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Summary of Contents for Shearwater DiveCAN Petrel 1
- Page 1 Operations Manual Petrel 1 / Petrel 2 ® DiveCAN Rebreather Controller Model...
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Page 2: Table Of Contents
® Shearwater DiveCAN Petrel Table of Contents Introduction ����������������������������������������������������������������������������������������������������������������5 Models Covered by this Manual ������������������������������������������������������������������������������5 Feature List ��������������������������������������������������������������������������������������������������������������6 What is DiveCAN ? �������������������������������������������������������������������������������������������������7 ® DiveCAN Advantages ���������������������������������������������������������������������������������������������8 ® Turning On �����������������������������������������������������������������������������������������������������������������9 Buttons ���������������������������������������������������������������������������������������������������������������������10 The Main Screen ������������������������������������������������������������������������������������������������������11 Color Coding ����������������������������������������������������������������������������������������������������������11 The Top Row ����������������������������������������������������������������������������������������������������������12... - Page 3 ® Shearwater DiveCAN Petrel Table of Contents (continued) NDL Display �������������������������������������������������������������������������������������������������������46 External PPO2 Monitoring ���������������������������������������������������������������������������������48 Brightness ����������������������������������������������������������������������������������������������������������49 Setpoint -> �19 �������������������������������������������������������������������������������������������������������49 Dive Log Menu �������������������������������������������������������������������������������������������������������50 Display Log ��������������������������������������������������������������������������������������������������������50 Upload Log ���������������������������������������������������������������������������������������������������������50 Edit Log Number ������������������������������������������������������������������������������������������������50 System Setup+ ������������������������������������������������������������������������������������������������������51 Dive Setup����������������������������������������������������������������������������������������������������������52 Deco Setup ��������������������������������������������������������������������������������������������������������53...
- Page 4 ® Shearwater DiveCAN Petrel DANGER This 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�...
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Page 5: Introduction
Shearwater DiveCAN Petrel Introduction The 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�... -
Page 6: Feature List
® Shearwater DiveCAN Petrel Feature List • Depth, time and oxygen sensor display • Bühlmann decompression model with gradient factors conservatism • Optional VPM-B decompression model • Imperial and metric displays • DiveCAN communications for robust connections to rebreathers •... -
Page 7: What Is Divecan
® Shearwater DiveCAN Petrel What is DiveCAN ® DiveCAN is a digital communications standard developed specifically for rebreathers. ® Rebreather SOLO OBOE enoid & xygen xygen electronics) lectronics) ® ® Control Bus Monitor Bus DiveCAN DiveCAN Future Device Petrel Handset... -
Page 8: Divecan ® Advantages
® 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�... -
Page 9: Turning
® Shearwater DiveCAN Petrel Turning On To turn the Petrel on, press both the MENU (left) and the SELECT (right) buttons at the same time� DocRevB... -
Page 10: Buttons
® Shearwater DiveCAN Petrel Buttons Two piezo-electric buttons are used to change settings and view menus� Except for turning the Petrel on, all operations are simple single button presses� MENU (left) button SELECT (right) button Don’t worry about remembering all the button rules below� Button hints make using the Petrel easy�... -
Page 11: The Main Screen
® Shearwater DiveCAN Petrel The Main Screen Top Row Depth, Time & Deco Stops Center Row PPO2 Bottom Row Mode, Gas & Deco Info The main screen shows the most important information needed for technical diving� Color Coding Color coding of text draws attention to problems or unsafe Sample warning - situations�... -
Page 12: The Top Row
® Shearwater DiveCAN Petrel The Top Row The top row shows depth and time information� Depth DEPTH Imperial: In feet (no decimal places)� Metric: In meters (displays with 1 decimal place up to 99�9m) in feet DEPTH 69.7 Note: If the depth shows a... - Page 13 ® Shearwater DiveCAN Petrel Stop Depth and Time Stop – The next stop depth in the current units (feet or meters)� STOP TIME This is the shallowest depth to which you can ascend� Time – The time in minutes to hold the stop�...
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Page 14: The Center Row
® Shearwater DiveCAN Petrel The Center Row The center row displays PPO2 as measured from three O2 sensors� PPO2 units are absolute atmospheres (1ata = 1013mbar)� PPO2 Flashes Red when less than 0�40 or greater than 1�6� These limits can be adjusted in the Adv. Config 2 menu. -
Page 15: The Bottom Row
® Shearwater DiveCAN Petrel The Bottom Row The bottom row displays the current mode, gas and decompression information� Circuit Mode The current breathing configuration. One of: OC = Open circuit (bailout so displays in Yellow)� CC = Closed circuit� Current Gas (O2/He) - Page 16 ® Shearwater DiveCAN Petrel GF99: The raw percentage of the Bühlmann allowable GF99 supersaturation at the current depth� @+5: The predicted time-to-surface (TTS) if you were to stay at the current depth for 5 more minutes� Time-to-Surface (TTS) The time-to-surface in minutes� This is the current time to ascend to the surface including the ascent plus all required deco stops�...
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Page 17: Info Screens
® Shearwater DiveCAN Petrel Info Screens Info screens provide additional information that does not fit on the main screen. Info screens display on the bottom row� Press SELECT (right) button to step through the info screens� SELECT button SELECT button SELECT button Starting from the main screen, the SELECT (right) button steps through the info screens�... - Page 18 ® Shearwater DiveCAN Petrel Diluent PPO2 The PPO2 of the currently selected diluent� Not measured DilPPO2 directly, but calculated as the fraction of O2 in the diluent multiplied by the current depth's pressure� Displays in Flashing Red when the PPO2 of the diluent is less than 0�19 or greater than 1�65�...
- Page 19 ® Shearwater DiveCAN Petrel Millivolts MILLIVOLTS 42.O 46.O 43.O The raw millivolt (mV) readings from the PPO2 sensors� Average Depth Displays the average depth of the current dive, updated once per second� When not diving, shows the average depth of the last dive�...
- Page 20 ® Shearwater DiveCAN Petrel Tissues Bar Graph Some Sample Tissues Graphs The tissues bar graph shows the tissue compartment inert gas tissue tensions based on the Bühlmann ZHL-16C model� Note that VPM-B also tracks tensions in the same way� On surface (sat� with air) The fastest tissue compartment is shown on the top, and the slowest on the bottom�...
- Page 21 ® Shearwater DiveCAN Petrel Gradient Factor The deco conservatism value when the deco model is set to GF� The low and high gradient factors control the 3O/85 conservatism of the Bühlmann GF algorithm� See “Clearing up the Confusion About Deep Stops” by Erik Baker�...
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Page 22: Compass (Petrel 2 Only)
® Shearwater DiveCAN Petrel Compass (Petrel 2 only) The Petrel 2 model contains a tilt-compensated digital compass� Compass features: • 1° resolution • ±5° accuracy • Smooth, high-speed refresh rate • User set heading marker with reciprocal • True North (declination) adjustment •... - Page 23 ® Shearwater DiveCAN Petrel Marking a Heading To mark a heading, press MENU (left) button until "Mark Compass" is displayed, then press SELECT (right) button to mark the current direction� The display will then jump back to the compass display� The heading is shown as a pair of green triangles�...
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Page 24: Menus
® Shearwater DiveCAN Petrel Menus Press MENU (left) button to step through the menus� Press SELECT (right) button to execute command or enter sub-menu� Menus display on the bottom row� MENU button SELECT button Petrel Turns Off MENU button SELECT... -
Page 25: Menu Structure
® Shearwater DiveCAN Petrel Menu Structure Main Screen Turn Off Surface only Calibrate Surface Sub-Menus only Switch .7 > 1.3 Dive Planner+ Edit Low SP Conserv. Edit High SP Select Gas NDL Display Define Gas Switch CC > OC Brightness... -
Page 26: Basic Setup
® Shearwater DiveCAN Petrel Basic Setup Before using the computer there are several things that need to be configured. This is not an exhaustive list of the pre-requisites for diving the system, but a suggestion of key tasks� • Calibrate the oxygen sensors if needed� If calibration is not needed, then we recommend verifying the PPO2 at multiple points. -
Page 27: Simple Dive Example
® Shearwater DiveCAN Petrel Simple Dive Example The following is a simple rebreather dive that includes decompression stops� In this example: Diluent: Max Depth: 125 feet for 42 minutes Dive Phase Description Petrel Display The mode is set to CC and the diluent is set to air (21/00)�... - Page 28 ® Shearwater DiveCAN Petrel Simple Dive Example (continued) Dive Phase Description Petrel Display Once the NDL hits 0, deco stops will be needed, which display in the top-right corner� Deco Also, note that the NDL location is now Needed displaying additional info, in this case @+5�...
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Page 29: Complex Dive Example
® Shearwater DiveCAN Petrel Complex Dive Example The following is a more complex rebreather dive that includes multi-gas OC bailout� In this example: Diluent: Trimix (10/50) Bailout gases: 10/50, 21/00, and 50/00 Max Depth: 90 meters for 20 minutes Dive Phase... - Page 30 ® Shearwater DiveCAN Petrel Complex Dive Example (continued) Dive Phase Description Petrel Display If the PPO2 sensors need calibration, follow the instructions from your rebreather manufacturer� On the PPO2 calibration screen, the top row displays the millvolt (mV) reading from each PPO2 sensor�...
- Page 31 ® Shearwater DiveCAN Petrel Complex Dive Example (continued) Dive Phase Description Petrel Display As we descend deeper, the NDL decreases� Decreasing The TTS shows it will take 5 minutes to ascend to the surface at 10m/min (33ft/min)� We have completed the bottom time�...
- Page 32 ® Shearwater DiveCAN Petrel Complex Dive Example (continued) Dive Phase Description Petrel Display After physically switching the BOV or mouthpiece, the computer needs to be set to OC mode for proper deco calculations� Two presses on MENU brings up the "SWITCH CC ->...
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Page 33: Decompression And Gradient Factors
® Shearwater DiveCAN Petrel Decompression and Gradient Factors The basic decompression algorithm used for the computer is Bühlmann ZHL-16C� It has been modified by the use of Gradient Factors that were developed by Erik Baker. We have used his ideas to create our own code to implement it� We would like to give credit to Erik for his work in education about decompression algorithms, but he is in no way responsible for the code we have written�... -
Page 34: Menu Reference
® Shearwater DiveCAN Petrel Menu Reference Turn Off DEPTH TIME STOP TIME The “Turn Off” item puts the computer to sleep� While sleeping, the screen is blank, but the tissue contents are maintained for repetitive .98 .98 .98 diving� The “Turn Off” menu item will not appear during a dive� It will... -
Page 35: Calibration Problems
® Shearwater DiveCAN Petrel Calibration Problems DEPTH TIME STOP TIME One sensor displays FAIL after calibration This could indicate a bad sensor� It has failed because the mV output .98 .97 FAIL was not in range� The sensor could be old or damaged, and should O2/HE be inspected�... -
Page 36: Switch Setpoint
® Shearwater DiveCAN Petrel Switch Setpoint DEPTH TIME SURFACE During a dive the “Switch Setpoint” menu item will be the first item displayed, since the “Turn Off” and “Calibrate” displays are disabled when diving� Switch .7 > 1.3 Pressing SELECT when this menu is displayed changes the PPO2 setpoint from the low setpoint to the high setpoint or vice-versa�... -
Page 37: Select Gas
® Shearwater DiveCAN Petrel Select Gas DEPTH TIME SURFACE This menu item allows you to pick a gas from the gases you have .87 .86 .84 created� The selected gas will be used either as the breathing gas in open circuit mode, or the diluent in closed circuit mode�... -
Page 38: Select Gas Menu Styles
® Shearwater DiveCAN Petrel Select Gas Menu Styles Two styles of Select Gas menus are available, Classic and New� Change between the two styles in the Adv. Config 1 menu. Classic Style Select Gas The classic Select Gas style is as described on the previous page�... -
Page 39: Switch To Oc
® Shearwater DiveCAN Petrel Switch to OC/CC DEPTH TIME SURFACE Depending on the current computer setting, this selection will show as either “Switch CC > OC” or “Switch OC > CC”� Switch CC > OC Pressing SELECT will select the displayed mode for decompression calculations�... -
Page 40: Edit High Setpoint
® Shearwater DiveCAN Petrel DEPTH TIME SURFACE Another press of MENU will increment it again� .85 .86 .84 Edit Low SP O.6 Change Save DEPTH TIME SURFACE If SELECT is pushed, the currently displayed setpoint will be selected, and the display will return to the “Edit Low SP” menu item�... -
Page 41: Define Gas
® Shearwater DiveCAN Petrel Define Gas The function allows you to set up 5 gases in Closed Circuit and 5 DEPTH TIME STOP TIME gases in Open Circuit� You must be in Open Circuit to edit open circuit .85 .86 .84 gases, and you must be in Closed Circuit to edit closed circuit diluents�... - Page 42 ® Shearwater DiveCAN Petrel DEPTH TIME STOP TIME Pushing MENU will continue to increment the gas number� .85 .86 .84 2 OC On 5O/OO Change Save Note: The “A” denotes the active gas� You cannot delete the DEPTH TIME STOP TIME active gas�...
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Page 43: Dive Planner
® Shearwater DiveCAN Petrel Dive Planner+ INTRODUCTION • Calculates decompression profiles for simple dives. • In closed-circuit (CC) mode, also calculates open-circuit (OC) bail-out (BO)� SETUP Uses the current gases programmed into the Petrel, as well as the current GF low/high settings�... - Page 44 ® Shearwater DiveCAN Petrel The Dive Planner does not provide thorough validation of the profile. For example, it does not check for nitrogen narcosis limitations, gas usage limitations, CNS percentage violations, or isobaric counter-diffusion risks due to sudden helium switches� The user is responsible for ensuring a safe profile is followed.
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Page 45: Conservatism
® Shearwater DiveCAN Petrel The final result screen shows the total dive time, the time spent on deco and final CNS%. Results Summary Screen If no decompression is required, no table will be shown� Instead, the total No-Decompression- Limit (NDL) time in minutes, at the given bottom depth will be reported� Also, the gas quantity required to surface (bailout in CC) will be reported�... -
Page 46: Ndl Display
® Shearwater DiveCAN Petrel NDL Display DEPTH TIME STOP TIME The NDL Display option allows you to display four different values .85 .86 .84 during the dive� The display can be changed during the dive to NDL Display NDL provide different information�... - Page 47 ® Shearwater DiveCAN Petrel This number can be used in several ways� First, it can be used to calculate an aggressive ascent that still has some justification in decompression science. For example, if a diver were to lose a significant portion of their gas and needed to get shallow fast, they could ascend until they reached a gradient of 90, then stop until it dropped to 80, then ascend to 90 again, etc�...
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Page 48: External Ppo2 Monitoring
® Shearwater DiveCAN Petrel External PPO2 Monitoring The center row always displays the PPO2 as measured by the three external O2 sensors� This system is plugged into three sensors and using the PPO2 input from the sensors as the system average PPO2 used for decompression calculations and CNS tracking�... -
Page 49: Brightness
® Shearwater DiveCAN Petrel Brightness The display brightness has three fixed brightness settings plus an DEPTH TIME STOP TIME Auto mode� .85 .86 .84 The fixed options are: Brightness Auto • Low: Longest battery life� Exit Edit • Med: Best mix of battery life and readability�... -
Page 50: Dive Log Menu
® Shearwater DiveCAN Petrel Dive Log Menu DEPTH TIME STOP TIME .85 .86 .84 Display Log At the “Display Log” prompt, press SELECT to view the most Dive Log recent dive� The profile of the dive is plotted in blue, with decompression... -
Page 51: System Setup
® Shearwater DiveCAN Petrel System Setup+ DEPTH TIME STOP TIME System Setup contains configuration settings together in a convenient .85 .86 .84 format for updating the configuration before a dive. System Setup+ System setup cannot be accessed during a dive�... -
Page 52: Dive Setup
® Shearwater DiveCAN Petrel Dive Setup The first submenu of System Setup+ is Dive Setup. ‣ Dive Setup High SP Salinity CEIL Salinity Salt Low SP Water type (salinity) affects how the measured pressure is converted to High SP Edit depth�... -
Page 53: Deco Setup
® Shearwater DiveCAN Petrel Deco Setup Deco Model May just show Bühlmann ZHL-16 with gradient factors model, or it ‣ Deco Setup may allow you to switch between GF and various types of VPM-B� The Deco Model choices will be available if you have unlocked VPM-B�... -
Page 54: O2 Setup
® Shearwater DiveCAN Petrel O2 Setup ‣O2 Setup O.98 This menu allows changing settings related to the O2 Sensor Cal. FO2 Giant Sensor Disp calibration and display� Cal. FO2 Next Edit This setting allows you to set the fraction of oxygen (FO2) of the calibration gas�... -
Page 55: Display Setup
® Shearwater DiveCAN Petrel Example: Up: 0�7>1�3 = Auto, Up Depth = 70 ft� Down: 1�3>0�7 = Auto, Down Depth = 41ft Auto SP Switch Auto O.7>1.3 The dives starts at the 0�7 setpoint� As you descend past O7Oft ‣Up Depth 70ft, the setpoint switches “up”... - Page 56 ® Shearwater DiveCAN Petrel Altitude Display Setup The altitude setting when set to ‘Auto’ will compensate for pressure changes when diving at altitude� If all your diving is at sea level, Feet Units then setting this to ‘SeaLvl’ will assume that surface pressure is...
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Page 57: Compass Setup (Petrel 2 Only)
® Shearwater DiveCAN Petrel Compass Setup (Petrel 2 only) Compass View The Compass View setting can be set to: Compass ‣Compass View 9O° • Off: The compass is disabled and the Mark Compass option Calibrate is removed from the menus�... - Page 58 ® Shearwater DiveCAN Petrel Calibrate Compass Calibration of the compass may be needed if the accuracy drifts over time or if a permanent magnet or ferromagnetic metal (e�g� Enable iron or nickel) object is mounted very close to the Petrel� To be ‣Calibrate...
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Page 59: System Setup
® Shearwater DiveCAN Petrel System Setup Date System Setup The first ‘System Setup’ changeable option is ‘Date,’ which allows 14-Aug-2O12 ‣Date O3:28PM Time the user to set the current date� Unlock Load Upgrade Reset to Defaults Time Next Edit The next ‘System Setup’ changeable option is ‘Time’, which allows System Setup the user to set the current time�... -
Page 60: Advanced Configuration 1
® Shearwater DiveCAN Petrel Advanced Configuration 1 Advanced Config Advanced configuration contains items that will be used infrequently and can be ignored by most users� They provide more detailed Enter Adv. Config configurations. Reset Adv. Config System Info Battery Info The first screen allows you to enter the advanced configuration area, or to set the advanced configurations settings to their default. -
Page 61: Advanced Configuration 2
® Shearwater DiveCAN Petrel Advanced Configuration 2 ‣ Adv. Config 2 This section allows changing of PPO2 limits� OC Min. PPO2 O.19 OC Max. PPO2 1.65 Warning: Do not change these values unless you understand the effect� OC Deco PPO2 1.61... -
Page 62: Firmware Upload And Dive Log Download
The Petrel screen will switch from ”Initializing” to “Wait PC” which will have a countdown� Now go back to the Shearwater Desktop� Click start from the open “Update Firmware Box”, or “Download Log.” The PC will then connect to the Petrel, and send the new firmware. -
Page 63: Changing The Battery
A small diagram on the bottom of the Petrel shows the proper orientation. Accepted battery types The Shearwater Petrel can accept a wide variety of AA sized batteries� The Petrel can accept any AA sized (or 14500 size) battery that outputs a voltage between 0�9V and 4�3V�... -
Page 64: Battery Types
® Shearwater DiveCAN Petrel Battery Types After changing the battery, a screen will prompt for the battery type to be entered� The Petrel attempts to guess what type of battery is being used� If the battery type is incorrect, it should be manually edited� Having the battery type set correctly is important so that the Petrel can give low battery warnings at the proper voltage levels�... -
Page 65: Tissues Cleared
® Shearwater DiveCAN Petrel Tissues Cleared Some conditions will cause the decompression inert gas tissue loadings to be cleared� When cleared, the tissues are set to being saturated with breathing air at the current barometric pressure� The Petrel does not lock-out when the tissues are cleared� If the tissues are cleared, then the diver must take appropriate cautions when planning repetitive dives. -
Page 66: Error Displays
® Shearwater DiveCAN Petrel Error Displays The system has several displays that alert an error condition� Limitations of Alarms All alarm systems share common weaknesses� They can alarm when no error condition exists (false positive)� Or they can fail to alarm when a real error condition occurs (false negative)�... - Page 67 Error Confirm UPGRADE RESET This is not an exhaustive list� Please contact Shearwater if you experience any unexpected errors� The center row also shows permanent "Low PPO2" or "High PPO2" messages when the PPO2 is not in a safe range� These message will clear automatically once a safe PPO2 is restored�...
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Page 68: Storage And Maintenance
Do not tighten or remove the faceplate screws� Clean with water ONLY� Any solvents may damage the Petrel dive computer� Service of the Petrel may only be done at Shearwater Research, or by any of our authorized service centers� Your nearest service center can be found at www�shearwaterresearch�com/contact... -
Page 69: Specifications
® Shearwater DiveCAN Petrel Specifications Specification DiveCAN® Rebreather Model Operating Modes Closed Circuit (CC) Open Circuit (OC, for bailout) Decompression Model Bühlmann ZHL-16C with GF VPM-B and VPM-B/GFS (optional) Pressure (depth) sensor Piezo-resistive Range 0 Bar to 14 Bar Accuracy... -
Page 70: Fcc Warning
® Shearwater DiveCAN Petrel FCC Warning a) USA-Federal Communications Commission (FCC) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of FCC Rules� These limits are designed to provide reasonable protection against harmful interference in a residential installation�...
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