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Suunto HELO2 - page 1
EN USER’S GUIDE HelO 2 ...
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Suunto HELO2 - page 2
T ank Pressure Bar Graph (Mixed Gas Mode) Gas Mix Selection (Mixed Gas Mode) O 2 % | He% (Mixed Gas Mode) ...
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Suunto HELO2 - page 3
1. WELCOME TO THE WORLD OF SUUNT O DIVING INSTRUMENTS . . . . . . . . . . . . . . . . 5 1.1. Using HelO 2 w i t h D i v e M a n a g e r a n d D i v e P l a n n e r ................................. 5 2 . W A R N I N G S , C A U T I O N S , A N D N O T E S ................................................... 6 3. SUUNTO HelO 2 A T A G L A N C E ..... ...
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Suunto HELO2 - page 4
6 . 1 . 5 . D e c o m p r e s s i o n d i v e s ........................................................... 2 8 6 . 2 . D i v i n g i n M I X E D G A S m o d e ......................................................... 3 1 6 . 2 . 1 . B e f o r e d i v i n g i n M I X E D G A S m o d e ............................................ 3 1 6 . 2 . 2 . O x ...
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Suunto HELO2 - page 5
1. WELCOME TO THE WORLD OF SUUNTO DIVING INSTRUMENTS Suunto HelO 2 was designed to help you get the most out of your diving. With easy-to-use PC dive planner and gas switching, Suunto HelO 2 simplifies your diving experience because all the information you need relating to depth, time, tank pressure, and decompression status is available on one eas ...
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Suunto HELO2 - page 6
2. W ARNINGS, CAUTIONS, AND NOTES Throughout this manual, important safety icons are displayed. Three classifications are used to separate these icons by their order of importance: W ARNING is used in connection with a procedure or situation that could result in serious injury or death CAUTION is used in connection with a procedure or situation tha ...
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Suunto HELO2 - page 7
W ARNING DIVES THA T REQUIRE DECOMPRESSION STOPS ARE NOT RE- COMMENDED. YOU SHOULD ASCEND AND BEGIN DECOMPRES- SION IMMEDIA TEL Y WHEN THE DIVE COMPUTER SHOWS YOU THA T A DECOMPRESSION STOP IS REQUIRED! Note the blinking ASC TIME symbol and the upward pointing arrow . W ARNING USE BACK-UP INSTRUMENTS! Make sure that you use back-up instrumentation, ...
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Suunto HELO2 - page 8
W ARNING SELECT THE CORRECT AL TITUDE ADJUSTMENT SETTING! When diving at altitudes greater than 300 m/1,000 ft the Altitude Adjustment feature must be correctly selected in order for the computer to calcu- late the decompression status. The dive computer is not intended for use at altitudes greater than 3,000 m/10,000 ft. Failure to select the corr ...
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Suunto HELO2 - page 9
3. SUUNTO HELO2 A T A GLANCE 3.1. Navigating in the menus Suunto HelO 2 has four main operating modes: 1. TIME mode 2. DIVE mode (MIXED GAS, GAUGE) 3. PLAN mode (NODEC) 4. MEMORY mode (HIST ORY , LOGBOOK) T o toggle between the main modes, press the MODE button. T o select a submode in DIVE and MEMORY modes, press the UP/DOWN buttons. Gases Depth A ...
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Suunto HELO2 - page 10
Main functions Press Button Symbol Enter Setting mode Long DOWN 10 ...
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Suunto HELO2 - page 11
4. GETTING ST ARTED WITH YOUR SUUNTO HELO2 T o get the most out of your Suunto HelO 2 , take some time to personalize it and really make it YOUR computer . Set the correct time and date, tones, unit and backlight settings. Suunto HelO 2 is a very user-friendly dive computer , and you will quickly become familiar with its functions. Make absolutely ...
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Suunto HELO2 - page 12
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.4. Setting the backlight Use the BACKLIGHT SETTING mode to turn the backlight on or off and to define how long it stays on for (5, 10, 20, 30, or 60 seconds). When the backlight is turned off, it does not illuminate when an alarm sounds. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SEL ...
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Suunto HELO2 - page 13
5. BEFORE DIVING Do not attempt to use the dive computer without reading this user's manual in its entirety , including all the warnings. Make sure that you fully understand the use, displays, and limitations of the instrument. If you have any questions about the manual or the Suunto HelO 2 , please contact your Suunto representative before di ...
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Suunto HELO2 - page 14
YOU ARE ADVISED TO MAKE A DEEPSTOP A T 18 M. THE SECOND INDICA TOR SHOWS THA T YOU HA VE 1 10 SECONDS LEFT OF YOUR DEEPST OP . In order to optimize the response to different increased risk situations, an additional category of stop, referred to as a Mandatory Safety Stop, has been introduced. The combination of stop types depends on the user settin ...
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Suunto HELO2 - page 15
5.6. Audible and visual alarms The dive computer has audible and visual alarms that advise when important limits are approached or that prompt you to acknowledge preset alarms. The table below describes the different alarms and their meanings. T able 5.1. Audible and visual alarm types Alarm reason Alarm indication PO 2 value is greater than the ad ...
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Suunto HELO2 - page 16
Alarm reason Alarm indication The selected depth (3 - 120 m / 10 - 394 ft) is exceeded. Three beeps with a one second interval for 24 seconds. Maximum depth blinks. The fixed maximum depth (120 m / 394 ft) is exceeded. The selected dive time (1 - 999 min) is ex- ceeded. Three beeps with a one second interval for 24 seconds. Dive time blinks. NOTE W ...
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Suunto HELO2 - page 17
Omitted decompression The Error mode results from omitted decompression, i.e. when you stay above the ceiling for more than three minutes. During this three-minute period the Er warning is shown and the audible alarm beeps. After this, the dive computer will enter a permanent Error mode. The instrument will continue to function normally if you desc ...
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Suunto HELO2 - page 18
2. Ensure that the Suunto HelO 2 is turned on, and that the wireless integration is enabled in the Suunto HelO 2 settings (HP set ON, see Section 5.9.8. Setting the HP code ). The HelO 2 should display “cd:--” in the lower left corner of the alternative display . 3. Slowly open the cylinder valve fully and pressurize the regulator . The transmi ...
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Suunto HELO2 - page 19
A B C D E 5.9. MIXED GAS DIVE mode settings Suunto HelO 2 has several user-definable functions, as well as depth and time-related alarms that you can set according to your personal preferences. The DIVE mode settings are dependent on the dive submode chosen (MIXED GAS, GAUGE), so that, for example, gas mix settings are only available in the MIXED G ...
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Suunto HELO2 - page 20
The ASC time is calculated based on the assumption that you start the ascent profile im- mediately and all the PRIMARY gases are changed as soon as their maximum operating depth allows it. That is, using the gases that are set as primary , the most optimal ascent schedule for the moment is calculated. T o see the most pessimistic ascent schedule, t ...
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Suunto HELO2 - page 21
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.9.5. Setting the sample rate The sample rate controls how often the depth, time, tank pressure, and water temperature is stored in the memory . Y ou can set the dive profile sample rate to 10, 20, 30, or 60 seconds. The factory default setting is 20 seconds. ADJUST WITH UP AND DOWN BUTTO ...
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Suunto HELO2 - page 22
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. SELECT T ANK PRESSURE ON. 5.9.9. Setting the units Use Unit Settings to choose between metric (meters/celsius/bar) and imperial (feet/fahrenheit/psi) units. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.10. Activation and pre-checks This section describes how to activate th ...
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Suunto HELO2 - page 23
• the altitude and personal adjustment settings are correct • the instrument displays correct units of measurement (Metric/Imperial) • the instrument displays the correct temperature and depth (0.0 m/0 ft) • the alarm beeps If the optional wireless pressure transmitter is used ensure that: • the pressure transmitter has been properly atta ...
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Suunto HELO2 - page 24
Altitude range Alt. adjustment value 1500 - 3000 m / 5000 - 10 000 ft A2 NOTE Section 5.9.4. Setting the personal/altitude adjustments describes how the Altitude value is set. W ARNING T raveling 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 ...
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Suunto HELO2 - page 25
Desired tables Condition Personal adjust- ment value Progressively more conservative Some risk factors or conditions exist P1 Several risk factors or conditions exist P2 W ARNING Personal adjustment setting P0 – P-2 causes a high risk of DCI, or other personal injury , and death. 5.1 1. Safety Stops Safety Stops are widely considered good diving ...
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Suunto HELO2 - page 26
WHEN CEILING AND STOP ARE DISPLA YED, MAKE A ONE MINUTE MANDA TORY SAFETY STOP IN THE DEPTH ZONE BETWEEN 6 M AND 3 M. Y ou must not ascend shallower than 3 m/10 ft with the Mandatory Safety Stop warning on. If you ascend above the Mandatory Safety Stop ceiling, a downward pointing arrow will appear and a continuous beeping starts. Y ou should immed ...
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Suunto HELO2 - page 27
6. DIVING This section contains instructions on how to operate the dive computer and interpret its displays. Y ou’ll find that this dive computer is easy to use and read. Each display shows only the data relevant to that specific diving mode. 6.1. Diving-related information In this section, we look at how to make the most of the dive computer whe ...
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Suunto HELO2 - page 28
6.1.2. Bookmark It is possible to record bookmarks in the profile memory during a dive. These bookmarks are displayed when scrolling the profile memory on the display . The bookmarks will also be shown as annotations in the downloadable Suunto Dive Manager PC software. The bookmark logs the depth, time, water temperature, and tank pressure when ava ...
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Suunto HELO2 - page 29
The ascent time (ASC TIME) is the minimum amount of time needed to reach the surface in a decompression dive. It includes: • the time needed at the deep stop • the time needed to ascend to the ceiling at an ascent rate of 10 m/33 ft per minute. The ceiling is the shallowest depth to which you should ascend • the time needed at the ceiling • ...
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Suunto HELO2 - page 30
W ARNING NEVER ASCEND ABOVE THE CEILING! Y ou must not ascend above the ceiling during your decompression. In order to avoid doing so by accident, you should stay somewhat below the ceiling. Display below the floor The blinking ASC TIME and an upward pointing arrow indicate that you are below the floor . The ceiling depth is shown on the left side, ...
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Suunto HELO2 - page 31
DECOMPRESSION DIVE, ABOVE CEILING. NOTE DOWNW ARD POINTING ARROW , ER W ARNING AND ALARM. Y OU SHOULD IMMEDIA TL Y (WITHIN 3 MINUTES) DESCEND T O OR BEL OW CEILING. In addition, an Error warning (Er) reminds you that you have only three minutes to correct the situation. Y ou must immediately descend to, or below , the ceiling. If you continue to vi ...
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Suunto HELO2 - page 32
MIXED GAS DIVE MODE ACTIV A TION, MAXIMUM OPERA TIONAL DEPTH BASED ON SET O 2 % (14%), HE 2 % (32%), AND PO 2 (1.4) IS 83.3 M. If set to MIXED GAS mode, the Suunto HelO 2 will additionally show on the alternative display: • the oxygen percentage, labeled O 2 % • the helium percentage, labeled He% • the set oxygen partial pressure limit, label ...
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Suunto HELO2 - page 33
CHANGING GAS MIX. SCROLL THROUGH ENABLED MIXES BY PRESSING THE UP OR DOWN BUTTONS. SELECT NEW MIX BY PRESSING THE SELECT BUTTON. NOTE Mix number , O 2 %, He% and PO 2 for the mixes are shown when scrolling. If the set PO 2 limit is exceeded , it will be shown with the PO 2 value blinking. The dive computer does not allow you to change to a gas whos ...
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Suunto HELO2 - page 34
7. AFTER DIVING Once back at the surface, Suunto HelO 2 continues to provide post-dive safety information and alarms. Calculations to enable repetitive dive planning also help to maximize diver safety . T able 7.1. Alarms Indication Symbol on display Diver Attention Symbol - Extend Surface Interval Violated Decompression Ceiling or T oo Long Bottom ...
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Suunto HELO2 - page 35
7.3. Repetitive dive planning The Suunto HelO 2 includes a dive planner that allows you to review the no-decompression limits on a subsequent dive, taking the residual nitrogen loading of previous dives into consideration. The dive plan mode is not meant for technical dive planning which the Suunto Dive Planner PC software is meant for . However, t ...
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Suunto HELO2 - page 36
By pressing the UP/DOWN buttons, you can scroll the no-decompression limits in 3 m/10 ft increments ending at 45 m/150 ft. No-decompression limits longer than 99min are dis- played as “—“. WHEN ENTERING THE PLANNODEC MODE THE DISPLA Y FIRST BRIEFL Y SHOWS THE REMAINING DESA TURA TION TIME BEFORE GOING INTO PLAN MODE. USE UP AND DOWN BUTTONS T ...
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Suunto HELO2 - page 37
The dive time and date are registered in the Logbook memory . Always check before diving that the time and date are correctly set, especially after traveling between different time zones. 7.6.1. Dive logbook (MEMLogbook) The Suunto HelO 2 has a very sophisticated, high capacity Logbook and Profile Memory . The data is recorded in the profile memory ...
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Suunto HELO2 - page 38
• OLF percentage of MIXED GAS dive Page III • scrolling • dive profile (temperature, depth, tank pressure, gases) NOTE The memory will retain approximately the last 42 hours of dive time. After that, when new dives are added, the oldest dives are deleted. The contents of the memory will remain when the battery is changed (providing that the b ...
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Suunto HELO2 - page 39
NOTE For emergency ascents, always print out the dive plan from Suunto Dive Planner . It ensures that you have a valid decompression schedule at hand in an unlikely event that the dive computer malfunc- tions. For more information about the warnings, such as Isobaric Counterdiffusion (ICD), and settings in Suunto Dive Planner , refer to Suunto Dive ...
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Suunto HELO2 - page 40
The Communities section is meeting a place for smaller groups of SuuntoSports.com members. Here you can create and manage your own communities and search for others. All communities have a home page that lists the latest group activities. Community members can also use group-specific bulletin boards and calendars, create their own link lists and gr ...
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Suunto HELO2 - page 41
8. CARE AND MAINTENANCE OF MY SUUNT O DIVING COMPUTER The SUUNTO dive computer is a sophisticated precision instrument. Although it is designed to withstand the rigors of scuba diving, you must treat it with the same proper care and caution as any other precision instrument. • W A TER CONT ACTS AND PUSH BUTTONS Contamination or dirt on the water ...
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Suunto HELO2 - page 42
The water resistance of the unit must be checked after replacing the battery or after other service operations. The check requires special equipment and training. Y ou must frequently check the display for any sign of leaks. If you find moisture inside your dive computer , there is a leak. A leak must be corrected without delay as moisture will ser ...
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Suunto HELO2 - page 43
9. BA TTER Y REPLACEMENT NOTE It is advisable to contact an authorized Suunto representative for battery replacement. It is imperative that the change is made in a proper manner to avoid any leakage of water into the battery compart- ment or computer . CAUTION Defects caused by improper battery installation are not covered by the warranty . CAUTION ...
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Suunto HELO2 - page 44
1 1. Check that the new lubricated O-ring is in good condition. Put it in the right position on the battery compartment lid. Be very careful not to get any dirt on the o-ring or its sealing surfaces. 12. Carefully press the lid onto the battery compartment with your thumb, while making sure that the O-ring is not at any point protruding out on the ...
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Suunto HELO2 - page 45
CAUTION Defects caused by improper battery installation are not covered by the warranty . 9.4.1. T ransmitter battery kit The transmitter battery kit includes a 3.0 V CR ½ AA lithium cell battery and a lubricated O-ring. When handling the battery , do not make contact with both of the poles at the same time. Do not touch the metal surfaces of the ...
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Suunto HELO2 - page 46
Wireless transmitter parts. The code stands for spare part order number . 46 ...
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Suunto HELO2 - page 47
10. TECHNICAL DA T A 10.1. T echnical specifications Dimensions and weight: • Diameter: 61.0 mm/2.4 in • Thickness: 28 mm/1.1 in • W eight: 68 g/2.4 oz T ransmitter: • Max. diameter: 40 mm/1.57 in • Length: 80 mm/3.15 in • W eight: 1 18 g/4.16 oz • Rated working pressure: 300 bar/4000 psi, maximum allowed pressure 360 bar/5,000 psi ? ...
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Suunto HELO2 - page 48
• Helium halftimes:1, 2, 3.5, 7.5, 15, 30, 45, 90, 181 minutes (on gassing). The of f gassing halftimes are slowed down. • Reduced gradient (variable) "M" values based on diving habit and dive violations. The "M" values are tracked up to 100 hours after a dive • The EAN and oxygen exposure calculations are based on recomme ...
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Suunto HELO2 - page 49
10.2.1. Suunto T echnical RGBM decompression model Suunto's decompression model development originates from the 1980s when Suunto im- plemented Bühlmann's model based on M-values in Suunto SME. Since then research and development has been ongoing with the help of external and internal experts. In the late 1990s Suunto implemented Dr . Br ...
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Suunto HELO2 - page 50
10.2.3. 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 ...
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Suunto HELO2 - page 51
1 1. INTELLECTUAL PROPERTY 1 1.1. Copyright This user's manual is copyrighted and all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, or translated to any media without prior written consent from Suunto. 1 1.2. T rademark Suunto, HelO 2 , Consumed Bottom T ime (CBT), Oxygen Limit Fraction (OLF), Suunto ...
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Suunto HELO2 - page 52
12. DISCLAIMERS 12.1. User ’ s responsibility This instrument is intended for recreational use only . Suunto HelO 2 must not be used for obtaining measurements that require professional or industrial precision. 12.2. CE The CE mark is used to mark conformity with the European Union EMC directive 89/336/EEC FIOH, T opeliuksenkatu 41 a A, FI-00250 ...
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Suunto HELO2 - page 53
13. SUUNTO LIMITED W ARRANTY FOR SUUNTO DIVING COM- PUTERS AND SUUNTO DIVING COMPUTER ACCESSORIES This Limited W arranty is valid as of January 1st, 2007. Suunto Oy ("Suunto") provides this limited warranty to those who have purchased the Suunto Diving computer and/or Suunto diving computer accessories ("Product"). Suunto warran ...
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Suunto HELO2 - page 54
This Limited W arranty is not enforceable if: 1. the Product has been opened, modified or repaired by anyone other than Suunto or a Suunto Authorized Service Centre; 2. the Product has been repaired using unauthorized spare parts; 3. the Product's serial number has been removed, erased, defaced, altered or made il- legible in any way - and thi ...
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Suunto HELO2 - page 55
FROM THE PURCHASE OR USE OF THE PRODUCT OR ARISING FROM BREACH OF THE W ARRANTY , BREACH OF CONTRACT , NEGLIGENCE, STRICT TOR T , OR ANY OTHER LEGAL OR EQUIT ABLE THEORY , EVEN IF SUUNTO KNEW OF THE LIKELIHOOD OF SUCH DAMAGES. SUUNTO SHALL NOT BE LIABLE FOR DELA Y IN RENDERING SERVICE UNDER THE LIMITED W ARRANTY , OR LOSS OF USE DURING THE TIME THE ...
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Suunto HELO2 - page 56
14. DISPOSAL OF THE DEVICE Please dispose of the device in an appropriate way , treating it as electronic waste. Do not throw it in the garbage. If you wish, you may return the device to your nearest Suunto representative. 56 ...
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Suunto HELO2 - page 57
GLOSSAR Y 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. ASC RA TE Abbreviation for ascent rate. Ascent time The minimum amount of time needed to reach the surface on a decompression stop dive. ASC TIME Abbreviation for ascent time. Ceiling O ...
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Suunto HELO2 - page 58
No decompression dive Any dive which permits a direct, uninterrupted ascent to the surface at any time. NO DEC TIME Abbreviation for no decompression time limit. OEA = EAN = EANx Abbreviations for oxygen enriched air nitrox. OLF Abbreviation for oxygen limit fraction. OTU Abbreviation for oxygen tolerance unit. Oxygen tolerance unit Used to measure ...
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Suunto HELO2 - page 59
CUSTOMER SER VICE CONT ACTS Global Help Desk +358 2 284 1 1 60 Suunto USA Phone +1 (800) 543-9124 Canada Phone +1 (800) 267-7506 Suunto website www .suunto.com COPYRIGHT This publication and its contents are proprietary to Suunto Oy . Suunto, Dive Computer , Suunto HelO 2 and thei r logos are registe red or unregistered trademarks of Suunto Oy . Al ...
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Suunto HELO2 - page 60
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Suunto HELO2 - page 61
TWO YEAR WARRANTY T h is p r od uc t is wa r r a nt ed t o be f r ee o f defects in material and/or wor kmanship to the ori gin al own er for the abo ve no ted peri od (d oe s not inc lud e ba tt ery lif e) . K eep a co p y of the original purchase receipt and make sur e to get this warr anty car d stamped a t the place of pur chase. The war ranty ...
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Suunto HELO2 - page 62
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Suunto HELO2 - page 63
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Suunto HELO2 - page 64
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