Suunto D4 manual

EN[...]

1. WELCOME TO THE WORLD OF SUUNT O DIVING INSTRUMENTS . . . . . . . . . . . . 7 2 . W A R N I N G S , C A U T I O N S , A N D N O T E S .............................................. 9 3 . S U U N T O D 4 A T A G L A N C E .......................................................... 1 5 3 . 1 . N a v i g a t i n g i n t h e m e n u s ................[...]

5 . 8 . D I V E m o d e s e t t i n g s .............................................................. 3 3 5 . 8 . 1 . S e t t i n g t h e d e p t h a l a r m ..................................................... 3 5 5.8.2. Setting the depth notify alarm (FREE mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 5 . 8 . 3 . S e t t i [...]

6 . 1 . 3 . A s c e n t r a t e i n d i c a t o r ........................................................ 5 2 6 . 1 . 4 . D e c o m p r e s s i o n d i v e s ....................................................... 5 3 6 . 2 . D i v i n g i n N I T R O X m o d e ( D I V E n i t r o x ) .......................................... 5 8 6 . 2 . 1 . B e [...]

9 . B A T T E R Y R E P L A C E M E N T ........................................................... 8 2 1 0 . T E C H N I C A L D A T A ................................................................... 8 3 1 0 . 1 . T e c h n i c a l s p e c i f i c a t i o n s ........................................................ 8 3 1 0 . 2 . R G B M .......[...]

1. WELCOME TO THE WORLD OF SUUNTO DIVING INSTRU- MENTS Suunto D4 was designed to help you get the most out of your diving. Suunto D4 simplifies your diving experience because all the information you need re- lating to depth, time and decompression status is available on one easy-to-read screen. 7[...]

T o get the most out of your Suunto D4 please read this instruction manual carefully and make sure you understand the use, displays, and limitations of the instrument before using it. T o make life easier , we've included a glossary of dive-specific termin- ology at the back of the manual. 8[...]

2. W ARNINGS, CAUTIONS, AND NOTES Throughout this manual, important safety icons are displayed. Three classifications are used to separate these icons by their order of importance: W ARNING is used in connection with a procedure or situation that could result in serious injury or death CAUTION is used in connection with a procedure or situation tha[...]

W ARNING 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 condi- tions that tend to increase the risk of decompression illness (DCI). Therefore, Suunto strongly recommends that the device is not used for any commercial or prof[...]

W ARNING SUUNTO STRONGL Y RECOMMENDS THA T SPORT DIVERS LIMIT THEIR MAXIMUM DEPTH TO 40 M/130 FT OR T O THE DEPTH CALCULA TED BY THE COMPUTER BASED ON THE SELECTED O 2 % AND A MAXIMUM PO 2 OF 1.4 BAR! W ARNING DIVES THA T REQUIRE DECOMPRESSION STOPS ARE NOT RECOMMENDED. YOU SHOULD ASCEND AND BEGIN DE- COMPRESSION IMMEDIA TEL Y WHEN THE DIVE COMPUTE[...]

W ARNING YOU ARE ADVISED TO A VOID FL YING ANY TIME THE COM- PUTER COUNTS DOWN THE NO-FL Y TIME. ALW A YS ACTIV- A TE THE COMPUTER TO CHECK THE REMAINING NO-FL Y TIME PRIOR TO FL YING! 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) [...]

W ARNING THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL PERCENT AGE V ALUES OF OXYGEN CONCENTRA TION. DO NOT ROUND UP FRACTIONAL PERCENT AGES! For example, 31.8% oxygen should be entered as 31%. Rounding up will cause nitrogen percentages to be understated and will affect decompres- sion calculations. If you want to adjust the computer to provide mor[...]

W ARNING This device contains a Lithium cell battery . T o 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 manu- facturer-specified batteries. Recycle or dispose of used batteries properly . NOTE It is not possible to change between AIR, NITROX and FR[...]

3. SUUNTO D4 A T A GLANCE U P D O W N S E L E C T M O D E Safety Stop Indicator No-Fly Icon Diver Attention Symbol Date Dual T ime Maximum Depth O 2 (Nitrox Mode) Time Ascent Rate Bar Graph Active Water Contact Indicator Seconds Display Stopwatch Weekday Dive T ime T emperature PO 2 (Nitrox Mode) OLF% (Nitrox Mode) Current T ime Display Mode Indica[...]

3.2. Button symbols and functions The table below explains the main functions of the dive computer's buttons. The buttons and their use will be explained in more detail in the relevant sections of the manual. 16[...]

T able 3.1. Button symbols and functions Main functions Press Button Symbol Switch between main modes Short MODE Switch from submode to main mode Activate backlight in DIVE mode Activate backlight in other modes Long MODE Select a submode Short SELECT Select and accept settings Displays Day History in FREE mode (free dive mode) T oggle between alte[...]

Main functions Press Button Symbol Enter Setting mode Long DOWN 18[...]

4. GETTING ST ARTED WITH YOUR SUUNTO D4 T o get the most out of your Suunto D4, take some time to personalize it and really make it YOUR computer . Set the correct time and date, as well as the alarms and tones, unit and backlight settings. Suunto D4 is a very user-friendly dive computer , and you will quickly become familiar with its functions. Ma[...]

NOTE The display is illuminated by holding down the MODE button for more than 5 seconds. Now that you know how to toggle between the shortcuts, you can start to set them. The following figure shows how to enter the TIME SETTINGS menu. 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / [...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ ADJUST WITH UP AND DOWN BUT TONS. ACCEPT WITH SELECT BUTTON. 4.1.2. Setting the time In the TIME SETTING mode, you are able to set the hour , minute, and second, as well as choose between 12 and 24 hour display . 4 / # . 6 - 2 $ + $ "[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ ADJUST WITH UP AND DOWN BUT TONS. ACCEPT WITH SELECT BUTTON. 4.1.4. Setting the date Use the DA TE SETTING mode to set the year , month, and day . The day of the week is automatically calculated in accordance with the date. 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ ADJUST WITH UP AND DOWN BUT TONS. ACCEPT WITH SELECT BUTTON. 4.1.6. Setting the backlight Use the BACKLIGHT SETTING mode to turn the backlight on or off and to define how long it stays on for (5, 10, 20, 30, or 60 seconds). When the backlight is turned off, it does not illumi[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ ADJUST WITH UP AND DOWN BUT TONS. ACCEPT WITH SELECT BUTTON. NOTE When the tones are off, there are no audible alarms. 4.2. Stopwatch The Suunto D4’s stopwatch measures elapsed and split times. 4.3. AC water contacts The water and data transfer contact is located on the sid[...]

Contamination or dirt on the water contact may prevent this automatic activation. It is therefore 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. U P D O W N S E L E C T M O D E 25[...]

5. BEFORE DIVING Do not attempt to use the dive computer without reading this user's manual in its en- tirety , including all the warnings. Make sure that you fully understand the use, displays, and limitations of the instrument. If you have any questions about the manual or the Suunto D4 please contact your Suunto representative before diving[...]

5.1. The Suunto RGBM/Deep Stop Algorithm Suunto’s Reduced Gradient Bubble Model (RGBM), utilized in the Suunto D4, 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 [...]

3. Stay there for as long as your air supply will safely allow . After reaching the sur- face, do not dive for at least 24 hours. 5.3. Dive computer limitations While the dive computer's calculations are based on current decompression research and technology , it is important to realize that the computer cannot monitor the actual physiological[...]

5.5. Free diving Free diving, and particularly Free diving in combination with scuba diving, may present risks that have not been researched and are not commonly known. Anyone who engages in any form of breath hold diving is in danger of shallow-water blackout (SWB), that is, the sudden loss of consciousness caused by oxygen starvation. Any breath [...]

T able 5.1. Audible and visual alarm types Alarm reason Alarm type Dive computer is activated. Short single beep Dive computer automatically returns to the TIME mode. No-decompression dive turns into a Decompression Stop dive. An arrow pointing upwards and the blinking ascent warning ASC TIME will appear . Three beeps with a three second interval a[...]

T able 5.2. Preset alarm types Alarm reason Alarm type Preset maximum depth has been exceeded. Continuous beep series for 24 seconds Maximum depth blinks as long as the current depth value exceeds the preset value. Preset dive time has been ex- ceeded. Continuous beep series for 24 seconds or until any button is pressed. Dive time blinks for one mi[...]

NOTE When the backlight is turned OFF , it does not illuminate when an alarm is activated. W ARNING WHEN THE OXYGEN LIMIT FRACTION INDICA TES THA T THE MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIA TEL Y T AKE ACTION TO REDUCE OXYGEN EXPOSURE. Failure to take action to reduce oxygen exposure after the warning is given can rapidly increase the risk of [...]

Once in the permanent Error mode, only the Er warning is shown in the center window . The dive computer will not show times for ascent or stops. However , all the other dis- plays will function as before to provide information for ascent. Y ou should immediately ascend to a depth of 3 to 6 m/10 to 20 ft and remain at this depth until air supply lim[...]

T able 5.4. FREE mode NITROX mode AIR mode Setting X X X Depth alarm X Depth notify alarm X X X Dive time alarm X Surf time notify alarm X Nitrox X X Personal/Altitude X X X Sample rate X X Deep stop X X RGBM X X X Units The following figure shows how to enter the DIVE mode settings menu. 34[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ USE UP AND DOWN BUT TONS TO TOGGLE BETWEEN DIVE SETTINGS. NOTE Some settings cannot be changed until 5 minutes has elapsed after the dive. 5.8.1. Setting the depth a[...]

The depth alarm is factory-set to 30 m/131 ft, but you can adjust it according to your personal preference, or switch it off altogether . The depth range can be set from 3m to 100 m/9 ft to 328 ft. 5.8.2. Setting the depth notify alarm (FREE mode) Y ou can set the depth notify alarm to indicate a certain depth, for example, start of free falling or[...]

5.8.4. Setting the nitrox values 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 addition, the oxygen partial pressure limit must be set. When in the NITROX setting mode, the equivalent allowed maximum depth, based on[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ ADJUST WITH UP AND DOWN BUT TONS. ACCEPT WITH SELECT BUTTON. 5.8.6. Setting the surface time notify alarm (FREE mode) Y ou can set a surface time notify alarm to indicate the length of the surface time before a new dive. Suunto D4 starts counting the time automatically when y[...]

5.8.8. Setting the Deep Stops If set to ON, iterative Deep Stops will be prompted. The length of the individual Deep Stops can be set to 1 or 2 minutes. 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ ADJUST WITH UP AND DOWN BUT TONS. ACCEPT WITH SELECT BUTTON. 5.8.9. Setting the RGBM values For certain divers and diving c[...]

5.9.1. Accessing DIVE mode The Suunto D4 has three diving modes: AIR mode for diving with standard air only , NITROX mode for diving with oxygen enriched mixtures, and FREE mode for free diving. The OFF mode disables the DIVE mode, and allows the TIME mode to be used un- derwater . The chosen dive mode is displayed when the DIVE mode is accessed, a[...]

At this time, perform your pre-checks, making sure that: • the instrument operates in the correct mode and provides a complete display (AIR/NITROX/FREE 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)[...]

5.9.3. Battery power indication T emperature or internal oxidation of the battery affect the battery voltage. If the instru- ment 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 indicatio[...]

When programming the instrument for the correct altitude, you need to select the correct Altitude Adjustment settings according to T able 5.5, Altitude Adjustment settings . The dive computer will adjust its mathematical model according to the entered altitude setting, giving shorter no-decompression times at higher altitudes (see T able 10.1, No-d[...]

5.9.5. Personal adjustments There are personal factors that can affect your susceptibility to DCI, which you can predict in advance, and input into the decompression model. Such factors vary between divers and also for the same diver from one day to another . The three-step Personal Adjustment setting is available if a more conservative dive plan i[...]

T able 5.6. Personal Adjustment settings Desired tables Condition Personal ad- justment value Default Ideal conditions P0 Progressively more conservative Some risk factors or conditions exist P1 Several risk factors or conditions exist P2 The Suunto D4 also allows experienced divers who are willing to accept a greater level of risk to adjust the RG[...]

T able 5.7. RGBM model settings Effect Desired T ables RGBM setting Full RGBM effects Standard Suunto RGBM model (Default) 100% Smaller RGBM effects, higher risk! Attenuated RGBM model 50% 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[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ WHEN STOP IS DISPLA YED, MAKE A RECOMMENDED SAFETY STOP FOR 3 MINUTES. NOTE The Recommended Safety Stop, as the name implies, is recom- mended. 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 mi[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ WHEN CEILING AND STOP ARE DISPLA YED , MAKE A ONE MINUTE MANDA T ORY SAFET Y STOP IN THE DEPTH ZONE BETWEEN 6 M AND 3 M. Y ou must not ascend shallower than 3 m/10 ft with the Mandatory Safety Stop warning on. If you ascend above the Mandatory Safety Stop ceiling, a downward pointing arrow will appear and a cont[...]

5.1 1. 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 D[...]

6. DIVING This section contains instructions on how to operate the dive computer and interpret its displays. Y ou’ll find that this dive computer is easy to use and read. Each display shows only the data relevant to that specific diving mode. 6.1. Diving in AIR mode (DIVEair) In this section, we look at how to make the most of the dive computer w[...]

• 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 Alternative displays, by pressing the UP/DOWN buttons, show: • the elapsed dive time in minutes, shown as DIVE TIME • the water temperature in °C/°F • the maximum depth during[...]

6.1.2. Bookmark It is possible to record bookmarks in the profile memory during a dive. These bookmarks are displayed when scrolling the profile memory on the display . The bookmarks will also be shown as annotations in the downloadable Suunto Dive Manager PC software. The bookmark logs the depth, time and water temperature. T o make a bookmark in [...]

6.1.4. Decompression dives When your NO DEC TIME becomes zero, your dive becomes a decompression dive so you must perform one or more decompression stops on your way to the surface. The NO DEC TIME on your display will be replaced by an ASC TIME, and a CEILING notation will appear . An upward pointing arrow will also prompt you to start your ascent[...]

W ARNING YOUR ACTUAL ASCENT TIME MA Y BE LONGER THAN DIS- PLA YED BY THE INSTRUMENT! The ascent time will increase if you: • remain at depth • ascend slower than 10 m/33 ft per minute • make your decompression stop deeper than at the ceiling These factors will also increase the amount of air required to reach the surface. Ceiling, ceiling zon[...]

The depth of the ceiling and floor will depend on your dive profile. The ceiling depth will be fairly shallow when you enter the decompression mode, but if you remain at depth, it will move downward and the ascent time will increase. Likewise, the floor and ceiling may change upwards while you are decompressing. When conditions are rough, it may be[...]

Display below the floor The blinking ASC TIME and an upward pointing arrow indicate that you are below the floor . Y ou should start your ascent immediately . The ceiling depth is shown on the left side, and the minimum total ascent time on the right side, of the center window . Below is an example of a decompression dive without Deep Stops, below [...]

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. 4 / # . 6 - 2 $ + $ " 3 , . # $ TWO ARR OWS POINT A T EACH O THER “HOUR GLASS” . YOU ARE IN THE OPTIMUM CEILING ZONE A T 3 M. [...]

4 / # . 6 - 2 $ + $ " 3 , . # $ DECOMPRESSION DIVE, ABOVE CEILING. NOTE DOWNW ARD POINTING ARROW , ER W ARNING AND ALARM. Y OU SHOULD IMMEDIA TL Y ( WITHIN 3 MINUTES) DESCEND TO OR BEL OW CEILING. In addition, an Error warning (Er) reminds you that you have only three minutes to correct the situation. Y ou must immediately descend to, or below[...]

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 PO 2 setting to affect oxygen exposure according to the entered O 2 % and PO 2 values. Calculations based on nitrox use re[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ NITROX DIVE MODE A CTIV A TION. MAXIMUM OPERA TIONAL DEPTH BASED ON SET O 2 % (21%) AND PO 2 (1.4 BAR) IS 56.7 M. If set to NITROX mode, the Suunto D4 will additionally show on the alternative display: • the oxygen percentage, labeled O 2 % • the set oxygen partial pressure limit, labeled PO 2 • the curren[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ UP BUTTON TOGGLES BETWEEN PO 2 , OLF , DIVE TIME AND W A TER TEMPERA TURE. 6.2.3. Oxygen limit fraction (OLF) If set to NITROX mode, in addition to tracking the diver's exposure to nitrogen, the in[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ The free dive ends as soon as you surface (at 0,5 m/ 1,6 ft). 4 / # . 6 - 2 $ + $ " 3 , . # $ NOTE The FREE mode does not provide decompression information. NOTE There is no ascent rate monitoring in the FREE mode. 6.3.1. Day History The Day History shows the free dive h[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ The Day History shows the average depth of all dives, the deepest depth of the day as well as the time, the longest dive, and the cumulative dive time in hours and minutes, as well as the number of dives made during the day . 4 / # . 6 - 2 $ + $ " 3 , . # $ NOTE The firs[...]

6.3.2. Free dive time limit The FREE mode has a time limit of 10 minutes. After 10 minutes, Suunto D4 will automatically change from free dive to scuba bottom timer . After the dive, the no-fly time will countdown from 48 hours. Also, you will not be able to dive in AIR or NITROX modes until the no-fly time has counted down to zero. Y ou can only s[...]

7. AFTER DIVING Once back at the surface, Suunto D4 continues to provide post-dive safety information and alarms. Calculations to enable repetitive dive planning also help to maximize diver safety . T able 7.1. Alarms Indication Symbol on display Diver Attention Symbol - Extend Surface Interval Violated Decompression Ceiling Do Not Fly Symbol 7.1. [...]

Or , in the alternative displays, the following information will be shown: • maximum depth of last dive in meters/feet • dive time of last dive in minutes, shown as DIVE TIME • the current time, shown as TIME • the current temperature in °C/°F If set to NITROX mode, the following information will also be shown: • the oxygen percentage l[...]

7.2.2. FREE Dive Dive series is only for one day . The day's dive numbering and latest dive information resets to 0 at midnight, and each day there is a new series of dives that is recorded in the log book. The dive is completed once you ascend beyond 0.5 m. A new dive will be registered in the log book immediately you descend once again. 7.3.[...]

• 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 2,400 m/8,000 ft) • Divers who plan to make daily , multiple dives for several days, or make dives that require decompression stops, should take special pr[...]

The dive time and date are registered in the Logbook memory . Always check before diving that the time and date are correctly set, especially after traveling between differ- ent time zones. 7.5.1. Dive Planning mode (MEMPlan) The Dive Planning mode displays no-decompression times for a new dive, taking into account the effects of previous dives. Wh[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ WHEN ENTERING THE MEMPLAN MODE THE DISPLA Y FIRST BRIEFL Y SHOWS THE REMAINING DESA TURA TION TIME BEFORE GOING INT O PLAN MODE. USE UP AND DOWN BUT TONS TO SCROLL D[...]

Dive numbering shown during dive planning Dives belong to the same repetitive dive series if the instrument was still counting down the no-fly time at the beginning of the dive. The surface interval must be at least 5 minutes for a dive to be considered a repetitive dive. Otherwise, it is considered a continuation of the same dive. The dive number [...]

• Maximum depth • date of dive • type of dive (AIR, NITROX, FREE, bottom timer (G)) • dive start time • dive number • oxygen percentage • total dive time (in minutes in AIR and NITROX modes, and minutes and seconds in FREE mode) Page II • maximum depth • surface time before previous dive • warnings Page III • graphical dive pr[...]

7.5.3. Dive history (MEMHistory) The dive history is a summary of all the dives recorded by the dive computer . Y ou can view both your scuba and free dive history . Scuba History The Scuba History can hold a maximum of 999 dives and 999 diving hours. When these maximum values are reached, the counters will start again from zero. SCUBA DIVE HISTORY[...]

4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ 4 / # . 6 - 2 $ + $ " 3 , . # $ The Free Dive history gathers history of the entire sequence of free dives. Unlike the day history , the Free Dive History is not reset. NOTE Y ou can reset all free dive data within the free dive history with the PC-Interface unit and the[...]

• depth profile of the dive • dive time • preceding surface interval time • dive number • dive start time (year , month, day and time) • dive computer settings • oxygen percentage settings and maximum OLF (in NITROX mode) • tissue calculation data • real-time water temperature • additional dive information (e.g. SLOW and Mandato[...]

7.7. www .suuntosports.com and Suunto Diving World at www .suunto.com/diving When you have dived and transferred your dive data to your Suunto Dive Manager , you can share your best experiences with other diving enthusiasts at SuuntoSports.com. It's a free and open Internet community where you can compare your underwater ex- periences with oth[...]

8. CARE AND MAINTENANCE OF MY SUUNTO DIVING COM- PUTER The SUUNTO dive computer is a sophisticated precision instrument. Although it is designed to withstand the rigors of scuba diving, you must treat it with the same proper care and caution as any other precision instrument. • W A TER CONT ACTS AND PUSH BUTTONS Contamination or dirt on the water[...]

• Should moisture appear inside the case, 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 . • W ash and rinse the unit in fresh water after e[...]

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 . • W A TER RESIST ANCE INSPECTION The water resistance of the unit must be checked after replacing the battery or after other service operations. [...]

WHA T 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 warran[...]

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 l[...]

9. BA TTER Y REPLACEMENT NOTE It is advisable to contact an authorized Suunto representative for battery replacement. It is imperative that the change is made in a proper manner to avoid any leakage of water into the battery compartment or computer . CAUTION Defects caused by improper battery installation are not covered by the warranty . CAUTION W[...]

10. TECHNICAL DA T A 10.1. T echnical specifications Dimensions and weight: • Diameter: 50.0 mm/1.97 in • Thickness: 16.0 mm/0.61 in • Weight: 85g/3.0 oz Depth gauge: • T emperature compensated pressure sensor • Salt water calibrated, in fresh water the readings are about 3% smaller (calibrated in compliance with EN 13319) • Maximum dep[...]

Displays only in NITROX mode: • Oxygen %: 21 - 50 • Oxygen partial pressure display: 0.5 - 1.6 bar • Oxygen Limit Fraction: 1 - 200% with 1% resolution Logbook/dive profile memory: • Air and Nitrox dive recording rate: default 20 seconds, adjustable 1, 10, 20, 30, 60s • Free dive recording rate: default 1 second, adjustable 1, 2, 5s • M[...]

Tissue calculation model: • Suunto Deep Stop RGBM algorithm (developed by Suunto and Bruce R. Wienke, BSc, MSc, PhD) • 9 tissue compartments • T issue compartment halftimes: 2.5, 5, 10, 20, 40, 80, 120, 240 and 480 minutes (on gassing). The off gassing halftimes are slowed down • Reduced gradient (variable) "M" values based on div[...]

• 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 in the unit at the factory) NOTE Low temperature or an internal oxidation of the battery may activ- ate the battery warning ev[...]

10.2.1. Suunto RGBM adaptive decompression The Suunto RGBM algorithm adapts its predictions of both the effects of microbubble build-up and adverse dive profiles in the current dive series. It also changes these calculations according to the personal adjustment you select. The pattern and speed of decompression at the surface is adjusted according [...]

10.2.2. No-decompression limits The no-decompression limits displayed by the dive computer for the first dive to a single depth (see T able 10.1, No-decompression time limits for various depths (m) and T able 10.2, No-decompression time limits for various depths (ft) .), are slightly more conservative than those permitted by the U.S. Navy tables. 8[...]

T able 10.1. No-decompression time limits for various depths (m) No-decompression time limits (mins) for various depths (m) for the first dive of a series Personal Mode / Altitude Mode Depth (m) P2/A2 P2/A1 P2/A0 P1/A2 P1/A1 P1/A0 P0/A2 P0/A1 P0/A0 75 45 29 96 54 35 130 67 43 96 54 35 130 67 43 163 89 57 130 67 43 163 89 57 -- 124 72 9 12 15 21 15 [...]

T able 10.2. No-decompression time limits for various depths (ft) No-decompression time limits (mins) for various depths (ft) for the first dive of a series Personal Mode / Altitude Mode Depth (ft) P2/A2 P2/A1 P2/A0 P1/A2 P1/A1 P1/A0 P0/A2 P0/A1 P0/A0 73 43 28 92 52 34 127 65 41 92 52 34 127 65 41 160 86 56 127 65 41 160 86 56 -- 120 69 30 40 50 20[...]

10.2.3. Altitude diving The atmospheric pressure is lower at high altitudes than at sea level. After traveling to a higher altitude, you will have additional nitrogen in your body , compared to the equilibrium situation at the original altitude. This "additional" nitrogen is released gradually over time and equilibrium is restored. It is [...]

Oxygen related information displayed by the dive computer is also designed to ensure that all warnings and displays occur at the appropriate phases of a dive. For example, the following information will be shown before and during a dive when the computer is set in NITROX mode: • the selected O 2 % on the alternative display • OLF% alternative d[...]

1 1. INTELLECTUAL PROPERTY 1 1.1. Copyright This user's manual is copyrighted and all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, or translated to any media without prior written consent from Suunto. 1 1.2. T rademark Suunto, D4, Consumed Bottom T ime (CBT), Oxygen Limit Fraction (OLF), Suunto Redu[...]

12. DISCLAIMERS 12.1. User ’ s responsibility This instrument is intended for recreational use only . Suunto D4 must not be used for obtaining measurements that require professional or industrial precision. 12.2. CE The CE mark is used to mark conformity with the European Union EMC directive 89/336/EEC FIOH, T opeliuksenkatu 41 a A, FI-00250 Hels[...]

13. SUUNTO LIMITED W ARRANTY FOR SUUNTO DIVING COM- PUTERS AND SUUNTO DIVING COMPUTER ACCESSORIES This Limited W arranty is valid as of January 1st, 2007. Suunto Oy ("Suunto") provides this limited warranty to those who have purchased the Suunto Diving computer and/or Suunto diving computer accessories ("Product"). Suunto warran[...]

W arranty Period The W arranty Period starts at the date of retail purchase by the original end-user purchaser . The Product may consist of several different parts, and the dif ferent parts may be covered by a different warranty period (hereinafter "W arranty Period"). The different W arranty Periods are: a. T wo (2) years for the diving [...]

2. user manuals or any third-party software (even if packed or sold with the Suunto hardware), settings, content or data, whether included or downloaded in the Product, or whether included during installment, assembly , shipping or at any other time in the delivery chain or otherwise and in any way acquired by you; 3. defects or alleged defects cau[...]

If a claim under this Limited Warranty appears to be necessary , please contact your local authorized Suunto retailer – for contact information please visit the Suunto website www .suunto.com or call a Suunto Help Desk (national or premium rates may apply) for further details on how to make a claim. Y ou will then be advised on how to bring your [...]

Other important notices Please remember to take backup copies of all important content and data stored in your Product because content and data may be lost during repair or replacement of the Product. Suunto or a Suunto Authorized Service Centre is not responsible for any damage or loss of any kind whatsoever resulting from loss of, damage to, or c[...]

Limitation of Liability TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE MANDA TORY LA WS, THIS LIMITED W ARRANTY IS YOUR SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED. SUUNTO SHALL NOT BE LIABLE FOR SPECIAL, INCIDENT AL, PUNITIVE OR CONSEQUENTIAL DAMAGES, INCLUDING BUT NOT LIMITED TO LOSS OF ANTICIP A TED BENEF[...]

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 repres- entative. 101[...]

GLOSSAR Y Altitude dive A dive made at an elevation greater than 300 m/1000 ft above sea level. Ascent rate The speed at which the diver ascends toward the surface. ASC RA TE Abbreviation for ascent rate. Ascent time The minimum amount of time needed to reach the surface on a decom- pression stop dive. ASC TIME Abbreviation for ascent time. Ceiling[...]

Decompression illness Any of a variety of maladies resulting either directly or indirectly from the formation of nitrogen bubbles in tissues or body fluids, as a result of inad- equately controlled decompression. Commonly called "the bends" or "DCI". Dive series A group of repetitive dives between which the dive computer indicat[...]

Nitrox In sports diving, refers to any mix with a higher fraction of oxygen than standard air . NOAA United States National Oceanic and Atmospheric Administration. No decompression time The maximum amount of time a diver may remain at a particular depth without having to make decompression stops during the subsequent as- cent. No decompression dive[...]

Reduced Gradient Bubble Model Modern algorithm for tracking both dissolved and free gas in divers. Repetitive dive Any dive whose decompression time limits are affected by residual nitro- gen absorbed during previous dives. Residual nitrogen The amount of excess nitrogen remaining in a diver after one or more dives. SURF TIME Abbreviation for surfa[...]

CUSTOMER SER VICE CONT ACTS Global Help Desk +358 2 284 1 1 60 Suunto USA Phone +1 (800) 543-9124 Canada Phone +1 (800) 776-7770 Suunto website www .suunto.com COPYRIGHT This publication and its contents are propriet ary to Suunto Oy . Suunto, W ristop Computer , Suunto D4 and their logos are registered or unregistered trademarks of Suunto Oy . All[...]

Suunto Oy 10/2007[...]