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1. WELCOME TO THE WORLD OF SUUNTO DIVING INSTRUMENTS ............ 7 2. WARNINGS, CAUTIONS, AND NOTES .............................................. 9 3. SUUNTO D4 AT A GLANCE .......................................................... 15 3.1. Navigating in the menus ......................................................... 15 3.2. Button symbols and functions ................................................... 16 4. GETTING STARTED WITH YOUR SUUNTO D4 .................................. 19 4.1.
5.8. DIVE mode settings .............................................................. 5.8.1. Setting the depth alarm ..................................................... 5.8.2. Setting the depth notify alarm (FREE mode) ............................. 5.8.3. Setting the dive-time alarm ................................................. 5.8.4. Setting the nitrox values .................................................... 5.8.5. Setting the personal/altitude adjustments ................................ 5.8.6.
6.1.3. Ascent rate indicator ........................................................ 6.1.4. Decompression dives ....................................................... 6.2. Diving in NITROX mode (DIVEnitrox) .......................................... 6.2.1. Before diving in NITROX mode ............................................ 6.2.2. Oxygen displays ............................................................. 6.2.3. Oxygen limit fraction (OLF) ................................................ 6.3.
9. BATTERY REPLACEMENT ........................................................... 82 10. TECHNICAL DATA ................................................................... 83 10.1. Technical specifications ........................................................ 83 10.2. RGBM ............................................................................ 86 10.2.1. Suunto RGBM adaptive decompression ................................ 87 10.2.2. No-decompression limits ...........................................
1. WELCOME TO THE WORLD OF SUUNTO DIVING INSTRUMENTS 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 relating to depth, time and decompression status is available on one easy-to-read screen.
To 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. To make life easier, we've included a glossary of dive-specific terminology at the back of the manual.
2. WARNINGS, CAUTIONS, AND NOTES Throughout this manual, important safety icons are displayed.
WARNING NOT FOR PROFESSIONAL USE! Suunto dive computers are intended for recreational use only. The demands of commercial or professional diving may expose the diver to depths and conditions that tend to increase the risk of decompression illness (DCI). Therefore, Suunto strongly recommends that the device is not used for any commercial or professional diving activities.
WARNING SUUNTO STRONGLY RECOMMENDS THAT SPORT DIVERS LIMIT THEIR MAXIMUM DEPTH TO 40 M/130 FT OR TO THE DEPTH CALCULATED BY THE COMPUTER BASED ON THE SELECTED O2% AND A MAXIMUM PO2 OF 1.4 BAR! 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.
WARNING YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COMPUTER COUNTS DOWN THE NO-FLY TIME. ALWAYS ACTIVATE THE COMPUTER TO CHECK THE REMAINING NO-FLY TIME PRIOR TO FLYING! Flying or traveling to a higher altitude within the no-fly time can greatly increase the risk of DCI. Review the recommendations given by Divers Alert Network (DAN) in Section 7.4. Flying after diving.
WARNING THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL PERCENTAGE VALUES OF OXYGEN CONCENTRATION. DO NOT ROUND UP FRACTIONAL PERCENTAGES! For example, 31.8% oxygen should be entered as 31%. Rounding up will cause nitrogen percentages to be understated and will affect decompression calculations. If 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.
WARNING 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. NOTE It is not possible to change between AIR, NITROX and FREE DIVE modes before the instrument has counted down the no-fly time.
3.
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.
Table 3.1.
Symbol 18 Button Press Main functions DOWN Long Enter Setting mode
4. GETTING STARTED WITH YOUR SUUNTO D4 To 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. Make absolutely sure that you know your computer and have it set up as you want it BEFORE getting into the water. 4.1.
The display is illuminated by holding down the MODE button for more than 5 seconds. NOTE 4/ 4/ 4/ 4/ "3 +$ "3 +$ 2$ "3 +$ 2$ "3 +$ 2$ 2$ 6- 6- 6- 6- 6- #. #. #. #. #. 4/ +$ 2$ #$ #$ #$ #$ #$ ,. ,. ,. ,. ,. "3 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. USE UP AND DOWN BUTTONS TO TOGGLE BETWEEN ALARM, TIME, DUAL TIME, DATE, UNITS, BACKLIGHT AND TONES. 4.1.1.
4/ 4/ "3 +$ "3 +$ 2$ 2$ 6- 6- #. #. 6- 4/ "3 +$ 2$ #$ #$ #$ ,. ,. ,. #. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4/ "3 +$ 2$ 6- 6- #. #. 4/ +$ 2$ #$ #$ ,. ,. "3 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. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.3.
6- 4/ "3 +$ 2$ #. 6- 4/ "3 +$ 2$ #$ #$ ,. ,. #. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4/ "3 +$ 2$ 6- 6- #. #. 4/ +$ 2$ #$ #$ ,. ,. "3 4.1.4. Setting the date Use the DATE SETTING mode to set the year, month, and day. The day of the week is automatically calculated in accordance with the date. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.5.
6- 4/ "3 +$ 2$ #. 6- 4/ "3 +$ 2$ #$ #$ ,. ,. #. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4/ "3 +$ 2$ 6- 6- #. #. 4/ +$ 2$ #$ #$ ,. ,. "3 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 illuminate when an alarm sounds. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.7.
6- 4/ "3 +$ #. 6- 4/ 2$ "3 +$ 2$ #$ #$ ,. ,. #. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. When the tones are off, there are no audible alarms. NOTE 4.2. Stopwatch The Suunto D4’s stopwatch measures elapsed and split times. 6- 4/ +$ 2$ #$ #. 24 ,. "3 4.3. AC water contacts The water and data transfer contact is located on the side of the case.
DO WN UP LE DE SE MO CT 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.
5. BEFORE DIVING Do not attempt to use the dive computer without reading this user's manual in its entirety, including all the warnings. Make sure that you fully understand the use, displays, and limitations of the instrument. If you have any questions about the manual or the Suunto D4 please contact your Suunto representative before diving with the dive computer.
#. 6- 4/ +$ #$ 2$ ,. "3 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 to adapt to a variety of situations and dive profiles. YOU ARE ADVISED TO MAKE A DEEPSTOP AT 12 M.
3. Stay there for as long as your air supply will safely allow. After reaching the surface, 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 functions of an individual diver. All decompression schedules currently known to the authors, including the U.S.
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 hold diving results in some nitrogen build-up in the blood and other fast tissues.
Table 5.1. Audible and visual alarm types Alarm type Short single beep Alarm reason Dive computer is activated. Dive computer automatically returns to the TIME mode. Three beeps with a three No-decompression dive turns into a Decompression second interval and activated Stop dive. An arrow pointing upwards and the blinking backlight ascent warning ASC TIME will appear. Continuous beeps and activ- Maximum allowed ascent rate, 10 m per min/33 ft per min, is exceeded.
Table 5.2. Preset alarm types Alarm type Alarm reason Continuous beep series for 24 seconds Maximum depth blinks as long as the current depth value exceeds the preset value. Preset maximum depth has been exceeded. Continuous beep series for 24 seconds or until any button is pressed. Dive time blinks for one minute. Preset dive time has been exceeded. Continuous beep series for 24 seconds or until any button is pressed. Current time blinks for one minute Preset alarm time is reached. Table 5.3.
NOTE When the backlight is turned OFF, it does not illuminate when an alarm is activated. WARNING WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE ACTION TO REDUCE OXYGEN EXPOSURE. Failure to take action to reduce oxygen exposure after the warning is given can rapidly increase the risk of oxygen toxicity, injury, or death. 5.7.
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 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. After surfacing, you should not dive for a minimum of 48 hours.
Table 5.4. Setting AIR mode NITROX mode FREE mode Depth alarm X X Depth notify alarm Dive time alarm X X X X Surf time notify alarm X X Nitrox X Personal/Altitude X X Sample rate X X Deep stop X X RGBM X X Units X X X X The following figure shows how to enter the DIVE mode settings menu.
4/ 4/ 4/ "3 +$ 2$ "3 +$ 2$ +$ 2$ 2$ 4/ 6- 6- 6- 6- #. #. #. #. 6- 4/ "3 "3 +$ "3 +$ 2$ #$ #$ #$ #$ #$ ,. ,. ,. ,. ,. #. USE UP AND DOWN BUTTONS TO TOGGLE BETWEEN DIVE SETTINGS. Some settings cannot be changed until 5 minutes has elapsed after the dive. NOTE 4/ "3 +$ 2$ 6- 6- #. #. 4/ +$ 2$ #$ #$ ,. ,. "3 5.8.1. Setting the depth alarm You can set a depth alarm in the dive computer. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON.
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) You can set the depth notify alarm to indicate a certain depth, for example, start of free falling or mouth filling in free diving. 4/ "3 +$ 2$ 6- 4/ +$ #$ 2$ ,. #. 6- 36 #$ #. NOTE ,. "3 5.8.3.
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 the chosen setting, will also be displayed. The default oxygen percentage (O2%) setting is 21% (air) and oxygen partial pressure (PO2) setting 1.4 bar.
6- 6- 4/ "3 +$ 2$ #. #. 4/ "3 +$ #$ #$ 2$ ,. ,. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.8.6. Setting the surface time notify alarm (FREE mode) You 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 you surface (at 0,5 m/1,6 ft). 6- 4/ "3 +$ 2$ #. 6- 4/ +$ #$ 2$ ,. #$ #. 38 ,. "3 5.8.7.
6- 6- 4/ "3 +$ 2$ #. #. 4/ +$ #$ #$ 2$ ,. ,. "3 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. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 6- 6- 4/ "3 +$ 2$ #. #. 4/ +$ #$ #$ 2$ ,. ,. "3 5.8.9. Setting the RGBM values For certain divers and diving conditions, it may be desirable to set the attenuated RGBM mode.
4/ 4/ 4/ 4/ "3 +$ "3 +$ 2$ "3 +$ 2$ "3 +$ 2$ 2$ 6- 6- 6- 6- 6- #. #. #. #. #. 4/ +$ 2$ #$ #$ #$ #$ #$ ,. ,. ,. ,. ,. "3 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 underwater.
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) • the instrument displays the correct temperature and depth (0.
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, reenter DIVE mode to receive the battery power indication. After the battery check, the Low Battery Warning is indicated by the battery symbol.
When programming the instrument for the correct altitude, you need to select the correct Altitude Adjustment settings according to Table 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 Table 10.1, No-decompression time limits for various depths (m) and Table 10.2, No-decompression time limits for various depths (ft) in Section 10.2. RGBM). Table 5.5.
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 is desired and, for very experienced divers, a two step adjustment for RGBM effect on repetitive dives is available.
Table 5.6. Personal Adjustment settings Personal ad- Condition justment value Desired tables P0 Ideal conditions Default P1 Some risk factors or conditions exist Progressively more conservative P2 Several risk factors or conditions exist The Suunto D4 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.
Table 5.7. RGBM model settings RGBM setting Desired Tables Effect 100% Standard Suunto RGBM model (Default) Full RGBM effects 50% 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.
6- 4/ "3 +$ #$ 2$ ,. #. NOTE 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.
6- 4/ "3 +$ #$ 2$ ,. #. WHEN CEILING AND STOP ARE DISPLAYED, MAKE A ONE MINUTE MANDATORY SAFETY STOP IN THE DEPTH ZONE BETWEEN 6 M AND 3 M. #. 6- 4/ +$ #$ 2$ ,. "3 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.
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. You’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- 4/ +$ 2$ #$ #. NOTE ,. "3 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 AIR mode, please see Section 5.9.1. Accessing DIVE mode.
"3 +$ 2$ "3 +$ 2$ 4/ #$ #. 6- 6- 4/ +$ 2$ 4/ DOWN BUTTON TOGGLES BETWEEN MAXIMUM DEPTH AND CURRENT TIME. ,. #$ #. 4/ 6- ,. "3 #. 6+$ #$ #$ #. 2$ ,. ,.
6- 6- 4/ "3 +$ 2$ #. #. 4/ +$ #$ #$ 2$ ,. ,. "3 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. To make a bookmark in the profile memory during a dive, press the SELECT button. A brief confirmation will be given.
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. If you exceed the no-decompression limits on a dive, the dive computer will provide the decompression information required for ascent.
WARNING YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DISPLAYED BY THE INSTRUMENT! The ascent time will increase if you: • remain at depth • ascend slower than 10 m/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 zone, floor and decompression range When in decompression, it is important that you understand the meaning of ceiling, floor, and decompression range.
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 difficult to maintain a constant depth near the surface.
#. 6- 4/ +$ #$ 2$ ,. "3 Display below the floor The blinking ASC TIME and an upward pointing arrow indicate that you are below the floor. You 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 the floor. UPWARD POINTING ARROW, BLINKING ASC TIME AND AN ALARM TELL YOU TO ASCEND.
#. 6- 4/ +$ #$ 2$ ,. "3 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 8 MINUTES. During the decompression stop, ASC TIME will count down towards zero. When the ceiling moves upwards, you can ascend to the new ceiling.
6- 4/ "3 +$ #$ 2$ ,. #. DECOMPRESSION DIVE, ABOVE CEILING. NOTE DOWNWARD POINTING ARROW, ER WARNING AND ALARM. YOU SHOULD IMMEDIATLY (WITHIN 3 MINUTES) DESCEND 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. If you continue to violate the decompression, the dive computer will go into a permanent Error Mode.
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.
"3 2$ #$ +$ ,. 6- 4/ #. NITROX DIVE MODE ACTIVATION. MAXIMUM OPERATIONAL DEPTH BASED ON SET O2% (21%) AND PO2 (1.4 BAR) IS 56.7 M. 4/ "3 +$ "3 +$ 2$ 2$ 6- 6- 4/ #. #. 6- 4/ +$ #$ #$ 2$ ,. ,. #$ #. 60 ,.
4/ 4/ "3 +$ "3 +$ 2$ "3 +$ 2$ 2$ 6- 6- 6- 4/ #. #. #. 6- 4/ "3 +$ #$ #$ #$ #$ 2$ ,. ,. ,. ,. #. UP BUTTON TOGGLES BETWEEN PO2, OLF, DIVE TIME AND WATER TEMPERATURE. 6.2.3. Oxygen limit fraction (OLF) If set to NITROX mode, in addition to tracking the diver's exposure to nitrogen, the instrument tracks the exposure to oxygen. These calculations are treated as entirely separate functions.
"3 +$ 6- 4/ 2$ #. 6- 4/ "3 +$ #$ #$ 2$ ,. ,. #. #. 6- 4/ +$ #$ 2$ ,. "3 The free dive ends as soon as you surface (at 0,5 m/ 1,6 ft). 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 history of your latest diving day. In the Surface mode you can enter the Day History by pressing the SELECT button.
6- 4/ "3 +$ #. 6- 4/ 2$ "3 +$ #$ #$ 2$ ,. ,. #. 6- 4/ +$ 2$ #$ #. NOTE ,. "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. The first dive of the next day will reset the Day History and start a new one.
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. You can only set the Dive mode to OFF. NOTE 64 If you want to dive in AIR or NITROX mode after diving in FREE mode, remember to switch to the correct mode.
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. Table 7.1. Alarms Symbol on display Indication Diver Attention Symbol - Extend Surface Interval Violated Decompression Ceiling Do Not Fly Symbol #. 6- 4/ +$ #$ 2$ ,. "3 7.1. Surface interval An ascent to any depth shallower than 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 labeled O2% • the oxygen partial pressure labeled PO2 • the current oxygen toxicity exposure labeled OLF 7.2. Dive numbering 7.2.1.
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 precautions and wait for an extended interval beyond 12 hours before a flight.
The dive time and date are registered in the Logbook memory. Always check before diving that the time and date are correctly set, especially after traveling between different time zones. 7.5.1. Dive Planning mode (MEMPlan) The Dive Planning mode displays no-decompression times for a new dive, taking into account the effects of previous dives. When entering the (MEMPlan) mode, the display first briefly shows the remaining desaturation time before going into plan mode.
4/ 4/ "3 +$ 2$ +$ 2$ "3 +$ 2$ "3 +$ 2$ "3 4/ 6- 6- 6- 6- 4/ #. #. #. #. 6- 4/ "3 +$ #$ #$ #$ #$ #$ 2$ ,. ,. ,. ,. ,. #. WHEN ENTERING THE MEMPLAN MODE THE DISPLAY FIRST BRIEFLY SHOWS THE REMAINING DESATURATION TIME BEFORE GOING INTO PLAN MODE. USE UP AND DOWN BUTTONS TO SCROLL DIFFERENT NO-DECOMPRESSION LIMITS. NO-DECOMPRESSION LIMITS LONGER THAN 99 MINUTES ARE DISPLAYED AS “–”.
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 will not change and the dive time will continue where it left off. (See also Section 7.2. Dive numbering ).
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 profile • • • • • • • NOTE The memory will retain approximately the last 80 hours (20 second sample rate) of dive time. After that, when new dives are added, the oldest dives are deleted.
7.5.3. Dive history (MEMHistory) The dive history is a summary of all the dives recorded by the dive computer. You can view both your scuba and free dive history. SCUBA DIVE HISTORY DISPLAY. TOTAL NUMBER OF DIVES, DIVE HOURS AND MAXIMUM DEPTH. 4/ "3 +$ "3 +$ 2$ 2$ 6- 6- 4/ #. #. 6- 4/ +$ #$ #$ 2$ ,. ,. #$ #. NOTE ,. "3 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.
4/ "3 +$ "3 +$ 2$ 2$ 6- 6- 4/ #. #. 6- 4/ "3 +$ #$ #$ #$ 2$ ,. ,. ,. #. 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 You can reset all free dive data within the free dive history with the PC-Interface unit and the downloadable Suunto Dive Manager software. 7.6.
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.
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 experiences with other Suunto users and learn from each other. SuuntoSports.com includes three sections. In My Suunto you can register your dive computer and manage your membership profile.
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.
• • 78 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. • Wash and rinse the unit in fresh water after every use. • Protect the unit from shock, extreme heat, direct sunlight, and chemical attack.
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 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 display for any sign of leaks.
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.
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.
9. BATTERY 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 When the battery is changed, all nitrogen and oxygen uptake data is lost.
10. TECHNICAL DATA 10.1. Technical specifications Dimensions and weight: • Diameter: 50.0 mm/1.97 in • Thickness: 16.0 mm/0.61 in • Weight: 85g/3.
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 • Memory capacity: approximately 80 hours of diving with 20 second recording interval • Depth accuracy: 0.
Tissue calculation model: • Suunto Deep Stop RGBM algorithm (developed by Suunto and Bruce R. Wienke, BSc, MSc, PhD) • 9 tissue compartments • Tissue 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 diving habit and dive violations. The "M" values are tracked up to 100 hours after a dive • The EAN and oxygen exposure calculations are based on recommendations by R.W.
• • 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 activate the battery warning even though the battery has enough capacity. In this case, the warning usually disappears when the DIVE mode is activated again. 10.2.
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 to microbubble influence. On repetitive dives, adjustment may also be applied to the maximum allowable nitrogen overpressure in each theoretical tissue group.
10.2.2. No-decompression limits The no-decompression limits displayed by the dive computer for the first dive to a single depth (see Table 10.1, No-decompression time limits for various depths (m) and Table 10.2, No-decompression time limits for various depths (ft) .), are slightly more conservative than those permitted by the U.S. Navy tables.
Table 10.1.
Table 10.2.
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 recommended that you acclimatize to a new altitude by waiting at least three hours before making a dive.
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.
11. INTELLECTUAL PROPERTY 11.1. 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. 11.2. Trademark Suunto, D4, Consumed Bottom Time (CBT), Oxygen Limit Fraction (OLF), Suunto Reduced Gradient Bubble Model (RGBM), and Continuous Decompression and their logos are all registered or unregistered trademarks of Suunto. All rights are reserved. 11.3.
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, Topeliuksenkatu 41 a A, FI-00250 Helsinki, Finland, notified body no.0430, has EC type-examined this type of personal protective equipment.
13. SUUNTO LIMITED WARRANTY FOR SUUNTO DIVING COMPUTERS AND SUUNTO DIVING COMPUTER ACCESSORIES This Limited Warranty 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").
Warranty Period The Warranty Period starts at the date of retail purchase by the original end-user purchaser. The Product may consist of several different parts, and the different parts may be covered by a different warranty period (hereinafter "Warranty Period"). The different Warranty Periods are: a. Two (2) years for the diving computers; b.
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.
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. You will then be advised on how to bring your Product for warranty service. Should you wish to return the Product by shipping it to your local authorized Suunto retailer, please use prepaid freight.
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 corruption of content or data during repair or replacement of the Product.
Limitation of Liability TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE MANDATORY LAWS, THIS LIMITED WARRANTY IS YOUR SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED.
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 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 RATE Abbreviation for ascent rate. Ascent time The minimum amount of time needed to reach the surface on a decompression stop dive. ASC TIME Abbreviation for ascent time. Ceiling On a decompression stop dive, the shallowest depth to which a diver may ascend based on computed nitrogen load.
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 inadequately controlled decompression. Commonly called "the bends" or "DCI". Dive series 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.
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 ascent. No decompression dive Any dive which permits a direct, uninterrupted ascent to the surface at any time. NO DEC TIME Abbreviation for no decompression time limit.
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 nitrogen absorbed during previous dives. Residual nitrogen The amount of excess nitrogen remaining in a diver after one or more dives. SURF TIME Abbreviation for surface interval time. Surface interval time Elapsed time between surfacing from a dive and beginning a descent for the subsequent repetitive dive.
CUSTOMER SERVICE CONTACTS Global Help Desk Suunto USA Phone Canada Phone Suunto website +358 2 284 11 60 +1 (800) 543-9124 +1 (800) 776-7770 www.suunto.com COPYRIGHT This publication and its contents are proprietary to Suunto Oy. Suunto, Wristop Computer, Suunto D4 and their logos are registered or unregistered trademarks of Suunto Oy. All rights reserved.
Suunto Oy 10/2007
