SUUNTO HELO2 User Manual
en
HelO
2
USER’S GUIDE
Daily Alarm Indicator
Dive Alarm Indicator
No-Fly Icon
Safety Stop Indicator
Tank Pressure Bar
Graph
Wireless Transmitter
Indicator
Present Depth
Active Water Contact
Indicator
Diver Attention Symbol
Current Time Display
Mode Indicator
No-Decompression Time
Total Ascent Time
Ceiling Depth
Deep Stop Ceiling
Safety/Deep Stop Time
Surface Interval Time
No-Fly Time
Gas Mix Selection
Ascent Rate Bar Graph
Date
Maximum Depth
% │He% (Mixed Gas Mode)
O
2
Time
Tank Pressure
Low Battery
Weekday
Dive Time
Temperature
(Mixed Gas Mode)
PO
2
OLF% (Mixed Gas Mode)
1. WELCOME TO THE WORLD OF SUUNTO DIVE COMPUTERS .. ... ... ... ... ... 8
1.1. Using HelO2 with Dive Manager and Dive Planner . .. . .. . ... ... ... ... ... ... ... 9
2. WARNINGS, CAUTIONS, AND NOTES . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... 10
3. SUUNTO HelO2USER INTERFACE . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... . 19
3.1. Navigating in the menus . ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... 19
3.2. Button symbols and functions . . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... 20
4. GETTING STARTED .. ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . .. 22
4.1. TIME mode settings . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. 22
4.1.1. Setting the time ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... 23
4.1.2. Setting the date .. ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... . 23
4.1.3. Setting the units . ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... . 24
4.1.4. Setting the backlight . . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... .. 24
4.1.5. Setting the tones . . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. 24
4.2. AC water contacts . ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... . 25
5. BEFORE DIVING . ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . 27
5.1. Planning your dives . . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . . 28
5.2. The Suunto Technical RGBM . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... . 29
5.3. Emergency ascents . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. 30
5.4. Dive computer limitations ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... 31
5.5. Audible and visual alarms . ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... . 31
5.6. Error conditions . ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... . 34
5.7. Wireless transmission . ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... 36
5.7.1. Installing the wireless transmitter .. ... ... ... ... ... . .. . .. . ... ... ... ... ... ... 36
5.7.2. Pairing and code selection . . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... . 37
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5.7.3. Transmitting data .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . . 39
5.8. MIXED GAS DIVE mode settings .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... . 41
5.8.1. Setting the gases .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . . 42
5.8.2. Setting the depth alarm .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... . 43
5.8.3. Setting the dive-time alarm ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . . 44
5.8.4. Setting the personal/altitude adjustments . .. . .. . .. . ... ... ... ... ... ... ... . 44
5.8.5. Setting the sample rate . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... 45
5.8.6. Setting the tank pressure alarm . ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . . 45
5.8.7. Setting the tank pressure .. ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . .. 46
5.8.8. Setting the HP code . . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. 46
5.8.9. Setting the units . ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... . 47
5.9. Activation and pre-checks ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... .. 47
5.9.1. Accessing DIVE mode ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... . 48
5.9.2. DIVE mode activation .. . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... 48
5.9.3. Battery power indication . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... .. 50
5.9.4. Diving at altitude .. ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... 51
5.9.5. Personal adjustments .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... 52
5.10. Safety Stops . ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. 54
5.10.1. Recommended Safety Stops . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... . 54
5.10.2. Mandatory Safety Stops ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... 55
5.11. Deep stops . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... .. 57
6. DIVING . ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . 58
6.1. Diving-related information . ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . . 58
6.1.1. Basic dive data . ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... .. 59
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6.1.2. Bookmark . ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . . 60
6.1.3. Ascent rate indicator . . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... .. 60
6.1.4. Safety Stops . ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... .. 61
6.1.5. Decompression dives . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... .. 62
6.2. Diving in MIXED GAS mode . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... .. 67
6.2.1. Before diving in the MIXED GAS mode . ... ... ... ... ... . .. . .. . ... ... ... .. 67
6.2.2. Oxygen and helium displays . ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. 68
6.2.3. Oxygen limit fraction (OLF%) ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. 70
6.2.4. Gas change and multiple breathing gas mixes . .. . ... ... ... ... ... ... ... . 71
6.3. Diving in the GAUGE mode .. .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... .. 72
7. AFTER DIVING ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . . 74
7.1. Surface interval ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... .. 74
7.2. Dive numbering . ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... . 75
7.3. Repetitive dive planning . . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... 76
7.4. Flying after diving . ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... .. 76
7.5. PLAN mode . ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... .. 78
7.5.1. DIVE PLANNING mode (PLAN NoDec) . ... ... ... ... ... ... ... . .. . .. . .. . .. 78
7.6. MEMORY mode . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... 80
7.6.1. Dive logbook (MEM Logbook) . ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... . 81
7.6.2. Dive history .. ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... .. 83
7.7. Suunto Dive Planner (SDP) . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... 84
7.8. Suunto DM4 with Movescount . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... 86
7.9. Movescount . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... .. 87
8. CARE AND MAINTENANCE OF MY SUUNTO DIVING COMPUTER . . .. . ... .. 88
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9. BATTERY REPLACEMENT .. ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... . 91
9.1. Battery kit . . .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... . 91
9.2. Required tools .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... . 91
9.3. Replacing the battery .. . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... 92
9.4. Wireless transmitter battery replacement . ... . .. . .. . ... ... ... ... ... ... ... . .. . .. 95
9.4.1. Transmitter battery kit . ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... . 95
9.4.2. Required tools . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . 96
9.4.3. Replacing the transmitter battery ... ... ... ... ... ... . .. . .. . ... ... ... ... ... .. 96
10. TECHNICAL DATA . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . . 98
10.1. Technical specifications . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... 98
10.2. RGBM . ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... 102
10.2.1. Suunto Technical RGBM decompression model ... ... . .. . .. . ... ... .. 102
10.2.2. Diver safety and Suunto Technical RGBM model . .. . .. . ... ... ... ... . 104
10.2.3. Altitude diving ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... .. 105
10.3. Oxygen exposure ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... .. 105
11. INTELLECTUAL PROPERTY . ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . ... 107
11.1. Trademark . ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... . 107
11.2. Copyright . ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. 107
11.3. Patent notice . ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . 107
12. DISCLAIMERS . . ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... 108
12.1. CE . ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... . 108
12.2. EN 13319 ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... 108
12.3. EN 250 / FIOH . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. 108
13. SUUNTO LIMITED WARRANTY . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . ... ... ... .. 109
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14. DISPOSAL OF THE DEVICE . ... ... ... ... ... . .. . .. . .. . ... ... ... ... ... ... ... . .. . .. . 111
GLOSSARY ... ... ... . .. . .. . ... ... ... ... ... ... ... ... . .. . .. . ... ... ... ... ... ... ... . .. . .. . .. . 112
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1. WELCOME TO THE WORLD OF SUUNTO DIVE COMPUTERS
Suunto HelO2 wristop dive computer is designed to help you get the most out of your
diving.
With easy-to-use PC dive planner and gas switching, Suunto HelO2 simplifies your
diving experience because all the information you need relating to depth, time, tank
pressure, and decompression status is available on one easy-to-read screen.
The Suunto HelO2 User's Guide contains vitally important information which enables
you to become familiar with your Suunto wristop dive computer. To understand the
use, displays, and limitations of the instrument before using it, please read this user's
guide carefully, and save it for further reference. Note also that a glossary is included
at the back of the user's guide to help you understand dive-specific terminology.
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1.1. Using HelO2 with Dive Manager and Dive Planner
Suunto HelO2 is designed to be used together with Suunto Dive Planner and Suunto
Dive Manager. They both are PC programs for planning and managing your dive data.
While HelO2 is used during a dive, the Dive Manager is used for uploading the dive
data to your PC and the Dive Planner for planning any subsequent dives using the
uploaded dive data as a basis.
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2. WARNINGS, CAUTIONS, AND NOTES
Throughout this user's guide, important safety icons are displayed. Three classifications
are used to separate these icons by their order of importance:
WARNING
is used in connection with a procedure or situation that may result
in serious injury or death
CAUTION
NOTE
Before you go on to read the user's guide itself, it is extremely important that you read
the following warnings. These warnings are intended to maximize your safety while
using Suunto HelO2 and must not be ignored.
WARNING
WARNING
10
is used in connection with a procedure or situation that will result
in damage to the device
is used to emphasize important information
YOU MUST READ the leaflet and user guide for your dive computer. Failure to do so may lead to improper use, serious injury
or death.
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 illness (DCI).
Therefore, Suunto strongly recommends that the device not be
used for any commercial or professional diving activities.
WARNING
WARNING
ONLY DIVERS TRAINED IN PROPER USE OF SCUBA DIVING
EQUIPMENT SHOULD USE A DIVE COMPUTER! No dive
computer can replace the need for proper dive training. Insufficient
or improper training may cause a diver to commit errors that may
lead to serious injury or death.
THERE IS ALWAYS A RISK OF DECOMPRESSION ILLNESS
(DCI) 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
TABLEWILL PREVENT THE POSSIBILITY OF DCI 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 DCI. As an
added measure of safety, you should consult a physician regarding
your fitness before diving.
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WARNING
SUUNTO STRONGLY RECOMMENDS THAT SPORT DIVERS
LIMIT THEIR MAXIMUM DEPTH TO 40 M/130 FT OR TO THE
DEPTH CALCULATED BY THE COMPUTER BASED ON THE
SELECTED O2% AND A MAXIMUM PO2OF 1.4 BAR! Exposure
to greater depths increases the risk of oxygen toxicity and decompression illness.
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WARNING
WARNING
WARNING
DIVES WITH REQUIRED DECOMPRESSION STOPS ARE NOT
RECOMMENDED. YOU SHOULD ASCEND AND BEGIN DECOMPRESSION IMMEDIATELY WHEN THE DIVE COMPUTER
SHOWS YOU THAT A DECOMPRESSION STOP IS REQUIRED!
Note the blinking ASC TIME symbol and the upward pointing arrow.
USE BACK-UP INSTRUMENTS! Ensure that you use back-up
instrumentation, including a depth gauge, submersible pressure
gauge, timer or watch, and have access to decompression tables
whenever diving with the dive computer.
PERFORM PRE-CHECKS! Always activate and check the device
before diving in order to ensure that all Liquid Crystal Display
(LCD) segments are completely displayed, the device has not
run out of battery power, and that the oxygen, altitude, personal,
RGBM adjustments, and Safety/Deep Stop are correct.
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 DCI. 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 illness!
WARNING
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.
DO NOT EXPOSE ANY PART OF YOUR DIVE COMPUTER TO
ANY GAS MIX CONTAINING MORE THAN 40% OXYGEN! Enriched air with greater oxygen content presents a risk of fire or
explosion and serious injury or death.
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WARNING
THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL
PERCENTAGE VALUES OF OXYGEN CONCENTRATION. DO
NOT ROUND UP FRACTIONAL PERCENTAGES! For example,
31.8% oxygen should be entered as 31%. Rounding up will cause
nitrogen percentages to be understated and will affect decompression calculations. If there is a desire to adjust the computer to
provide more conservative calculations, use the personal adjustment feature to affect decompression calculations or reduce the
PO2setting to affect oxygen exposure according to the entered
O2% and PO2values.
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WARNING
SET THE CORRECT ALTITUDE ADJUSTMENT MODE! When
diving at altitudes greater than 300 m/1000 ft, the Altitude Adjustment feature 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 Adjustment setting or diving above
the maximum altitude limit will result in erroneous dive and planning data.
WARNING
SET THE CORRECT PERSONAL ADJUSTMENT MODE!
Whenever it is believed that factors that tend to increase the
possibility of DCI exist, it is recommended that you use this option
to make the calculations more conservative. Failure to select the
correct Personal Adjustment setting will result in erroneous dive
and planning data.
WARNING
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).
YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DISPLAYED BY THE INSTRUMENT! The ascent time will increase
if you:
• remain at depth
• ascend slower than 10 m/min / 33 ft/min or
• make your decompression stop deeper than at the ceiling
These factors will also increase the amount of air required to
reach the surface.
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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.
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WARNING
WARNING
WARNING
DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU
HAVE NOT PERSONALLY VERIFIED ITS CONTENTS AND
ENTERED THE ANALYSIS VALUE INTO YOUR DIVE COMPUTER! Failure to verify cylinder contents and enter the appropriate O2% into your dive computer will result in incorrect dive
planning information.
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 cylinder
contents and enter the appropriate gas values where applicable
into your dive computer will result in incorrect dive planning information.
Diving with gas mixtures exposes you to risks that are different
from those associated with diving with standard air. These risks
are not obvious, and require training to understand and avoid.
Risks include possible serious injury or death.
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 by waiting at
least three hours before diving.
WARNING
WARNING
WARNING
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 the warning is given
can rapidly increase the risk of oxygen toxicity, injury, or death
Suunto also recommends that you receive training in Free diving
techniques and physiology before conducting breath hold dives.
No dive computer can replace the need for proper dive training.
Insufficient or improper training may cause a diver to commit errors
that may lead to serious injury or death.
If there are several divers using the dive computer with wireless
transmission, always ensure that each diver is using a different
code before starting the dive.
Personal adjustment setting P0–P-2 causes a high risk of DCI,
or other personal injury, and death.
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WARNING
Using the Suunto Dive Planner software 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.
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WARNING
WARNING
NOTE
Always use realistic SAC rates and conservative turn pressures
during dive planning. Overly optimistic or erroneous gas planning
can result in the exhaustion of breathing gas during decompression or in a cave or a wreck.
ENSURE THE WATER RESISTANCEOF THE DEVICE! Moisture
inside the device or battery compartment will seriously damage
the unit. Only an authorized SUUNTO dealer or distributor should
do service activities.
It is not possible to change between MIXED GAS, and GAUGE
modes before the instrument has counted down the no-fly time.
3. SUUNTO HELO2 USER INTERFACE
Gases
Depth Alarm
Dive Time Alarm
Personal/Altitude
Sample rate
Tank Pressure
Tank Pressure Alarm
Units
Mixed gas
Gauge
Logbook
History
MEMORY
SUB-MODES
NoDec
PLAN
SUB-MODE
3.1. Navigating in the menus
Suunto HelO2has four main operating modes:
1. TIME mode
2. DIVE mode (MIXED GAS, GAUGE)
3. PLAN mode (NODEC)
4. MEMORY mode (HISTORY, LOGBOOK)
To toggle between the main modes, press the MODE button. To select a submode in
DIVE and MEMORY modes, press the UP/DOWN buttons.
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3.2. Button symbols and functions
The table below explains the main functions of the dive computer's buttons. The buttons
and their use is explained in more detail in the relevant sections of the user's guide.
Table 3.1. Button symbols and functions
Main functionsPressButtonSymbol
ShortMODE
LongMODE
Switch between main modes
Switch from submode to main mode
Activate backlight in DIVE mode
Activate backlight in other modes
Activate stopwatch in DIVE mode
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ShortSELECT
ShortUP
Select a submode
Select and accept settings
Select stopwatch to stop or start in DIVE mode
Toggle between alternative displays
Change submode
Increase values
Main functionsPressButtonSymbol
Activate gas switching in MIXED GAS modeLongUP
ShortDOWN
LongDOWN
Toggle between alternative displays
Change submode
Decrease values
Enter Setting mode
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4. GETTING STARTED
USE UP AND DOWN BUTTONS
TO TOGGLE BETWEEN TIME, DATE
UNITS, BACKLIGHT AND TONES
To get the most out of your Suunto HelO2, use some time to personalize it and really
make it YOUR computer. Set the correct time and date, tones, unit and backlight settings.
Suunto HelO2 is a very user-friendly dive computer, and you will quickly become familiar with its functions. Make absolutely sure that you know your computer and have
it set up as you want it BEFORE getting into the water.
4.1. TIME mode settings
The first thing to do with your Suunto HelO2, is to modify the TIME mode settings: the
time, date, units, backlight, and tones.
NOTE
The figure below shows how to enter the TIME Settings menu.
The display is illuminated by holding down the MODE button for
more than 2 seconds.
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4.1.1. Setting the time
ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
In the Time setting mode, you are able to set the hour, minute, and second, as well
as choose between a 12 and 24 hour display.
4.1.2. Setting the date
In the Date setting mode, you are able to set the year, month, and day. The day of
the week is automatically calculated in accordance with the date. In metric units the
date is presented as DD/MM, and in imperial units as MM/DD.
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4.1.3. Setting the units
ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
In the Units setting mode, you are able to choose whether the units are displayed in
either the metric or imperial system (meters/feet, Celsius/Fahrenheit, and so on).
4.1.4. Setting the backlight
In the Backlight setting mode, you are able 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.
4.1.5. Setting the tones
In the Tones setting mode, you are able to activate or deactivate the tones.
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ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
NOTE
When the tones are off, there are no audible alarms.
4.2. AC water contacts
The water and data transfer contact is located on the rear of the case. When submerged, the water contact poles are connected by the conductivity of the water and
the “AC” symbol appears on the display. The AC text is shown until the water contact
deactivates.
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AC APPEARS IN THE TOP RIGHT
CORNER OF THE DISPLAY, WHEN THE DIVE
COMPUTER IS IN CONTACT WITH WATER.
Contamination or dirt on the water contact may prevent this automatic activation.
Therefore, it is important that the water contact is kept clean. The contact can be
cleaned with fresh water and a soft brush, for example a tooth brush.
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5. BEFORE DIVING
Do not attempt to use the dive computer without reading this user's guide 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 dive
computer, contact your SUUNTO dealer before diving with the dive computer.
Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY!
When used properly, Suunto HelO2 is an outstanding tool for assisting properly trained,
certified divers in planning and executing technical dives. It is NOT A SUBSTITUTE
FOR CERTIFIED SCUBA INSTRUCTION, including training in the principles of decompression and/or multi-gas diving.
WARNING
Do not attempt to dive with any gas mix other than standard air without first receiving
certified training in this specialty.
Diving with gas mixtures exposes you to risks that are different
from those associated with diving with standard air. These risks
are not obvious, and require training to understand and avoid.
Risks include possible serious injury or death.
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5.1. Planning your dives
The Suunto HelO2 is designed for computer-aided technical diving. You plan and
modify your dive profiles with Suunto Dive Planner and download the gases required
for the profile to the dive computer. During a dive, the dive computer alerts you about
the gas switches and stops, as well as monitors the dive. The dive computer records
data of the actual dive. After a dive you upload the data back to the Suunto Dive
Planner for comparing the plan to the actual dive and adjusting the plan for the next
dive.
The Suunto HelO2 can store up to eight different gas mixes of oxygen, helium or nitrogen into its memory. The minimum O2% on the dive computer is 8%.
With the Suunto Dive Planner you can:
1. plan a dive including a depth plan, decompression schedule, and gas mixes for
use during a dive.
2. simulate the dive and create backup plans for printing them on slates. The information on a slate includes the gases, depth, dive time, and ascent profile.
3. create recipes for gas mixes, either for partial pressure or continuous flow filling,
and print them out for ordering or mixing.
4. download gases, maximum PO2, alarms and settings to the dive computer, as
well as confirm and set primary and secondary gases.
5. upload data of the last dive to Suunto Dive Planner and use the data for planning
the next dive or for comparing the actual dive to the planned one.
After filling the cylinders with the required gas mixes, their oxygen and helium percentages must be analyzed and the dive computer settings modified accordingly either
with the Suunto Dive Planner or directly in the dive computer.
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When creating a dive series, the real tissue pressures are calculated by uploading the
YOU ARE ADVISED TO MAKE A
DEEPSTOP AT 18 M. THE SECOND
INDICATOR SHOWS THAT YOU HAVE 110
SECONDS LEFT OF YOUR DEEPSTOP.
actual dives to the Suunto Dive Planner with the Suunto Dive Manager. You can then
plan the next dive based on this information.
5.2. The Suunto Technical RGBM
Suunto’s Technical RGBM, utilized in the Suunto HelO2, predicts both dissolved and
free gas in the blood and tissues of divers. It is a significant advance on the classic
Haldane models, which do not predict free gas. The advantage of Suunto RGBM is
additional safety through its ability to adapt to a variety of situations and dive profiles.
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 settings and the specific dive situation.
To get the most from the RGBM safety benefits, refer to Section 10.2. RGBM.
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5.3. Emergency ascents
Before you dive, you must have the dive plan created with the Suunto Dive Planner
printed out on a slate. You must also have a back-up plan for lost gases. In the unlikely
event that the dive computer malfunctions during a dive, start using an alternative
depth gauge and timer and following the ascent schedule and gas switches that are
on the slate. If you dive using only air, follow these steps:
Assess the situation calmly and then move promptly to less than 18 m/60 ft.
1.
At 18 m/60 ft, slow down your ascent rate to 10 m/33 ft per minute and move to
2.
a depth between 3 and 6 m/10 and 20 ft.
Stay there for as long as your gas supply will safely allow. After reaching the
3.
surface, do not dive for at least 24 hours.
In the event that the dive computer functions but a required gas is not available, you
can use your diving partner's gas, which is set as a secondary gas on your dive computer. Displayed ASC TIME is not correct, but the decompressions are calculated
correctly.
In the event that a required gas is not available at all, decompress for as long as you
can by using the next most suitable gas that has the highest oxygen content. Notice
that the oxygen content should be low enough to not violate the maximum partial
pressure of oxygen (PO2).
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