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Suunto COBRA Instruction Manual

1. TIME KEEPING AND STAND BY MODE SURFACE MODE eS aaa MODES AND battery OPERATIONS check nitrox gauge display J or Bookmarkin oy Y Activate the timekeeping display plan Time amp Alternative Display s the profile memory 3 MODE OPTIONS v ca am 1 MEMORY harn 2 SIMUL ia A Y 3 SET OPTIONS 2 SIMULation OPTIONS 3 MEMORY OPTIONS tty iti tti am 3 SET GUT 1 SET 2 SIMPLAN GUT 1 SIMDIVE 3TR PC mD 1 LOGBOOK lt Gur PREFerences DIVE acy 2SET Gates TRARA mr a HISTORY ae interval hours interval minutes ive simulation a B ei n ojana O Ca atea e Gs Gis Ry GD ter ca page a rm apase 1 L siMulate PLANning lt simulate divin Eeten EH Page 2 nceasedepthan decrease dept simulate diving Pecan pages C aur m 2 3 SET PREF OPTIONS 3 SET TIME OPTION Tey 3 4 SET DIVE OPTIONS yay 2a 4 NITROX th 1 Adj MODE 3 MODEL am 1 LIGHT 3 T ALARM am 1 Adj TIME aa KO D en ue B UNTTS er SD Lp RADA E Bi E aS ta way eare z G c3 AOAN A2 AR Gat backlight cod eia aw o EAA e oz 3 MAX DPTH 2d ALARM GD anal wos Av ie ae
2. 5 8 4 Diving at altitude The dive computer can be adjusted both for diving at altitude and also to increase the conservatism of the mathematical nitrogen model When programming the instrument for the correct altitude you need to select the correct Altitude Adjustment settings according to Table 5 4 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 46 Table 5 4 Altitude Adjustment settings Alt adjustment Symbol on display Altitude range value AO 0 300 m 0 1000 ft A1 A 300 1500 m 1000 5000 ft A2 A 1500 3000 m 5000 10 000 ft AN Z NOTE Section 5 7 1 Setting the personal altitude adjustments 1 AdJ MODE describes how the Altitude value is set WARNING Traveling to a higher elevation can temporarily cause a change in the equilibrium of dissolved nitrogen in the body It is recom mended that you acclimatize to the new altitude by waiting at least three 3 hours before diving 5 8 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 There is available a three step Personal Adjustment setting if a more conservative dive plan is desired and a two step adjustme
3. Figure 6 15 Alternative display Pressing TIME button displays current time maximum depth temperature CBT and 02 if Air Time is less than 30 minutes After five seconds the display will automatically revert to the original display 6 2 3 Oxygen limit fraction OLF If set to the 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 The dive computer calculates separately for Central Nervous System oxygen toxicity CNS and Pulmonary Oxygen toxicity the latter measured by the addition of Oxygen Toxicity Units OTU Both fractions are scaled so that the maximum tolerated exposure for each is expressed as 100 73 The Oxygen Limit Fraction OLF has 11 segments each representing 10 The Oxygen Limit Fraction OLF displays only the value of the higher of the two calcu lations The oxygen toxicity calculations are based on the factors listed in Section 10 3 Oxygen exposure When the OTU value meets and exceeds the CNS value then in addition to displaying its percentage the lowest segment blinks to indicate that the value shown relates to OTU Figure 6 16 The lowest bar graph blinks to indicate that the OLF value shown relates to OTU 74 6 3 Diving in the GAUGE mode If set to Gauge mode the dive computer can be used for diving with technical diving mixed gases If you are trained for technica
4. 2 SET TIME 3 T ALARM After entering this mode you are able to set the desired alarm time 26 Figure 4 6 Adjusting the Daily Alarm setting mode 3 T ALARM 4 1 2 Setting Preferences 3 SET PREF To enter the Setting Preferences mode select MODE 3 SET 3 SET PREF The Time Setting mode has three options 1 Time 2 Date and 3 Daily Time Alarm Backlight Setting 1 LIGHT In the Backlight Setting mode the backlight can be turned off or on and the on time can be set to be 5 to 30 seconds To enter the Backlight Setting mode select MODE 3 SET 3 SET PREF 1 LIGHT NOTE When the backlight turned OFF it does not illuminate when an alarm is given 27 Figure 4 7 Setting Backlight On Time Press scroll buttons to change backlight on off and to set time value Dive Computer Units Setting Metric Imperial 2 UNITS To enter the Dive Computer Units Setting mode select MODE 3 SET 3 SET PREF 2 UNITS This will enable you to choose between metric and imperial units Figure 4 8 Setting Metric Imperial units 28 Dive Computer Model Settings Air Nitrox Gauge 3 MODEL In the Dive Computer Model Setting mode the dive computer can be set to be an AIR computer NITROX computer or a depth GAUGE with a timer To enter the Dive Computer Model Setting mode select MODE 3 SET 3 SET PREF 3 MODEL Figure 4 9 Setting Dive Computer model 4 2 AC water contacts The water contacts control the automatic activ
5. ALARM 00 ceeeeeeeeeees 40 5 7 3 Setting the maximum depth alarm 3 MAXDPTH 00 40 5 7 4 Setting the nitrox values 4 NITROX 0 ceceee eect ee eeee ees 41 5 8 Activation and pre cheCcks 0 cece cece cece ee ee eee e tenet teense ee eeee 42 5 8 1 Accessing DIVE mode c ccc ee cece cece ee eee e ee teaeeeeeaees 42 5 8 2 DIVE mode activation yor inerat anak a EaD entered 43 5 8 3 Battery power indication 0 ccc ceee eee eee eee eee eee eeeeeeeaees 45 5 8 4 Diving at altitudes sirean irena atenh a EE ANE ented i auat 46 5 8 5 Personal adjustments cccceeeeeee eee eee eee eeeeeeeeaeeeeeaees 47 5 9 Safety SIOPS a1 gs ess esate saa tants qedaguban ouite na nbadevv EEA EEEN ET bak 49 5 9 1 Recommended Safety Stops 20 cece eeeee ee eect ee eeeee eens 50 5 9 2 Mandatory Safety Stops cc cece eee e cece ee eee ee teat eeeeaees 51 62 DIVING fg iic ches a aa See Ea E Bagh edd LERAREN ee TAAUA 53 6 1 Diving in AIR mode eisir ns anii a Ceca E a e neng arden 53 6 11 Basic dive datas enra agi a r E cant ES r neck eeu testi 54 6 152 BOOKMArK sess irern enexdniente tones heeins cuen daa E O DAA a dees aencetnne 56 6 1 3 Cylinder pressure data 00 ccc ccee eee eee ee eee ee te eeeeeeeaee ees 57 6 1 4 Consumed Bottom Time CBT cc cece eee ee eens eee enee ee eeee 59 6 1 5 As
6. Simulator 2 SIMPLAN 20eeeeeeeeeeeeeees 94 CARE AND MAINTENANCE OF MY SUUNTO DIVING COMPUTER 96 gt BATTERY REPLACEMENT raae A nia eee eden ss 99 9 1 Battery Kits 2 00 aes et aai oendaa isda ned ide NaS A nE Aa DEA sal AEE DA ited 99 9 2 Required toolSiicce sssaacccatse chal asa gene A a ao lade deel aAa S TIA ek 99 9 3 Replacing the battery ccc cece cece eee eee ee eee ee eee eeeeeeneaeees 100 9 4 DISPLAY SHIELD REPLACEMENT 0cseceeeeeeeeeeeee tence 102 9 5 COMPASS ATTACHMENT 0 ceceeteee entree eee ee tee eaeeeeeaeeeees 102 10 TECHNIGAL DATA ava aama ire eaten andes aes 103 10 1 Technical specifications cc cece cece eee eee eee ee iei Dai 103 10 2 RGBM cic ke aad E E DEUE PEE E WEEE EN TE Meg EOE wh Scie 106 10 2 1 Suunto RGBM adaptive decompression eeeeeeeeees 107 10 2 2 No decompression limits for air 00 ccccee ee eeee ee eeee eens 108 10 2 3 Altitude diVING eiea ae rana aaa a he iiae Re annie tines 110 10 3 Oxygen EXPOSUre narei inaianei i tI niiina ia MRA EET AAE 111 11 INTELLECTUAL PROPERTY eceeceee eee eet teeta tees teeeeeeeeeeeenes 113 AA RAGDOMALK rondar ha Seda ritah Saat awandads Mama dastad EEE ON Ea 113 TAD Copyright ra eee e a e ea Roe letolica tale ATAA ei haan deen es 113 11 3 Patent Notite iee n aeda aa tates tes tows tetansetend eter 113 12 DISCLAIMERS sseni
7. Spl ten Se fae EEA a En eena lt ime S C EE CEE 2 CE a5 alarm dep DT minutes or G SUUNTO HELP DESK Global 358 2 284 1160 USA toll free 1 800 543 9124 Canada toll free 1 800 267 7506 www suunto com SUUNTO Copyright Suunto Oy 02 2004 09 2006 09 2011 Suunto is a registered trademark of Suunto Oy All Rights reserved
8. Surface interval time average depth and consumed air indicated by AP Page IV e dive number in the dive series e the profile of the dive profile automatic scrolling during which logbook symbol blinks when the user has pressed the PLAN button for Bookmark blinking SLOW label when registered blinking ASC TIME label when the dive became a decompression dive 86 Figure 7 8 Logbook page IV Profile of a specific dive Press the SMART Select button once to change the scroll buttons to scroll the different dives forward and backward Press the SMART gt Select button again to change function of the scroll buttons back to scroll the different pages of the selected dive When searching the dives only the page 1 is shown The END text is displayed between the oldest and the most recent dive B NOTE The memory will retain approximately the last 36 hours of dive time After that when new dives are added the oldest dives are deleted The contents of the memory will remain when the battery is changed providing that the battery has been replaced according to the instructions NOTE Several repetitive dives are considered to belong to the same repetitive dive series if the no fly time has not ended See Sec tion 7 2 Dive numbering for further information 87 Dive Profile memory PROF The scrolling of the profile will start automatically when the Logbook page IV PROF is entered With the default setting the dive profile
9. Suunto Authorized Service Center hereinafter Service Center will at its sole discretion remedy defects in materials or workmanship free of charge either by a repairing or b replacing or c refunding subject to the terms and conditions of this Limited Warranty This Limited Warranty is only valid and enforceable in the country of purchase unless local law stipulates otherwise Warranty Period The Limited Warranty Period starts at the date of original retail purchase The Warranty Period is two 2 years for display devices The Warranty Period is one 1 year for accessories and consumable parts including but not limited to chargeable batteries chargers docking stations straps cables and hoses Exclusions and Limitations This Limited Warranty does not cover 1 a normal wear and tear b defects caused by rough handling or c defects or damage caused by misuse contrary to intended or recommended use 2 user manuals or any third party items 3 defects or alleged defects caused by the use with any product accessory software and or service not manufactured or supplied by Suunto 4 replaceable batteries This Limited Warranty is not enforceable if item 1 has been opened beyond intended use 2 has been repaired using unauthorized spare parts modified or repaired by unau thorized Service Center 115 3 serial number has been removed altered or made illegible in any way as determ ined at the sole discretio
10. 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 117 GLOSSARY Air time Altitude dive Ascent rate ASC RATE Ascent time ASC TIME Ceiling Ceiling zone Central nervous system toxicity CNS CNS Compartment DAN DCI 118 The amount of dive time remaining based on a calculation of cylinder pressure and ambient pressure and present air consumption 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 decom pression stop dive Abbreviation for ascent time Ona decompression stop dive the shallowest depth to which a diver may ascend based on computed nitrogen load On a decompression stop dive the zone between the ceiling and the ceiling plus 1 8 m 6 ft This depth range is displayed with two arrows pointing toward each other the hour glass icon 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 decompres
11. labeled OLF 79 7 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 fly 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 and so on If you start a new dive with less than five 5 minutes of surface interval time the dive computer interprets this as a continuation of the previous dive and the dives are con sidered to be the same The diving display will return the dive number will remain unchanged and the dive time will begin where it left off After five 5 minutes on the surface subsequent dives are by definition repetitive The dive counter displayed in the Planning mode will increment to the next number if another dive is made 7 3 Flying after diving In the DIVE mode the no fly time is displayed in the center window next to the airplane image In the TIME mode the airplane image is shown in the top left corner Flying or traveling to a higher altitude should be avoided at any time when the computer is counting down the no fly time NOTE The airplane symbol is not shown on the stand by display You should always activate the dive computer and check that the air plane symbol is not displayed prior to flying The no fly time is always at least 12 hours or equivalent to the so called desaturation time if
12. longer than 12 hours In the Permanent Error mode and GAUGE mode the no fly time is 48 hours The Divers Alert Network DAN recommends the following on no fly times 80 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 ex tended interval beyond 12 hours before a flight Further the Undersea and Hyper baric Medical Society UHMS suggests divers using standard air cylinders and exhibiting no symptoms of decompression illness wait 24 hours after their last dive to fly in an aircraft with cabin pressure up to 2 400 m 8 000 ft The only two excep tions to this recommendation are e Ifa diver has less than two 2 hours total accumulated dive time in the last 48 hours a 12 hour surface interval before flying is recommended e 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 as well as the dive computer s no fly conditions are satisfied 7 4 Memories and Data Transfer 1 MEMORY The memory options for this dive computer include the combined Logbook and
13. match the altitude or personal conditions refer to Section 5 8 4 Diving at altitude and Section 5 8 5 Personal adjust ments it is imperative that you enter the correct selection before diving Use Altitude Adjustment to select the correct altitude and use Personal Adjustment to add an extra level of conservatism To enter the Altitude Adjustment and Personal Adjustment Setting mode select MODE 3 SET 1 SET DIVE 1 AdJ MODE Now you are able to select from the three altitude modes and the three personal modes Figure 5 1 Setting Altitude adjustment and Personal adjustment Press the scroll buttons to change the altitude mode 39 5 7 2 Setting the dive time alarm 2 d ALARM The Dive Time Alarm setting 2 d ALARM can be activated and used for several pur poses to add to your diving safety To enter the Dive Time Alarm Setting mode select MODE 3 SET 1 SET DIVE 2 d ALARM Figure 5 2 Setting Dive Time Alarm Press scroll buttons to change alarm on off and to set dive time value Z NOTE With a range of 1 999 minutes the alarm can be set to your planned bottom time for example 5 7 3 Setting the maximum depth alarm 3 MAXDPTH The depth alarm is set to 40 m 131 ft at the factory but you are able to adjust it ac cording 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 40 To enter the Maximum Depth Alarm Setting select MODE 3 SET 1 SET DIVE 3 MA
14. min is exceeded Ascent rate bar graph blinks and STOP warning appears The Mandatory Safety Stop ceiling is exceeded A downward pointing arrow appears Decompression ceiling depth is exceeded An error warning Er and a downward pointing arrow appear You should immediately descend to or below the ceiling The instrument will otherwise enter a perman ent Error mode within three minutes indicated by a permanent Er Table 5 2 Preset alarm types Alarm type Alarm reason Continuous beep series for 24 seconds Preset maximum depth has Maximum depth blinks as long as the current depth been exceeded value exceeds the preset value button is pressed Continuous beep series for 24 seconds or until any Preset dive time has been ex Dive time blinks for one minute if no button is pressed ceeded 34 Alarm type Alarm reason button is pressed pressed Continuous beep series for 24 seconds or until any Preset alarm time is reached Current time blinks for one minute if no button is Table 5 3 Oxygen alarms in NITROX mode Alarm type Alarm reason Three double beeps and the backlight for five 5 seconds The OLF bar graph reaches 80 The segments ex ceeding the 80 limit start to blink The OLF bar graph reaches 100 The OLF value will blink The blinking of the segments exceeding 80 will stop when the OLF is not loading anymore At that point the P
15. repetitive dives H NOTE This display is only shown for repetitive dives NOTE The Dive Planning Simulator mode is disabled in Gauge mode and in Error mode 95 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 A WARNING The built in depth sensor is a sophisticated precision component Keep the area around the depth sensor clear from dirt sand dust or other substances Rinse the device thoroughly with fresh water and dry it with a soft towel Never use pins needles or other ob jects to clean the depth sensor e 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 day s diving is completed The contacts can be cleaned with fresh water and if necessary a mild deterg
16. the back of the user s guide to help you understand dive specific terminology 7 2 WARNINGS CAUTIONS AND NOTES Throughout this user s guide important safety icons are displayed Three classifications are used to separate these icons by their order of importance A WARNING Z 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 device is used to emphasize important information Before you go on to read the user s guide itself it is extremely important that you read the following warnings These warnings are intended to maximize your safety while using Suunto Cobra and must not be ignored WARNING WARNING YOU MUST READ the leaflet and user guide for your dive com puter Failure to do so may lead to improper use serious injury or death ALLERGIC REACTIONS OR SKIN IRRITATIONS MAY OCCUR WHEN PRODUCT IS IN CONTACT WITH SKIN EVEN THOUGH OUR PRODUCTS COMPLY WITH INDUSTRY STANDARDS IN SUCH EVENT STOP USE IMMEDIATELY AND CONSULT A DOCTOR WARNING WARNING 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 condi tions that tend to increase the risk of decompression illness DCI Therefore Suunto strongly recommends that the device not be
17. the Remaining air time 54 Figure 6 2 Diving display Present depth is 19 3 m 63 ft and nodecompression stop time limit is 23 minutes in AO P1 mode Maximum depth during this dive was 19 8 m 65 ft elapsed dive time is 16 minutes Alternative displays by pressing the TIME button show e the water temperature in C F e the current time shown as TIME 55 Figure 6 3 Diving display Present cylinder pressure is 210 bar 3045 psi and remaining air time 41 minutes Alternative display of current time and temperature is shown for 5 seconds after pressing TIME button NOTE In Dive Mode the TIME TEMPERATURE display automatic ally changes back to DIVE TIME CYLINDER PRESSURE after five 5 seconds 6 1 2 Bookmark It is possible to make special marks in the profile memory during a dive These Bookmarks will be shown as a dive log symbol when scrolling the profi le memory on the computer display The Bookmarks will also be shown as annotations in the PC software Suunto Dive Manager To make a bookmark on the profile memory during a dive press the PLAN button 56 Figure 6 4 Bookmark activation An annotation Bookmark is placed in the profile memory during a dive by pressing PLAN button Note Logbook symbol 6 1 3 Cylinder pressure data The pressure of your scuba cylinder in bars or psi is shown digitally in the lower left corner of the alternative display Whenever you start a dive the remaining air time c
18. the timekeeping display if the display is blank e Activates the Time display s and or alternative display s Scrolls down the options Wdecreases values The dive computer is controlled with the SMART MODE On Backlight Select OK Quit and the PLAN A and TIME Y push buttons and with the water contacts as follows Activation Press the SMART On button or immerse the instrument in water for five 5 seconds Dive Planning In the Surface mode press the PLAN button Menu modes Press the SMART MODE button The display is illuminated by holding down the SMART button for more than two seconds 19 4 GETTING STARTED To get the most out of your Suunto Cobra use some time to personalize it and really make it YOUR computer Set the correct time and date the alarms as well as the unit and backlight settings The main menu based functions are grouped under 1 memory 2 dive simulation and 3 setting modes User options for the Cobra are selected by using the push but tons Pre Dive configuration and setup options include e Choice of operating mode Air Nitrox Gauge Choice of unit Metric Imperial Maximum depth alarm Dive time alarm Backlight settings Clock calendar daily alarm Mix Oxygen fraction Nitrox mode only Maximum PO2 Nitrox mode only Altitude adjustment Personal adjustment These options are introduced in more detail in Section 4 1 SET MODES 3 SET THE LIST OF THE MENU BASED MODES 1 MEMORIES AN
19. used for any commercial or professional diving activities ONLY DIVERS TRAINED IN PROPER USE OF SCUBA DIVING EQUIPMENT SHOULD USE A DIVE COMPUTER No dive computer can replace the need for proper dive training Insufficient or improper training may cause a diver to commit errors that may lead to serious injury or death THERE IS ALWAYS A RISK OF DECOMPRESSION ILLNESS DCI FOR ANY DIVE PROFILE EVEN IF YOU FOLLOW THE DIVE PLAN PRESCRIBED BY DIVE TABLES OR A DIVE COMPUTER NO PROCEDURE DIVE COMPUTER OR DIVE TABLE WILL PREVENT THE POSSIBILITY OF DCI OR OXYGEN TOXICITY An individual s physiological make up can vary from day to day The dive computer cannot account for these variations You are strongly advised to remain well within the exposure limits provided by the instrument to minimize the risk of DCI As an added measure of safety you should consult a physician regarding your fitness before diving WARNING WARNING WARNING 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 O AND A MAXIMUM PO OF 1 4 BAR Exposure to greater depths increases the risk of oxygen toxicity and decom pression illness DIVES WITH REQUIRED DECOMPRESSION STOPS ARE NOT RECOMMENDED YOU SHOULD ASCEND AND BEGIN DE COMPRESSION IMMEDIATELY WHEN THE DIVE COMPUTER SHOWS YOU THAT A DECOMPRESSION STOP IS REQUIRED Note the blinking ASC TIME symbol
20. 9 Half time HP 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 120 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 Abbreviation for high pressure cylinder 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 as cent Any dive which permits a direct uninterrupted ascent to the surface at any time 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 0 Oxygen partial pressure POs RGBM Reduced Gradient Bubble Model Repetitive dive
21. COBRA USER S GUIDE en Maximum Depth Ceiling Depth on Decompression Stop Mandatory Safety Stop Depth Average Depth in Logbook Oxygen Partial Pressure AMIPM Indicator Safety Stop Warning Safety Stop Indicator Fast Ascent Warning SLOW Bar Graph Ascent Rate Indicator Battery Power li Logbook Page Indicator Arrows Decompression Stop at the Ceiling Depth y Mandatory Safety Stop Zone A Ascent Recommended A Must Descend Y Present Depth Dive Counter Bookmark Symbol Diver Attention Symbol Mode ina Mode Indicator i Current Time Display Consumed Bottom Time Surface Interval Time Oxygen Limit Fraction No Flying Time No Decompression Time Total Ascent Time Do Not Fly Icon Safety Stop Time Remaining Air Time Oxygen Percentage in Nitrox Mode The Smart Button j Activation Altitude Adjustment Mode e Backlight NA Mode Operations Personal Adjustment Mode pi Ay ANEA AAS Smart Button Si Y Indicators i OPTIONS PF Cylinder Pressure gt a Temperature w Low Battery Waring eck Day Dive Time x Time Month Day Daily DiveTime Depth Alarm Scroll Button On indicator Indicators Plan Button Time alternative display Button Scroll Button increase value ascend Scroll Button decrease value descend piny a uaaagay 21ND 1 WELCOME TO THE WORLD OF SUUNTO DIVE COMPUTERS 7 2 WA
22. D DATA TRANSFER 1 MEMORY Logbook and Dive Profile Memory 1 LOGBOOK Dive History Memory 2 HISTORY Data Transfer and PC Interface 3 TR PC 2 SIMULATION MODE 2 SIMUL 20 Dive Simulator 1 SIMDIVE e Dive Planning Simulator 2 SIMPLAN 3 SET MODES 3 SET Dive Parameter Settings 1 SETDIVE Altitude Adjustment and Personal Adjustment Settings 1 AdJ MODE e Dive Time Alarm Setting 2 d ALARM e Maximum Depth Alarm Setting 3 MAX DPTH e Nitrox Oxygen Settings 4 NITROX Setting Time 2 SET TIME e Adjusting Time 1 AdJ TIME e Adjusting Date 2 AdJ DATE e Adjusting Daily Alarm 3 T ALARM e Setting Preferences 3 SET PREF e Backlight Setting 1 LIGHT e Dive Computer Units Setting Metric Imperial 2 UNITS Dive Computer Model Settings Air Nitrox Gauge 3 MODEL NOTE The menu based modes cannot be activated until 5 minutes after the dive Memories and Data Transfer modes and Simulation Modes are introduced in Section 7 4 Memories and Data Transfer 1 MEMORY and Section 7 6 Simulation Mode SIMUL Dive parameter settings are introduced in Section 5 7 DIVE mode settings 21 THE USE OF THE MENU BASED FUNCTIONS 1 Activate the menu based modes by pressing once the SMART MODE button in the Dive Mode Figure 4 1 Main menu based Mode options 3 MODE 2 Scroll the mode options by pressing the arrow up down buttons When scrolling the options the label and an equivalent number are show
23. Dive Profile Memory Dive History Memory and the Data Transfer and PC Interface functions The dive entry time and date is registered in the Logbook memory Always check before diving that the time and date are correctly set especially after travelling between dif ferent time zones 81 Figure 7 3 Memory options 3 MEMORY 7 4 1 Logbook and Dive Profile Memory 1 LOGBOOK The Suunto Cobra has a very sophisticated high capacity Logbook and Profile Memory The data is recorded in the profile memory based on the selected sample rate Dives shorter than the recording interval are not registered To enter the Logbook Memory Mode select MODE 1 MEMORY 1 LOGBOOK For each dive there are four pages of logbook dive information Use the scroll buttons to scroll the display between Logbook pages II IH and IV The data of the most recent dive is shown first The logbook dives can be scrolled through displaying only the first page of each dive or scrolling through the 4 different pages of a dive When at the first page of a dive use the MODE button to change the scroll sequence When the arrow icon is next to the Mode button the scroll button will scroll through the fi rst page only of each dive 82 When Select is displayed next to the mode button the scroll buttons will scroll through the four pages of the selected dive The END text is displayed between the oldest and most recent dive Note that chronological sequence in the logb
24. Diver Attention symbol Diver Attention Symbol Advice to Extend Surface Interval Some patterns of diving cumulatively add a higher risk of DCI for example dives with short surface intervals repetitive dives deeper than earlier ones multiple ascents and substantial multiday diving When this is detected in addition to adapting the de compression algorithm the Suunto RGBM model will in some circumstances also advise with the Diver Attention Symbol that you extend your surface interval 107 10 2 2 No decompression limits for air 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 No decompression time limits for various depths m No decompression time limits mins for various depths m for the first dive of a series Depth Personal Mode Altitude Mode m PO AO PO A1 PO A2 P1 A0 P1 A1 P1 A2 P2 A0 P2 A1 P2 A2 9 205 148 97 181 133 86 160 120 76 12 124 77 54 108 69 50 93 63 46 15 71 51 34 65 47 31 59 42 29 18 51 34 24 47 32 22 43 29 20 21 37 26 17 34 24 15 31 21 13 24 29 19 11 27 17 10 25 16 9 27 22 13 8 20 12 7 19 11 7 30 17 10 6 16 9 5 14 9 5 33 13 8 4 12 7 4 11 6 4 108 No decom
25. O2 is less than 0 5 bar Continuous beeps for three 3 minutes and activated back light for five 5 seconds Set oxygen partial pressure limit is exceeded The al ternative display is replaced with a current blinking PO value You should immediately ascend above the PO depth limit ZA NOTE When the backlight is turned OFF it does not illuminate when an alarm is activated 35 A 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 5 Error conditions The dive computer has warning indicators that alert you to react to certain situations that would significantly increase the risk of DCI If you do not respond to its warnings the dive computer will enter an Error mode indicating that the risk of DCI has greatly increased If you understand the dive computer and operate it sensibly it is very unlikely you will ever put the instrument into the Error mode Omitted decompression The Error mode results from omitted decompression for example 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 enters a permanent Error mode The instrument will continue to function no
26. RNINGS CAUTIONS AND NOTES 00 ceeeeeeeeeee eee eee eee eeeeneeas 8 3 SUUNTO USER INTERFACE wis Haag ees gnana a a EAA TAEAE E a 17 3 1 Navigating in the menus ccc cece eee eee eee eee e ee eaee eee 17 3 2 Button symbols and functions c cece cece eee eee eee e eee eeee eens 18 4 GETTING STARTED siei forrni cece eeee cece nee einar Doi e eee Nenei a oa EEE a Eanna 20 4 1 SET MODES S SET erra arara AT AAE A ANLA AEA a 24 4 1 1 Setting Time 2 SET TIME i rrr nirera e iaaa RiT 25 4 1 2 Setting Preferences 3 SET PREF ccceeeeeeeeeeeeeees 27 4 2 AG water contacts maie enans enp aaa a Mah aA aE 29 5 BEFORE DIVING uein one torea EEE E Ea E dae ae ONENE ET DN 31 5 1 The Suunto RGBM saiia aeaea nena aaa i aE MARNE ead 31 5 2 Emergency ascet iina aee eia a nana EAE ee aden DEEN E edad ead 32 5 3 Dive computer limitations 0 0 ccc cece e eee eee ee eee ee ee eeee eee 32 5 4 Audible and visual alarms cece cece eee eee eee eee 33 5 3 Error CONCIUONS Stes na a a o Aa aaya delat e A anita a harden 36 9 6 Air integration eeren ninaona paa te ek a pase EEEE ATON EEE AR 37 5 6 1 Connecting Suunto Cobra to a regulator cceeeeeeeee ees 37 5 7 DIVE mode Settings i e aa eeu Ea Ob cin ie tip pa EEK ela ee etn 38 5 7 1 Setting the personal altitude adjustments 1 AdJ MODE 39 5 7 2 Setting the dive time alarm 2 d
27. Residual nitrogen SURF TIME Surface interval time Tissue group Whole body toxicity 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 nitro gen 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 irrita tion in the lungs a burning sensation in the chest coughing and reduction of the vital capacity Also called Pulmonary Oxygen Toxicity See also OTU 121
28. URFACE display 77 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 diver attention symbol indicates that you should prolong your surface interval time 78 maximum depth of last dive in meters feet dive time of last dive in minutes shown as DIVE TIME present depth in meters feet no flying warning indicated by an airplane icon Altitude Adjustment setting Personal Adjustment setting Diver attention symbol indicates if you should prolong your surface interval time STOP label for 5 min if the Mandatory Safety Stop was violated Er if the decompression ceiling was violated Error Mode Cylinder pressure in bars psi Figure 7 2 Surface interval the surface time and no flying time displays Pressing the TIME button once the surface time display is shown and by pressing the TIME button twice the no flying time display is shown indicated by the airplane symbol Or when the TIME button is pressed once or twice the current time shown as TIME the current temperature in C F e the surface time in hours and minutes separated by a colon telling the duration of the present surface interval the desaturation no flying time in hours and minutes is shown next to the airplane in the center window of the display If set to NITROX mode the following information will also be shown e the oxygen percentage labeled O2 e the current oxygen toxicity exposure
29. WARNING WARNING NOTE Always use realistic SAC rates and conservative turn pressures during dive planning Overly optimistic or erroneous gas planning can result in the exhaustion of breathing gas during decompres sion or in a cave or a wreck ENSURE THE WATER RESISTANCE OF THE DEVICE Moisture inside the device or battery compartment will seriously damage the unit Only an authorized SUUNTO dealer or distributor should do service activities It is not possible to change between AIR NITROX and GAUGE modes before the instrument has counted down the no fly time There is one exception to this You can change from AIR to NI TROX mode even during the no fly time In GAUGE mode the no fly time is always 48 hours 3 SUUNTO USER INTERFACE 3 1 Navigating in the menus Suunto Cobra multipurpose dive computer features three dive computer modes AIR NITROX GAUGE three main operating modes TIME STAND BY SURFACE DIVING three menu based main modes MEMORY SIMULATION SET and 16 18 menu based submodes You can scroll through the modes using the push buttons The mode indicator at the left side and the mode text at the bottom of the display in dicate the selected mode The timekeeping display is the primary display of the instrument In other modes except in the Diving or Simulator modes if no button is operated within 5 minutes the dive computer beeps and returns to the timekeeping display automatically The timekeeping disp
30. XDPTH Figure 5 3 Setting Maximum Depth Alarm Press scroll buttons to change alarm on off and to set maximum depth value 5 7 4 Setting the nitrox values 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 addition the oxygen partial pressure limit must be set When in the NITROX setting mode the maximum operating depth MOD based on the chosen setting will also be displayed To enter the Nitrox Oxygen Setting mode select MODE 3 SET 1 SET DIVE 4 NI TROX The default oxygen percentage 05 setting is 21 air and oxygen partial pressure PO setting 1 4 bar 41 Figure 5 4 Setting Oxygen Percentage and Partial Pressure The equivalent maximum depth is displayed as 32 8 m 107 ft Press scroll buttons to change oxygen percentage and to set oxygen partial setting value 5 8 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 8 1 Accessing DIVE mode The Suunto Cobra 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 42 5 8 2 DIVE mode activation The dive computer activates automatically when submerged deeper than 0 5 m 1 5 ft How
31. alculation begins After 30 60 seconds sometimes more depending on your air consumption the first estimation of remaining air time will be shown in the left center window of the display The calculation is always based on the actual pressure drop in your cylinder and will automatically adapt to your cylinder size and current air con sumption The change in your air consumption is based on constant one second interval pressure measurements over 30 60 second periods An increase in air consumption influences the remaining air time rapidly while a drop in air consumption increases the air time slowly In this way an over optimistic air time estimation caused by a temporary drop in air consumption is avoided 57 The remaining air time calculation includes a 35 bar 500 psi safety reserve This means that when the instrument shows the air time to be zero there is still about 35 bar 500 psi of pressure left in your cylinder depending on your air consumption rate With a high consumption rate the limit will be closer to 50 bar 700 psi and with a low rate closer to 35 bar 500 psi NOTE Filling your BC affects the air time calculation due to the temporary increase in air consumption BA NOTE A change of temperature will affect the cylinder pressure and consequently the air time calculation Low Air Pressure Warnings The dive computer will warn you with three 3 audible double beeps and a blinking pressure display when the cylinder pres
32. and the upward pointing ar row USE BACK UP INSTRUMENTS Ensure that you use back up instrumentation including a depth gauge submersible pressure gauge timer or watch and have access to decompression tables whenever diving with the dive computer PERFORM PRE CHECKS Always activate and check the device before diving in order to ensure that all Liquid Crystal Display LCD segments are completely displayed the device has not run out of battery power and that the oxygen altitude personal and Safety Deep Stop are correct WARNING A WARNING YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COM PUTER COUNTS DOWN THE NO FLY TIME ALWAYS ACTIV ATE THE COMPUTER TO CHECK THE REMAINING NO FLY TIME PRIOR TO FLYING Flying or traveling to a higher altitude within the no fly time can greatly increase the risk of DCI Review the recommendations given by Divers Alert Network DAN There can never be a flying after diving rule that is guaranteed to com pletely prevent decompression illness 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 sub sequent dives No dive computer can take into account dives made without the computer Thus an
33. ascent rate excess The STOP sign is shown in the display and when you reach the depth zone between 6 mand 3 m 20 ft and 10 ft the CEILING label ceiling depth and the calculated Safety Stop time also appear in the display Wait until the Mandatory Safety Stop warning disappears The total length of the Mandatory Safety Stop time depends on the seri ousness of the ascent rate violation Figure 5 9 A Mandatory Safety Stop You are advised to make a Mandatory Safety Stop in the depth zone between 6 m and 3 m 20 ft and 10 ft Press the TIME button to view the alternative display 51 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 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 52 6 DIVING This section contains instructions on how to operate the dive computer and interpret its displays The dive computer is easy to use and r
34. ater contacts are used only for the data transfer The Dive Mode IS NOT auto matically activated if the contacts are submerged 7 5 Movescount Movescount is an online sports community that offers you a rich set of tools to manage all you sports and create engaging stories about your diving experiences Movescount offers you new ways to get inspired and share your best dives with other community members To connect to Movescount 1 Go to www movescount com 2 Register and create your free Movescount account 91 3 Download and install the Suunto DM4 with Movescount software from the Movescount com website if you do not already have the DM4 installed on your laptop To transfer data 1 Connect your dive computer to your laptop 2 Download your dives to the DM4 on your laptop 3 Follow the instructions on the DM4 on how to transfer your dives to your Movescount com account 7 6 Simulation Mode SIMUL The Simulation mode can be used to acquaint yourself with the features and displays of the instrument before diving to plan dives in advance for demonstration or education purposes or just for pleasure The dive computer has two simulation modes e The DIVE SIMULATOR e The DIVE PLANNING SIMULATOR 92 Figure 7 11 Dive Simulation options 2 SIMUL In Simulation Mode time moves four times faster than real time when diving for example 15 s 1 min 7 6 1 Dive Simulator 1 SIMDIVE The Dive Simulator mode is an e
35. ation of the Dive Mode The water and data transfer contacts are located on bottom of the case When sub merged the water contacts are connected to the push buttons which are the other pole of the water contact by the conductivity of the water The AC text will appear on display The AC text will be shown until the water contact deactivates or the dive computer enters the Dive Mode automatically 29 Figure 4 10 Depth sensor A water data transfer contacts B 30 5 BEFORE DIVING Do not attempt to use the dive computer without reading this user s guide in its entirety including all the warnings Make sure that you fully understand the use displays and limitations of the instrument If you have any questions about the manual or the dive computer contact your SUUNTO dealer before diving with the dive computer Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY When used properly Suunto Cobra is an outstanding tool for assisting properly trained certified divers in planning and executing Itis NOT ASUBSTITUTE FOR CERTIFIED SCUBA INSTRUCTION including training in the principles of decompression WARNING Diving with gas mixtures exposes you to risks that are different from those associated with diving with standard air These risks are not obvious and require training to understand and avoid Risks include possible serious injury or death Do not attempt to dive with any gas mix other than standard air withou
36. ay range 9 to 50 C 9 to 122 F e Accuracy 2 C 3 6 F within 20 minutes of temperature change Calendar clock e Accuracy 25 s month at 20 C 68 F e 12 24 h display Displays only in NITROX mode Oxygen 21 50 e Oxygen partial pressure display 1 2 1 6 bar e Oxygen Limit Fraction 1 110 with 10 resolution bar graph Logbook dive profile memory e Recording interval 20 seconds adjustable 10 20 30 60 s Memory capacity approximately 36 hours of diving with 20 second recording interval Depth resolution 0 3 m 1 ft Operating conditions e Normal altitude range 0 to 3 000 m 10 000 ft above sea level Operating temperature 0 C to 40 C 32 F to 104 F e Storage temperature 20 C to 50 C 4 F to 122 F It is recommended that the instrument be stored in a dry place at room temperature ZA NOTE Do not leave the dive computer in direct sunlight 104 Tissue calculation model Suunto 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 Hamilton PhD and currently accepted exposure time limit tables and p
37. bol as a warning when the power gets too low When this happens the instrument should not be used until the battery has been replaced Periodically check the hose for cracks or other signs of deterioration Replace hose if any damage is found 97 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 for possible moisture or water DO NOT use the dive computer if you detect any moisture or water inside Contact an au thorized 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 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 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 tak
38. cent rate indicator cece eee 60 6 1 6 Decompression dives 00 ccecceee eect eee eee eee eee eee eaeeeeeaee 62 6 2 Diving in NITROX mode asessorin ioaea S aa ara ETENI NEENA ANHEE SNA EA 69 6 2 1 Before diving in the NITROX mode 00cceeeeee ee eeee ee eee ee 70 6 2 2 OXygen diS l y S a e santa a aa aaa DEEA E TOENGA PEENE AA T EEE NEAN 71 6 2 3 Oxygen limit fraction OLF 0 eects 73 6 3 Diving in the GAUGE mode 0c cece cece cence ee tenet ee eneeeeenaeees 75 7 APTER DIVING foc ices Manieren na deters A A Da NE tes Ee 77 7A Surface interval resen ssaeopeessaeentevehenrensen steed hd NANSA tees abe NANA 77 7 2 Dive numbering 0ccce cece cece eee ence eee e eee tenets tenant ee iea Taie 80 7 3 Flying after GIVING serisen ao kentini kanien nre albus lew eel donee 80 7 4 Memories and Data Transfer 1 MEMORY 0eeeeeeeeeeeeeeees 81 7 4 1 Logbook and Dive Profile Memory 1 LOGBOOK 82 7 4 2 Dive history Memory 2 HISTORY c0ceeeeeeeeeeeeeeeeeaees 88 7 4 3 Data Transfer and PC Interface 3 TR PC 0 eeeeeeeeeee ee 90 ED MOVESCOUNT arie civdeed acca aa aaa e aa cade Ries adaa iiaa dahaa yee ens 91 7 6 Simulation Mode SIMUL e cece eee eee e ee eee teeta eeeeeeeeeeenes 92 7 6 1 Dive Simulator 1 SIMDIVE cceceee eee e eect eee eerren reene 93 7 6 2 Dive Planning
39. e 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 Navy Tables are based on theoretical mathematical models which are intended to serve as a guide to reduce the probability of decompression illness 32 5 4 Audible and visual alarms The dive computer has audible and visual alarms that advise when important limits are approached or that prompt you to acknowledge preset alarms The table below describes the different alarms and their meanings The visual information on the dive computer display is shown during the alarm breaks in order to save battery Table 5 1 Audible and visual alarm types Alarm type Alarm reason Short single beep Dive computer is activated Dive computer automatically returns to the TIME mode Three double beeps Cylinder pressure reaches 50 bar 725 psi The cylinder pressure display will start to blink Cylinder pressure reaches 35 bar 500 psi Calculated remaining air time reaches zero Three single beeps with a two No decompression dive turns into a decompression second interval and activated stop dive An arrow pointing upwards and the blinking backlight for five 5 seconds ascent warning ASC TIME appears 33 Alarm type Alarm reason Continuous beeps and activ ated backlight for five 5 seconds Maximum allowed ascent rate 10 m per min 33 ft per
40. e the dive computer to an authorized SUUNTO dealer or distributor FAQs For more information on service please refer to FAQs on www suunto com 98 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 When the battery is changed all nitrogen and oxygen uptake data is lost Therefore the no fly time shown by the computer should have reached zero or you must wait for 48 hours or preferably up to 100 hours before you dive again When working with the battery compartment cleanliness is extremely important Even the smallest dirt particles may cause a leakage when you dive 9 1 Battery kit The battery kit includes a 3 0 V coin type lithium cell battery and a lubricated O ring When handling the battery do not make contact with both of the poles at the same time Do not touch the surfaces of the battery with your bare fingers 9 2 Required tools A Phillips head screwdriver Soft cloth for cleaning e Needlenose pliers or small screwdriver for turning securing ring 99 9 3 Replacing the battery The battery and the buzzer are located in the back of the instrument in a separate compartment To change the battery 1 Unscrew the four screws at the back of the elastomer console and remove the back cover of the cons
41. ead Each display shows only the data relevant to that specific diving mode 6 1 Diving in AIR mode This section contains information on diving with standard air To activate the DIVE Air mode please refer to Section 5 8 1 Accessing DIVE mode air time will be shown after 30 60 seconds 53 B NOTE 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 instru ment will go into the DIVE mode automatically However it is re commended 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 e the Altitude Adjustment setting on the left side of the center window with a wave and mountain symbols AO A1 or A2 see Table 5 4 Altitude Adjustment settings e the Personal Adjustment setting on the left side of the center window with a diver symbol and signs PO P1 or P2 see Table 5 5 Personal Adjustment settings e the maximum depth during this dive in meters ft indicated as MAX e the cylinder pressure in bar psi displayed in the lower left corner e the elapsed dive time in minutes shown as DIVE TIME in the lower right corner e the available no decompression time in minutes in the center window as NO DEC TIME and as a bar graph on the left side of the display e
42. eck the polarity of the battery the mark should point toward the bottom of the compartment and the mark upwards Gently insert the new battery in the battery compartment Reinstall the battery retainer in its correct position 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 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 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 Turn the locking ring counterclockwise with your free thumb and fingers until it snaps into its locked position The dive computer should now active its timekeeping mode and show time 18 00 6 00 PM and date SA 01 01 Activate the instrument Check that e all display segments work e the low battery warning is off e the buzzer beeps and backlight works e all the settings are correct Reset if necessary Reassemble computer into the console The instrument is now ready for use CAUTION Check after the first dives for possible moisture under the trans parent battery compartment lid indicating a leak 101 9 4 DISPLAY SHIELD REPLACEMENT Unscrew the four screws at the back of the console and
43. eeded to reach the surface in a decompression dive It includes e the three 3 minute Recommended Safety Stop e the time needed to ascend to the ceiling at an ascent rate of 10 m 33 ft per minute The ceiling is the shallowest depth to which you should ascend e the time needed at the ceiling the time needed at the Mandatory Safety Stop if any the time needed to reach the surface after the ceiling and Safety Stops have been completed WARNING YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DIS PLAYED BY THE INSTRUMENT The ascent time will increase if you remain at depth e ascend slower than 10 m 33 ft per minute or make your decompression stop deeper than at the ceiling These factors will also increase the amount of air required to reach the surface 63 Ceiling ceiling zone floor and decompression range When in decompression it is important that you understand the meaning of ceiling floor and decompression range e The ceiling is the shallowest depth to which you should ascend when in decom pression At this depth or below you must perform all stops e The ceiling zone is the optimum decompression stop zone It is the zone between the minimum ceiling and 1 4m 6 ft below the minimum ceiling The floor is the deepest depth at which the decompression stop time will not in crease Decompression will start when you pass this depth during your ascent e The decompression range is the depth range between the ceili
44. ent and a soft brush Sometimes it might be necessary to remove the instrument from the protective boot for cleaning e CARE OF YOUR DIVE COMPUTER e NEVER try to open the case of the dive computer 96 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 service Do not at tempt to do any servicing that you are not sure of 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 The dive computer cannot withstand the impact of heavy objects like scuba cylinders nor chemicals like gasoline cleaning solvents aerosol sprays adhes ive agents paint acetone alcohol and so on 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 sym
45. ever it is necessary to activate the DIVE mode BEFORE diving to check the cylinder pressure altitude and personal adjustment settings battery condi tion oxygen settings and so on Press the SMART On button to activate the in strument Figure 5 5 Startup All segments shown After activation all display elements will turn on showing mostly figure 8 s and graph ical elements A few seconds later the battery power indicator is shown and the backlight and the buzzer are activated If set to Air mode the screen will enter the Surface mode If set to Gauge mode the text GAUGE is shown and if set to Nitrox mode the essential oxygen parameters are shown with the text NITROX before the Surface mode 43 At this time perform your pre checks and ensure that e the instrument operates in the correct mode and provides a complete display AIR NITROX GAUGE mode e the low battery indicator is not on e the altitude and personal adjustment settings are correct e the instrument displays correct units of measurement Metric Imperial e the instrument displays the correct temperature and depth 0 0 m O ft e the alarm beeps e the buzzer beeps e you have enough air for your planned dive You should also check the pressure reading against your back up pressure gauge 44 And if set to NITROX mode ensure that e the correct number of mixes is set and that the oxygen percentages are adjusted according to the measured en
46. he NITROX mode the maximum operational depth is calculated based on set O2 and PO values If set to the NITROX mode the Suunto will additionally show on the alternative display e the oxygen percentage labeled O2 e the set oxygen partial pressure limit labeled PO e the current oxygen toxicity exposure labeled OLF maximum depthallowed based on the set oxygen percentage and partial pressure limit J Figure 6 13 Nitrox display Maximum depth based on set 02 21 and PO2 1 4 bar is 54 1 m 177 ft 71 In the Dive modes the oxygen percentage labeled with O2 and the current oxygen toxicity exposure shown with an Oxygen Limit Fraction OLF bar graph are shown Fig 3 22 and Fig 3 23 The O2 is shown until the remaining air time is less than 30 minutes After this the remaining air time is displayed in its place During a dive the oxygen partial pressure labeled with POs is also shown instead of the maximum depth in the upper right display if the partial pressure is greater than 1 4 bar or the set value oxygen partial pressure is greater than 1 4 bar or set value and or the OLF has reached 80 limit By pressing the TIME button during a nitrox dive the alternative display appears which includes current time temperature Consumed Bottom Time 72 maximum depth during decompression stop dive e Oxygen percentage when remaining air time is less than 30 min JL MODESTINE j G28
47. ing a Safety Stop in clude reducing sub clinical DCI microbubble reduction ascent control and orientation before surfacing The Suunto Cobra displays two different types of Safety Stops Recommended Safety Stop and Mandatory Safety Stop The Safety Stops are indicated by e STOP label when in the depth range 3 6 m 10 20 ft Recommended Safety Stop Countdown 49 e STOP CEILING label when in the depth range 3 6 m 10 20 ft Mandatory Safety Stop Time display e STOP label when deeper than 6 m Mandatory Safety Stop scheduled 5 9 1 Recommended Safety Stops With every dive over 10 meters there is a three minute countdown for the Recommen ded Safety Stop to be taken in the 3 6 m 10 20 ft range This is shown with the STOP sign and a three minute countdown in the center window instead of the no decompres sion time Figure 5 8 Ascent rate indicator Two segments 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 50 5 9 2 Mandatory Safety Stops When the ascent rate exceeds 10 m 33 ft per minute continuously for more than five 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
48. is recorded and displayed in 20 second increments with each display being shown for about three seconds The depths shown are the maximum values of each interval Pressing any button stops the scrolling of the profile 7 4 2 Dive history Memory 2 HISTORY The dive history is a summary of all the dives recorded by the dive computer To enter the Dive History Memory mode select MODE 1 MEMORY 2 HISTORY Figure 7 9 Dive History Memory Mode 2 HISTORY The following information will be shown on the display 88 Figure 7 10 Dive History information Total number of dives dive hours and maximum depth The Dive History Memory can hold a maximum of 999 dives and 999 diving hours When these maximum values are reached the counters will start again from zero NOTE The maximum depth can be reset to 0 0 m 0 ft using the PC Inter face unit and the downloadable Suunto Dive Manager software 89 7 4 3 Data Transfer and PC Interface 3 TR PC The Suunto DM4 with Movescount DM4 is an optional software that greatly enhances the functionality of your Suunto Cobra With the DM4 software you can download dive data from your dive computer to your laptop After that you can view and organize all the data recorded with your Suunto Cobra You can plan dives with Suunto Dive Planner print copies of your dive profiles and also upload your dive logs to share with your friends at http www movescount com see Section 7 5 Movescount Yo
49. l diving and you plan to use Gauge mode on a regular basis it may be preferable to set the instrument permanently to its Gauge mode If set to Gauge mode the text GAUGE is shown after activation In the Gauge mode the present depth maximum depth dive time cylinder pressure remaining air time and ascent rate indicator are displayed during the dive In addition temperature and current time are shown in the alternative display Figure 6 17 The Gauge mode The present depth maximum depth dive time cylinder pressure remaining air time and ascent rate indicator are displayed during the dive This mode can also be used for other purposes like snorkeling free diving depth measurements and so on NOTE The mode does not provide decompression information 75 B NOTE If you dive with the GAUGE mode it is not possible to change between the modes before the no fly time has counted down 76 7 AFTER DIVING Once back at the surface Suunto Cobra continues to provide post dive safety inform ation and alarms Calculations to enable repetitive dive planning also help to maximize diver safety Table 7 1 Alarms Symbol on display Indication A Diver Attention Symbol Extend Surface Interval Fe Violated Decompression Ceiling or Too Long Bottom Time NOJ Do Not Fly Symbol 7 1 Surface interval An ascent to any depth shallower than 1 2 m 4 ft will cause the DIVE display to be replaced by the S
50. lay shuts off after two hours but pressing the PLAN or TIME button activates it A Figure 3 1 Time keeping display Press the PLAN or TIME button to activate the display 17 3 2 Button symbols and functions The list below explains the main functions of the dive computer s buttons The buttons and their use is explained in more detail in the relevant sections of the user s guide The dive computer has easy to use push buttons and an advising display which guides the user The SMART MODE button is the key of the system The two scroll buttons PLAN and TIME are used for scrolling up and down the menus and to get the altern ative displays visible The dive computer is controlled with these three push buttons as follows Figure 3 2 Push buttons of the dive computer SMART MODE button e Activates the dive computer e Switches from the Surface mode to menu based modes e Selects confirms or quits a submode short press e Immediately exits any submode to the Surface mode long press e Activates the electroluminescent backlight in the Surface mode hold down the mode button for more than two 2 seconds during a dive for one 1 second PLAN arrow up button e Activates the timekeeping display if the display is blank e Activates the Dive Planning in the Surface mode Makes a special bookmark in the profile memory during a dive e Scrolls up the options A increases values TIME arrow down button e Activates
51. n of Suunto 4 has been exposed to chemicals including but not limited to mosquito repellents Suunto does not warrant that the operation of the Product will be uninterrupted or error free or that the Product will work in combination with any hardware or software provided by a third party Access to Suunto warranty service Register your item at www suunto com register and save the purchase receipt and or registration card For instructions how to obtain warranty service visit www suunto com contact your local authorized Suunto retailer or call Suunto Help Desk 358 2 2841160 national or premium rates may apply 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 Suunto shall not be liable for special incidental punitive or consequential damages including but not limited to loss of anticipated benefits loss of data loss of use cost of capital cost of any substitute equipment or facilities claims of third parties damage to property resulting from the purchase or use of the item or arising from breach of the warranty breach of contract negligence strict tort or any legal or equitable theory even if Suunto knew of the likelihood of such damages Suunto shall not be liable for delay in rendering warranty service 116 14 DISPOSAL OF THE DEVICE Please dispose of the device in an
52. n on the display 22 Figure 4 2 Scroll the mode options by pressing the arrow up down buttons Press the SMART Select button once to select the desired option Scroll the submode options by pressing the arrow up down buttons When scrolling the options the label and an equivalent number are shown on the display Select the desired option by pressing once the SMART Select button Repeat the procedure if there are more submodes Depending on the mode you are now able to have a look at the memories simu late a dive or make desired settings use the the arrow up down buttons The SMART button is used to Quit or to confirm the settings OK Z NOTE If you do not press any of the buttons for 5 minutes while in a Menu based mode the instrument beeps and returns to the timekeeping display In the Simulation Mode however the equivalent time is 60 minutes 23 By pressing the SMART button for more than 1 second any menu based function or submode can be quit and the dive computer will return directly to the Dive Mode 4 1 SET MODES 3 SET The Set Modes include dive configuration and setup options that have to be set before the dive The Set Modes are divided into three submodes for setting the dive related parameters time related parameters and your personal preferences In this section are introduced the time related parameters Setting Time 2 SET TIME and personal preferences Setting Preferences 3 SET PREF The di
53. ng a dive when the computer is set in mode e The selected O2 on the alternative display e OLF alternative display for either CNS or OTU whichever is larger e Audible alarms are given and the OLF value starts to blink when the 80 and 100 limits are exceeded 111 e Audible alarms are given and the actual PO value blinks when it exceeds the preset limit e In dive planning the maximum depth according to the 05 and maximum PO selected e the blinking of the bar graph stops when the PO2 is below 0 5 bar 112 11 INTELLECTUAL PROPERTY 11 1 Trademark Suunto is a registered trademark of Suunto Oy 11 2 Copyright Suunto Oy 08 2011 All rights reserved 11 3 Patent notice Patents have been issued or applied for one or several features of this product 113 12 DISCLAIMERS 12 1 CE The CE mark is used to mark conformity with the European Union EMC directive 89 336 EEC 12 2 EN 13319 EN 13319 is a European diving depth gauge standard Suunto dive computers are designed to comply with this standard 12 3 EN 250 FIOH The tank pressure gauge and dive instrument parts used in measuring the tank pressure meet the requirements set in the section of the European Standard EN 250 that concern tank pressure measurements FIOH notified body no 0430 has EC type examined this type of personal protective equipment 114 13 SUUNTO LIMITED WARRANTY Suunto warrants that during the Warranty Period Suunto or a
54. ng and floor Within this range decompression takes place However it is important to remember that the decompression will be very slow at or close to the floor Vv CEILING y 3m 10ft A 6m 18ft A FLOOR Figure 6 8 Ceiling and Floor zone Recommended and Mandatory Safety Stop zone between 6 m and 3 m 20 ft and 10 ft 64 The depth of the ceiling and floor depends 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 In such cases it is more manageable to maintain an additional distance below the ceiling to ensure that the waves do not lift you above the ceiling Suunto recom mends that decompression takes place deeper than 4 m 13 ft even if the indicated ceiling is shallower NOTE It will take more time and more air to decompress below the ceiling than at the ceiling WARNING NEVER ASCEND ABOVE THE CEILING You must not ascend above the ceiling during your decompression In order to avoid doing so by accident you should stay somewhat below the ceiling Display below the floor The blinking ASC TIME sign and an upward pointing arrow indicate that you are below the floor You should start your ascent immedia
55. nsure correct nitrogen and oxygen calculations The dive computer adjusts its mathematical nitrogen and oxygen calcu lation 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 If you want to adjust the computer to provide more conservative calculations use the personal adjustment feature to affect decom pression calculations or reduce the PO setting to affect oxygen exposure according to the entered O2 and PO values Calculations based on nitrox use result in longer no decompression times and shallower maximum depths than diving with air When the dive computer is set in NITROX mode the Dive Planning mode calculates using the O2 and PO values that are currently in the computer Default nitrox settings In the NITROX mode the default setting is standard air 21 O3 It remains in this setting until the O2 is adjusted to any other percentage of oxygen 22 50 The default setting for maximum oxygen partial pressure is 1 4 bar however you are able to set it in the range of 1 2 1 6 bar If unused the computer will retain the manually entered value for the selected oxygen percentage for about two hours after which it will revert to the default setting of 21 Oo 70 6 2 2 Oxygen displays When the NITROX mode is activated the display will show the information in the figure below In t
56. nt for RGBM effect on repetitive dives for very experienced divers 47 The personal factors which tend to increase the possibility of DCI include but are not limited to e cold exposure water temperature less than 20 C 68 F e below average physical fitness level e fatigue e dehydration e previous history of DCI e stress obesity patent foramen ovale PFO exercise on or after dive This feature is used to adjust the computer to be more conservative according to personal preference by entering the suitable Personal Adjustment setting with the help of Table 5 5 Personal Adjustment settings In ideal conditions retain the default setting PO If conditions are more difficult or any of the factors which tend to increase the possibility of DCI exist select P1 or even the most conservative P2 The dive computer then adjusts its mathematical model according to the entered Personal Ad justment setting giving shorter no decompression times 48 Table 5 5 Personal Adjustment settings Personal ad Sym Condition Desired tables justment bol on value Dis play PO Ideal conditions Default P1 3 Some risk factors or conditions exist Progressively more conservative P2 4 Several risk factors or conditions lexist 5 9 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 perform
57. ole 2 Thoroughly rinse and dry the computer 3 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 and turn the ring clockwise Be careful not to damage any of the parts Remove the ring Carefully remove the lid with the beeper attached to it You can remove the lid by pressing with your finger on the outermost edge of the lid while simultaneously pulling with your nail at the opposite side Don t use sharp metal objects as they might damage the O ring or the sealing surfaces 6 Remove the O ring and the battery retainer 7 Carefully remove the battery Do not damage the electrical contacts or the sealing surface 8 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 9 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 Or 100 10 11 12 13 14 15 16 17 A Check that the battery compartment battery holder and lid are clean Clean with soft cloth if necessary Ch
58. ook is determined by the date not by the dive number The END text is displayed between the oldest and most recent dive The following information will be shown on three pages Figure 7 4 Logbook end of the memory END text is displayed between oldest and the most recent dive Page I main display e date of dive dive start time e dive number 83 Figure 7 5 Logbook page Scroll different pages of specific dive Page II maximum depth ZA NOTE Due to lower resolution the reading may differ from the max imum depth reading of the Dive History up to 0 3 m 1 ft e total dive time e dive number in the dive series e temperature at the maximum depth e Altitude Adjustment setting not displayed in Gauge mode e Personal Adjustment setting not displayed in Gauge mode e SLOW label if the diver has violated the maximum ascent rate e STOP label if the Mandatory Safety Stop was violated e ASC TIME label if the dive was a decompression stop dive e Diver attention symbol if the dive was started while symbol was displayed downward pointing arrow if the ceiling was violated oxygen percentage only in Nitrox mode maximum OLF during the dive only in Nitrox mode Figure 7 6 Logbook page II Main dive related data Page Ill dive number in the dive series average depth surface interval time before the dive AP describing Cylinder pressure drop during the dive 85 Figure 7 7 Logbook page III
59. ory Safety Stop warning on Figure 6 6 Ascent Rate Indicator Blinking depth reading SLOW and four segments shown ascent rate is more than 10 m min 33 ft min This is a caution to slow down The STOP sign means that you are advised to make a Mandatory Safety Stop when you reach the depth of 6 m 20 ft 61 A WARNING DO NOT EXCEED THE MAXIMUM ASCENT RATE Rapid as cents increase the risk of injury You should always make the Mandatory and Recommended Safety Stops after you have ex ceeded the maximum recommended ascent rate If this Mandatory Safety Stop is not completed the decompression model will penalize your next dive s 6 1 6 Decompression dives When your NO DEC TIME becomes zero your dive changes into a decompression dive Therefore 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 62 If you exceed the no decompression limits on a dive the dive computer will provide the decompression information required for ascent After this the instrument will continue to provide subsequent interval and repetitive dive information Rather than requiring you to make stops at fixed depths the dive computer lets you decompress within a range of depths continuous decompression The ascent time ASC TIME is the minimum amount of time n
60. pression time limits mins for various depths m for the first dive of a series Depth Personal Mode Altitude Mode m PO AO PO A1 PO A2 P1 A0 P1 A1 P1 A2 P2 A0 P2 A1 P2 A2 36 10 6 4 9 5 3 9 5 3 39 8 5 3 8 4 3 7 4 3 42 6 4 3 6 4 3 5 3 2 45 5 3 2 5 3 2 4 3 2 Table 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 Depth Personal Mode Altitude Mode ft PO AO PO A1 PO A2 P1 A0 P1 A1 P1 A2 P2 A0 P2 A1 P2 A2 30 199 144 93 176 130 82 156 117 73 40 120 74 52 103 67 48 90 61 44 50 69 50 33 63 45 30 57 41 28 60 50 33 23 46 31 21 41 28 19 70 36 25 16 33 23 14 30 21 12 80 28 18 10 26 17 10 23 15 9 109 No decompression time limits mins for various depths ft for the first dive of a series Depth Personal Mode Altitude Mode fo PO AO PO A1 PO A2 P1 A0 P1 A1 P1 A2 P2 A0 P2 A1 P2 A2 90 21 13 8 19 11 7 18 10 6 100 17 10 5 15 9 5 13 8 5 110 12 7 4 11 7 4 10 6 4 120 10 6 4 9 5 3 8 5 3 130 8 5 3 7 4 3 6 4 3 140 6 4 3 6 4 2 5 3 2 150 5 3 2 5 3 2 4 3 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
61. remove the back cover Re move the computer and the display shield Install new display shield and reinstall computer and console back 9 5 COMPASS ATTACHMENT Unscrew the four screws at the back of the console and remove the back cover Re place the console end part with compass Reassemble console Figure 9 1 Opening of the securing ring 102 10 TECHNICAL DATA 10 1 Technical specifications Dimensions and weight e Diameter width 73 mm 2 85 in length 165 mm 6 50 in e Thickness 35 mm 1 40 in e Weight 210 g 7 4 oz without hose Depth gauge e Temperature compensated pressure sensor Calibrated complying with EN 13319 Maximum depth of operation 80 m 262 ft complying with EN 13319 Accuracy 1 of full scale or better from 0 to 80 m 262 ft at 20 C 68 F complying with EN 13319 e Depth display range 0 to 150 m 492 ft e Resolution 0 1 m from 0 to 100 m 1 ft from 0 to 328 ft Cylinder pressure gauge e Rated working pressure 300 bar 4000 psi maximum allowed pressure e Resolution 1 bar 10 psi Other displays Dive time 0 to 999 min counting starts and stops at 1 2 m 4 ft depth Surface time 0 to 99 h 59 min e Dive counter 0 to 99 for repetitive dives No decompression time 0 to 199 min after 199 e Ascent time 0 to 99 min after 99 103 Ceiling depths 3 0 to 100 m 10 to 328 ft e Air time 0 to 99 min after 99 Temperature display e Resolution 1 C 1 F e Displ
62. riched air blends in your cylinders e the oxygen percentage is adjusted according to the measured Nitrox blend in your cylinder e the oxygen partial pressure limit is set correctly The dive computer is now ready for diving 5 8 3 Battery power indication This dive computer has a unique graphic Battery Power Indicator designed to give you an advance notice of impending need to change the battery The Battery Power Indicator can always be seen when the Dive mode is activated The electroluminescent backlight will be on during the battery check The following Table and Figure show the various warning levels Temperature 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 indication After the battery check the low battery warning is indicated by the battery symbol 45 Figure 5 7 Low Battery Warning Battery symbol indicates that the battery is low and battery replacement is recommended If the battery symbol is displayed in the Surface mode or if the display is faded or weak the battery may be too low to operate the dive computer and battery replacement is recommended NOTE For safety reasons the backlight cannot be activated when the low battery warning is indicated by the battery symbol
63. rin ciples Battery One 3 V lithium battery CR 2450and 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 20 C 68 F e Odives year gt 3 years e 100 dives year gt 2 years e 400 dives year gt 1 year The following conditions have an effect on the expected battery lifetime The length of the dives The conditions in which the unit is operated and stored for example temperat ure cold conditions Below 10 C 50 F the expected battery lifetime is about 50 75 of that at 20 C 68 F The use of the backlight and audible alarms 105 e The quality of the battery Some lithium batteries may exhaust unexpectedly which cannot be tested in advance e 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 even though the battery has enough ca pacity In this case the warning usually disappears when the DIVE mode is activated again 10 2 RGBM The Suunto Reduced Gradient Bubble Model RGBM is a modern algorithm for pre dicting both dissolved and free gas in the tissues and blood of divers It was developed in co operation between Suunto and Bruce R Wienke BSc MSc PhD It is based on both laboratory experiment
64. rmally if you descend below the ceiling within this three minute period When the dive computer is in the permanent Error mode only the Er warning is shown in the center window The dive computer does not show times for ascent or stops However all the other displays function as before to provide information for ascent You must 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 36 After surfacing you should not dive for a minimum of 48 hours During the permanent Error mode the Er text is displayed in the center window and the planning mode is disabled 5 6 Air integration The Cobra can be attached to the high pressure port of the regulator enabling you to receive cylinder pressure and remaining air time data 5 6 1 Connecting Suunto Cobra to a regulator When purchasing the Suunto Cobra we strongly recommend that you have your Suunto representative attach it to the first stage of your regulator However if you decide to attach it yourself follow the steps outlined below 1 Remove the high pressure HP port plug on the first stage of your regulator using an appropriate tool 2 Thread the high pressure hose of the Suunto Cobra into the HP port of your reg ulator with your fingers Tighten the hose fitting with a 16 mm 5 8 wrench DO NOT OVERTIGHTEN 3 Attach the regulator to the scuba cylinder and slowly open the valve Check for leaks by
65. s and diving data including data from DAN It is a significant advance on the classical Haldane models which do not predict free gas microbubbles The advantage of Suunto RGBM is additional safety through its ability to adapt to a wide variety of situations Suunto RGBM addresses a number of diving circumstances outside the range of dissolved gas only models by e Monitoring continuous multiday diving e Computing closely spaced repetitive diving e Reacting to a dive deeper than the previous dive e Adapting to rapid ascents which produce high microbubble silent bubble build up e Incorporating consistency with real physical laws for gas kinetics 106 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 mi crobubble influence On repetitive dives adjustment may also be applied to the maximum allowable nitrogen overpressure in each theoretical tissue group Depending on the circumstances Suunto RGBM will adapt the decompression oblig ations by doing any or all of the following e Reducing No decompression Stop dive times e Adding Mandatory Safety Stops e Increasing Decompression Stop times e Advising an extended surface interval
66. setting will result in erroneous dive and planning data DO NOT EXCEED THE MAXIMUM ASCENT RATE Rapid as cents increase the risk of injury You should always make the Mandatory and Recommended Safety Stops after you have ex ceeded the maximum recommended ascent rate If this Mandatory Safety Stop is not completed the decompression model will pen alize your next dive s YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DIS PLAYED BY THE INSTRUMENT The ascent time will increase if you remain at depth ascend slower than 10 m min 33 ft min or make your decompression stop deeper than at the ceiling These factors will also increase the amount of air required to reach the surface 13 WARNING WARNING WARNING WARNING NEVER ASCEND ABOVE THE CEILING You must not ascend above the ceiling during your decompression In order to avoid doing so by accident you should stay somewhat below the ceiling DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU HAVE NOT PERSONALLY VERIFIED ITS CONTENTS AND ENTERED THE ANALYSIS VALUE INTO YOUR DIVE COM PUTER Failure to verify cylinder contents and enter the appropri ate O into your dive computer will result in incorrect dive planning information DO NOT DIVE WITH A GAS IF YOU HAVE NOT PERSONALLY VERIFIED ITS CONTENTS AND ENTERED THE ANALYZED VALUE INTO YOUR DIVE COMPUTER Failure to verify cylinder contents and enter the appropriate gas values where applicable into your dive computer
67. sion illness Decompression Decompression range Decompression illness Dive series Dive time AP EAD EAN Enriched air nitrox Equivalent air depth Floor 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 inad equately 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 Delta P describing the Cylinder Pressure drop during the dive the differ ence in cylinder pressure between the beginning and 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 ad ded Standard mixes are EAN32 NOAA Nitrox NN I and EAN36 NOAA Nitrox Il NN Il Nitrogen partial pressure equivalent table The deepest depth during a decompression stop dive at which decom pression takes place 11
68. 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 110 Before high altitude diving the instrument must be set to the Altitude Adjustment mode to adjust the calculations for the new altitude The maximum partial pressures of nitro gen allowed by the mathematical model of the dive computer are reduced according to the lower ambient pressure As a result the allowed no decompression stop limits are considerably reduced 10 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 For example e The displayed oxygen exposure calculations are raised to the next higher percent age value e The CNS limits up to1 4 bar are based on 1991 NOAA Diving Manual limits e The OTU monitoring is based on the long term daily tolerance level and the recovery rate is reduced e for recreational scuba diving the recommended upper limit of 1 4 bar PO2 is used as a default 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 duri
69. submerging the regulator first stage in water If leaks are detected check the condition of the O ring and sealing surfaces 37 5 7 DIVE mode settings Suunto Cobra 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 settings are only available in the submode The Set Modes 3 SET include dive configuration and setup options that have to be set before the dive The Set Modes are divided into three submodes for setting the dive related parameters time related parameters and your personal preferences Time related parameters 2 SET TIME and personal preferences 3 SET PREF are introduced in Section 4 1 SET MODES 3 SET To enter the Dive Parameter Setting Mode select MODE 3 SET 1 SET DIVE The Dive Parameter Setting mode 1 SET DIVE 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 The figure below shows how to enter the DIVE mode settings menu BZA NOTE Some settings cannot be changed until five 5 minutes has elapsed after the dive 38 5 7 1 Setting the personal altitude adjustments 1 AdJ MODE The current Altitude and Personal Adjustment settings are displayed in the startup screen when diving at the surface If the mode does not
70. sure reaches 50 bar 725 psi The next three double beeps are heard when the cylinder pressure reaches 35 bar 500 psi and when the remaining air time reaches zero 58 wi 7 ou Ho mm UT aR TE J NODECTING J Figure 6 5 Cylinder pressure warnings Pressure has dropped below 50 bar 725 psi Pressure display is blinking and there is an audible alarm 6 1 4 Consumed Bottom Time CBT The available no decompression time is also shown visually in the multi function bar graph on the left side of the display When your available no decompression time de creases below 200 minutes the first lowest bar graph segment appears As your body absorbs more nitrogen more segments start to appear Green Zone As a safety precaution Suunto recommends you should maintain the no decompression bar graph within the green zone Segments start to appear when the available no decompression time decreases below 100 80 60 50 40 30 and 20 minutes Yellow Zone As the bars reach the yellow zone your no decompression stop time is less than 10 or 5 minutes and you are getting very close to no decompression limits At this point you should start your ascent towards the surface 59 Red Zone As all of the bars appear red zone your no decompression stop time has become zero and your dive has become a decompression stop dive for more information see Section 6 1 6 Decompression dives 6 1 5 Ascent rate indicator The ascent ra
71. t first receiving certified training in this specialty 5 1 The Suunto RGBM Suunto s Reduced Gradient Bubble Model RGBM utilized in the Suunto Cobra 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 31 In order to optimize the response to different increased risk situations an additional category of stop referred to as a Mandatory Safety Stop has been introduced The combination of stop types depends on the user settings and the specific dive situation To get the most from the RGBM safety benefits refer to Section 10 2 RGBM 5 2 Emergency ascents In the unlikely event that the dive computer malfunctions during a dive follow the emergency procedures provided by your certified dive training agency or alternatively follow these steps 1 Assess the situation calmly and then move promptly to less than 18 m 60 ft 2 At 18 m 60 ft slow down your ascent rate to 10 m 33 ft per minute and move to a depth between 3 and 6 m 10 and 20 ft 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 is based on current decompression research and technology you must realiz
72. tag ina paid abd shoved ee chaste AAA peed aki AANEEN 114 N C Barer cicac eh cand ranch etn Peal E E AEA Meteosat kekak tet 2s 114 IZ2 EN ABS TOG 5 ac eee oe deere ajature radeon be ena Sareea se hdr de seer sameuaiite aden te 114 12 3 EN 250 FOH direa aa r a TEA E anomie ee toen DEAT a 114 13 SUUNTO LIMITED WARRANTY ccccccecceeeeeeeneeeeeeeeeeeeaeees 115 14 DISPOSAL OF THE DEVICE serier igi vor aie os dese oie ieee ek Paves 117 GLOSSARY iccuie hac uedaaneigidieoned Ee NEE deeds fa E SE MA L OARE EEANN a Ae 118 1 WELCOME TO THE WORLD OF SUUNTO DIVE COMPUTERS Suunto Cobra dive computer is designed to help you get the most out of your diving The Cobra builds on the Suunto tradition of delivering feature rich dive computers The Cobra provides many new and enhanced features that cannot be found in any other air integrated dive computer Push button controls access a wide selection of choices The display is optimized for the dive mode chosen This air integrated dive computer is a compact and sophisticated multipurpose dive instrument designed to give you years of trouble free service Sed The Suunto Cobra User s Guide contains vitally important information which enables you to become familiar with your Suunto dive computer To understand the use dis plays and limitations of the instrument before using it please read this user s guide carefully and save it for further reference Note also that a glossary is included at
73. te is displayed graphically along the right hand side with a vertical bar When the maximum allowed ascent rate is exceeded the fifth SLOW warning segment and the STOP sign appear and the depth reading starts to blink indicating that the maximum ascent rate has been exceeded continuously or that the current ascent rate is significantly above the allowed rate Table 6 1 Ascent rate indicator Ascent rate incicator The equivalent ascent speed No segment Below 4 m min 13 ft min One segment 4 6 m min 13 20 ft min Two segments 6 8 m min 20 26 ft min Three segments 8 10 m min 26 33 ft min Four segments 10 12 m min 33 39 ft min Four segments the SLOW seg Above 12 m min 39 ft min or continuously 10 ment blinking depth reading the m min 33 ft min STOP sign and an audible alarm 60 When the maximum allowed ascent rate is exceeded the fifth SLOW warning segment and the STOP sign appear and the depth reading starts to blink indicating that the maximum ascent rate has been exceeded continuously or that the ascent rate is above the allowed maximum rate Whenever the SLOW warning segment and the STOP sign appear you should imme diately slow down your ascent When you reach the depth zone between 6 m to 3 m 20 ft to 10 ft the STOP and CEILING depth labels will advise you to make a Mandatory Safety Stop Wait until the warning disappears You should not ascend shallower than 3 m 10 ft with the Mandat
74. tely The ceiling depth is shown on the right top corner and the minimum total ascent time on the right side of the center win dow 65 Figure 6 9 Decompression dive below floor Upward pointing arrow blinking ASC TIME label and an audible alarm tell you to ascend Minimum total ascent time including safety stop is 7 minutes Ceiling is at 3 m 10 ft Display above the floor When you ascend above the floor the ASC TIME sign stops blinking and the upward pointing arrow disappears Below is an example of a decompression dive above the floor 66 Figure 6 10 Decompression dive above the floor The upward pointing arrow has disappeared and the ASC TIME label has stopped blinking which means that you are in the decompression range Decompression will now begin but is very slow Therefore you should 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 67 Figure 6 11 Decompression dive at ceiling zone Two arrows point at each other hour glass You are in the optimum ceiling zone at 3 5 m 11 ft and your minimum ascent time is 5 minutes Pressing TIME button activates alternative display During the decompression stop ASC TIME will count down towards zero When the ceiling moves upwards you can ascend to the new ceiling You ma
75. u can always download the latest version of the DM4 from http www suunto com Please check for updates regularly as new features are constantly being developed The following data is transferred from your dive computer to your laptop optional cable required 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 the NITROX mode tissue calculation data additional dive information for example SLOW and Mandatory Safety Stop viola tions Diver Attention Symbol Bookmark Surfaced Mark Decompression Stop Mark and Ceiling Error Mark e dive computer serial number personal information 30 characters 90 cylinder pressure at the beginning and at the end of the dive i e pressure drop AP during dive surface air consumption Altitude and Personal adjustment settings By using the DM4 you are able to enter setup options such as input a personal 30 character field into the Suunto instrument reset the Scuba History s maximum depth to zero manually add comments multimedia and other personal information to the PC based dive data files change the sample rate for profile records logbook from the default 20 second in terval to 10 30 or 60 seconds To enter the Data Transfer mode select MODE 1 MEMORY 3 TR PC ZA NOTE While in the Data Transfer mode the connector w
76. ve related parameters Dive Parameter Settings 1 SET DIVE are introduced in more detail in Section 5 7 DIVE mode settings Figure 4 3 Setting Options 3 SET 24 4 1 1 Setting Time 2 SET TIME To enter the Time Setting mode select MODE 3 SET 2 SET TIME The Time Setting mode has three options 1 AdJ Time 2 AdJ Date and 3 T ALARM Daily Time Alarm Adjusting Time 1 AdJ TIME To enter the Time Setting mode select MODE 3 SET 2 SET TIME 1 AdJ TIME After entering this mode you are able to select between 12 h and 24 hour time formats and set the correct time by using the SMART MODE and scroll buttons Figure 4 4 Adjusting the Time setting Adjusting Date 2 AdJ DATE To enter the Date Setting mode select MODE 3 SET 2 SET TIME 2 AdJ DATE After entering this mode you are able to set the correct year month and day in this order 25 B NOTE The day of the week is automatically calculated in accordance with the date The date can be set within the range of Jan 1 1990 to Dec 31 2089 Figure 4 5 Adjusting the Date setting mode 2 AdJ DATE Adjusting Daily Alarm 3 T ALARM You can set one daily alarm in the dive computer When the daily alarm activates the time symbol blinks for 1 minute and the alarm sounds for 24 seconds The alarm is given at the preset time each day Press any button to stop the audible alarm after it has activated To enter the Daily Alarm Setting mode select MODE 3 SET
77. will result in incorrect dive planning inform ation Diving with gas mixtures exposes you to risks that are different from those associated with diving with standard air These risks are not obvious and require training to understand and avoid Risks include possible serious injury or death WARNING WARNING WARNING WARNING Traveling to a higher elevation can temporarily cause a change in the equilibrium of dissolved nitrogen in the body It is recom mended that you acclimatize to the new altitude by waiting at least three hours before diving WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE MAXIMUM LIMIT IS REACHED YOU MUST IMMEDIATELY TAKE ACTION TO REDUCE OXYGEN EXPOSURE Failure to take action to reduce oxygen exposure after the warning is given can rapidly increase the risk of oxygen toxicity injury or death Suunto also recommends that you receive training in Free diving techniques and physiology before conducting breath hold dives No dive computer can replace the need for proper dive training Insufficient or improper training may cause a diver to commit errors that may lead to serious injury or death Using the Suunto Dive Planner software is not a substitute for proper dive training Diving with mixed gases has dangers that are not familiar to divers diving with air To dive with trimix triox heliox and nitrox or all of them divers must have specialized training for the type of diving they are doing 15 A
78. xcellent tool for becoming familiar with the dive computer and planning your dives Suunto recommends using the dive simulator to run through different dive scenarios 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 Cylinder pressure drop is simulated with a constant depth dependant consumption To enter the Dive Simulator mode select MODE 2 SIMUL 1 SIMDIVE 93 Figure 7 12 Dive Simulator mode 1 SIMDIVE Descend by pressing the arrow down TIME button and ascend by pressing the arrow up PLAN button 7 6 2 Dive Planning Simulator 2 SIMPLAN The Dive Planning Simulator mode shows you the present no decompression limits In this mode you are also 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 To enter the Dive Planning Simulator mode select MODE 2 SIMUL 2 SIMPLAN 94 Figure 7 13 Dive Planning Simulator mode 2 SIMPLAN Add desired surface interval increment to present shown surface interval by pressing TIME and PLAN buttons This display is only shown for
79. y diving activity up to four days prior to initial use of the computer may cause misleading information and must be avoided 11 A WARNING WARNING 12 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 decompres sion calculations If there is a desire to adjust the computer to provide more conservative calculations use the personal adjust ment feature to affect decompression calculations or reduce the PO setting to affect oxygen exposure according to the entered 02 and POs values SET THE CORRECT ALTITUDE ADJUSTMENT MODE When diving at altitudes greater than 300 m 1000 ft the Altitude Adjust ment feature must be correctly selected in order for the computer to calculate the decompression status The dive computer is not intended for use at altitudes greater than 3000 m 10000 ft Failure to select the correct Altitude Adjustment setting or diving above the maximum altitude limit will result in erroneous dive and plan ning data WARNING WARNING WARNING SET THE CORRECT PERSONAL ADJUSTMENT MODE Whenever it is believed that factors that tend to increase the possibility of DCI exist it is recommended that you use this option to make the calculations more conservative Failure to select the correct Personal Adjustment
80. y surface only after the ASC TIME and CEILING labels have disappeared which means that the decom pression 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 3 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 68 Figure 6 12 Decompression dive above ceiling Note a downward pointing arrow an Er warning and an audible alarm You should immediately within 3 minutes descend to or below ceiling In addition an Error warning Er reminds you that you have only three 3 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 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 refer to Section 5 5 Error conditions 6 2 Diving in NITROX mode This dive computer can be set for diving with standard air only Air mode or it can be set for diving with Enriched Air Nitrox EANx Nitrox mode 69 6 2 1 Before diving in the 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 e

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