, you have two additional options: personal setting
(algorithm conservatism) and altitude setting.
Gas settings
Here you configure what you see under the Gas(es) menu in Suunto EON Core. The multiple
gases option can be turned on or off. Turn it on to be able to dive with multiple gases. When
turned off, the gas menu is simplified and easier to use with only one gas.
Helium can also be turned on or off. If you turn this off, you cannot see the helium component
for any gases.
The gas max pO2 setting can be set to manual or fixed. The fixed option means that the
selected value is used for all gases and the option to manually edit them in the Gas(es) menu
is disabled. When manual is selected, you can edit the gas max pO2 for each gas individually
in the Gas(es) menu.
Customize views
For each dive mode, you can create up to four custom views. For each view, there are two
areas of view customization: style and content.
The style of the mode can be prominent, graphical or classic.
Prominent style presents key information with large numbers:
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Suunto EON Core
Graphical style presents information with additional visual elements:
With classic, information is presented in the traditional manner using numbers:
Within each view of the mode, you can define what information is shown in customizable
fields. When editing the view in DM5, you get a preview of how it will look on your Suunto
EON Core.
In each view, you can define multiple custom field pairs for the values shown in the lower left
and right corners. When you use the view in Suunto EON Core, you can cycle through these
field pairs by pushing the lower button.
3.8. Decompression dives
If you exceed the no-decompression limit on a dive, Suunto EON Core provides the
decompression information required for ascent. Ascent information is always presented with
two values:
•
•
ceiling: depth that you should not go above
asc. time: optimum ascent time in minutes to surface with given gases
WARNING: NEVER ASCEND ABOVE THE CEILING! You must not ascend above the
ceiling during your decompression. In order to avoid doing so by accident, you should stay
somewhat below the ceiling.
On a decompression dive, there could be three kinds of stops:
•
•
•
Safety stop
Deep stop
Decompression stop
You can turn deep stops on or off under Dive settings / Parameters. In addition, you can
adjust the safety stop time to be 3, 4 or 5 minutes.
The illustration below presents how decompression is displayed on Suunto EON Core. When
you ascend close to the ceiling depth and enter the deco window area, two arrows appear in
front of the ceiling number.
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Suunto EON Core
The deco window area is ceiling depth + 3.0 meters (9 ft). This is the area where
decompression takes place.The closer to the ceiling you stay, the more optimal the
decompression time is.
If you ascend above the ceiling depth, there is still a safe margin area, equal to ceiling depth
– 0.6 meters (2 ft). In this safe margin area, decompression calculation still continues, but you
are advised to go down below ceiling depth. This is indicated by the ceiling depth number
turning yellow with a downward pointing arrow in front of it.
If go above the safe margin area, the decompression calculation is paused until you go back
down below this limit. An audible alarm and a downward arrow in front of a red ceiling
number indicate unsafe decompression.
If you ignore the alarm and stay above the safe margin for three minutes, Suunto EON Core
locks the algorithm calculation, and decompression information will not be available anymore
on the dive. See 3.2. Algorithm lock.
Below is a typical decompression dive view showing ascent time and the first required deep
stop at 20.3 meters:
Suunto EON Core shows the ceiling value always from the deepest of these stops. deep stop
and safety stop ceilings are always at constant depth when you are at the stop. Stop time is
counted down in minutes and seconds.
Below is an example of what Suunto EON Core displays during deep stop:
Below is an example of what Suunto EON Core displays during safety stop:
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Suunto EON Core
With decompression stops, the ceiling is always decreasing while you are near the ceiling
depth, providing continuous decompression with optimum ascent time.
Below is an example of what Suunto EON Core looks like on decompression stop:
NOTE: It is always recommended to keep close to the decompression ceiling when
ascending.
Ascent time is always the minimum time needed to reach the surface. It includes:
•
•
•
Time required for deep stops
Ascent time from depth at 10 m (33 ft) per minute
Time needed for decompression
WARNING: YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DISPLAYED BY THE
DIVE COMPUTER! The ascent time will increase if you: (1) remain at depth, (2) ascend slower
than 10 m/min (33 ft/ min), (3) make your decompression stop deeper than at the ceiling,
and/or (4) forget to change the used gas mixture. These factors might also increase the
amount of breathing gas required to reach the surface.
3.8.1. Last stop depth
You can adjust the last stop depth for decompression dives under Dive settings »
Parameters » Last stop depth. There are two options 3 and 6 m (10 and 20 ft).
By default, the last stop depth is 3 m (10 ft). This is the recommended last stop depth.
NOTE: This setting does not affect the ceiling depth on a decompression dive. The last
ceiling depth is always 3 m (10 ft).
3.9. Display brightness
The brightness of the display can be adjusted under General » Device settings » Brightness.
The default value is 50%. Adjusting this value has direct impact on battery life.
TIP: You can significantly extend battery life by turning down the display brightness.
3.10. Dive history
Dive history is a summary of all the dives done with your Suunto EON Core. The history is
divided according to the dive mode used for the dive. Each dive type summary includes the
number of dives, cumulative dive hours and maximum depth.
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Suunto EON Core
NOTE: If there is more history information available than can be shown in a single
screen, you can scroll through the additional information with the upper and lower buttons.
3.11. Device info
Information about your Suunto EON Core can be found under General » About EON. This
information includes device history, software version and radio compliance.
To access Suunto EON Core information
1.
2.
3.
4.
Keep middle button pressed to enter the main menu.
Scroll to General with the upper or lower buttons and press the middle button.
Press the middle button to enter About EON.
Keep middle button pressed to go back and exit from the menu.
3.12. Dive modes
By default Suunto EON Core has two dive modes: Air/Nitrox and Gauge (bottom timer). Select
the appropriate mode for your dive under Dive settings » Mode.
NOTE: Air/Nitrox dive mode is a single gas mode. The Gas(es) menu under this mode
will not allow you to add more than one gas. However, this can be changed through
customization. See 3.7. Customize dive modes with DM5.
The default dive modes us prominent style. You can change the style and other settings, as
well as create additional dive modes using Suunto DM5. See 3.7. Customize dive modes with
DM5.
In DM5 you can also enable multigas mode for Trimix and other more advanced
decompression dives.
The decompression algorithm used in Suunto EON Core is Suunto Fused™ RGBM. For more
information about the algorithm, see 3.30. Suunto Fused RGBM.
Gauge is a bottom timer mode and thus has no decompression information or calculation
included.
NOTE: After diving in gauge mode, decompression calculation is locked for 48 hours. If
during this time you dive again, there is no decompression calculation available and
LOCKED is shown in decompression information fields.
3.13. Dive planner
The dive planner in Suunto EON Core helps you to quickly plan your next dive. The planner
displays available no decompression time and gas times for your dive based on depth and
gas mixture.
The dive planner can also help you plan dives in series, taking into account the residual
nitrogen from your previous dive(s) based on the planned surface time you enter.
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Suunto EON Core
Before planning your first dive, make sure you have gone through the planner settings and
configured them according to your personal preference. You can view the planner and adjust
settings under the Dive planner menu.
These settings include tank size and pressure at the start of the dive as well as personal gas
consumption (surface gas consumption). If you are not sure what your personal gas
consumption is, we recommend using the default value of 25 L/min (0.90 cubic ft/min).
NOTE: Estimated gas time is calculated based on tank pressure at start minus 35 bar
(510 psi).
The calculated no decompression time is based on dive depth and gas mixture. Any residual
nitrogen from previous dives, as well as surface time, is taken into consideration. GAS TIME is
dependent on the dive depth, personal consumption and tank size/pressure.
In the dive planner display, you can edit depth and mixture.
For example, for the first dive in a series, if you enter 18 meters and use a mixture of 21%
oxygen, you see the following:
In this example, the calculated values are:
•
•
•
Dive number in the dive series: 1
Available no decompression time: 51 minutes
Remaining gas time: 41 minutes
When planning additional dives in series, the dive planner allows you to adjust surface time. In
the example below, the surface time before the second dive is 1:37 minutes. Adjust surface
time to see how it impacts no decompression time.
3.14. Flip display
You can flip the display of Suunto EON Core to have the buttons on either the left or right side
of the dive computer, making it easier to wear on either arm.
Change the button orientation under General » Device settings » Flip display.
Select Buttons right to have the buttons on the right-hand side or Buttons left to have them
on the left-hand side.
3.15. Gas consumption
Gas consumption refers to your real-time consumption rate of gas during a dive. In other
words, it is the amount of gas a diver would use in one minute on the surface. This is
commonly known as your surface air consumption or SAC rate.
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Suunto EON Core
Gas consumption rate is measured in liters per minute (cubic feet per minute). This is an
optional field and needs to be added to your custom dive mode views in DM5. In the classic
view below, gas consumption rate is in the lower right-hand corner.
To enable gas consumption
1. Add the gas consumption filed to your custom dive mode in DM5. See 3.7. Customize dive
modes with DM5.
2. Install and pair a Suunto Tank POD. See Tank pressure.
3. After you have selected the correct gas and returned to the main time view, keep the
middle button pressed to enter menu.
4. Scroll to Gases with the lower button and select with the middle button.
5. Scroll to the gas you just selected from your Tank POD and select with the middle button.
6. Scroll to Tank size and select with the middle button.
7. Check the tank size and change the size with the upper or lower button as needed.
Confirm change with the middle button.
8. Keep the middle button pressed to exit the menu.
NOTE: For accurate gas consumption, you must define the tank size. Not defining the
tank size leads to incorrect gas consumption readings.
3.16. Gas time
Gas time refers to remaining air (gas) left with current gas mixture, measured in minutes. The
time is based on tank pressure value and your current breathing rate.
Gas time is also highly dependent on your current depth. For example, all other factors being
the same, including breathing rate, tank pressure and tank size, depth affects gas time as
follows:
•
•
•
At 10 m (33 ft, surrounding pressure 2 bar), gas time is 40 minutes.
At 30 m (99 ft, surrounding pressure 4 bar), gas time is 20 minutes.
At 70 m (230ft, surrounding pressure 8 bar), gas time is 10 minutes.
Gas time is a default field in the lower right-hand corner of default dive modes. If you have not
paired a Suunto Tank POD, the gas time field shows n/a. If you have paired a POD but there is
no data being received, the field shows –. This may be because the POD is not in range, the
tank is closed, or the POD battery is low.
22
Suunto EON Core
3.17. Gas mixtures
If Nitrox or Trimix dive mode is selected, you need to define the gas(es) for the
decompression algorithm to work properly. You define the gases under Gas(es). In Nitrox
mode, gas only has only oxygen (O2%). If helium is turned on in the dive settings, He% is
available.
Trimix dive mode is disabled by default, so helium is not available. Activate Trimix in DM5 and
then tou can choose multiple gases by turning on multiple gases option in the dive settings.
NOTE: When you have analyzed your gas, you should round the result down when
entering it for Suunto EON Core. For example, if the analyzed gas is 31.8% oxygen, then
define the gas as 31%. This makes the decompression calculations safer. Oxygen calculations
(pO2, OTU, CNS%) are also kept conservative, since the oxygen percent used for those are
O2% + 1.
WARNING: THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL PERCENTAGE
VALUES OF OXYGEN CONCENTRATION. DO NOT ROUND UP FRACTIONAL PERCENTAGES!
Rounding up will cause nitrogen percentages to be understated and will affect
decompression calculations.
NOTE: You can customize what you see in the Gas(es) menu. See 3.7. Customize dive
modes with DM5.
It is important to understand how the Gas(es) menu works on Trimix mode, where you can
make use of multiple gases. For example, you may have the following gases when diving to
55 m (180.5 ft):
•
•
•
tx18/45, MOD 58m
tx50/10, MOD 21m
oxygen, MOD 6m
In the screeshot below, the menu has three gases and tx18/45 is selected as the active gas.
Even though only one gas is active, the decompression algorithm calculates ascent time
(during dive) using all these three gases.
To select another active gas:
1. While in the Gas(es) menu, press the middle button to see gas options.
2. Scroll with upper or lower buttons to highlight Select.
3. Press the middle button again to confirm.
If you are diving with only one gas, ensure you have only that one gas in the Gas(es) menu.
Otherwise, Suunto EON Core expects you to use all gases in the list and notifies you to
change gases during the dive.
23
Suunto EON Core
3.18. Language and unit system
You can change the device language and unit system from the settings under
General »Device settings.
You can change these settings at any time. Suunto EON Core refreshes immediately to reflect
the changes.
Under the unit settings, you have the option of selecting metric or Imperial as a global setting,
meaning the affect all measurements. Alternative, you can choose Advanced which allows
you to set the unit system for specific measurements. For example, you could use metric for
depth, and Imperial for tank pressure.
3.19. Logbook
Dive logs can be found under Logs. By default, they are listed by date and time, and each
entry listing shows the max. depth and dive time of the log.
Dive log details and profile can be browsed by scrolling through the log with upper or lower
button and selecting it with the middle button.
Each dive log contains data samples with fixed 10-second intervals. The dive profile includes a
cursor for browsing the logged data, scrollable with upper and lower buttons. For more
detailed log analyses, upload the dive(s) to Suunto DM5 (see 3.29. Suunto DM5).
When the logbook memory gets full, the oldest dives are deleted to make space for new
ones.
NOTE: If you surface and then dive again within five minutes, Suunto EON Core counts
this as one dive.
3.20. Multi-gas diving
Suunto EON Core allows gas changes during a dive between the gases defined in the
Gas(es) menu. When ascending, you are always notified to change gases when a better gas
is available.
For example, you may have the following gases when diving to 55 m (180.5 ft):
•
•
•
tx18/45, MOD 58m
tx50/10, MOD 21m
oxygen, MOD 6m
While ascending, you are notified to change gas at 21 m (70 ft) and 6 m (19.7 ft) according to
the maximum operating depth (MOD) of the gas.
24
Suunto EON Core
A pop-up notifies you when to change gases, as shown below:
WARNING: When diving with multiple gases, remember that the ascent time is always
calculated with the assumption that you use all the gases found in the Gas(es) menu. Always
check that you have only the gases for your current planned dive defined before you dive.
Remove the gases that are not available for the dive.
3.20.1. Modifying gases during a dive
Modifying gases is for emergency cases only. For example, due to unforeseen events, a diver
might lose a gas mixture, in which case the diver could adjust to the situation by deleting that
gas mixture from gas list Suunto EON Core. This allows the diver to continue to dive and get
correct decompression information calculated the dive computer.
In another case, if for some reason a diver runs out of gas and needs to use a gas mixture
from a dive buddy, it is possible to adapt Suunto EON Core to the situation by adding the new
gas mixture to the list. Suunto EON Core re-calculates decompression and shows the correct
information for the diver.
NOTE: This feature is not enabled by default, it must be activated and creates an
additional step to the gas menu during the dive. It is only available if multiple gases are
selected for the dive mode.
To enable modifying gases, turn the feature on in the settings menu under Dive settings /
Parameters / Modify gases.
When enabled, during a multi-gas dive, you can add a new gas as well as select an existing
gas from the gas list to remove it.
3.20.2. Isobaric counterdiffusion (ICD)
Isobaric counterdiffusion (ICD) occurs when different inert gases (such as nitrogen and
helium) diffuse in different directions during a dive. In other words, one gas is being absorbed
by the body while the other is being released. ICD is a risk when diving with Trimix mixtures.
This may happen during a dive, for example, when Trimix gas is switched to Nitrox or light
Trimix. When the switch is made, helium and nitrogen rapidly diffuse in opposite directions.
This produces a transient increase in total inert gas pressure which can lead to
decompression sickness (DCS).
Currently there are no algorithms that can address ICD. Therefore, you need to take it into
account when planning Trimix dives.
You can use Suunto EON Core to plan your Trimix usage safely. Under the GASES menu, you
can adjust oxygen (O2) and helium (He) percentages to see the change in partial pressure of
nitrogen (ppN2) and the partial pressure of helium (ppHe) values.
An increase in partial pressure is indicated by a positive number, and a decrease by a
negative number. The changes in ppN2 and ppHe are displayed next to each gas mixture that
that you want to switch to. Maximum Operating Depth (MOD) is assumed to be the depth
when start to use the gas mixture.
25
Suunto EON Core
An ICD warning is generated when the gas switch depth is greater than 10 m (30 ft) and
either:
1. The change ppN2 increases by more than +0.5, or
2. The change in ppHe increases by more than +0.5 and ppN2 decreases by more than
-0.25.
If these limits are exceeded with a gas switch, Suunto EON Core indicates the risk of ICD as
shown below:
In this example, the available gas mixtures for a deep Trimix dive are:
•
•
•
•
Trimix 15/55
Trimix 35/10
Trimix 50/10
Oxygen
Suunto EON Core highlights the dangerous ICD condition when the gas mixture switches
from 15/55 to 35|10 at a depth of 34.4 m.
If this gas switch is made, the change in ppN2 and ppHe are far beyond the safe limits.
One way to avoid the ICD risk is to increase helium content in the 35/10 gas mixture to a
35/25 Trimix mixture. This would keep the changes in partial pressure at a safe level and
remove the danger of sudden ICD.
3.21. Personal and altitude adjustments
There are several factors that can affect your susceptibility to DCS. Such factors vary between
divers, as well as from one day to another.
The personal factors which tend to increase the possibility of DCS include:
•
•
•
•
•
•
•
•
exposure to low temperature – water temperature less than 20 °C (68 °F)
below average physical fitness level
fatigue
dehydration
stress
obesity
patent foramen ovale (PFO)
exercise before or after dive
WARNING: SET THE CORRECT PERSONAL SETTING! Whenever it is believed that risk
factors that tend to increase the possibility of DCS exist, it is recommended that you use this
option to make the calculations more conservative. Failure to select the correct personal
setting will result in erroneous dive and planning data.
The five-step personal setting can be used to adjust the algorithm conservatism to fit your
DCS susceptibility. You can find the setting under Dive settings / Parameters / Personal.
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Suunto EON Core
Personal level
Explanation
More aggressive (-2)
Ideal conditions, excellent physical fitness, highly
experienced with a lot of dives in the near past
Aggressive (-1)
Ideal conditions, good physical fitness, well experienced
with dives in the near past
Default (0)
Ideal conditions (default value)
Conservative (+1)
Some risk factors or conditions exist
More conservative (+2)
Several risk factors or conditions exist
WARNING: Personal adjustment setting 0, -1 or -2 causes a high risk of DCS, or other
personal injury, and death.
In addition to the personal setting, Suunto EON Core can be adjusted for diving at different
altitudes. This setting automatically adjusts the decompression calculation according to the
given altitude range. You can find the setting under Dive settings / Parameters / Altitude and
select from three ranges:
•
•
•
0 – 300 m (0 – 980 ft) (default)
300 – 1500 m (980 – 4900 ft)
1500 – 3000 m (4900 – 9800 ft)
WARNING: Traveling to a higher elevation can temporarily cause a change in the
equilibrium of dissolved nitrogen in the body. It is recommended that you acclimatize to the
new altitude before diving.
3.22. Oxygen calculations
During a dive, Suunto EON Core calculates partial pressure of oxygen (pO2), central nervous
system toxicity (CNS%) and pulmonary oxygen toxicity, tracked by OTU (oxygen toxicity units).
The oxygen calculations are based on currently accepted exposure time limit tables and
principles.
By default in Air/Nitrox dive mode, CNS% and OTU values are not displayed until they reach
80% of their recommended limits. When either value reaches 80%, Suunto EON Core notifies
you and the value stays in the view. In Trimix mode, CNS% and OTU values are displayed in
the bottom-right corner field as scrollable info.
NOTE: You can customize views to always show CNS% and OTU.
3.23. Rebreather diving
You can use Suunto EON Core for rebreather diving by customizing your device in DM5.
Suunto recommends uisng classic or graphical style with rebreather diving. However, you can
use prominent view and customize fields if desired.
Fixed setpoint calculation enables Suunto EON Core to be used as a backup dive computer
on rebreather dives. It does not control or monitor the rebreather unit in any way.
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Suunto EON Core
When you select your custom multi-gas mode for CCR diving in the dive mode setting the
gases menu is split into two: CC gases (closed-circuit gases) and OC gases (open-circuit
gases).
NOTE: For rebreather dives, Suunto EON Core should be used as a backup device only.
The primary control and monitoring of your gases should be done through the rebreather
itself.
3.23.1. Closed-circuit gases
On a rebreather dive, you need at minimum two closed-circuit gases: one is your pure oxygen
tank, and the other is a diluent. You can define additional diluents as needed.
The correct oxygen and helium percentages of the diluent gas(es) in your diluent cylinder(s)
must always be entered into the dive computer (or through DM5) to ensure correct tissue and
oxygen calculation. Diluent gas(es) used on a rebreather dive are found under CC gases in
the main menu.
3.23.2. Open-circuit gases
As with diluents, you must alway define the correct oxygen and helium percentages of bailout
gas(es) for all your cylinders (and additional gases) to ensure correct tissue and oxygen
calculation. Bailout gases for a rebreather dive are defined under OC gases in the main menu.
3.23.3. Setpoints
Your cutom rebreather dive mode has two setpoint values, low and high. Both are
configurable:
•
•
Low setpoint: 0.4 – 0.9 (default: 0.7)
High setpoint: 1.0 – 1.6 (default: 1.3)
Typically you do not need to modify the default setpoint values. However, you can change
them as needed either in DM5 or under the main menu.
To change setpoint values in Suunto EON Core:
1.
2.
3.
4.
While in surface state, keep middle button pressed to enter main menu.
Scroll to Setpoint with the upper button and select with the middle button.
Scroll to Low setpoint or High setpoint and select with the middle button.
Adjust the setpoint value with the lower or upper button and accept with the middle
button.
5. Keep middle button pressed to exit menu.
Setpoint switching
Setpoints can be switched automatically according to depth. By default the low setpoint
switch depth is 4.5 m (15 ft), and the high setpoint switch depth is 21 m (70 ft).
The auto setpoint switching is off by default for the low setpoint and on for the high setpoint.
To change auto setpoint switching in Suunto EON Core:
1. While in surface state, keep middle button pressed to enter main menu.
2. Scroll to Setpoint with the upper button and select with the middle button.
3. Scroll to Switch low or Switch high and select with the middle button.
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Suunto EON Core
4. Adjust the depth value for the setpoint switch with the lower or upper button and accept
with the middle button.
5. Keep middle button pressed to exit menu.
Popup notifications indicate when the setpoint is switched.
During a rebreather dive, you can also switch to a custom setpoint at any time.
To change to a custom setpoint:
1. While diving in a rebreather mode, keep middle button pressed to enter main menu.
2. Scroll to Custom setpoint and select with the middle button.
3. Adjust the setpoint value as needed with the lower or upper button and accept with the
middle button.
A popup notification confirms the custom setpoint switch.
NOTE: When you change to a custom setpoint, the automatic setpoint switching is
turned off for the remainder of the dive.
3.23.4. Bailouts
If at any point during a rebreather dive you suspect a malfunction of any sort, you should
switch to a bailout gas and abort the dive.
To change to a bailout gas:
1. Keep the middle button pressed to enter main menu.
2. Scroll to OC gases and select with middle button.
3. Scroll to the desired bailout gas and select with the middle button.
After a bailout gas is selected, the setpoint field is replaced with the pO2 value of the selected
open-circuit gas.
If the malfunction is rectified or the dive situation otherwise normalizes, you can switch back
to a diluent using the same procedure as below, but selecting from CC gases.
3.24. Safety stops and deepstops
A three (3) minute safety stop is always recommended for every dive over 10 meters (19.7 ft).
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Suunto EON Core
The time for a safety stop is calculated when you are between 2.4 and 6 m (7.9 and 19.7 ft).
This is presented with up/down arrows in front of the stop depth. The safety stop time is
shown in minutes and seconds. The time may exceed three (3) minutes if you ascend too fast
during dive.
Deepstops activate when you dive deeper than 20 m (65.6 ft). Deepstops are presented like
safety stops. You are in the deepstop area when the deepstop depth has up/down arrows in
front of it and deepstop time is running.
NOTE: For safety reasons, you cannot switch off deepstops if helium (trimix gas
mixtures) is enabled for the dive mode in use.
3.25. Sample rate
Suunto EON Core uses a fixed sample rate of 10 seconds for all log recordings.
3.26. Standby and deep sleep
Standby and deep sleep are two functions that are designed to prolong battery life. Standby
is an adjustable mode that turns off the screen after a set amount of time if Suunto EON Core
is not used.
To adjust the standby time:
1.
2.
3.
4.
5.
6.
Keep the middle button pressed to enter the menu.
Browse to General » Device settings » Standby.
Press the middle button to enter Standby.
Scroll up/down to select the desired standby time in minutes.
Press the middle button to save changes and return to the Device settings menu.
Keep the middle button pressed to exit.
Deep sleep
Deep sleep is a function that prolongs battery life when Suunto EON Core has not been used
for some time. Deep sleep is activated when two days have passed since:
•
•
No buttons have been pressed
Dive calculation has ended
Suunto EON Core wakes up when it is connected to a PC/charger, when a button is pressed,
or when the water contact gets wet.
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Suunto EON Core
3.27. Surface and no-fly time
After a dive, Suunto EON Core displays surface time since the previous dive and a countdown
time for recommended no-fly time. During the no-fly time, flying or traveling to higher altitude
should be avoided.
No-fly time is always at least 12 hours and equals desaturation time when it is more than 12
hours. For desaturation times shorter than 70 minutes, no no-fly time is displayed.
If decompression is omitted during a dive so that Suunto EON Core enters permanent error
mode (see 3.2. Algorithm lock), the no-fly time is always 48 hours. Similarly, if dive is done in
gauge mode (bottom timer), the no-fly time is 48 hours.
WARNING: YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COMPUTER COUNTS
DOWN THE NO-FLY TIME. ALWAYS ACTIVATE THE COMPUTER TO CHECK THE REMAINING
NO-FLY TIME PRIOR TO FLYING! Flying or traveling to a higher altitude within the no-fly time
can greatly increase the risk of DCS. Review the recommendations given by Divers Alert
Network (DAN). There can never be a flying-after-diving rule that is guaranteed to completely
prevent decompression sickness!
3.28. Suunto app
With the Suunto app, you can easily transfer your dive logs to the app where you can follow
and share your diving adventures.
To pair with Suunto app on iOS:
1. Download and install Suunto app on your compatible Apple device from the iTunes App
Store. The app description includes the latest compatibility information.
2. Start Suunto app and turn on Bluetooth if it is not on already. Leave the app running in the
foreground.
3. If you have not yet set up your Suunto EON Core, do so now (see Getting started).
4. Tap the settings icon in the upper right and tap on the ' + ' icon to add a new device.
5. Tap on your dive computer from the list of found devices and enter the passkey shown on
the Suunto EON Core display.
To pair with Suunto app on Android:
1. Download and install Suunto app on your compatible Android device from Google Play.
The app description includes the latest compatibility information.
2. Start Suunto app and turn on Bluetooth if it is not on already. Leave the app running in the
foreground.
3. If you have not yet set up your Suunto EON Core, do so now (see Getting started).
4. A pop-up screen opens on your Android device. Select [Pair] .
5. Enter the passkey shown on your dive computer display into the paring request field on
your mobile device and tap [OK] .
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Suunto EON Core
3.29. Suunto DM5
The Suunto DM5 software program allows you to track and analyze all of your dive logs and
plan your future dives. With DM5 you can customize your Suunto EON Core and update the
device firmware. Download Suunto DM5 from www.suunto.com/dm5.
NOTE: Mono framework is required when using DM5 on a Mac.
3.29.1. Synchronizing logs and settings
To be able to synchronize logs and settings, you need to first install Suunto DM5 (see 3.29.
Suunto DM5).
To download logs from your Suunto EON Core and sync settings:
1. Start Suunto DM5. If you are also using Suunto Moveslink, exit Moveslink before
proceeding.
2. Connect your Suunto EON Core to your computer with the USB cable.
3. Wait for the syncing to complete.
New dive logs appear in the DM5 Dives list on the left sorted by date and time.
3.29.2. Updating firmware
Suunto DM5 is required to install new firmware for your Suunto EON Core. If a new firmware
version is available, you are notified when connection is established between your Suunto
EON Core and DM5.
Before updating the firmware, make sure the USB is securely connected. The cable must not
be unplugged until update process is completed.
Watch the video on YouTube.
To update firmware:
1. Select Suunto EON Core from the devices list in DM5.
2. Synchronize if needed.
3. Click update and wait for the update process to complete. This may take up to 10 minutes.
3.30. Suunto Fused RGBM
Suunto's decompression model development originates from the 1980s when Suunto
implemented Bühlmann's model based on M-values in Suunto SME. Since then research and
development has been ongoing with the help of both external and internal experts.
In the late 1990s, Suunto implemented Dr. Bruce Wienke's RGBM (Reduced Gradient Bubble
Model) bubble model to work with the earlier M-value based model. The first commercial
products with the feature were the iconic Suunto Vyper and Suunto Stinger. With these
products the improvement of diver safety was significant as they addressed a number of
diving circumstances outside the range of dissolved-gas-only models by:
•
•
•
•
•
32
Monitoring continuous multiday diving
Computing closely spaced repetitive diving
Reacting to a dive deeper than the previous dive
Adapting to rapid ascents which produce high microbubble (silent-bubble) build-up
Incorporating consistency with real physical laws for gas kinetics
Suunto EON Core
In Suunto Fused™ RGBM the tissue half-times are derived from Wienke’s FullRGBM where
human body is modeled by fifteen different tissue groups. FullRGBM can utilize these
additional tissues and model the on-gassing and off-gassing more accurately. The amounts of
nitrogen and helium on-gassing and off-gassing in the tissues are calculated independently
from each other.
The advantage of Suunto Fused RGBM is additional safety through its ability to adapt to a
wide variety of situations. For recreational divers it may offer slightly longer no- deco times,
depending on the chosen personal setting. For open-circuit technical divers it allows use of
gas mixes with helium - on deeper and longer dives helium based gas mixes provide shorter
ascent times. And finally, for rebreather divers the Suunto Fused RGBM algorithm gives the
perfect tool to be used as a non-monitoring, set point dive computer.
3.30.1. Diver safety
Because any decompression model is purely theoretical and does not monitor the actual
body of a diver, no decompression model can guarantee the absence of DCS. Experimentally
it has been shown that the body adapts to decompression to some degree when diving is
constant and frequent. Two personal adjustment settings (P-1 and P-2) are available for divers
who dive constantly and are ready to accept greater personal risk.
CAUTION: Always use the same personal and altitude adjustment settings for the actual
dive and for the planning. Increasing the personal adjustment setting from the planned
setting as well as increasing the altitude adjustment setting can lead to longer
decompression times deeper and thus to larger required gas volume. You can run out of
breathing gas underwater if the personal adjustment setting has been changed after dive
planning.
3.30.2. Altitude diving
The atmospheric pressure is lower at high altitudes than at sea level. After traveling to a
higher altitude, you will have additional nitrogen in your body, compared to the equilibrium
situation at the original altitude. This 'additional' nitrogen is released gradually over time and
equilibrium is restored. It is recommended that you acclimatize to a new altitude by waiting at
least three hours before making a dive.
Before high-altitude diving, you need to adjust the altitude settings of your dive computer so
that the calculations take into account the high altitude. The maximum partial pressures of
nitrogen allowed by the mathematical model of the dive computer are reduced according to
the lower ambient pressure.
As a result, the allowed no decompression stop limits are considerably reduced.
WARNING: SET THE CORRECT ALTITUDE SETTING! When diving at altitudes greater
than 300 m (1000 ft), the altitude setting must be correctly selected in order for the computer
to calculate the decompression status. The dive computer is not intended for use at altitudes
greater than 3000 m (10000 ft). Failure to select the correct altitude setting or diving above
the maximum altitude limit will result in erroneous dive and planning data.
3.30.3. Oxygen exposure
The oxygen exposure calculations are based on currently accepted exposure time limit tables
and principles. In addition to this, the dive computer uses several methods to conservatively
estimate the oxygen exposure. For example:
33
Suunto EON Core
•
•
•
The displayed oxygen exposure calculations are raised to the next higher percentage
value.
The CNS% limits up to 1.6 bar (23.2 psi) are based on 1991 NOAA Diving Manual limits.
The OTU monitoring is based on the long-term daily tolerance level and the recovery rate
is reduced.
Oxygen related information displayed by the dive computer is also designed to ensure that all
warnings and displays occur at the appropriate phases of a dive. For example, the following
information is provided before and during a dive when the computer is set in Air/Nitrox or
Trimix:
•
The selected O2% (and possible helium %)
•
•
CNS% and OTU
Audible notification when CNS% reaches 80%, then notification when 100% limit is
exceeded
Notifications when OTU reaches 250 and then again when 300 limit is exceeded
Audible alarm when pO2 value exceeds the preset limit (pO2 high alarm)
•
Audible alarm when pO2 value is < 0.18 (pO2 low alarm)
•
•
WARNING: WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE MAXIMUM
LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE ACTION TO REDUCE OXYGEN
EXPOSURE. Failure to take action to reduce oxygen exposure after a CNS%/OTU warning is
given can rapidly increase the risk of oxygen toxicity, injury, or death.
3.31. Tank pressure
Your Suunto EON Core can be used with multiple Suunto Tank PODs for wireless tank
pressure transmission.
To install and pair a Suunto Tank POD:
1.
2.
3.
4.
5.
Install the Tank POD as described in the Tank POD quick guide.
Wait for green LED on Tank POD to flash.
If your Suunto EON Core has a blank screen, press any key to activate it.
Hold your Suunto EON Core close to the Tank POD.
After a few seconds, a menu pops up on the screen showing the Tank POD serial number,
battery status and the tank pressure. From the menu, select the correct gas for that Tank
POD.
WARNING: The battery level indication shown when pairing the Tank POD is an
approximation only. The POD battery may deplete faster than the indication suggests.
Repeat the procedure above for additional Tank PODs and select different gases for each
POD.
NOTE: You cannot pair another Tank POD unless you have a second gas defined in
Suunto EON Core.
Alternatively, you can select which Tank POD to use with each gas by selecting a Tank POD
for the gas in question in the Gas(es) menu. When using this method, ensure the Tank POD
has been activated by ensuring there is tank pressure reading in screen and that it is within
range. In the menu, the Tank POD is identified by the serial number printed on the Tank POD.
34
Suunto EON Core
In the dive main views, only one tank pressure is shown and corresponds to the active gas.
When the gas is changed, the displayed tank pressure is also changed accordingly.
WARNING: If there are several divers using Tank PODs, always check before you dive
that the POD number of your selected gas corresponds to the serial number on your POD.
TIP: Remove pressure from the Tank POD when not diving to save battery life.
3.32. Timer
Suunto EON Core has a timer that can be used for timing specific actions during surface or
dive. The timer is shown in bottom-right corner as scrollable item.
NOTE: The timer can also be customized to be as an analog watch in the center of the
display.
To use the timer:
1. While diving, press upper button to start the timer.
2. Press again the upper button to pause the timer.
3. Keep the upper button pressed to reset the timer.
Timer start and stop actions are saved to the dive log.
3.33. Water contacts
The water contact is located on the side of the case near the USB cable port. When
submerged, the water contact poles are connected by the conductivity of the water. Suunto
EON Core switches to dive state when water is detected and the depth gauge senses water
pressure at 1.2 m (4 ft).
35
Suunto EON Core
4. Care and support
4.1. Handling guidelines
Handle Suunto EON Core with care. The sensitive internal electronic components may be
damaged if the device is dropped or otherwise mishandled.
When travelling with this dive computer, ensure that it is packed securely in check-in or carryon luggage. It should be placed in a bag or other container where it cannot move around
bumped or easily hit.
Do not try to open or repair Suunto EON Core by yourself. If you are experiencing problems
with the device, please contact your nearest authorized Suunto Service Center.
WARNING: ENSURE THE WATER RESISTANCE OF THE DEVICE! Moisture inside the
device and/or battery compartment may seriously damage the unit. Only an authorized
Suunto Service Center should do service activities.
Wash and dry the dive computer after use. Rinse very carefully after any salt-water dive.
Pay special attention to the pressure sensor area, water contacts, pushers, and USB cable
port. If you use the USB cable before washing the dive computer, the cable (device end)
should be rinsed as well.
After use, rinse it with fresh water, mild soap, and carefully clean the housing with a moist soft
cloth or chamois.
NOTE: Do not leave your Suunto EON Core in a bucket of water (for rinsing). The display
stays on under water and consumes battery life.
Use only original Suunto accessories - damage caused by non-original accessories is not
covered by warranty.
WARNING: Do not use compressed air or high pressure water hoses to clean your dive
computer. These can permanently damage the pressure sensor in your dive computer.
TIP: Remember to register your Suunto EON Core at www.suunto.com/register to get
personalized support.
4.2. Installing scratch guard
Use the provided scratch guard to help protect your Suunto EON Core from scratches.
To install the scratch guard:
1.
2.
3.
4.
5.
Ensure the display glass is clean and dry.
Peel back the protective layer from one end of the scratch guard.
Place exposed adhesive side down squarely on one end of the display.
Pull back the protective layer from the scratch guard.
Press out any air bubbles with a soft, straight edge tool.
Watch the video on YouTube.
36
Suunto EON Core
4.3. Changing strap to bungee
You can change between the wrist strap and bungee as needed. The bungee is provided as
an option.
To install the bungee:
1.
2.
3.
4.
Remove both strap ends and take the springbars out of the strap ends.
Insert the springbars into the bungee adapters and attach the bungee adapters.
Thread the cord through both adapters.
Securely tie the ends of the bungee cord and cut off excess cord.
4.4. Charging battery
Charge Suunto EON Core with the supplied USB cable. If the battery is very low, the display
remains dark while charging until the battery has reached an adequate charge level. A red
LED blinks next to the display when the device is charging.
CAUTION: DO NOT use the USB cable when Suunto EON Core is wet. This may cause
an electrical failure. Ensure the cable connector and connector pin area on the device are
both dry. If you are using a protective boot, remove the boot from the connector pin area to
clear any residual water droplets.
NOTE: When connected, you may experience a tingling sensation when touching a
metallic computer housing and Suunto EON Core. This is caused by a minor electrical current
created when the wall plug to the computer is not grounded.
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.
Rechargeable batteries have a limited number of charge cycles and may eventually need to
be replaced. The battery should be replaced only by authorized Suunto Service Centers.
4.5. Getting support
To get additional support, visit www.suunto.com/support. There you will find a comprehensive
range of support materials, including Questions and Answers and instruction videos. You can
also post questions directly to Suunto or email/call Suunto support professionals.
37
Suunto EON Core
There are also many how-to videos on the Suunto YouTube channel at www.youtube.com/
user/MovesCountbySuunto.
We recommend registering your product at www.suunto.com/support/ to get the best
personalized support from Suunto.
To get support from Suunto:
1. First visit Suunto.com (www.suunto.com/support) to see if you question has been asked/
answered already.
2. If you cannot find an answer to your question online, submit a question using the form
available at suunto.com/support.
3. Call Suunto. See the latest list of numbers on the last page of this guide or at
www.suunto.com/support. Suunto’s qualified customer support staff will help you and, if
needed, troubleshoot your product during the call.
4.6. Disposal and recyling
Please dispose of the device in accordance with local laws and regulations for electronic
waste and batteries. Do not throw the device away with normal household garbage. If you
wish, you may return the device to your nearest Suunto dealer.
The symbol below indicates that within the European Union, this device must be disposed of
according to the directive for Waste Electrical & Electronic Equipment (WEEE). Please follow
the local practices of member states for the collection of electronic waste.
The proper collection and recycling of batteries and electronic devices helps conserve
resources and minimizes their impact on the environment.
38
Suunto EON Core
5. Reference
5.1. Technical specifications
Dimensions and weight:
•
•
•
•
Length: 80 mm / 3.15 in
Width: 55 mm / 2.17 in
Height: 21 mm / 0.83 in
Weight: 154 g / 5.43 oz
Operating conditions
•
•
•
•
Normal altitude range: 0 to 3,000 m / 10,000 ft above sea level
Operating temperature: 0°C to 40°C / 32°F to 104°F
Storage temperature: -20°C to +50°C / -4°F to +122°F
Maintenance cycle: 500 hours of diving or two years, whichever comes first
NOTE: Do not leave the dive computer in direct sunlight!
Depth gauge
•
•
•
•
Temperature compensated pressure sensor
Accurate to 80 m (262 ft) complying with EN 13319
Depth display range: 0 to 300 m (0 to 984 ft)
Resolution: 0.1 m from 0 to 100 m (1 ft from 0 to 328 ft)
Temperature display
•
•
•
Resolution: 1°C / 1.5 °F
Display range: -20 to +50°C/-4 to +122°F
Accuracy: ± 2°C/± 3.6°F within 20 minutes of temperature change
Displays in mixed gas dive mode
•
•
•
•
•
Helium %: 0–95
Oxygen %: 5–99
Oxygen partial pressure display: 0.0–3.0 bar
CNS%: 0–500% with 1% resolution
OTU: 0-500
Other displays
•
•
•
•
Dive time: 0 to 999 min
Surface time: 0 to 99 h 59 min
Dive counter: 0 to 99 for repetitive dives
No-decompression time: 0 to 99 min (>99 above 99)
39
Suunto EON Core
•
•
Ascent time: 0 to 999 min (- - after 999)
Ceiling depths: 3.0 to 150 m / 10 to 492 ft
Calendar clock
•
•
Accuracy: ± 25 s/month (at 20°C/68°F)
12/24 h display
Compass
•
•
•
•
Accuracy: +/- 15°
Resolution: 1°
Max. tilt: 45 degrees
Balance: global
Timer
•
•
•
Accuracy: 1 second
Display range: 0’00 – 99’59
Resolution: 1 second
Logbook
•
•
Sample rate. 10 seconds
Memory capacity: approximately 200 hours of diving
Tissue calculation model
•
•
•
•
•
•
Suunto Fused™ RGBM algorithm (developed by Suunto and Bruce R. Wienke, BSc, MSc,
PhD)
15 tissue compartments
Tissue compartment halftimes for nitrogen: 1, 2, 5, 10, 20, 40, 80, 120, 160, 240, 320, 400,
480, 560 and 720 min. The on-gassing and off-gassing halftimes are the same.
Tissue compartment halftimes are divided by a constant factor to obtain helium halftimes.
Reduced gradient (variable) M-values based on diving habit and dive violations. The Mvalues are tracked up to 100 hours after a dive
The exposure calculations (CNS% and OTU) are based on recommendations by R.W.
Hamilton, PhD and currently accepted exposure time limit tables and principles.
Battery
•
•
Type: rechargeable lithium-ion
Battery life: fully charged, min. 16h dive time
The following conditions have an effect on the expected battery lifetime:
•
40
The conditions in which the unit is operated and stored (for example, temperature/cold
conditions). Below 10°C/50°F the expected battery lifetime is about 50- 75% of that at
20°C/68°F.
Suunto EON Core
•
The quality of the battery. Some lithium batteries may exhaust unexpectedly, which cannot
be tested in advance.
NOTE: Low temperature or an internal oxidation of the battery may activate the battery
warning even though the battery has enough capacity. In this case, the warning usually
disappears when the dive mode is activated again.
Radio transreceiver
•
•
•
•
BluetoothⓇ Smart compatible
Frequency band: 2402-2480 MHz
Maximum output power: <4 dBm
Range: ~3 m/9.8 ft
Underwater radio transreceiver
•
•
•
Frequency band: single channel 123 kHz
Maximum output power: 360 mW
Range: 1.5 m / 4.9 ft
Manufacturer
Suunto Oy
Tammiston kauppatie 7 A
FI-01510 Vantaa FINLAND
5.2. Compliance
5.2.1. EU radio directive
Hereby, Suunto Oy, declares that the radio equipment type DW171 is in compliance with
Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the
following internet address: www.suunto.com/EUconformity.
5.2.2. EU Personal Protective Equipment
The combination of Suunto EON Core and Suunto Tank POD is a personal protective
equipment under the directive 89/686/EEC. The notified body no. 0078, Institut National de la
Plongée Professionnelle, Entrée 3 - Port de la Pointe Rouge, 13008 MARSEILLE, France, has
completed the EC type-examination to the combination mentioned above and assured the
conformity with the European standard EN250:2014. The certification is up to the depth of
50m as defined in the EN250:2014.
5.2.3. EU depth gauge standard
EN13319 is a European diving depth gauge standard. Suunto dive computers are designed to
comply with this standard.
41
Suunto EON Core
5.2.4. FCC compliance
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause
undesired operation. This product has been tested to comply with FCC standards and is
intended for home or office use.
Changes or modifications not expressly approved by Suunto could void your authority to
operate this device under FCC regulations.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
•
•
•
•
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
Consult the dealer or an experienced radio/TV technician for help.
5.2.5. IC
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is
subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired
operation of the device.
5.3. Trademark
Suunto EON Core, its logos, and other Suunto brand trademarks and made names are
registered or unregistered trademarks of Suunto Oy. All rights are reserved.
5.4. Patent notice
This product is protected by pending patent applications and their corresponding national
rights: US 13/803,795, US 13/832,081, US 13/833,054, US 14/040,808, US 7,349,805, and US
86608266.
Additional patent applications may be filed.
5.5. International Limited Warranty
Suunto warrants that during the Warranty Period Suunto or a Suunto Authorized Service
Center (hereinafter Service Center) will, at its sole discretion, remedy defects in materials or
42
Suunto EON Core
workmanship free of charge either by a) repairing, or b) replacing, or c) refunding, subject to
the terms and conditions of this International Limited Warranty. This International Limited
Warranty is valid and enforceable regardless of the country of purchase. The International
Limited Warranty does not affect your legal rights, granted under mandatory national law
applicable to the sale of consumer goods.
Warranty Period
The International Limited Warranty Period starts at the date of original retail purchase.
The Warranty Period is two (2) years for Products and Dive wireless transmitters unless
otherwise specified.
The Warranty Period is one (1) year for accessories including but not limited to wireless
sensors and transmitters, chargers, cables, rechargeable batteries, straps, bracelets and
hoses.
For all Suunto Spartan watches purchased in 2016 the Warranty Period has been extended to
three (3) years.
The Warranty Period is five (5) years for failures attributable to the depth measurement
(pressure) sensor on Suunto Dive Computers.
Exclusions and Limitations
This International Limited Warranty does not cover:
1.
a. normal wear and tear such as scratches, abrasions, or alteration of the color and/or
material of non-metallic straps, b) defects caused by rough handling, or c) defects or
damage resulting from use contrary to intended or recommended use, improper care,
negligence, and accidents such as dropping or crushing;
2. printed materials and packaging;
3. defects or alleged defects caused by use with any product, accessory, software and/or
service not manufactured or supplied by Suunto;
4. non-rechargeable batteries.
Suunto does not warrant that the operation of the Product or accessory will be uninterrupted
or error free, or that the Product or accessory will work with any hardware or software
provided by a third party.
This International Limited Warranty is not enforceable if the Product or accessory:
1. has been opened beyond intended use;
2. has been repaired using unauthorized spare parts; modified or repaired by unauthorized
Service Center;
3. serial number has been removed, altered or made illegible in any way, as determined at
the sole discretion of Suunto; or
4. has been exposed to chemicals including but not limited to sunscreen and mosquito
repellents.
Access to Suunto warranty service
You must provide proof of purchase to access Suunto warranty service. You must also register
your product online at www.suunto.com/register to receive international warranty services
43
Suunto EON Core
globally. For instructions how to obtain warranty service, visit www.suunto.com/warranty,
contact your local authorized Suunto retailer, or call Suunto Contact Center.
Limitation of Liability
To the maximum extent permitted by applicable mandatory laws, this International Limited
Warranty is your sole and exclusive remedy and is in lieu of all other warranties, expressed or
implied. Suunto shall not be liable for special, incidental, punitive or consequential damages,
including but not limited to loss of anticipated benefits, loss of data, loss of use, cost of
capital, cost of any substitute equipment or facilities, claims of third parties, damage to
property resulting from the purchase or use of the item or arising from breach of the warranty,
breach of contract, negligence, strict tort, or any legal or equitable theory, even if Suunto
knew of the likelihood of such damages. Suunto shall not be liable for delay in rendering
warranty service.
5.6. Copyright
Copyright © Suunto Oy. All rights reserved. Suunto, Suunto product names, their logos and
other Suunto brand trademarks and names are registered or unregistered trademarks of
Suunto Oy. This document and its contents are proprietary to Suunto Oy and are intended
solely for the use of clients to obtain knowledge and information regarding the operation of
Suunto products. Its contents shall not be used or distributed for any other purpose and/or
otherwise communicated, disclosed or reproduced without the prior written consent of
Suunto Oy. While we have taken great care to ensure that information contained in this
documentation is both comprehensive and accurate, no warranty of accuracy is expressed or
implied. This document content is subject to change at any time without notice. The latest
version of this documentation can be downloaded at www.suunto.com.
5.7. Dive terms
Term
Explanation
Altitude dive
A dive made at an elevation greater than 300 m (1000
ft) above sea level.
Ascent rate
The speed at which the diver ascends toward the
surface.
Ascent time
The minimum amount of time needed to reach the
surface on a decompression stop dive.
CCR
Closed-Circuit Rebreather. Scuba that recycles all
exhaled gas.
Ceiling
On a decompression stop dive, the shallowest depth to
which a diver may ascend based on computed inert gas
load.
CNS
Central nervous system toxicity. Toxicity is caused by
oxygen. Can cause a variety of neurological symptoms.
The most important of which is an epileptic-like
convulsion which can cause a diver to drown.
44
Suunto EON Core
Term
Explanation
CNS%
Central nervous system toxicity limit fraction.
Compartment
See Tissue group
DCS
Decompression sickness/illness. Any of a variety of
maladies resulting either directly or indirectly from the
formation of nitrogen bubbles in tissues or body fluids,
as a result of inadequately controlled decompression.
Decompression
Time spent at a decompression stop, or range, before
surfacing, to allow absorbed nitrogen to escape
naturally from tissues.
Decompression range
On a decompression stop dive, the depth range
between the floor and the ceiling within which a diver
must stop for some time during ascent.
Dive series
A group of repetitive dives between which the dive
computer indicates some nitrogen loading is present.
When nitrogen loading reaches zero the dive computer
deactivates.
Dive time
Elapsed time between leaving the surface to descend,
and returning to the surface at the end of a dive.
Floor
The deepest depth during a decompression stop dive at
which decompression takes place.
He%
Helium percentage or helium fraction in the breathing
gas.
MOD
Maximum operating depth of a breathing gas is the
depth at which the partial pressure of oxygen (pO2) of
the gas mix exceeds a safe limit.
Multi level dive
A single or repetitive dive that includes time spent at
various depths and therefore has no decompression
limits that are not determined solely by the maximum
depth reached.
Nitrox (Nx)
In sports diving, refers to any mix with a higher fraction
of oxygen than standard air.
No deco
No decompression stop time. The maximum amount of
time a diver may remain at a particular depth without
having to make decompression stops during the
subsequent ascent.
No decompression dive
Any dive which permits a direct, uninterrupted ascent to
the surface at any time.
45
Suunto EON Core
Term
Explanation
No dec time
Abbreviation for no decompression time limit.
OC
Open-circuit. Scuba that exhausts all exhaled gas.
OTU
Oxygen tolerance unit. Used to measure the wholebody-toxicity, caused by prolonged exposure to high
oxygen partial pressures. The most common symptoms
are irritation in the lungs, a burning sensation in the
chest, coughing and reduction of the vital capacity.
O2%
Oxygen percentage or oxygen fraction in the breathing
gas. Standard air has 21% oxygen.
pO2
Partial pressure of oxygen. Limits the maximum depth to
which the nitrox mixture can be safely used. The
maximum partial pressure limit for enriched air diving is
1.4 bar. The contingency partial pressure limit is 1.6 bar.
Dives beyond this limit risk immediate oxygen toxicity.
Repetitive dive
Any dive whose decompression time limits are affected
by residual nitrogen absorbed during previous dives.
Residual nitrogen
The amount of excess nitrogen remaining in a diver
after one or more dives.
RGBM
Reduced gradient bubble model. Modern algorithm for
tracking both dissolved and free gas in divers.
SCR
Semi-closed rebreather. Scuba that recycles a portion of
exhaled gas.
Scuba
Self-contained underwater breathing apparatus.
Surface time
Elapsed time between surfacing from a dive and
beginning a descent for the subsequent dive.
Tissue group
Theoretical concept used to model bodily tissues for the
construction of decompression tables or calculations.
Trimix
A breathing gas mix of helium, oxygen and nitrogen.
46
Suunto EON Core
47
SUUNTO CUSTOMER SUPPORT
1.
www.suunto.com/support
www.suunto.com/register
2. AUSTRALIA (24/7)
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SWITZERLAND
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Manufacturer:
Suunto Oy
Tammiston kauppatie 7 A,
FI-01510 Vantaa FINLAND
© Suunto Oy
Suunto is a registered trademark of Suunto Oy. All Rights reserved.
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