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EN
COBRA3
USER’S GUIDE
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Time Tank pressure
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1. WELCOME T O THE WORLD OF SUUNT O DIVING INSTRUMENTS . . . . . . . . . . . . . . . . 5 2. W ARNINGS, CAUTIONS, AND NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3. SUUNT O A T A GLANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1. Navigating in the menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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6.1.5. Safety Stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6.1.6. Decompression dives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6.2. Diving in NITROX mode (DIVEnitrox) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.2.1. Before diving in NITROX mode . . . . . . . .
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1. WELCOME T O THE WORLD OF SUUNT O DIVING INSTRUMENTS Suunto Cobra3 was designed to help you get the most out of your diving. By reading this manual and becoming familiar with the functions of your dive computer , you can begin a new era in your diving. With integrated digital compass, air integration, and 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
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2. W ARNINGS, CAUTIONS, AND NOTES Throughout this manual, important safety icons are displayed. Three classifications are used to separate these icons by their order of importance: W ARNING is used in connection with a procedure or situation that could result in serious injury or death CAUTION is used in connection with a procedure or situation that could result in damage to the device is used to emphasize important information NOTE Before you go on to read the manual itself, it is extremely imp
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W ARNING DIVES THA T REQUIRE DECOMPRESSION ST OPS ARE NOT RECOMMENDED. YOU SHOULD ASCEND AND BEGIN DECOMPRESSION IMMEDIA TEL Y WHEN THE DIVE COMPUTER SHOWS YOU THA T A DECOMPRESSION ST OP IS REQUIRED! Note the blinking ASC TIME symbol and the upward pointing arrow . W ARNING USE BACK-UP INSTRUMENTS! Make sure that you use back-up instrumentation, including a depth gauge, submersible pressure gauge, timer or watch, and have access to decompression tables whenever diving with the dive computer . W
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W ARNING SELECT THE CORRECT AL TITUDE ADJUSTMENT SETTING! When diving at altitudes greater than 300 m/1,000 ft the Altitude Adjustment feature must be correctly selected in order for the computer to calculate the decompression status. The dive computer is not intended for use at altitudes greater than 3,000 m/10,000 ft. Failure to select the correct Altitude Adjustment setting, or diving above the maximum altitude limit will result in erroneous dive and planning data. W ARNING SELECT THE CORRECT
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3. SUUNT O A T A GLANCE 3.1. Navigating in the menus Suunto Cobra3 has four main operating modes - TIME mode (TIME), DIVE mode (DIVE), PLAN mode (PLAN), and MEMOR Y mode (MEMOR Y) – as well as the COMP ASS submode, which can be activated from either TIME or DIVE modes. T o toggle between the main modes, press the MODE button. T o select a submode in DIVE, PLAN and MEMOR Y modes, press the UP/DOWN buttons. 3.2. Button symbols and functions The table below explains the main functions of the dive c
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Symbol Button Press Main functions UP Long Enable gas switching in NITROX mode DOWN Short T oggle between alternative displays Change submode Decrease values DOWN Long Enter Setting mode T oggle between ceiling and remaining air time display 10
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4. GETTING ST ARTED WITH YOUR SUUNT O COBRA3 T o get the most out of your Suunto Cobra3, take some time to personalize it and really make it YOUR computer . Set the correct time and date, as well as the alarms and tones, unit and backlight settings. Then, calibrate and test the compass function. Suunto Cobra3 is a very user-friendly dive computer , and you will quickly become familiar with its functions. Make absolutely sure that you know your computer and have it set up as you want it BEFORE ge
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ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.4. Setting the units In the UNITS SETTING mode you can choose to have the units displayed in either the metric or imperial system - meters/feet, Celsius/Fahrenheit etc. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.5. Setting the backlight Use the BACKLIGHT SETTING mode to turn the backlight on or of f and to define how long it stays on for (5, 10, 20, 30, or 60 seconds). When the backlight is turned of f, it d
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AC APPEARS IN THE TOP RIGHT CORNER OF THE DISPLAY, WHEN THE DIVE COMPUTER IS IN CONTACT WITH WATER. THIS ALSO ACTIVATES THE DIVE MODE. Contamination or dirt on the water contact may prevent this automatic activation. It is therefore important that the water contact is kept clean. The contact can be cleaned with fresh water and a soft brush, for example a tooth brush. 4.3. Learning how to use your compass Suunto Cobra3 integrates a digital compass, which can be used both while diving and on dr
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T able 4.1. Locked bearing symbols Symbol Explanation Y ou are traveling towards the locked bearing Y ou are 90 (or 270) degrees from the locked bearing Y ou are 180 degrees from the locked bearing Y ou are 120 (or 240) degrees from the locked bearing 4.3.3. Compass settings Y ou can define the compass settings ( calibration, declination and time-out) when in COMP ASS mode: Calibration Because of changes in the surrounding magnetic field, the Suunto Cobra3 electronic compass occasionally needs t
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HOLD THE DEVICE LEVEL AND SLOWLY ROTATE 360°. HOLD THE DEVICE STILL AND SLOWLY TILT 90° VERTICALLY. If the calibration fails several times in a row , it is possible that you are in an area with sources of magnetism, such as large metal objects, power lines or electric appliances. Move to another location and try to calibrate the compass again. If the calibration continues to fail, contact an authorized Suunto service center . Declination Y ou can compensate for the dif ference between tru
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5. BEFORE DIVING Do not attempt to use the dive computer without reading this user's manual in its entirety , including all the warnings. Make sure that you fully understand the use, displays, and limitations of the instrument. If you have any questions about the manual or the Suunto Cobra3, please contact your Suunto representative before diving with the dive computer . Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY! When used properly , Suunto Cobra3 is an outstanding tool for as
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5.4. Nitrox Diving with nitrox provides you with an opportunity to increase bottom times or reduce the risk of decompression illness by reducing the nitrogen content in the gas mix. However , when the gas mix is altered, the oxygen content of the mix is generally increased. This increase exposes the diver to an oxygen toxicity risk not usually considered in recreational diving. In order to manage this risk, the dive computer tracks the time and intensity of the oxygen exposure and provides the d
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Alarm type Alarm reason Continuous beep series for 24 seconds or until any Preset alarm time is reached. button is pressed. Current time blinks for one minute T able 5.3. Oxygen alarms in NITROX mode Alarm type Alarm reason Continuous beeps for 3 minutes Set oxygen partial pressure limit is exceeded. The and activated backlight alternative display is replaced with a current blinking PO 2 value. Y ou should immediately ascend above the PO 2 depth limit. OLF value reaches 80%. The OLF value will s
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5.7.1. Connecting Suunto Cobra3 to a regulator When purchasing the Suunto Cobra3, 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 Cobra3 into the HP port of your regulator with your fingers. T ighten th
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ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. NOTE W ith a range of 1 - 999 minutes, the alarm can be set to your planned bottom time, for example. 5.8.3. Setting the nitrox values If set to the NITROX mode, the correct oxygen percentage of the gas in your cylinder (and additional gases) 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 equiv
