operations manual petrel 1 / petrel 2 - dive computers

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  • Rebreather Controller Model


    Operations ManualPetrel 1 / Petrel 2

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    Shearwater DiveCAN Petrel

    Table of ContentsIntroduction 5

    Models Covered by this Manual 5Feature List 6What is DiveCAN? 7DiveCAN Advantages 8

    Turning On 9Buttons 10The Main Screen 11

    Color Coding 11The Top Row 12The top row shows depth and time information 12The Center Row 14The Bottom Row 15

    Info Screens 17Compass (Petrel 2 only) 22Menus 24

    Menu Structure 25Basic Setup 26Simple Dive Example 27Complex Dive Example 29Decompression and Gradient Factors 33Menu Reference 34

    Turn Off 34Calibration 34

    Calibration Problems 35Switch Setpoint 36Select Gas 37

    Radio Station Gases 37Select Gas Menu Styles 38

    Switch to OC/CC 39Dive Setup+ 39

    Edit Low Setpoint 39Edit High Setpoint 40Define Gas 41Dive Planner+ 43Conservatism 45

  • Shearwater DiveCAN Petrel


    NDL Display 46External PPO2 Monitoring 48Brightness 49

    Setpoint -> 19 49Dive Log Menu 50

    Display Log 50Upload Log 50Edit Log Number 50

    System Setup+ 51Dive Setup52Deco Setup 53OC Gases 53CC Gases 53O2 Setup 54Auto SP (Setpoint) Switch 54Display Setup 55Compass Setup (Petrel 2 only) 57System Setup 59Advanced Configuration 1 60Advanced Configuration 2 61

    Firmware Upload and Dive Log Download 62Changing the Battery 63

    Battery Types 64Tissues Cleared 65Error Displays 66Storage and Maintenance 68Servicing 68Specifications 69FCC Warning 70Industry Canada Warning 70

    Table of Contents (continued)

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    Shearwater DiveCAN Petrel

    WARNINGThis computer has bugs Although we havent found them all yet, they are there It is certain that there are things that this computer does that either we didnt think about, or planned for it to do something different Never risk your life on only one source of information Use a second computer or tables If you choose to make riskier dives, obtain the proper training and work up to them slowly to gain experience

    This computer will fail It is not whether it will fail but when it will fail Do not depend on it Always have a plan on how to handle failures Automatic systems are no substitute for knowledge and training

    No technology will keep you alive Knowledge, skill, and practiced procedures are your best defense (Except for not doing the dive, of course)

    DANGERThis computer is capable of calculating deco stop requirements These calculations are at best a guess of the real physiological decompression requirements Dives requiring staged decompression are substantially more risky than dives that stay well within no-stop limits

    Diving with rebreathers and/or diving mixed gases and/or performing staged decompression dives and/or diving in overhead environments

    greatly increases the risk of scuba diving

    You really are risking your life with this activity

  • Shearwater DiveCAN Petrel


    IntroductionThe Shearwater Petrel is an advanced technical diving computer for open and closed circuit divers

    Although we strive to make the Petrel easy enough to use without reading the manual, please take some time to read this manual to get the best performance from your new computer Diving involves risk and education is your best tool for managing this risk

    Models Covered by this Manual

    This manual provides operating instructions for the Petrel DiveCAN Rebreather Controller model For instructions on the Standalone (SA) and EXT Petrel models, see the document Shearwater Petrel Manual - Standalone and EXT Models

    Petrel 1 vs Petrel 2

    This manual covers both the Petrel 1 and Petrel 2 models The difference between the models is that the Petrel 2 has a digital compass and also supports Bluetooth Smart Ready (ie dual mode Bluetooth supporting both Bluetooth Classic v21 and Bluetooth Smart v40) Bluetooth Smart is used for connecting to iOS devices

    All other features are the same between the Petrel 1 and Petrel 2 Both models use the same firmware file and firmware version number.

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    Shearwater DiveCAN Petrel

    Feature List Depth, time and oxygen sensor display Bhlmann decompression model with gradient factors conservatism Optional VPM-B decompression model Imperial and metric displays DiveCAN communications for robust connections to rebreathers A menu system that adapts to diving status Automatic turn off after 15 minutes on the surface Depth sensor rated to 450 feet/140 meters of seawater Dive Planner Any combination of oxygen, nitrogen, and helium (Air, Nitrox, Trimix) Open and closed circuit, switchable during a dive 5 CC and 5 OC gases Gases can be changed and added during a dive CNS tracking No lockout from violating deco stops Automatic PPO2 set-point switching (configurable) Two PPO2 set-points, each of which can be set between 5 and 15 Flexible user replaceable battery Almost any AA type Tilt compensated digital compass (Petrel 2 only) 1000 hour dive log memory Log downloads and firmware upgrades using Bluetooth

  • Shearwater DiveCAN Petrel


    What is DiveCAN?

    DiveCAN is a digital communications standard developed specifically for rebreathers.

    DiveCAN connections allow rebreather components to communicate

    A minimum configuration has a Control Bus with a handset connected to rebreather electronics ("bus" is a term used to describe the connections between communicating electronic modules)

    Depending on your rebreather, a secondary Monitor Bus may be used This independent bus provides backup PPO2 monitoring in the event of a failure of the primary control bus

    Spare auxiliary ports may be included for additional devices or future expansion Even if your rebreather does not have a spare port, additional devices can be added with the use of Y-cables

    DiveCAN devices connect together using specially designed underwater connectors This allows easy disconnection of devices for upgrades, repair, and travel



    Monitor BusControl Bus



    itor P


    Petrel Handset

    Future Device



    l) Au


    ry Po



    set P




    SOLO(SOLenoid &Oxygenelectronics)



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    Shearwater DiveCAN Petrel

    DiveCAN Advantages

    The DiveCAN standard was designed to improve rebreather electronics It offers the following advantages over the previous generation of analog wiring:

    Robust error-checked communications A message is either received correctly or it isn't Compare this with analog wiring where corrosion or poor connections can result in incorrect data being used

    Upgradable and expandable As new technologies are introduced, they can be plugged into existing rebreathers

    Components (handset, HUD, etc) can be easily removed for travel, repair, backup, and upgrades

    Modular design compartmentalizes critical functions for redundancy For example, the Solenoid and Oxygen electronics (SOLO) can measure and inject oxygen independently of the handset If the handset is unplugged or damaged, the SOLO can continue to control loop PPO2

    The DiveCAN connectors are shown below These connectors are miniature versions of the underwater connectors used in the oil and gas industry They are robust and rated to 2000ft underwater

    Male Connector

    Female Connector

  • Shearwater DiveCAN Petrel


    Turning On

    To turn the Petrel on, press both the MENU (left) and the SELECT (right)

    buttons at the same time

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    Shearwater DiveCAN Petrel

    ButtonsTwo piezo-electric buttons are used to change settings and view menusExcept for turning the Petrel on, all operations are simple single button presses

    Dont worry about remembering all the button rules below Button hints make using the Petrel easy

    MENU button (Left) From main screen: brings up the menu In a menu: moves to the next menu item Editing a setting: changes the settings value

    SELECT button (Right) From main screen: steps through information screens In a menu: performs command or starts editing Editing a setting: saves the settings value

    BOTH BUTTONS When Petrel is off: pressing MENU and SELECT at the same time will turn

    the Petrel on No other operation requires pressing both buttons at the same time

    When in a menu, button hints label each button

    For example, the hints to the right tell us: use MENU to change the brightness value use SELECT to save the current value

    Button Hints

    SELECT (right)button

    MENU (left)button

    MENU hint SELECT hint

  • Shearwater DiveCAN Petrel


    The Main Screen

    The main screen shows the most important information needed for technical diving

    Color Coding

    Color coding of text draws attention to problems or unsafe situations

    White text indicates normal conditions

    YELLOW is used for warnings that are not immediately dangerous but should be addressed

    FLASHING RED is used for critical alerts that could be life threatening if not immediately addressed

    The warning or critical alert states can be determined without the use of color

    Warnings display on a solid inverted background

    Critical alerts flash between inverted and normal text.

    Color Blind Users

    Top RowDepth, Time & Deco Stops

    Center RowPPO2

    Bottom RowMode, Gas &Deco Info

    Warning - doesn't flash

    Critical alert - flashes


    Sample warning -a better gas is available

    Sample critical alert -continuing to breathe this

    gas co

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