I N S T R U CT I O N M A N U A L

Dive Computers

QUICK REFERENCE GUIDE
Arrows: - Decompression Stop at the Ceiling Depth - Mandatory Safety Stop Zone - Ascent Recommended - Must Descend Present Depth Dive Counter Logbook Symbol Dive Attention Symbol Bar Graph: - Mode Indicator - Consumed Botton Time - Oxygen Limit Fraction Do Not Fly Icon Oxygen Percentage in Nitrox Mode Altitude Adjustment Mode
Maximum Depth Ceiling Depth on Decompression Mandatory Safety Stop Depth Average Depth on Logbook Oxygen Partial Pressure AM/PM Indicator Safety Stop Warning Safety Stop Indicator Fast Ascent Warning (SLOW) Bar Graph: - Ascent Rate Indicator - Battery Power Indicator - Logbook Page Indicator Current Time Display Surface Interval Time No Flying Time No-Decompression Time Total Ascent Time Safety Stop Time The Smart Button: - Activation - Backlight - Mode Operations Indicators for the Smart Button Low Battery Warning
Personal Adjustment Mode Temperature Week Day Mode Text Indicators for the Scroll Buttons Dive Planning Button Scroll Button (increase value, ascend)
Dive Time Time Month,Day Daily/DiveTime/Depth Time (alternative display) Button Scroll Button (decrease value, descend) Alarm On Indicator
DEFINITION OF WARNINGS, CAUTIONS AND NOTES
Throughout this manual, special references are made when deemed important. Three classifications are used to separate these references by their order of importance. WARNING CAUTION NOTE is used in connection with a procedure or situation that may result in serious injury or death. is used in connection with a procedure or situation that will result in damage to the product. is used to emphasize important information.
COPYRIGHT, TRADEMARK AND PATENT NOTICE
This instruction manual is copyrighted and all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any media without prior written consent from SUUNTO. SUUNTO, VYPER, Consumed Bottom Time (CBT), Oxygen Limit Fraction (OLF), SUUNTO RGBM, Continuous Decompression and their logos are all registered or unregistered trademarks of SUUNTO. All rights are reserved. Patents have been issued or applied for one or several features of this product.
The CE mark is used to mark conformity with the European Union EMC directive 89/336/EEC. The SUUNTO dive instruments fulfill all the required EU directives.

PREN 13319

PrEN 13319 "Diving accessories - Depth gauges and combined depth and time measuring devices - Functional and safety requirements, test methods" is an European diving depth gauge standard draft. The VYPER is designed to comply with this standard draft.

ISO 9001

SUUNTO Oyj's Quality Assurance System is certified by Det Norske Veritas to be according to the ISO 9001 in all SUUNTO Oyj's operations (Quality Certificate No. 96-HEL-AQ-220). SUUNTO Oyj does not assume any responsibility for losses or claims by third parties, which may arise through the use of this device. Due to continuous product development the VYPER is subject to change without notice.

WARNING!

READ THIS MANUAL! Carefully read this instruction manual in its entirety, including section 1.1. "Safety Precautions". Make sure that you fully understand the use, displays and limitations of the dive computer. Any confusion resulting from improper use of this device may cause diver to commit errors that may lead to serious injury or death.
ALWAYS ACTIVATE THE COMPUTER TO CHECK THE NO-FLYING TIME REMAINING PRIOR TO FLYING. The computer goes into the stand-by display automatically 5 minutes after the dive has ended. The stand-by display shuts off after two hours. Failure to check the remaining no-flying time prior to flying can greatly increase the risk of DCS.
IN THE DATA TRANSFER MODE THE DIVE MODE IS NOT AUTOMATICALLY ACTIVATED. You must exit this mode before diving.
NOTE! IT IS NOT POSSIBLE TO CHANGE BETWEEN THE AIR, NITROX AND GAUGE MODES BEFORE THE INSTRUMENT HAS COUNTED DOWN THE NO-FLYING TIME. IF YOU DIVE WITH THE GAUGE MODE, IT IS NOT POSSIBLE TO CHANGE BETWEEN THE MODES WITHIN 48 HOURS. WHEN PLANNING SUBSEQUENT AIR AND NITROX DIVES DURING THE SAME DIVE SERIES, YOU SHOULD HAVE THE DIVE COMPUTER SET IN THE NITROX MODE AND MODIFY THE GAS MIX ACCORDINGLY.

TABLE OF CONTENTS

WARNINGS... 3 1. INTRODUCTION.. 6
1.1. SAFETY PRECAUTIONS... 6 1.1.1. Emergency Ascents... 8 1.1.2. Dive Computer Limitations.. 9 1.1.3. Enriched Air and Safety... 9
2. GETTING ACQUAINTED... 10
2.1. FUNCTIONS... 10 2.2. PUSH BUTTONS... 10 2.3. WATER CONTACTS... 12
3. DIVING WITH THE DIVE COMPUTER.. 13
3.1. BEFORE DIVING... 13 3.1.1. Activation and Prechecks... 13 3.1.2. Battery Power Indicator and Low Battery Warning.. 15 3.1.3. Dive Planning [PLAN]... 16 3.1.4. User Definable Functions and Alarms. 17 3.2. DIVING WITH AIR.. 18 3.2.1. Basic Dive Data... 18 3.2.2. Consumed Bottom Time (CBT).. 19 3.2.3. Safety Stop Displays... 20 3.2.4. Ascent Rate Indicator.. 21 3.2.5. Decompression dives.. 23 3.3. DIVING WITH ENRICHED AIR NITROX.. 27 3.3.1. Before Diving... 27 3.3.2. Oxygen Displays... 29 3.3.3. Oxygen Limit Fraction (OLF).. 30 3.4. GAUGE MODE... 31 3.5. AT THE SURFACE... 32 3.5.1. Surface Interval... 32 3.5.2. Dive Numbering... 33 3.5.3. Flying After Diving... 34 3.6. AUDIBLE AND VISUAL ALARMS... 35 3.7. HIGH ALTITUDE DIVES AND PERSONAL ADJUSTMENT 37 3.7.1. Altitude Adjustment... 37 3.7.2. Personal Adjustment... 38 3.8. ERROR CONDITIONS.. 40
4. MENU BASED MODES... 41
4.1. MEMORIES AND DATA TRANSFER [1 MEMORY]. 43 4.1.1. Logbook and Dive Profile Memory [1 LOGBOOK]. 43 4.1.2. Dive History Memory [2 HISTORY].. 46 4.1.3. Data Transfer and PC-Interface [3 TR-PC].. 46 4.2. SIMULATION MODE [2 SIMUL].. 48 4.2.1. Dive Simulator [1 SIM DIVE].. 48 4.2.2. Dive Planning Simulator [2 SIM PLAN]. 49 4.3. SET MODES [3 SET]... 50 4.3.1. Dive Parameter Settings [1 SET DIVE].. 50 4.3.1.1. Altitude Adjustment and Personal Adjustment Settings [1 AdJ MODE].. 50 4.3.1.2. Dive Time Alarm Setting [2 d ALARM]. 51 4.3.1.3. Maximum Depth Alarm Setting [3 MAX DPTH]. 52 4.3.1.4. Nitrox/Oxygen Setting [4 NITROX]. 52 4.3.2. Setting Time [2 SET TIME]... 53 4.3.2.1. Adjusting Time [1 AdJ TIME].. 53 4.3.2.2. Adjusting Date [2 AdJ DATE].. 53 4.3.2.3. Adjusting Daily Alarm Setting [3 T ALARM]. 54 4.3.3. Setting Preferences [3 SET PREF]... 54 4.3.3.1. Backlight On Time Setting [1 LIGHT].. 54 4.3.3.2. Dive Computer Model Setting [2 MODEL]. 55
5. CARE AND MAINTENANCE.. 56
5.1. IMPORTANT INFORMATION.. 56 5.2. CARE OF YOUR DIVE COMPUTER.. 57 5.3. MAINTENANCE... 58 5.4. WATER RESISTANCE INSPECTION.. 58 5.5. BATTERY REPLACEMENT... 59
6. TECHNICAL DESCRIPTION... 63
6.1. OPERATING PRINCIPLES.. 63 6.2. REDUCED GRADIENT BUBBLE MODEL, SUUNTO RGBM65 6.3. OXYGEN EXPOSURE.. 66 6.4. TECHNICAL SPECIFICATION.. 67
7. WARRANTY... 70 8. GLOSSARY... 71

1. INTRODUCTION

Congratulations on your choice of the SUUNTO VYPER advanced dive computer. This dive computer is a compact and sophisticated multipurpose dive instrument that will give you years of trouble-free and joyful diving.

Fig. 3.26 Diving with the GAUGE Mode.

3.5. AT THE SURFACE

MAX NO

3.5.1. Surface Interval

An ascent to any depth shallower than 1.2 m [4 ft] will cause the DIVING display to be replaced by the SURFACE display, giving the following information (Fig 3.27): the maximum depth in meters [ft] the present depth in meters [ft] the no-flying warning indicated by an airplane icon the Altitude Adjustment setting the Personal Adjustment setting the dive attention symbol indicates that you should prolong your surface interval time the STOP label for 5 min, if the Mandatory Safety Stop was violated Er in the center window, if the decompression ceiling was violated (= Error Mode) (Fig. 3.30) the current temperature with C for Centigrade [or F for Fahrenheit] the dive time in minutes, i.e. the total duration of the most recent dive, shown as DIVE TIME.
Fig. 3.27 Surface display. You have surfaced from a 18 minute dive, which maximum depth was 20.0 m [66 ft]. The present depth is 0.0 m [0 ft]. The airplane symbol indicates that you should not fly and the dive attention symbol indicates that you should prolong your surface interval time.
Fig 3.28 Surface interval, Surface time display. Pressing the TIME button will show the surface time display.
Or when the TIME button is pressed once or twice: the current time, shown as TIME instead of the DIVE TIME the surface time in hours and minutes (separated by a colon), telling the duration of the present surface interval (Fig. 3.28) the no-flying time in hours and minutes is shown next to the airplane in the center window of the display (Fig. 3.29).
If set to NITROX Mode, the following information will also be shown: the oxygen percentage labeled with O2% is shown on the left side of the center window the current oxygen toxicity exposure shown with an Oxygen Limit Fraction (OLF) bar graph along the left side of the display (instead of the CBT).

3.5.2. Dive Numbering

Several repetitive dives are considered to belong to the same repetitive dive series when the dive computer has not counted the no-flying time to zero. Within each series, the dives are given individual numbers. The first dive of the series will be numbered as DIVE 1, the second as DIVE 2, the third as DIVE 3, etc. If you start a new dive in less than 5 minutes at the surface, the dive computer interprets this as a continuation of the previous dive and the dives are considered to be one and the same. The diving display will return, the dive number will remain unchanged, and the dive time will begin where it left off. After 5 minutes on the surface, subsequent dives are by definition repetitive. The dive counter displayed in the Planning Mode will progress to the next higher number if another dive is made.
Fig. 3.29 Surface interval, noflying time. Pressing the TIME button twice will show the noflying time, indicated by an airplane symbol.

Fig. 3.30 Surface Mode after a violated decompression dive. The Er symbol indicates that you have violated the ceiling for more than three minutes. You must not dive again for at least 48 hours.
Dive Attention Symbol Violated Decompression Ceiling

Do Not Fly Symbol

3.5.3. Flying After Diving
The no-flying time is shown in the center window next to the airplane image. Flying or traveling to a higher altitude should be avoided at any time the computer counts down the no-flying time. NOTE! The airplane symbol is not shown on the stand-by display. You should always activate the dive computer and check that the airplane symbol is not displayed prior to flying. The no-flying time is always at least 12 hours or equivalent to the so-called desaturation time (if longer than 12 hours). In the permanent Error Mode and GAUGE Mode the no-flying time is 48 hours. Flying or traveling to a higher altitude after a dive may significantly increase the risk of decompression sickness.
YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COMPUTER COUNTS DOWN THE NO-FLYING TIME! Further, the Divers Alert Network (DAN) advises as follows: - A minimum surface interval of 12 hours would be required in order to be reasonably assured a diver will remain symptom free upon ascent to altitude in a commercial jetliner (altitude up to 2400 m [8000 ft]). - Divers who plan to make daily, multiple dives for several days, or make dives that require decompression stops, should take special precautions and wait for an extended interval beyond 12 hours before flight. Further, the Undersea and Hyperbaric Medical Society (UHMS) suggests divers using standard air tanks and exhibiting no symptoms of decompression sickness wait 24 hours after their last dive to fly in an aircraft with cabin pressure up to 2400 m [8000 ft]. The only two exceptions to this recommendation are: - If a diver had less than 2 hours total accumulated dive time in the last 48 hours, then a 12 hour surface interval before flying is recommended. - Following any dive that required a decompression stop, flying should be delayed for at least 24 hours, and if possible, for 48 hours. SUUNTO recommends that flying is avoided until all the DAN and UHMS guidelines and the dive computer wait to fly conditions are satisfied.
THERE CAN NEVER BE A FLYING AFTER DIVING RULE THAT IS GUARANTEED TO PREVENT DECOMPRESSION SICKNESS COMPLETELY!
3.6. AUDIBLE AND VISUAL ALARMS
The dive computer features audible and visual alarms to advise when important limits are approached or to acknowledge preset alarms.
A short single beep occurs, when: the dive computer is activated when the dive computer automatically returns to the TIME Mode.

3.7. HIGH ALTITUDE DIVES AND PERSONAL ADJUSTMENT
The dive computer can be adjusted for increasing the conservatism of the mathematical nitrogen model and for diving at altitude.
3.7.1. Altitude Adjustment
When programming the instrument for the correct altitude, you need to select the correct Altitude Mode according to Table 3.3. As a result, the dive computer adjusts its mathematical model according to the entered altitude mode, giving shorter no-decompression times at higher altitudes (see Section 6.1. "Operating Principles", Table 6.1. and 6.2.)
TABLE 3.3 ALTITUDE ADJUSTMENT RANGES (NEW RANGES 0 - 300m -1500m - 3000m)
Altitude mode A0 A1 A2 Symbol on display Altitude range 0 - 300 m [0 - 1000 ft] 300 - 1500 m [1000 - 5000 ft] 1500 - 3000 m [5000 - 10000 ft]
The entered Altitude Adjustment Mode is indicated by mountain symbols (A0, A1 = one mountain, or A2 = two mountains). Section 4.3.1.1. "Altitude Adjustment and Personal Adjustment Setting" describes how the Altitude Mode is adjusted.
THIS DIVE COMPUTER IS NOT INTENDED FOR USE AT ALTITUDES GREATER THAN 3000 m [10000 ft]! Diving at altitudes above this limit may significantly increase the risk of DCS. Traveling to a higher elevation can temporarily cause a change in the equilibrium of dissolved nitrogen in the body with the surroundings. It is recommended that you allow the body conditions to stabilize over a period of at least three hours before beginning to dive at altitude.
3.7.2. Personal Adjustment
Factors that may affect susceptibility to decompression sickness vary between divers and also for the same diver from one day to another. The three-step Personal Adjustment Mode is available, if a more conservative dive plan is desired. The factors which tend to increase the possibility of DCS include, but are not limited to:
cold exposure - water temperature less than 20 C [68 F] the diver is below average physical fitness level multiday or repetitive dive exposure diver fatigues diver dehydration previous history of DCS.
The Personal Adjustment Mode is indicated by a diver symbol and plus signs (P0 = a diver, P1 = diver +, or P2 = diver ++). Section 4.3.1.1. "Altitude Adjustment and Personal Adjustment Setting" describes how the Personal Mode is adjusted. This feature should be used to adjust the computer to be more conservative, according to personal preference, by entering the suitable Personal Adjustment Mode with the help of Table 3.4. In ideal conditions, retain the default setting, P0. If conditions are more difficult or other mentioned factors which tend to increase the possibility of DCS exist, select P1 or even the most conservative P2. As a result the dive computer adjusts its mathematical model according to the entered Personal Adjustment Mode, giving shorter no-decompression times (see section 6.1. "Operating Principles", Table 6.1 and 6.2).

TABLE 3.4 PERSONAL ADJUSTMENT RANGES
Personal mode P0 P1 P2 Symbol on display Condition Ideal condition Some mentioned factors or conditions exist Several mentioned factors or conditions exist Desired tables Default Progressively more conservative
SET THE CORRECT PERSONAL ADJUSTMENT MODE! You should use this option to make the calculations more conservative, whenever it is believed that factors, which tend to increase the possibility of DCS exist. Failure to properly select the Personal Adjustment Mode correctly will result in erroneous data and can greatly increase the risk of DCS.
THERE IS ALWAYS A RISK OF DECOMPRESSION SICKNESS FOR ANY DIVE PROFILE EVEN IF YOU FOLLOW THE DIVE PLAN PRESCRIBED BY DIVE TABLES OR A DIVE COMPUTER. You are advised to remain well within the exposure limits provided by the instrument to minimize the risk of DCS. Decompression sickness can cause serious injury or death.

3.8. ERROR CONDITIONS

The dive computer has warning indicators that alert the user to react to certain situations that would otherwise give rise to a significantly increased risk of DCS if left unattended. If you do not respond to its warnings, the dive computer will enter an Error Mode, indicating that the risk of DCS has greatly increased. If you understand and operate the dive computer sensibly, it is very unlikely you will ever put the instrument into the Error Mode.

OMITTED DECOMPRESSION

The Error Mode results from omitted decompression, 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 descend below the ceiling within three minutes. Once in the permanent Error Mode the dive computer will not show no-decompression or ascent times. Only a permanent Er warning is shown in the center window. However, all the other displays will function as before to provide information for ascent. You should immediately ascend to a depth of 3 to 6 m [10 to 20 ft] and remain at this depth until air supply limitations require you to surface. When the surface has been reached, no further diving should take place for a minimum of 48 hours. During the permanent Error Mode, the Er text will be displayed in the center window and the Planning Mode cannot be entered.

Fig. 4.15 Data Transfer Mode. [3 TR-PC].
The data transfer is carried out using the connector on the bottom of the unit. The following data is transferred to the PC: depth profile of the dive dive time surface interval time dive number Altitude and Personal adjustment settings oxygen percentage setting and maximum OLF (in NITROX Mode) tissue calculation data temperature at the maximum depth, beginning of the dive, and end of the dive dive entry time (year, month, day and time) additional dive information (e.g. SLOW and Mandatory Safety Stop violations, Dive Attention Mark, Bookmark, Surfaced Mark, Decompression Mark, Ceiling Error Mark) identity number of the dive computer personal information.
It is also possible to manually add comments and other personal information to the PC based dive data files. The PC-Interface package comes complete with the interface unit, the software, and an instruction and getting started guide. To enter the Data Transfer select MODE- 1 MEMORY- 3 TR - PC (Fig. 4.15). NOTE! While in the Data Transfer Mode, the connector/water contacts are used only for the data transfer. The Dive Mode IS NOT automatically activated if the contacts are submerged. After you have finished the data transfer, press the SMART (Quit) to exit Data Transfer Mode [TR-PC]. If no button is operated or no data is transferred within 5 minutes, the instrument beeps and returns to the timekeeping display automatically.
4.2. SIMULATION MODE [2 SIMUL]
The Simulation Mode can be used to get acquainted with the features and displays of the instrument before diving, to plan dives in advance, demonstrational or educational purposes, or just for pleasure. The dive computer has two simulation modes (Fig. 4.16): The DIVE SIMULATOR (Fig. 4.17) and The DIVE PLANNING SIMULATOR (Fig. 4.19).
Fig. 4.16 Dive Simulation Options. [2 SIMUL].
In Simulation Mode, time moves four times faster than real time (when diving), i.e., 15s = 1min.
4.2.1. Dive Simulator [1 SIM DIVE]
The Dive Simulator is an excellent tool for becoming familiar with the dive computer and planning your dives. The Dive Simulator will allow you to "perform" dive profiles of your choice and see what the display would look like during an actual dive. This includes basic dive information, as well as audible and visual warnings. To enter the Dive Simulator Mode select MODE2 SIMUL- 1 SIM DIVE (Fig. 4.17 and 4.18).

Fig. 4.17 Dive Simulator Mode. [1 SIMDIVE].
Fig. 4.18 Selected Dive Simulator Mode. Descent by pressing the arrow down (TIME) button and ascent by pressing the arrow up (PLAN) button.
4.2.2. Dive Planning Simulator [2 SIM PLAN]
The Dive Planning Simulator Mode shows you the present no-decompression limits. In this mode, you are able to add the desired surface interval increment to present surface interval time, which allows you to plan your dives in advance. This mode is also used to add the desired surface intervals for dive simulations. Add the desired surface interval increment to present surface interval by pressing the arrow down (TIME) and arrow up (PLAN) buttons. NOTE! This display is only shown for repetitive dives. To enter the Dive Planning Simulator Mode select MODE- 2 SIMUL- 2 SIM PLAN (Fig. 4.19).

OK SELECT

Fig. 4.19 Dive Planning Simulator Mode. [2 SIMPLAN].
Fig. 4.20 Selected Dive Planning Simulator Mode. Add the desired surface interval increment (to present shown surface interval) by pressing the TIME and PLAN buttons. NOTE! This display is only shown for repetitive dives.
Fig. 4.21 Dive Planning Simulation.

4.3. SET MODES [3 SET]

The Set Modes (Fig. 4.22) are divided into three submodes for setting the dive-related parameters, time related parameters and your personal preferences.
4.3.1. Dive Parameter Settings [1 SET DIVE]
To enter the Dive Parameter Setting Mode select MODE- 3 SET- 1 SET DIVE (Fig. 4.23). The Dive Parameter Setting mode has two to four options depending on the dive computer mode. In GAUGE Mode there are two options, in AIR Mode three options and in NITROX Mode four options.
Fig. 4.22 Setting Options. [3 SET].
4.3.1.1. Altitude Adjustment and Personal Adjustment Settings [1 AdJ MODE]
The current Altitude and Personal Adjustment Modes are shown when diving and at the surface. If the mode does not match the altitude or personal conditions (see section 3.7. "High Altitude Dives and Personal Adjustment"), it is imperative that you enter the correct selection before diving. Use the Altitude Adjustment to select the correct altitude mode. Use the Personal Adjustment to add an extra level of conservatism. NOTE! New altitude and personal adjustment selections cannot be made until 5 minutes after the dive.
Fig. 4.23 Dive Parameter Setting Mode. [1 SET DIVE].
Fig. 4.24 Altitude Adjustment and Personal Adjustment Setting Mode. [1 AdJ MODE].
To enter the Altitude Adjustment and Personal Adjustment Setting Mode select MODE- 3 SET1 SET DIVE- 1 AdJ MODE (Fig. 4.24). Now you are able to select from the three altitude modes (Fig. 4.25) and the three personal modes (Fig. 4.26).
ALWAYS RECHECK THE ALTITUDE AND PERSONAL ADJUSTMENT TO ENSURE THAT THE ALTITUDE IS NOT SET FOR AN ALTITUDE LESS THAN THAT OF THE DIVE SITE AND THAT THE PERSONAL MODE CORRESPONDS TO THE DESIRED CONSERVATISM. Failure to enter this information could result in dive planning errors and risk exposure to decompression sickness.

Fig. 4.25 Adjusting The Altitude Setting. Press the scroll buttons to change the altitude mode.
4.3.1.2. Dive Time Alarm Setting [2 d ALARM]
The instrument has one Dive Time Alarm Setting, which can be used for several purposes to add your diving safety. The alarm can be set, for example, to your planned bottom time. To enter the Dive Time Alarm Setting Mode select MODE- 3 SET- 1 SET DIVE- 2 d ALARM (Fig. 4.27). The Dive Time alarm can be set on or off and the time from 1 to 999 minutes.
Fig. 4.26 Adjusting The Personal Setting. Press the scroll buttons to change the personal mode.
Fig. 4.28 Setting The Dive Time Alarm. Press the scroll buttons to change the alarm on/off and to set the dive time value.
Fig. 4.27 Dive Time Alarm Setting Mode. [2 d ALARM].
4.3.1.3. Maximum Depth Alarm Setting [3 MAX DPTH]
You can set one depth alarm in the dive computer.
To enter the Maximum Depth Alarm Setting select MODE- 3 SET- 1 SET DIVE- 3 MAX DPTH (Fig. 4.29). The depth alarm is set to 40 m [131 ft] at the factory, but you are able to adjust it according your personal preference or switch it off. The depth range can be set from 3.0 m to 100 m [9 ft to 328 ft] (Fig. 4.30).
Fig. 4.29 Maximum Depth Alarm Setting Mode. [3 MAX DEPTH].
4.3.1.4. Nitrox/Oxygen Setting [4 NITROX]
If set to the NITROX Mode, the correct oxygen percentage of the gas in your cylinder must always be entered into the computer to ensure correct nitrogen and oxygen calculations. In this mode also the oxygen partial pressure limit can be set. The dive computer calculates the equivalent allowed maximum depth based on the set parameters. To enter the Nitrox/Oxygen Setting Mode select MODE- 3 SET- 1 SET DIVE- 4 NITROX (Fig. 4.31). The default oxygen percentage (O2%) setting is 21% (air) and oxygen partial setting 1.4 bar (PO2) (Fig. 4.32).
Fig. 4.30 Setting The Maximum Depth Alarm. Press the scroll buttons to change the alarm on/off and to set the maximum depth value.
Fig. 4.31 Nitrox/Oxygen Setting Mode. [4 NITROX].
Fig. 4.32 Setting Oxygen Percentage and Partial Pressure. The equivalent maximum depth is 32.8 m [107 ft]. Press the scroll buttons to change the oxygen percentage and to set the oxygen partial setting value.
4.3.2. Setting Time [2 SET TIME]

BATTERY REPLACEMENT

The battery and the buzzer are located in the back of the instrument in a separate compartment, the parts of which are shown in Fig. 5.1. To change the battery, follow the procedure below: 1. Remove the computer from the console or boot.
Wrist model: Pull off the boot. Remove it first from the front end with the longer part of the strap. Disassemble the shorter part of the strap with a flat 1.5 mm screw driver or a special tool for spring bars. The longer part of the strap may stay on but removing it may ease the work later on. Console model: Remove the dive computer from the console according the instructions of the console.
Thoroughly rinse and dry the computer. Open the securing ring of the battery compartment lid by pushing it down and rotating it clockwise. You may use a pointed nose pliers or a small screwdriver as an aid in the rotating. Put the pliers ends into the holes of the securing ring or the screwdriver onto the side of the right tooth on the ring (Fig. 5.2) and turn the ring clockwise. Care should be taken not to damage any of the parts. Remove the ring. Carefully remove the lid with the beeper attached to it. The lid can be removed by pressing with your finger on the outermost edge of the lid while at the same time pulling with your nail at the opposite side. Do not use sharp metal objects as they might damage the O-ring or the sealing surfaces. Remove the O-ring and the battery retainer. Carefully remove the battery. Do not damage the electrical contacts or the sealing surface.
Check for any traces of flooding, particularly between the beeper and the lid, or for any other damage. In case of a leak or any other damage, bring the dive computer to an authorized SUUNTO dealer or distributor for check and repair. 8. Check the condition of the O-ring; a defective O-ring may indicate sealing or other problems. Dispose the old O-ring, even if it seems to be in good condition.
Check that the battery compartment, battery holder and lid are clean. Clean with soft cloth if necessary.
10. Gently insert the new battery in the battery compartment. Check the polarity of the battery: the "-" mark should point toward the bottom of the compartment and the "+" mark upwards. 11. Reinstall the battery retainer in its correct position. 12. 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. 13. 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 edge. 14. Put your other thumb through the locking ring. Press this thumb firmly against the lid and release the other one. Make sure that the lid is pressed completely down! 15. Turn the locking ring counterclockwise with your free thumb and fingers until it snaps into its locked position. 16. The dive computer should now active it's timekeeping mode and show time 18:00 [6:00 PM] and date SA 01,01. Activate the instrument. Check that:

SURFACE INTERVALS

The dive computer requires a minimum surface interval of 5 minutes between dives. If a surface interval is shorter than 5 minutes, the instrument dive counter and dive timer treat the next dive as a continuation of the previous dive. It adds the dive times, and calculates no-decompression limits or decompression stops based on excess nitrogen absorbed on both dives.
6.2. REDUCED GRADIENT BUBBLE MODEL, SUUNTO RGBM
The Reduced Gradient Bubble Model (RGBM) is a modern algorithm for tracking both dissolved and free gas in the tissues of divers performing a wide variety of maneuvers. Unlike the classical Haldane models, the RGBM can address a number of circumstances outside the range of just dissolved gas models by: monitoring continuous multiday diving tracking closely spaced repetitive diving accounting for diving deeper than previous dive regulating rapid ascents with high degrees of Doppler bubble formation incorporating consistency with real physical laws for gas kinetics taking a modern approach to a difficult problem.
The SUUNTO RGBM algorithm is developed in co-operation with SUUNTO and Bruce R. Wienke. It is based both on laboratory experiments and diving data (for example DAN's dive data).

6.3. 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. These include for example: the displayed oxygen exposure calculations are rounded to the next higher whole percentage value for recreational scuba diving, the recommended upper limit of 1.4 bar PO2 is used as a default the CNS% limits up to 1.4 bar are based on 1991 NOAA Diving Manual limits, but the limits higher than 1.4 bar are significantly shortened. Thus, if through carelessness or emergency you exceed the 1.4 bar PO2 limit, the dive computer will still continue to calculate and show OLF% information the uptake and recovery for both CNS% and OTU% are monitored the OTU monitoring is based on the long-term daily tolerance level and the recovery rate is reduced the half time limit for the CNS recovery is 75 minutes the maximum depth warning limit based on 1.4 bar PO2 is calculated and displayed. If extra conservatism for the depth limits is required the PO2 can be adjusted to 1.2 or 1.3 bar.

Battery One 3 V lithium battery; CR 2450 (K5597) and O-ring 1,78 mm x 31,47 mm 70 ShA (K5664) Battery storage time (shelf life): Up to three years Replacement: Every two years or more often depending on dive activity Life expectancy at 20C [68F]: - 0 dives/y - 100 dives/y - 400 dives/y -> 3 years -> 2 years -> 1 year
The following conditions have an affect on the expected battery lifetime: - The length of the dives. - The condition in which the unit is operated and stored (e.g. temperature/cold conditions). Below 10C [50F] the expected battery lifetime is about 50-75% of that at 20C [68F]. - The use of the backlight and audible alarms. - The quality of the battery (some lithium batteries may exhaust unexpectedly, which cannot be tested in advance). - The time the dive computer has been stored until it gets to the customer. The battery is installed into the unit at the factory. NOTE! Low temperature or an internal oxidation of the battery may cause the battery warning even though the battery has enough capacity. In this case, the warning usually disappears when the Dive Mode is activated again.

7. WARRANTY

NOTE! The warranty arrangements are different in different countries. The dive computer packaging contains information regarding the warranty benefits and requirements applicable to your purchase. This SUUNTO dive computer is warranted against defects in workmanship and materials for a period of two years after purchase to the original owner subject to and in accordance with the terms and conditions set forth below: The dive computer should be serviced or repaired only by an authorized SUUNTO dealer or distributor. This warranty does not cover damage to the product resulting from improper usage, improper maintenance, neglect of care, alteration or unauthorized repair. This warranty will automatically become void if proper preventive maintenance procedures have not been followed as outlined in the use and care instructions for this product. If a claim under this or any other warranty appears to be necessary, return the product, freight prepaid, to your SUUNTO dealer or distributor or qualified repair facility. Include your name and address, proof of purchase and/or service registration card, as required in your country. The claim will be honored and the product repaired or replaced at no charge and returned in what your SUUNTO dealer or distributor determines a reasonable amount of time, provided all necessary parts are in stock. All repairs made, not covered under the terms of this warranty, will be made at the owner's expense. This warranty is non-transferable from the original owner. All implied warranties, including but not limited to the implied warranties of merchantability and fitness for a particular purpose, are limited from date of purchase and in scope to the warranties expressed herein. SUUNTO shall not be liable for loss of use of the product or other incidental or consequential costs, expenses or damage incurred by the purchase. All warranties not stated herein are expressly disclaimed. Some states do not allow the exclusion or limitation of implied warranties of consequential damages, so the above exclusions or limitations may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state. This warranty does not cover any representation or warranty made by dealers or representatives beyond the provisions of this warranty. No dealer or representation is authorized to make any modifications to this warranty or to make any additional warranty. Battery replacement is not covered by this warranty. This Instruction Manual should be kept with your dive computer.

Whole-Body Toxicity

TIME-KEEPING AND STAND-BY MODE LCD & battery check nitrox / gauge display

SURFACE MODE

DIVE MODE 1.2 M Backligh (>2 s)

DIVING MODE

MODES AND OPERATIONS

Backlight

Activate the timekeeping display
Plan Time & Alternative Display(s) 3 MODE OPTIONS
Bookmark in the profile memory
Time & Alternative Display(s) MENU BASED MAIN MODE

1 MEMORY

2 SIMUL

3 SET OPTIONS

2 SIMULation OPTIONS
3 MEMORY OPTIONS MENU BASED SUBMODE 1

3 SET PREFerences

1 SET DIVE

2 SIMPLAN

1 SIMDIVE

3 TR - PC

1 LOGBOOK

2 SET TIME

Add surface interval hours
Add surface interval minutes
dive simulation: surface mode

2 HISTORY

data transfer

history

Dive n page 1 page 4 profile

Dive n page 1 END

SIMulate PLANning

increase depth

decrease depth

simulate diving

ascend descend

page 2 page 3

QUIT QUIT
Dive n-1 page 1 Dive n-2 page 1

1 / 2 SET PREF OPTIONS

3 SET TIME OPTIONS 4 NITROX
3 / 4 SET DIVE OPTIONS 1 Adj MODE

QUIT SELECT

MENU BASED SUBMODE 2

2 MODEL

1 LIGHT

3 T ALARM

1 Adj TIME

2 Adj DATE

on / off hours minutes

AIR NITROX GAUGE

backlight on time

24h / AM / PM hours min

O2% PO2

Altitude A0, A1, A2

3 MAX DPTH

2 d ALARM

Personal P0, P1, P2

month day

on / off

alarm depth

DT minutes
Juvan teollisuuskatu 8 FIN-02920 Espoo, Finland Tel. +Fax +www.suunto.com

WARNING

DIVES THAT REQUIRE 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! Make sure 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, that the device has not run out of battery power, and that the oxygen, altitude, personal, Safety/Deep Stop, and RGBM adjustments are correct. 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) in Section 7.4. Flying after diving. 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 THE SUUNTO Vyper 'S OPTIONAL PRESSURE TRANSMITTER 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. DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR 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 O2% into your dive computer will result in incorrect dive planning information. 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 you want to adjust the computer to provide more conservative calculations, use the personal adjustment feature to affect decompression calculations, or reduce the PO2 setting to affect oxygen exposure. 7

SELECT THE CORRECT ALTITUDE 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 calculate 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 correct Altitude Adjustment setting, or diving above the maximum altitude limit will result in erroneous dive and planning data. SELECT THE CORRECT PERSONAL ADJUSTMENT SETTING! 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. This device contains a Lithium cell battery. To reduce the risk of fire or burns, do not disassemble, crush, puncture, short external contacts, or dispose of in fire or water. Replace only with manufacturer-specified batteries. Recycle or dispose of used batteries properly. It is not possible to change between AIR, NITROX and GAUGE modes before the instrument has counted down the no-fly time. There are, however, exceptions to this: You can change from AIR to NITROX mode, as well as from AIR or NITROX mode to GAUGE mode even during the no-fly time. When planning both air and nitrox dives during the same dive series, you should set the instrument in NITROX mode and modify the gas mix accordingly. In GAUGE mode the no-fly time is always 48 hours.

3. SUUNTO AT A GLANCE

3.1. Navigating in the menus AIR Suunto Vyper has four main operating modes - TIME mode (TIME), DIVE mode (DIVE), PLAN mode (PLAN), and MEMORY mode (MEMORY) as well as the COMPASS submode, which can be activated from either TIME or DIVE modes. To toggle between the main modes, press the MODE button. To select a submode in DIVE, PLAN and MEMORY modes, press the UP/DOWN buttons.
3.2. Button symbols and functions The table below explains the main functions of the dive computer's buttons. The buttons and their use are explained in more detail in the relevant sections of the manual. Table 3.1. Button symbols and functions Symbol Button Press Main functions MODE Short Switch between main modes Switch from submode to main mode Activate backlight in DIVE mode Activate backlight in other modes

SELECT Short

Select a submode Select and accept settings Activate compass in TIME and DIVE modes

SELECT Long

Toggle between alternative displays Change submode Increase values 9

Symbol

Button UP

Press Long

Main functions Enable gas switching in NITROX mode
Toggle between alternative displays Change submode Decrease values Enter Setting mode

In order to save battery energy, the transmitter shuts off if the pressure remains unchanged for more than 5 minutes, and it will continue transmitting with the saved code when any pressure change is measured.
5.7.3. Transmitting data AIR After the pairing procedure, the Suunto Vyper will receive cylinder pressure data from the transmitter. The pressure is displayed in either bars or psi, depending on the unit AIR selected. Any time the Suunto Vyper receives an appropriate signal it flashes the wireless transmitter indicator in the displays lower left corner. Table 5.4. Pressure transmission related displays Display Indication Cd:---FAIL Set Code. No code stored, Suunto Vyper transmitter. Pressure reading over 360 bar/5220 psi. Pressure reading has not been updated for more than one minute. The latest valid pressure reading is displayed intermittently. After five minutes, "FAIL" is displayed intermittently with "---". Transmitter is out of range, in power saving mode or on another channel. Activate the transmitter by breathing off the regulator, and recode the wrist unit if necessary. Pressure transmitter battery voltage is low. The pressure reading is displayed intermittently. Change the transmitter battery! Pairing has not been conducted between the dive computer and the transmitter before start of dive. No cylinder data available.
Figure ready for pairing with A B C

LOB OFF

5.8. DIVE mode settings AIR Suunto Vyper 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 (AIR, NITROX, GAUGE), so that, for example, nitrox settings are only available in the NITROX submode. The following figure shows how to enter the DIVE mode settings menu.
USE UP AND DOWN BUTTONS TO TOGGLE BETWEEN DIVE SETTINGS
Some settings cannot be changed until 5 minutes has elapsed after the dive.
5.8.1. Setting the depth alarm You can set a depth alarm in the dive computer.
The depth alarm is factory-set to 30 m/100 ft, but you can adjust it according to your personal preference, or switch it off altogether. The depth range can be set from 3 m to 100 m/9 ft to 328 ft. 5.8.2. Setting the dive-time alarm AIR The Suunto Vyper has a dive-time alarm setting which, when activated, can be used for several purposes to add to your diving safety.

5.8.9. Setting the tank pressure alarm The tank pressure alarm can be set "ON" or "OFF" and in the range of 10 - 200 bar. The alarm is the secondary cylinder pressure alarm point. The alarm is activated when the tank pressure drops below the set limit. The 50 bar alarm, however, is fixed and cannot be changed.
5.8.10. Setting the tank pressure The wireless transmission can be set ON or OFF depending whether the optional wireless pressure transmitter is used or not. No cylinder pressure-related data is shown, nor data reception made, when this selection is OFF.
5.8.11. Setting the HP code The HP Code setting allows you to verify the selected code and to erase the stored code. It also enables re-pairing if necessary.

SELECT TANK PRESSURE ON.

5.9. Activation and pre-checks This section describes how to activate the DIVE mode and explains the pre-checks that it is highly recommended you perform before you get into the water. 5.9.1. Accessing DIVE mode AIR The Suunto Vyper has three diving modes: AIR mode for diving with standard air only, NITROX mode for diving with oxygen enriched mixtures, and GAUGE mode for use as a bottom timer and for freediving. The OFF mode disables the DIVE mode, and allows the TIME mode to be used underwater. The chosen dive mode is displayed when the DIVE mode is accessed, and you can toggle between the submodes by pressing the UP/DOWN buttons.
5.9.2. DIVE mode activation The dive computer activates automatically when submerged deeper than 0.5 m/1.5 ft. However, it is necessary to activate the DIVE mode BEFORE diving to check the altitude and personal adjustment settings, battery condition, oxygen settings etc. After activation, all graphical display elements are turned on, and the backlight and the beep are activated. After this, the selected altitude and personal settings are displayed, as well as the RGBM and Deep Stop status. A few seconds later the battery power indicator is shown.
At this time, perform your pre-checks, making sure that: the instrument operates in the correct mode and provides a complete display (AIR/NITROX/GAUGE mode) the battery level is ok the altitude, personal adjustment, Safety/Deep stops, and RGBM 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 attached and the cylinder valve is open the transmitter and the wrist unit have been properly paired on a suitable code 24
the pressure transmitter is working (wireless transmitter indicator blinks, cylinder pressure is displayed), and that there is no low battery warning displayed you have enough air for your planned dive.You should also check the pressure reading against your back-up pressure gauge And, if set to NITROX mode, make sure that: the correct number of mixes is set and that the oxygen percentages are adjusted according to the measured nitrox blends in your cylinders the correct oxygen percentages are adjusted according to the measured oxygen percentages in your cylinders the oxygen partial pressure limits are set correctly For more information on the NITROX mode, refer to Section 6.2. Diving in NITROX mode (DIVEnitrox). The dive computer is now ready for diving. 5.9.3. Battery power indication Temperature or internal oxidation of the battery affect the battery voltage. If the instrument is stored for a long period, or used in cold temperatures, the low battery warning may be displayed even though the battery has enough capacity. In these cases, re-enter DIVE mode to receive the battery power indication. After the battery check, the Low Battery Warning is indicated by the battery symbol.

Desired tables

Default
Some risk factors or conditions exist Progressively more conservative Several risk factors or conditions exist
The Suunto Vyper also allows experienced divers who are willing to accept a greater level of risk to adjust the RGBM model. The default setting is 100%, which gives full RGBM effect. Suunto strongly advises you to use full RGBM effect. Statistically, very experienced divers have less incidents with DCI. The reason for this is unknown, but it is possible that some level of physiological and/or psychological accommodation can take place when you are very experienced as a diver. Thus, for certain divers and diving conditions, it may be desirable to set attenuated (50%) RGBM mode. See Table 5.7, RGBM model settings. 26
Table 5.7. RGBM model settings RGBM setting Desired Tables 100% 50%

Effect

Standard Suunto RGBM model Full RGBM effects (Default) Attenuated RGBM model Smaller RGBM effects, higher risk!
5.10. Safety Stops Safety Stops are widely considered good diving practice for recreational diving, and are an integral part of most dive tables. The reasons for performing a Safety Stop include: reducing sub-clinical DCI, microbubble reduction, ascent control, and orientation before surfacing. AIR The Suunto Vyper displays two different types of Safety Stops: Recommended Safety Stop and Mandatory Safety Stop. 5.10.1. Recommended Safety Stops With every dive over 10 meters, there is a three minute countdown for the Recommended Safety Stop, to be taken in the 6 - 3 m/10 ft - 20 ft range. This is shown with the STOP sign and a three-minute countdown in the center window instead of the no-decompression time.
WHEN STOP IS DISPLAYED, MAKE A RECOMMENDED SAFETY STOP FOR 3 MINUTES.
The Recommended Safety Stop, as the name implies, is recommended. If it is ignored, there is no penalty applied to the following surface intervals and dives.
5.10.2. Mandatory Safety Stops When the ascent rate exceeds 10 m/33 ft per minute continuously for more than 5 seconds, the microbubble build-up is predicted to be more than is allowed for in the decompression model. The Suunto RGBM calculation model responds to this by adding a Mandatory Safety Stop to the dive. The time of this Mandatory Safety Stop depends on the severity of the ascent rate excess. The STOP sign appears in the display and when you reach the depth zone between 6 m and 3 m/20 ft and 10 ft, the CEILING label, ceiling depth, and the calculated Safety Stop time also appear in the display. You should wait until the Mandatory Safety Stop warning disappears.The total length of the Mandatory Safety Stop time depends on the seriousness of the ascent rate violation.
WHEN CEILING AND STOP ARE DISPLAYED, MAKE A ONE MINUTE MANDATORY SAFETY STOP IN THE DEPTH ZONE BETWEEN 6 M AND 3 M.
You 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.You should immediately descend to, or below, the Mandatory Safety Stop ceiling depth. If you correct this situation at any time during the dive, there are no effects on the decompression calculations for future dives.

WHEN CEILING AND STOP ARE DISPLAYED, IMMEDIATELY (WITHIN 3 MINUTES) DESCEND TO OR BELOW CEILING.
If you continue to violate the Mandatory Safety Stop, the tissue calculation model is affected and the dive computer shortens the available no-decompression time for your next dive. In this situation, it is recommended that you prolong your surface interval time before your next dive. 5.11. Deep stops Deep Stops are safety stops that occur deeper than traditional stops, with the purpose of minimizing microbubble formation and excitation. The Suunto RGBM model calculates deep stops iteratively, placing the first stop about halfway between the maximum depth and the ceiling depth. After the first Deep Stop is completed, another Deep Stop will be prompted halfway to the ceiling, and so on until the ceiling depth is reached. The Deep Stop length can be set to 1 or 2 minutes.

6. DIVING

This section contains instructions on how to operate the dive computer and interpret its displays. Youll 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 in AIR mode (DIVEair) In this section, we look at how to make the most of the dive computer when diving with standard air. To activate DIVEair mode, please see Section 5.9.1. Accessing DIVE mode.
DIVE HAS JUST BEGUN AN D AVAILABLE NO-DE COMPRESSION TIME IS OVER 99 MINUTES SO NO VALUE IS DISP LAYED.
The dive computer will remain in the Surface mode at depths less than 1.2 m/4 ft. At depths greater than 1.2 m/4 ft the instrument will go into the DIVE mode automatically. However, it is recommended that you activate the Surface mode manually before entering the water in order to perform the necessary dive pre-checks.
6.1.1. Basic dive data During a No-decompression dive, the following information is displayed: your present depth in meters/feet the available no-decompression time in minutes as NO DEC TIME the ascent rate presented as a bar graph on the right side the Diver Attention Symbol if surface interval should be prolonged (see Table 7.1, Alarms) the Deep Stop depth, if activated

UPWARD POINTING ARROW HAS DISAPPEARED AND ASC TIME LABEL HAS STOPPED BLINKING, MEANING YOU ARE IN THE DECOMPRESSION RANGE.
Decompression will now begin, but is very slow.You should therefore continue your ascent. Display at the ceiling zone When you reach the ceiling zone, the display will show you two arrows pointing at each other (the hour glass icon). Below is an example of a decompression dive at the ceiling zone.
TWO ARROWS POINT AT EACH OTHER HOUR GLASS YOU ARE IN THE OPTIMUM CEILING. ZONE AT 3 M. AND YOUR MINIMUM ASCENT TIME IS 15 MINUTES.
During the decompression stop, ASC TIME will count down towards zero. When the ceiling moves upwards, you can ascend to the new ceiling. You may surface only after the ASC TIME and CEILING labels have disappeared, which means that the decompression stop and any Mandatory Safety Stop have been completed. You are advised, however, to stay until the STOP sign has also disappeared. This indicates that the three minute Recommended Safety Stop has also been completed. Display above the ceiling If you ascend above the ceiling during a decompression stop, a downward pointing arrow will appear and a continuous beeping starts.
DECOMPRESSION DIVE, ABOVE CEILING. NOTE DOWNWARD POINTING ARROW, ER WARNING AND ALARM. YOU SHOULD IMMEDIATLY (WITHIN 3 MINUTES) DES CEND TO OR BELOW CEILING.
In addition, an Error warning (Er) reminds you that you have only three minutes to correct the situation. You must immediately descend to, or below, the ceiling. 33
If you continue to violate the decompression, the dive computer will go into a permanent Error Mode. In this mode, the instrument can only be used as a depth gauge and timer. You must not dive again for at least 48 hours. (See Section 5.6. Error conditions). 6.2. Diving in NITROX mode (DIVEnitrox) NITROX mode (DIVEnitrox) is the second dive mode available in Suunto Vyper is used when using oxygen-enriched gas mixtures.
6.2.1. Before diving in NITROX mode If set to the NITROX mode, the correct oxygen percentage of the gas in your cylinder must always be entered into the computer to ensure correct nitrogen and oxygen calculations. The dive computer adjusts its mathematical nitrogen and oxygen calculation models accordingly. 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 you want to adjust the computer to provide more conservative calculations, use the personal adjustment feature to affect decompression calculations, or reduce the PO2 setting to affect oxygen exposure according to the entered O2% and PO2 values. Calculations based on nitrox use result in longer no-decompression times and shallower maximum depths than diving with air. As a safety precaution, the oxygen calculations in the computer are made with an oxygen percentage of 1% + set O2%. When the dive computer is set in NITROX mode, the Dive Planning mode calculates using the O2% and PO2 values that are currently in the computer. To set the nitrox mixes, refer to Section 5.8.3. Setting the nitrox values. Default nitrox settings AIR In NITROX mode, the Suunto Vyper allows you to set 1 or 2 nitrox mixes containing 21-99% oxygen. In the NITROX mode, the default setting for MIX1 is standard air (21% O2). It remains in this setting until the O2% is adjusted to any other percentage of oxygen (22% - 99%). The default setting for maximum oxygen partial pressure is 1.4 bar, however you are able to set it in the range of 0.5 - 1.6 bar. MIX2 is set to OFF by default. To set MIX2 , refer to Section 6.2.4. Gas change and multiple breathing gas mixes. Oxygen percentages and maximum oxygen partial pressures for MIX2 are stored permanently. 6.2.2. Oxygen displays When NITROX mode is activated, the display will show the information in the figure below. In NITROX mode, the maximum operational depth is calculated based on set O2% and PO2 values.

To learn more about SuuntoSports.coms functions and activities, visit the site, try them and, if necessary, use the site Help. The Help is available on the right side of the bar that divides the screen.
8. CARE AND MAINTENANCE OF MY SUUNTO 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. WATER CONTACTS AND PUSH BUTTONS Contamination or dirt on the water contacts/connector or push buttons may prevent the automatic activation of the Dive Mode and cause problems during the data transfer. Therefore, it is important that the water contacts and push buttons are kept clean. If the water contacts are active (AC text remains on display) or the Dive Mode activates on its own, the reason for this is probably contamination or invisible marine growth, which may create an electric current between the contacts. It is important that the dive computer is carefully washed in fresh water after the days diving is completed. The contacts can be cleaned with fresh water and, if necessary, a mild detergent and a soft brush. Sometimes it might be necessary to remove the instrument from the protective boot for cleaning. CARE OF YOUR DIVE COMPUTER NEVER try to open the case of the dive computer. Have your dive computer serviced every two years or after 200 dives (whichever comes first) by an authorized dealer or distributor. This service will include a general operational check, replacement of the battery, and water resistance check. The service requires special tools and training. Therefore, it is advisable to contact an authorized SUUNTO dealer or distributor for the biennial service. Do not attempt to do any servicing that you are not sure of. Should moisture appear inside the case or battery compartment, immediately have the instrument checked by your SUUNTO dealer or distributor. Should you detect scratches, cracks or other such flaws on the display that may impair its durability, immediately have it replaced by your SUUNTO dealer or distributor. Wash and rinse the unit in fresh water after every use. Protect the unit from shock, extreme heat, direct sunlight, and chemical attack. The dive computer cannot withstand the impact of heavy objects like scuba cylinders, nor chemicals like gasoline, cleaning solvents, aerosol sprays, adhesive agents, paint, acetone, alcohol, etc. Chemical reactions with such agents will damage the seals, case and finish. Store your dive computer in a dry place when you are not using it. The dive computer will display a battery symbol as a warning when the power gets too low. When this happens, the instrument should not be used until the battery has been replaced. Do not fasten the strap of your dive computer too tightly. You should be able to insert your finger between the strap and your wrist. Shorten the strap by cutting it if you do not expect to need the extra length. MAINTENANCE The instrument should be soaked, thoroughly rinsed with fresh water, then dried with a soft towel after each dive. Make sure that all salt crystals and sand particles have been flushed out. Check the display and the transparent battery compartment cover for possible moisture or water. DO NOT use the dive computer if you detect any moisture or water inside. In order to limit corrosion damage, remove the battery and moisture from the battery compartment. Contact an authorized Suunto dealer for battery replacement or other service. CAUTION! Do not use compressed air to blow water off the unit. Do not use solvents or other cleaning fluids that might cause damage. Do not test or use the dive computer in pressurized air. WATER RESISTANCE INSPECTION 44

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.You must frequently check the transparent battery compartment cover and 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 seriously damage the unit, even beyond repair. SUUNTO does not take any responsibility for damage caused by moisture in the dive computer unless the instructions of this manual are carefully followed. In the event of a leak, immediately take the dive computer to an authorized SUUNTO dealer or distributor. FAQs WHAT CAN I DO TO MY SUUNTO DIVING COMPUTER MYSELF? NOTE It is advisable to contact an authorized Suunto service, distributor or retailer for any repairs. Batteries and straps can be replaced by the user when the change is made in a proper manner to avoid any leakage of water into the battery compartment or computer. Original battery replacement and strap kits must be used.
Batteries can be changed by the user in all diving computers except Stinger, D4, D6 and D9. Instructions for changing batteries and straps can be found in the user manuals or at www.suunto.com and the user videos there. WHAT ARE ORIGINAL SUUNTO ACCESSORIES? Original Suunto accessories are only distributed through Suunto`s worldwide network of authorized Suunto distributors and retailers. Original Suunto accessories are tested to be compatible with Suunto products and can be used safely. NOTE Damage caused by non-original accessories will not be covered by warranty.
HOW TO GET MORE INFORMATION You can find service & warranty information in these pages by searching the FAQs. If you do not find the answer in the FAQs, you can also send a support request. To be able to send a support request you have to register in the system. REGISTER NOW. You can also contact our European help desk by telephone at +284 1160. The cost of the call is that of a normal call to Finland. The call center is open Mon-Fri, 24h/day. The service is provided in English all the time. Other languages - French, German, Swedish, Japanese, Spanish and Finnish are only provided during local business hours. Call center professionals can answer customer questions regarding diving products, outdoor products and compasses. HOW DO I KNOW IF MY SUUNTO PRODUCT IS COVERED BY WARRANTY? You can check the proof pf purchase, which has to be 2 years or less. You can also check the serial number of your unit. Does repairing my Suunto product extend the warranty? As far as the national laws permit, repairing the product does not extend or otherwise affect the warranty period. However, part(s) repaired or replacement product(s) provided during the warranty period will be warranted for the remainder of the original warranty period or for three (3) months from the date of repair or replacement, whichever is longer.

RESULTING FROM THE PURCHASE OR USE OF THE PRODUCT OR ARISING FROM BREACH OF THE WARRANTY, BREACH OF CONTRACT, NEGLIGENCE, STRICT TORT, OR ANY OTHER LEGAL OR EQUITABLE THEORY, EVEN IF SUUNTO KNEW OF THE LIKELIHOOD OF SUCH DAMAGES. SUUNTO SHALL NOT BE LIABLE FOR DELAY IN RENDERING SERVICE UNDER THE LIMITED WARRANTY, OR LOSS OF USE DURING THE TIME THE PRODUCT IS BEING REPAIRED.
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.

GLOSSARY

Altitude dive Ascent rate ASC RATE Ascent time ASC TIME Ceiling Central nervous system toxicity A dive made at an elevation greater than 300 m/1000 ft above sea level. The speed at which the diver ascends toward the surface. Abbreviation for ascent rate. The minimum amount of time needed to reach the surface on a decompression stop dive. Abbreviation for ascent time. On a decompression stop dive, the shallowest depth to which a diver may ascend based on computed nitrogen load. Toxicity 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. Abbreviation for central nervous system toxicity. Central nervous system toxicity limit fraction. Also note Oxygen Limit Fraction See "Tissue group". Abbreviation for Divers Alert Network. Abbreviation for decompression illness. Time spent at a decompression stop, or range, before surfacing, to allow absorbed nitrogen to escape naturally from tissues 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. 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. Commonly called "the bends" or "DCI". 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. Elapsed time between leaving the surface to descend, and returning to the surface at the end of a dive. Abbreviation for equivalent air depth. Abbreviation for enriched air nitrox. Also called nitrox or Enriched Air = EANx. Air that has some oxygen added. Standard mixes are EAN32 (NOAA Nitrox I = NN I) and EAN36 (NOAA Nitrox II = NN II). Nitrogen partial pressure equivalent table. The deepest depth during a decompression stop dive at which decompression takes place. After a change in ambient pressure, the amount of time required for the partial pressure of nitrogen in a theoretical compartment to go half way from its previous value to saturation at the new ambient pressure. A single or repetitive dive that includes time spent at various depths and whose no decompression limits are therefore not determined solely by the maximum depth attained. In sports diving, refers to any mix with a higher fraction of oxygen than standard air. United States National Oceanic and Atmospheric Administration. The maximum amount of time a diver may remain at a particular depth without having to make decompression stops during the subsequent ascent. Any dive which permits a direct, uninterrupted ascent to the surface at any time.

CNS CNS% Compartment DAN DCI Decompression Decompression range Decompression illness

Dive series

Dive time EAD EAN Enriched air nitrox
Equivalent air depth Floor Half time

Multi level dive

Nitrox NOAA No decompression time No decompression dive
NO DEC TIME OEA = EAN = EANx OLF OTU Oxygen tolerance unit Oxygen limit fraction O2% Oxygen partial pressure
Abbreviation for no decompression time limit. Abbreviations for oxygen enriched air nitrox. Abbreviation for oxygen limit fraction. Abbreviation for oxygen tolerance unit. Used to measure the whole-body-toxicity. A term used by Suunto for the values displayed in the oxygen toxicity bar graph. The value is either the CNS% or the OTU%. Oxygen percentage or oxygen fraction in the breathing gas. Standard air has 21% 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. Abbreviation for oxygen partial pressure. Abbreviation for Reduced Gradient Bubble Model. Modern algorithm for tracking both dissolved and free gas in divers. Any dive whose decompression time limits are affected by residual nitrogen absorbed during previous dives. The amount of excess nitrogen remaining in a diver after one or more dives. Abbreviation for surface interval time. Elapsed time between surfacing from a dive and beginning a descent for the subsequent repetitive dive. Theoretical concept used to model bodily tissues for the construction of decompression tables or calculations. Another form of oxygen toxicity, which is 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. Also called Pulmonary Oxygen Toxicity. See also OTU.
PO2 RGBM Reduced Gradient Bubble Model Repetitive dive Residual nitrogen SURF TIME Surface interval time Tissue group Whole-body toxicity
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