Suunto COBRA3 User Manual Download Page 1

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USER’S GUIDE

COBRA3

Summary of Contents for COBRA3

Page 1: ...EN USER S GUIDE COBRA3 ...

Page 3: ... alarms 17 5 6 Error conditions 18 5 7 Air integration 18 5 7 1 Connecting Suunto Cobra3 to a regulator 19 5 8 DIVE mode settings 19 5 8 1 Setting the depth alarm 19 5 8 2 Setting the dive time alarm 19 5 8 3 Setting the nitrox values 20 5 8 4 Setting the personal altitude adjustments 20 5 8 5 Setting the sample rate 21 5 8 6 Setting the Safety Stops Deep Stops 21 5 8 7 Setting the RGBM values 21 ...

Page 4: ... history MEMHistory 39 7 7 Suunto Dive Manager SDM 40 7 8 www suuntosports com and Suunto Diving World at www suunto com diving 40 8 CARE AND MAINTENANCE OF MY SUUNTO DIVING COMPUTER 42 9 BATTERY REPLACEMENT 44 9 1 Battery kit 44 9 2 Required tools 44 9 3 Replacing the battery 44 10 TECHNICAL DATA 46 10 1 Technical specifications 46 10 2 RGBM 47 10 2 1 Suunto RGBM adaptive decompression 47 10 2 2 ...

Page 5: ...d gas switching Suunto Cobra3 simplifies your diving experience because all the information you need relating to depth time tank pressure decompression status and direction is available on one easy to read screen To get the most out of your Suunto Cobra3 please read this instruction manual carefully and make sure you understand the use displays and limitations of the instrument before using it To ...

Page 6: ...or recreational use only The demands of commercial or professional diving may expose the diver to depths and conditions that tend to increase the risk of decompression illness DCI Therefore Suunto strongly recommends that the device is not used for any commercial or professional diving activities WARNING ONLY DIVERS TRAINED IN THE PROPER USE OF SCUBA DIVING EQUIPMENT SHOULD USE A DIVE COMPUTER No ...

Page 7: ...THE DIVE COMPUTER SHOULD NEVER BE TRADED OR SHARED BETWEEN USERS WHILE IT IS IN OPERATION Its information will not apply to someone who has not been wearing it throughout a dive or sequence of repetitive dives Its dive profiles must match that of the user If it is left on the surface during any dive the dive computer will give inaccurate information for subsequent dives No dive computer can take i...

Page 8: ...ns more conservative Failure to select the correct Personal Adjustment setting will result in erroneous dive and planning data WARNING This device contains a Lithium cell battery To reduce the risk of fire or burns do not disassemble crush puncture short external contacts or dispose of in fire or water Replace only with manufacturer specified batteries Recycle or dispose of used batteries properly...

Page 9: ...ols and functions The table below explains the main functions of the dive computer s buttons The buttons and their use are explained in more detail in the relevant sections of the manual Table 3 1 Button symbols and functions Main functions Press Button Symbol Switch between main modes Switch from submode to main mode Activate backlight in DIVE mode Short MODE Activate backlight in other modes Lon...

Page 10: ... Button Symbol Enable gas switching in NITROX mode Long UP Toggle between alternative displays Change submode Decrease values Short DOWN Enter Setting mode Toggle between ceiling and remaining air time display Long DOWN 10 ...

Page 11: ...s section we look at how to do this NOTE The display is illuminated by holding down the MODE button for more than 2 seconds The following figure shows how to enter the TIME SETTINGS menu USE UP AND DOWN BUTTONS TO TOGGLE BETWEEN ALARM TIME DATE UNITS BACKLIGHT AND TONES 4 1 1 Setting the alarm The dive computer has a daily alarm function When the daily alarm activates the screen blinks and the ala...

Page 12: ...0 seconds When the backlight is turned off it does not illuminate when an alarm sounds ADJUST WITH UP AND DOWN BUTTONS ACCEPT WITH SELECT BUTTON 4 1 6 Setting the tones The TONE SETTING mode allows you to activate or deactivate the tones ADJUST WITH UP AND DOWN BUTTONS ACCEPT WITH SELECT BUTTON NOTE When the tones are off there are no audible alarms 4 2 AC water contacts The water and data transfe...

Page 13: ... AS WELL AS BEARING OR DIVE TIME OR TEMPERATURE ARE DISPLAYED NOTE When accessed from DIVE mode toggle between the alternative displays by pressing the UP DOWN buttons 4 3 1 Compass display The Suunto Cobra3 displays the compass as a graphical representation of a compass rose The rose displays the cardinal and half cardinal points in addition to which the current bearing is also displayed numerica...

Page 14: ... compass whenever it doesn t seem to operate properly or after replacing the dive computer s battery First the compass is level calibrated and after a successful level calibration the compass is tilt calibrated The tilt calibration compensates for tilting the compass in any direction in angles of up to 45 Strong electromagnetic fields such as power lines stereo speakers and magnets can affect the ...

Page 15: ... center Declination You can compensate for the difference between true north and magnetic north by adjusting the compass declination The declination can be found for example from sea charts or topographic maps of the local area ADJUST WITH UP AND DOWN BUTTONS ACCEPT WITH SELECT BUTTON Time out You can set the compass time out to 1 3 or 5 minutes After the set time has passed from the latest button...

Page 16: ... its ability to adapt to a variety of situations and dive profiles The Suunto Cobra3 uses traditional recommended safety stops as well as deep stops YOU ARE ADVISED TO MAKE A DEEPSTOP AT 18 M THE SECOND INDICATOR SHOWS THAT YOU HAVE 110 SECONDS LEFT OF YOUR DEEPSTOP In order to optimize the response to different increased risk situations an additional category of stop referred to as a Mandatory Sa...

Page 17: ...uter is activated Short single beep Dive computer automatically returns to the TIME mode Cylinder pressure reaches 50 bar 725 psi The cylinder pressure display will start to blink Three beeps with a three second interval Cylinder pressure reaches the selected alarm pressure Calculated remaining air time reaches zero No decompression dive turns into a decompression stop dive An arrow pointing upwar...

Page 18: ...ter 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 i e when you stay above the ceiling for more than three minutes During this three minute period the Er warning i...

Page 19: ... has several user definable functions as well as depth and time related alarms that you can set according to your personal preferences The DIVE mode settings are dependent on the dive submode chosen AIR NITROX GAUGE so that for example nitrox settings are only available in the NITROX submode The following figure shows how to enter the DIVE mode settings menu USE UP AND DOWN BUTTONS TO TOGGLE BETWE...

Page 20: ... ON the mixes you actually have available and remember to check the set values to make sure they are correct The default oxygen percentage O2 setting is 21 air and oxygen partial pressure PO2 setting 1 4 bar After entering values for MIX1 you can enable disable and set an additional gas mix MIX2 ADJUST WITH UP AND DOWN BUTTONS ACCEPT WITH SELECT BUTTON ADJUST WITH UP AND DOWN BUTTONS ACCEPT WITH S...

Page 21: ...P AND DOWN BUTTONS ACCEPT WITH SELECT BUTTON 5 8 7 Setting the RGBM values For certain divers and diving conditions it may be desirable to set the attenuated RGBM mode The selection is displayed during the DIVE mode startup The options are full RGBM effects 100 and attenuated RGBM 50 ADJUST WITH UP AND DOWN BUTTONS ACCEPT WITH SELECT BUTTON 5 8 8 Setting the units Use Unit Settings to choose betwe...

Page 22: ...necessary to activate the DIVE mode BEFORE diving to check the altitude and personal adjustment settings battery condition oxygen settings etc After activation all graphical display elements are turned on and the backlight and the beep are activated After this the selected altitude and personal settings are displayed as well as the RGBM and Deep Stop status A few seconds later the battery power in...

Page 23: ...low battery warning is indicated by the battery symbol 5 9 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 compute...

Page 24: ...onservative P2 The dive computer then adjusts its mathematical model according to the entered Personal Adjustment setting giving shorter no decompression times see Section 10 2 2 No decompression limits Table 10 1 No decompression time limits for various depths m and Table 10 2 No decompression time limits for various depths ft Table 5 5 Personal Adjustment settings Desired tables Condition Person...

Page 25: ...more than 5 seconds the microbubble build up is predicted to be more than is allowed for in the decompression model The Suunto RGBM calculation model responds to this by adding a Mandatory Safety Stop to the dive The time of this Mandatory Safety Stop depends on the severity of the ascent rate excess The STOP sign appears in the display and when you reach the depth zone between 6 m and 3 m 20 ft a...

Page 26: ...surface interval time before your next dive 5 11 Deep stops Deep Stops are safety stops that occur deeper than traditional stops with the purpose of minimizing microbubble formation and excitation The Suunto RGBM model calculates deep stops iteratively placing the first stop about halfway between the maximum depth and the ceiling depth After the first Deep Stop is completed another Deep Stop will ...

Page 27: ...de manually before entering the water in order to perform the necessary dive pre checks 6 1 1 Basic dive data During a No decompression dive the following information is displayed your present depth in meters feet the available no decompression time in minutes as NO DEC TIME the ascent rate presented as a bar graph on the right side the Diver Attention Symbol if surface interval should be prolonge...

Page 28: ...ill 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 consumption The change in your air consumption will be based on constant one second interval pressure measurements over 30 60 second periods An increase in air consumption will influence the remaining a...

Page 29: ...uous ascent rate violations will result in Mandatory Safety Stops When Recommended Deep Stop is enabled the length is indicated in seconds 6 1 5 Safety Stops A 3 minute Recommended Safety Stop is prompted after every dive to over 10m 6 1 6 Decompression dives When your NO DEC TIME becomes zero your dive becomes a decompression dive so you must perform one or more decompression stops on your way to...

Page 30: ...the decompression will be very slow at or close to the floor The depth of the ceiling and floor will depend on your dive profile The ceiling depth will be fairly shallow when you enter the decompression mode but if you remain at depth it will move downward and the ascent time will increase Likewise the floor and ceiling may change upwards while you are decompressing When conditions are rough it ma...

Page 31: ...ME will count down towards zero When the ceiling moves upwards you can ascend to the new ceiling You may surface only after the ASC TIME and CEILING labels have disappeared which means that the decompression stop and any Mandatory Safety Stop have been completed You are advised however to stay until the STOP sign has also disappeared This indicates that the three minute Recommended Safety Stop has...

Page 32: ... set O2 When the dive computer is set in NITROX mode the Dive Planning mode calculates using the O2 and PO2 values that are currently in the computer To set the nitrox mixes refer to Section 5 8 3 Setting the nitrox values Default nitrox settings In NITROX mode the Suunto Cobra3 allows you to set 1 or 2 nitrox mixes containing 21 99 oxygen In the NITROX mode the default setting for MIX1 is standar...

Page 33: ... exposure 6 2 4 Gas change and multiple breathing gas mixes The Suunto Cobra3 allows gas changes to enabled gas mixes during the dive Gas changes are made by following the procedure below CHANGING GAS MIX SCROLL THROUGH ENABLED MIXES BY PRESSING THE UP OR DOWN BUTTONS SELECT NEW MIX BY PRESSING THE SELECT BUTTON NOTE Mix number O2 and PO2 for the mixes are shown when scrolling If the set PO2 limit...

Page 34: ...he dive and used as a stopwatch by pressing the SELECT button BY PRESSING THE SELECT BUTTON DURING A DIVE A BOOKMARK IS WRITTEN IN THE PROFILE MEMORY THE DIVE TIMER IS RESET AND THE PREVIOUSLY TIMED INTERVAL IS DISPLAYED BELOW NOTE The GAUGE mode does not provide decompression information NOTE There is no ascent rate monitoring in the GAUGE mode NOTE If you dive with the GAUGE mode it is not possi...

Page 35: ... partial pressure labeled PO2 the current oxygen toxicity exposure labeled OLF 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...

Page 36: ...a and Hyperbaric 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 exceptions to this recommendation are If a diver has less than 2 hours total accumulated dive time in the last 48 hours a 12 hour surface interval befo...

Page 37: ...lections are explained in Section 5 9 4 Diving at altitude and in Section 5 9 5 Personal adjustments Dive numbering shown during dive planning Dives belong to the same repetitive dive series if the instrument was still counting down the no fly time at the beginning of the dive The surface interval must be at least 5 minutes for a dive to be considered a repetitive dive Otherwise it is considered a...

Page 38: ...EMLogbook and dive history MEMHistory The dive time and date are registered in the Logbook memory Always check before diving that the time and date are correctly set especially after traveling between different time zones 7 6 1 Dive logbook MEMLogbook The Suunto Cobra3 has a very sophisticated high capacity Logbook and Profile Memory The data is recorded in the profile memory based on the selected...

Page 39: ...he 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 Section 7 2 Dive numbering for further information 7 6 2 Dive history MEMHistory The dive history is a ...

Page 40: ...e able to enter setup options such as input a personal 30 character field into the Suunto Cobra3 reset the Dive History s maximum depth to zero It is also possible to manually add comments multimedia and other personal information to the PC based dive data files 7 8 www suuntosports com and Suunto Diving World at www suunto com diving When you have dived and transferred your dive data to your Suun...

Page 41: ...To learn more about SuuntoSports com s functions and activities visit the site try them and if necessary use the site Help The Help is available on the right side of the bar that divides the screen 41 ...

Page 42: ...y compartment immediately have the instrument checked by your SUUNTO dealer or distributor Should you detect scratches cracks or other such flaws on the display that may impair its durability immediately have it replaced by your SUUNTO dealer or distributor Wash and rinse the unit in fresh water after every use Protect the unit from shock extreme heat direct sunlight and chemical attack The dive c...

Page 43: ...buted through Suunto s worldwide network of authorized Suunto distributors and retailers Original Suunto accessories are tested to be compatible with Suunto products and can be used safely NOTE Damage caused by non original accessories will not be covered by warranty HOW TO GET MORE INFORMATION You can find service warranty information in these pages by searching the FAQs If you do not find the an...

Page 44: ... 2 Required tools A Phillips head screwdriver Soft cloth for cleaning Needlenose pliers or small screwdriver for turning securing ring 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 console 2 Thoroughly rinse...

Page 45: ...O ring is not at any point protruding out on the edge 14 Put your other thumb through the locking ring Press this thumb firmly against the lid and release the other one Make sure that the lid is pressed completely down 15 Turn the locking ring counterclockwise with your free thumb and fingers until it snaps into its locked position 16 The dive computer should now active its timekeeping mode and sh...

Page 46: ...al 20 seconds adjustable 1 10 20 30 60s Memory capacity approximately 42 hours of diving with 20 second recording interval Depth accuracy 0 3 m 1 ft Operating conditions 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 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 temp...

Page 47: ...om 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 Monitoring continuous multiday diving Computing closely spaced repetitive ...

Page 48: ...ious depths m No decompression time limits mins for various depths m for the first dive of a series Personal Mode Altitude Mode Depth m P2 A2 P2 A1 P2 A0 P1 A2 P1 A1 P1 A0 P0 A2 P0 A1 P0 A0 75 45 29 96 54 35 130 67 43 96 54 35 130 67 43 163 89 57 130 67 43 163 89 57 124 72 9 12 15 21 15 12 25 20 16 30 23 19 5 20 16 30 23 19 39 29 24 30 23 19 39 29 24 52 37 29 18 21 24 9 7 6 12 9 8 15 12 9 12 9 8 1...

Page 49: ...ced 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 the displayed oxygen exposure calculations are raised to the next higher percentage value for recreational scuba diving the recommended upper limit of...

Page 50: ...t from Suunto 11 2 Trademark Suunto Cobra3 Consumed Bottom Time CBT Oxygen Limit Fraction OLF Suunto Reduced Gradient Bubble Model RGBM and Continuous Decompression and their logos are all registered or unregistered trademarks of Suunto All rights are reserved 11 3 Patent notice This product is protected by the following patents and patent applications US 5 845 235 and US11 152 075 Other patents h...

Page 51: ...pen circuit self contained compressed air diving apparatus Requirements testing marking The cylinder pressure gauge and the parts of this product used in measuring the cylinder pressure meet the requirements set in the section of the European Standard EN 250 that concern cylinder pressure measurements The instruments must be serviced by an authorized Suunto representative every second year or afte...

Page 52: ...y Period starts at the date of retail purchase by the original end user purchaser The Product may consist of several different parts and the different parts may be covered by a different warranty period hereinafter Warranty Period The different Warranty Periods are a Two 2 years for the diving computers b One 1 year for the consumable parts and accessories including but not limited to chargeable b...

Page 53: ...rned in a reasonable amount of time This shall be determined at the sole discretion of Suunto or a Suunto Authorized Service Center If the Product is found not to be covered by the terms and conditions of this Limited Warranty Suunto or a Suunto Authorized Service Centre reserve the right to charge a handling fee Any claim under this Limited Warranty is subject to you notifying Suunto or a Suunto ...

Page 54: ...NTY BREACH OF CONTRACT NEGLIGENCE STRICT TORT OR ANY OTHER LEGAL OR EQUITABLE THEORY EVEN IF SUUNTO KNEW OF THE LIKELIHOOD OF SUCH DAMAGES SUUNTO SHALL NOT BE LIABLE FOR DELAY IN RENDERING SERVICE UNDER THE LIMITED WARRANTY OR LOSS OF USE DURING THE TIME THE PRODUCT IS BEING REPAIRED 54 ...

Page 55: ...SAL OF THE DEVICE Please dispose of the device in an appropriate way treating it as electronic waste Do not throw it in the garbage If you wish you may return the device to your nearest Suunto representative 55 ...

Page 56: ...ape naturally from tissues Decompression range 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 Decompression illness Any of a variety of maladies resulting either directly or indirectly from the formation of nitrogen bubbles in tissues or body fluids as a result of inadequately controlled decompression Common...

Page 57: ... 21 oxygen Oxygen partial pressure 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 PO2 Abbreviation for oxygen partial pressure RGBM Abbreviation for Reduced Gradient Bubble Model Reduced Gradient Bubb...

Page 58: ... contents are proprietary to Suunto Oy Suunto Dive Computer Suunto Cobra3 and their logos are registered or unregistered trademarks of Suunto Oy All rights reserved Whilewehavetakengreatcaretoensurethatinformationcontainedinthisdocumentation is both comprehensive and accurate no warranty of accuracy is expressed or implied Its content is subject to change at any time without notice ...

Page 59: ...nties are limited and are subject to the restrictions given in the instruction manual This warranty does not cover the damage to the product resulting from improper usage improper maintenance neglect of care alteration improper battery replacement or unauthorized repair Suunto s dive computers and wristop computers can be registered online at www suunto com Model of Serial Dive Computer number Dat...

Page 60: ...www suunto com Suunto Oy 9 2008 10 2008 11 2008 ...

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