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23821
Users Guide
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Suunto 23821 Users Guide

SUUNTO EON CORE
USER GUIDE
2017-06-12
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
3. Features..........................................................................................................................................................9
3.1. Alarms, warnings and
notifications...............................................................................................9
3.2. Ascent rate....................................................................................................................................... 10
3.3. Algorithm lock...................................................................................................................................11
3.4. Battery.................................................................................................................................................11
3.5. Bookmark..........................................................................................................................................12
3.6. Calendar clock.................................................................................................................................12
3.7. Compass............................................................................................................................................13
3.8. Customization..................................................................................................................................14
3.9. Decompression dives....................................................................................................................16
3.10. Display brightness.........................................................................................................................18
3.11. Dive history...................................................................................................................................... 18
3.12. Dive modes.....................................................................................................................................19
3.13. Dive planner....................................................................................................................................19
3.14. Flip display.....................................................................................................................................20
3.15. Gas consumption......................................................................................................................... 20
3.16. Gas time...........................................................................................................................................21
3.17. Gas mixtures....................................................................................................................................21
3.18. Language and unit system.........................................................................................................22
3.19. Logbook..........................................................................................................................................22
3.20. Multi-gas diving............................................................................................................................23
3.21. Movescount mobile app.............................................................................................................23
3.22. Personal and altitude adjustments.........................................................................................24
3.23. Oxygen calculations...................................................................................................................25
3.24. Rebreather diving........................................................................................................................25
3.25. Safety stops and deepstops.................................................................................................... 28
3.26. Sample rate...................................................................................................................................28
3.27. Standby and deep sleep............................................................................................................28
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3.28. Surface and no-fly time..............................................................................................................29
3.29. Suunto DM5 and Movescount.................................................................................................29
3.30. Suunto Fused RGBM..................................................................................................................29
3.31. Tank pressure................................................................................................................................30
3.32. Timer................................................................................................................................................31
3.33. Water contacts..............................................................................................................................32
4. Care and support....................................................................................................................................... 33
4.1. Handling guidelines....................................................................................................................... 33
4.2. Water resistance.............................................................................................................................33
4.3. Installing scratch guard................................................................................................................ 33
4.4. Charging battery............................................................................................................................ 34
4.5. Changing strap to bungee.......................................................................................................... 34
4.6. Getting support.............................................................................................................................. 35
5. Reference.....................................................................................................................................................36
5.1. Technical specifications................................................................................................................36
5.2. Compliance..................................................................................................................................... 38
5.2.5. ISED............................................................................................................................................39
5.5. International Limited Warranty...................................................................................................39
5.6. Copyright......................................................................................................................................... 40
5.7. Dive terms......................................................................................................................................... 41
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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 the dive computer, contact your Suunto dealer before diving with the dive computer. Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY!
Safety precautions
WARNING: ONLY TRAINED DIVERS SHOULD USE A DIVE COMPUTER! Insucient training for any kind of diving, including freediving, may cause a diver to commit errors, such as incorrect use of gas mixtures or improper decompression, that may lead to serious injury or death.
WARNING: You must read the printed quick guide and online user guide for your dive computer. Failure to do so may lead to improper use, serious injury or death.
WARNING: THERE IS ALWAYS A RISK OF DECOMPRESSION SICKNESS (DCS) FOR ANY DIVE PROFILE EVEN IF YOU FOLLOW THE DIVE PLAN PRESCRIBED BY DIVE TABLES OR A DIVE COMPUTER. NO PROCEDURE, DIVE COMPUTER OR DIVE TABLE WILL PREVENT THE POSSIBILITY OF DCS OR OXYGEN TOXICITY! An individual’s physiological make up can vary from day to day. The dive computer cannot account for these variations. You are strongly advised to remain well within the exposure limits provided by the instrument to minimize the risk of DCS. As an added measure of safety, you should consult a physician regarding your fitness before diving.
WARNING: If you have a pacemaker, we recommend you do not scuba dive. Scuba diving creates physical stresses on the body which may not be suitable for pacemakers.
WARNING: If you have a pacemaker, consult a doctor before using this device. The inductive frequency used by the device may interfere with pacemakers.
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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.
ARNING: USE BACKUP INSTRUMENTS! Ensure that you use backup instrumentation,
W
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 there is any apparent malfunction, abort the dive immediately and safely return to the surface
.
WARNING: THE DIVE COMPUTER SHOULD NEVER BE TRADED OR SHARED BETWEEN USERS WHILE IT IS IN OPERATION! Its information will not apply to someone who has not been wearing it throughout a dive
, or sequence of repetitive dives. Its dive profiles must match that of the user. If it is left on the surface during any dive, the dive computer will give inaccurate information for subsequent dives. No dive computer can take into account dives made without the computer. Thus, any diving activity up to four days prior to initial use of the computer may cause misleading information and must be avoided.
WARNING: DO NOT EXPOSE ANY PART OF YOUR DIVE COMPUTER TO ANY GAS MIX
CONT
AINING MORE THAN 40% OXYGEN! Enriched air with greater oxygen content presents
a risk of fire or explosion and serious injury or death.
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 mix
ed 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.
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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.
ARNING: Do not use Suunto USB cable if cable or parts are damaged.
W
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 Change the view by pressing the middle button.
NOTE: Main views can be customized. See Customization.
Suunto EON Core automatically switches between surface and dive state 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:
has two main views in surface and dive states: time/no deco and compass.
. If you are more
•
Present depth is 19.0 m
•
Active gas is Nitro
•
Dive time is 22 minutes
•
Tank pressure left is 120 bar
•
No decompression time is 50 minutes
•
Safety stop is ahead at 3.0 meters
•
21 hours of diving time left before need to recharge
x 32%

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
Tank / gas pressure information
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Tank POD alert (device is not receiving signal from Tank POD)

2.3. Set up

To get the most out of your Suunto EON Core, use some time to customize features and displays. Mak before getting into the water.
To get started
1. Wake up the device by connecting the USB cable to PC/Mac (or USB power source if
available).
e absolutely sure that you know your computer and have it set up as you want
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.
•
Connecting with DM5 (optional)
dd)
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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
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
. Notifications are always yellow.
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
CNS100% Central nervous system toxicity level at 100% limit
OTU300 Recommended daily limit for Oxygen tolerance unit
reached
Depth Depth exceeds your depth alarm limit
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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. 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
g.
Notifications indicate events that require preventive actions. Acknowledge the notification by pressing any button.
Notification Explanation
CNS80% Central nervous system toxicity level at 80% limit
OTU250 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
3.24.3. Setpoints
Tank POD low battery Tank POD battery life low; battery change required

3.2. Ascent rate

During a dive, the bar on the left indicates ascent rate 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
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. One bar step corresponds to 2 m (6.6
Suunto EON Core
When maximum allowed ascent rate is exceeded for five seconds, an alarm is generated. Ascent rate violations result in longer safety stop times.
WARNING: DO NOT EXCEED THE MAXIMUM ASCENT RATE! Rapid ascents increase the risk of injury 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).
. You should always make the mandatory and recommended safety stops after

3.3. 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 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 value is no longer present.
In this state, you significantly 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. Going to dive mode when algorithm is locked resets the algorithm lock time back to 48 hours when you surface.
LOCKED instead, as shown below. Note that the ceiling
increase your risk of decompression sickness (DCS).

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 either your computer USB port or wall charger.
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.
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Suunto EON Core
Icon Explanation
Estimated remaining dive time is 27 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. Bookmark

Keep the lower button pressed to add a bookmark (timestamp) to the active log for later reference
If you save a bookmark while the compass view is active, the bookmark includes both a timestamp and the current compass heading.
.

3.6. 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. Keep the middle button pressed to enter menu.
2. Browse to General / Device settings / Time & date.
3. Scroll to Set time or Set date with the upper or lower button.
4. Press the middle button to enter the setting.
5. Adjust the setting with the upper or lower button.
6. Press the middle button to move to the next setting.
7. 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. Keep the middle button pressed to enter menu.
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Suunto EON Core
2. Browse to General / Device settings / Units and formats.
3. Scroll to
4. Follow steps 5-8 as above to change and save formats.
Time format or Date format with the upper or lower button.

3.7. Compass

Suunto EON Core includes a tilt-compensated digital compass, available as a main view.

3.7.1. Calibrating compass

When you first start using Suunto EON Core, the compass needs to be calibrated. Suunto EON Core displays the calibration icon when you enter the compass view. Calibrate the compass by slowly rotating the unit in your hand in large
figure-8 loops. Watch the video on 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. Keep the middle button pressed to enter the menu.
2. Browse to General / Compass.
3. Press the middle button to enter Compass.
4. Scroll up or down to select Calibrate.
5. Start calibration by moving the device around in a 3D figure-8 as the image suggests.
6. A sound indicates the calibration succeeded, and the screen goes back to
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.
YouTube.
Compass
3.7
.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 manually start calibration:
1. Keep the middle button pressed to enter the menu.
2. Browse to General / Compass.
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3. Press the middle button to enter Compass.
4. Press the middle button again to enter
5. 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 o, set declination angle to 0.0º.
6. Press middle button to save changes and go back to the Compass menu.
7. Keep the middle button pressed to exit.
Declination.

3.7.3. 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 dierence 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 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. While in surface state, keep the middle button pressed to enter the main menu.
2. Scroll to GENERAL with the upper or lower buttons and press the middle button.
3. Press the middle button to enter Compass.
4. Select Clear bearing with the middle button.
5. Keep the middle button pressed to exit.
. Each bearing

3.8. Customization

You can customize Suunto EON Core views and features with Suunto DM5. Create up to 10 dierent dive modes with up to four custom views each.
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