Dive Computer
Contents
1. Computer Figure 20 Reset to default 3 DIVE MODE To make the use while diving easier the computer uses an adaptive system Basically when the user is diving the computer allows him to enter only some menus necessary for the dive The computer will show menu items in a logical sequence to let all changes made while diving as fast as possible including gas change During the dive on the main screen the user will see those information e Depth upper left corner Dive Time upper right corner Time below Dive Time when not diving Dive Type currently breathed gas or PPO2 data and selected algorithm middle left Warnings for too fast ascent rate too high Oxygen partial pressure and or CNS gt 80 middle right e No Decompression Limit NDL or Time To Surface TTS lower left corner The o0 symbol means NDL higher than 99 minutes e Stop Time if close to current ceiling value middle low e Stop Depth lower right corner Figure 21 Main Screen in Dive Mode Open Circuit Mix Air No Deco Time 3 minutes ORCA Dive System Diving Computer Manual Version 1 06 English Page 26 Dive System ORCA Dive Computer Figure22 Main Screen in Dive Mode Open Circuit Mix Air No Deco Time more than 99 minutes Figure 23 Main Screen in Dive Mode Open Circuit Mix Air Deco Stop at 6 meters for Iminutes Time To Surface 8 minutes Figure 24 Main Screen in Dive Mode Open Circuit Mix A2. Gradient Factors e VPM B with adjustable critical radius e VPM B Buelhmann This algorithm uses VPM B as main model while Buelhmann ZHL 16B runs in background When stop times and or depths calculated from VPM B are too much different from those obtained from Buelhmann model then the Buelhmann model overrules and sets the decompression profile ASM Adaptive Sigmoidal Model optimizes decompression calculations for repetitive dives ORCA Dive System Diving Computer Manual Version 1 06 English Page 4 Dive System ORCA Dive Computer Deco Stop Settings allows the dive to setup the deco stop steps in three different depth zones Violation control is a particular system that monitors how the diver behaves during the ascent If the diver makes too much errors the computer doesn t anymore calculate the deco profile since the algorithm is no more valid Tissues update rate in dive mode 5 seconds Tissues update rate in sleep mode 1 minute Number of configurable OC mixes 12 Memory 100h diving time Maximum dive time 1999 minutes Intuitive software and adaptive logic Connection to a PC Bluetooth Updatable firmware 100 compatible with the DAN DL7 database of the DSL Battery Standard 3V CR123Trustfire Lithium replaceable by the user O ring size 2 62 x 15 54 NBR 70 shore 1 4 Battery The battery compartment is located on the upper right side of the computer The battery can be replaced by simply u
3. be done exclusively with fresh water ORCA Dive System Diving Computer Manual Version 1 06 English Page 3 Dive System ORCA Dive Computer ensuring to remove all salt deposits The computer must be dried naturally without using any air flows either warm or cold Do not expose the computer directly to sun light or to any heat source above 50 Celsius Store the computer in a dry and fresh place between 5 and 25 Celsius Do not attempt to open the computer nor to modify or repair it on your own Always refer to Dive System for any maintenance that the computer may require Do not use the computer in Hyperbaric chambers The computer has been designed and built so that its measurements have 2 of accuracy European regulations require for the computer to be checked periodically for precision of depth and time measurements The level of precision required by European regulations is 3 5 Do not use 3V rechargeable batteries This batteries have a tension greater then 3 3V and this can damage the electronics Warranty is null and void if back cover is removed 1 3 Technical Specifications Maximum measurable depth 130m Absolute Pressure Measurement Accuracy Temperature range 0 40 C Maximum allowed depth 200m Temperature measurement error max 2 6 C The computer allows you to choose between two different algorithms which can be used in three modes e Buelhmann ZHL 16B with adjustable
4. enabled gases are considered based on the MOD Warning gas mixes 1 2 and 12 are not adjustable Can only be enabled disabled or activated Mix 12 called Dummy Mix is a high inert percentage mix created to simulate the most damaging situation speaking of gas absorption release from tissues When the divers goes diving in Gauge Mode the computer continues calculating in background the inert gases absorption and release based on Dummy Mix Obtained data will be used in case the diver would exit GAUGE mode during the dive to have a repetitive dive using ORCA in Computer Mode and not in Gauge Mode 2 4 2 Dive Settings To enter the Dive Settings submenu you are supposed to enter Menu first Figure 8 Dive Settings The maximum partial pressure can be set from 1 00 bar up to 1 60 bar by 0 05 bar Modifying the maximum set PPO2 affects the MOD calculation See 2 6 Mix Table The submenu SAFETY STOP allows to enable disable the 5 meter safety stop warning at the end of a NDL dive ORCA Dive System Diving Computer Manual Version 1 06 English Page 17 Dive System ORCA Dive Computer The submenu S STOP TIME allows to set the last of the stop from a minimum of 1 minute to a maximum of 30 minutes Using the Next Button it is possible select the value to modify and using the Commit Button it is possible to increase or decrease it The Save amp Exit option allows to save the settings and exit the menu 2
5. 2 LogBook To scroll backward dives press once the Next Button and then press the Commit Button To exit the LogBook mode press the Next Button until Exit appears and then press the Commit Button ORCA Dive System Diving Computer Manual Version 1 06 English Page 19 Dive System ORCA Dive Computer 2 4 5 Dive Planner The dive computer integrates a no stop planner To enter the Planner submenu you are supposed to enter Menu first On the left side of the screen you are supposed to enter the surf time min hour between the two dives and the oxygen fraction of the mix you are going to use In order to start calculation you should enter command Compute by scrolling the menu with Next Button It is possible to scroll the table by the Next page command Figure 20 Planner Warning The displayed no deco times are calculated on the actual tissue saturation level 2 4 6 Deco Stop Allows to set the distance among deco stops basing on depth range STEP 1 regulates distance among stops for the first depth range DEPTH 1 regulates the maximum depth for the first depth range and the beginning of the second range STEP 2 regulates distance among stops for the second depth range DEPTH 2 regulates the maximum depth for the second depth range and the beginning of the third range STEP 3 regulates distance among stops for the third depth range Depth ranges are defined as foll
6. 4 3 Algorithm Settings In this menu the user can set and customize the decompression algorithm The user can choose among three different algorithms Buehlmann VPM VPM Buehlmann If you choose Buehlmann algorithm it is possible to set the High Low and Shape gradient factors Changing the Shape we can obtain an algorithm in which GF gradient factors increase at a faster rate in depth and at a slower rate in surface and viceversa If you choose VPM algorithm it is possible to set the critical radius RO from 0 40 to 1 00 at intervals of 0 02 If you choose VPM Buehlmann it is possible to set the critical radius RO from 0 40 to 1 00 at intervals of 0 02 and the thresh idx from 2 to 2 that regulate the algorithm Buehlmann overview threshold The default value is Q Warning do not modify the algorithm parameters without a proper theoretical background Figure 9 Algorithm Setting Buehlmann Figure 10 Algorithm Setting VPM ORCA Dive System Diving Computer Manual Version 1 06 English Page 18 Dive System ORCA Dive Computer Figure II Algorithm Setting VPM Buehlmann 2 4 4 LogBook In this submenu the user can consult the dives LogBook To enter the LogBook submenu you are supposed to enter Menu first The LogBook stores up to 100 hours of diving For each dive the following data are shown on the screen Dive number Dive date Dive entry time Total dive time Maximum depth Figure 1
7. Dive System ORCA Dive Computer ORCA Dive computer DIVE JIEM f User Manual Version 1 06 English ORCA Dive System Diving Computer Manual Version 1 06 English Page 1 Dive System ORCA Dive Computer INDEX 1 Introduction 1 1 Certifications 1 2 Warnings 1 3 Technical specifications 1 4 Battery 1 6 Computer description 1 7 Pre dive setup 1 8 Flying After Diving 1 9 Algorithms ASM ad Violation Control System 2 Surface Mode 2 1 Menu structure 2 2 Main screen 2 3 Switching off the computer 2 4 Menu 2 4 1 Mix Table 2 4 2 Dive Settings 2 4 3 Algorithm Settings 2 4 4 Logbook 2 4 5 Planner 2 4 6 Deco Stop 2 5 System Settings 2 5 1 Display 2 5 2 Menu Type 2 5 3 PC Mode 2 5 4 Gauge 2 5 5 Date amp Time 2 5 6 Defaults 3 Dive Mode 3 1 Menu structure 3 2 Mix Table 3 3 Algorithm Settings 3 4 Display ORCA Dive System Diving Computer Manual Version 1 06 English Page 2 Dive System ORCA Dive Computer 1 INTRODUCTION Congratulations for purchasing Orca Dive System computer Dive System with its quality products is always with you to warrant comfort safety and enjoyment in diving The Dive System computer you bought is an extremely up to date computer suitable both for recreational and for technical dives The ORCA Dive System computer includes two decompression algorithms that support Air Nitrox Trimix Please check regularly on www divesystem com for updates t
8. LTS EXIT CHAR 1 CHAR 1 CHAR 2 CHAR 2 CHAR 3 CHAR 3 CHAR 4 CHAR 4 CHAR 5 CHAR 5 CHAR 6 CHAR 6 RESET O EXIT MENU 2 2 Main Screen The main screen 1 is divided in 4 sections e Upper left Current depth e Upper right Time o If not diving the current time o If diving the dive time o After a dive current time and dive time e Centre left Selected dive mode o In OC mode the breathed mix o Selected Algorithm e Centre right Warnings o PPO2 high low too high or too low PPO2 values o Vbat low if battery voltage less than 2 7V o Ascent rate when greater than 4 2m min o CNS gt 60 e Bottom centre desaturation time and surface interval when not diving e Bottom centre menu items when navigation button is pressed ORCA Dive System Diving Computer Manual Version 1 06 English Page 13 Dive System ORCA Dive Computer Figure 2 Main Screen 1 Using the Commit Button the main screen 2 will appear In the bottom section of this screen the following information are shown Max PPO2 BAR CNS OTU Ambient pressure when not diving max depth during a dive Figure 3 Main Screen 2 Using the Commit Button once again it is possible to go to the main screen 3 In the bottom section of this screen the following information are shown Men Depth Activated Open Circuit Mix or selected Diluent mix de
9. THM e BUEHLMANN GF HIGH GF HIGH GF LOW GF LOW SHAPE SHAPE O RO O RO e VPM BUEHLMANN O RO O RO O THRESH INDEX O THRESH INDEX SAVE amp EXIT O LOGBOOK EXIT lt previous dive gt next dive gt Last dive lt First dive O PLANNER COMPUTE NEXT PAGE ST HOUR ST HOUR ST MIN ST MIN O2 m C 2 SAVE amp EXIT O DECO STOP This Menu is visible only in ADVANCED MODE STEP 1 STEP 1 DEPTH 1 DEPTH 1 STEP 2 STEP 2 DEPTH 2 DEPTH 2 STEP 3 ORCA Dive System Diving Computer Manual Version 1 06 English Page 11 Dive System ORCA Dive Computer STEP 3 SAVE amp EXIT O EXIT MENU SYSTEM SETTINGS O DISPLAY EXIT CHANGE UNITS MAIN MAIN OFF OFF ON M ON 2 ONTIME ONTIME FLIP SCREEN O MENU TYPE SAVE amp EXIT CHANGE O PC MODE EXIT O GAUGE EXIT TIME START TIMER 30 SEC TIMER 30 SEC TIMER 5 MIN TIMER 5 MIN TIMER 30 MIN TIMER 30 MIN O DATE amp TIME EXIT TIMEZONE TIMEZONE DAY DAY MONTH MONTH YEAR YEAR HOUR HOUR MINUTE ORCA Dive System Diving Computer Manual Version 1 06 English Page 12 Dive System ORCA Dive Computer MINUTE RESET SECONDS O DEFAU
10. TIME ZONE allows to detract 1 hour from the time zone e DAY allows to set the computer date adding one day at a time e DAY allows to set the computer date detracting one day at a time e MONTH allows to set the computer date adding one month at a time e MONTH allows to set the computer date detracting one month at a time e YEAR allows to set the computer date adding one year at a time e YEAR allows to set the computer date detracting one year at a time e HOURS allows to set the computer time adding one hour at a time e HOURS allows to set the computer time detracting one hour at a time e MINUTES allows to set the computer time adding one minute at a time e MINUTES allows to set the computer time detracting one minute at a time e RESET SECONDS allows to reset the seconds to zero for a more accurate time setting On the screen will be even shown information about e Software Version e Computer Serial Number Warning changes in time and date do not affect desaturation calculation 2 5 6 Defaults This menu resets the computer to the default settings To activate the reset the RESET CODE will be required This code matches with the computer s serial numbers Refer to 2 6 5 to know where to find this number Warning All settings will be reset to defaults Warning Tissue saturation data will not be reset ORCA Dive System Diving Computer Manual Version 1 06 English Page 25 Dive System ORCA Dive
11. al radius RO from 0 40 to 1 00 at intervals of 0 02 and the thresh idx from 2 to 2 that regulate the algorithm Buehlmann overview threshold The default value is O Warning do not modify the algorithm parameters without a proper theoretical background Figure 32 Algorithm parameters modification 3 4 Display Even during diving it is possible to change the display settings The Display menu item is the same as the one in surface mode For more details refer to 2 6 1 ORCA Dive System Diving Computer Manual Version 1 06 English Page 32 Dive System ORCA Dive Computer Acronyms and abbreviations used in this manual ASC BL BT CNS DCI DCS OC CCR ft GF GFHigh GFLow He HUD l m MOD NDL Ascend Backlight Bluetooth Central Nervous System Decompression Illness Decompression Sickness Open Circuit Closed Circuit Rebreather feet Gradient Factor Gradient factor High value Gradient factor Low value Helium Head Up Display litres meters Maximum Operating Depth No Decompression Limit Nitrox Oxygen Oxygen Partial Pressure Runtime Semi Closed Circuit Rebreather Setpoint Time To Surface Trimix Coordinate Universal Time Varying Permeability Model ORCA Dive System Diving Computer Manual Version 1 06 English Page 33
12. are Manual for more detailed information about its features and functions To exit the connection mode press once the Commit Button It is possible to connect the Dive System computer to the PC via Bluetooth Warning when the computer is in PC Mode the battery consumption could be increased of the 100 Due to this we suggest not to leave the computer connected to the PC for long time To establish a Bluetooth connection the system will require a PIN code The PIN matches with the dive computer serial number Example Serial Number DS000127 PIN code 000127 Figure 17 PC Connection System requirements for the PC software are e Operating System Windows XP or higher e Memory 256 Mbytes RAM 512 MB RAM recommended e Disk Space At least 100 Mbytes available e Resolution 800x 600 or higher at least 256 colors 2 5 4 GAUGE By selecting the Gauge menu item it is possible to use the dive computer as a simple gauge It is possible to disable the GAUGE Mode during the dive but not enable it or re enable it once in water When you enable it the software will calculate the deco profile based on the Dummy Mix When going back to Computer Mode the Dummy Mix will remain the default mix till when the diver would activate a different mix ORCA Dive System Diving Computer Manual Version 1 06 English Page 23 Dive System ORCA Dive Computer The Gauge screen is divided in 5 zones In the upper part on the left side t
13. can set and customize ORCA Dive System Computer From the main screen is possible to enter this menu pressing the Next Button till Menu appears on the bottom of the screen Press the Commit Button to select the Menu Use the Next Button to browse in the Menu The item will be selected To enter the submenus press the Commit Button Here are shown the item of the Menu ORCA Dive System Diving Computer Manual Version 1 06 English Page l5 Dive System ORCA Dive Computer Figure 6 Menu 2 4 1 Mix Table This is the submenu where the user can set gas mixes for the dive To enter the Mix Table submenu you are supposed to enter Menu first In this table it s possible to define up to 12 gas mixes Each mix could be e ACTIVE It is the gas mix used to start the descent that is the gas currently breathed Only one gas can be activated e ENABLED The enabled mixes are those the diver brings with him during the dive that is the stage or decompression tanks Enabled mixes also affect the TTS calculation e DISABLED Mixes not used during the dive Note it might be useful also to define mixes other divers are using so in case of an emergency these can be enabled during the dive Figure 7 Mix Table Once the mix has been selected with the Commit Button using the Next Button is possible to select which fraction of the gas you would modify The Commit Button allows you to increase or
14. ches itself off when not in dive mode after 15 minutes of inactivity Do not use 3V rechargeable batteries This batteries have a tension greater then 3 3V and this can damage the electronics ORCA Dive System Diving Computer Manual Version 1 06 English Page 6 Dive System ORCA Dive Computer 1 5 Computer Description lt Battery Cap Left button Right button Confirm ed Navigation Screen change Figure 1 Computer Description The computer case is made of highly shock and corrosion resistant marine aluminium The computer s LCD display has a resolution of 128x64 pixels an active area of 33x6lmm and adjustable backlight Special attention has been put in developing a navigation system that let the diver enter the settings in an easy and intuitive way On the dive computer you can see two buttons see figure 1 e The right button also called Next Button allows you to navigate among menus and options e The left button also called Commit Button allows you to confirm the control or modify settings Once you ve selected a specific menu using the Next Button you can enter it using the Commit Button Once you ve selected an item you want to modify you can do it using the Commit Button Navigation is based on a system made of menus and submenus The items of the menu can be scrolled in a circular way just repeatedly pressing one button the Next Button Once on the las
15. cklight o OFF constant display backlight brightness You can set values from 0 to 4 0 means turned off backlight o ON backlight brightness activated by pressing a button values range from 1 to 10 o On Time in this entry the user can set for how many seconds the backlight should remain turned on after pressing a button e In the center on the right side column it is possible to set the contrast of the main LCD screen The FLIP SCREEN submenu allows to rotate the screen display of 180 2 5 2 Menu Type In this submenu it is possible to choose between BASIC or the ADVANCED mode ADVANCED mode enables all Menu section options BASIC mode 1s a simplified mode that shows only the most important options Figure 16 Menu Type Warning Once switched to Basic Mode from Advanced Mode all settings will be reset to fabric defaults 2 5 3 PC Mode In this submenu the user can set the PC connect mode Bluetooth and can establish a connection To enter the PC Mode submenu you are supposed to enter System settings first ORCA Dive System Diving Computer Manual Version 1 06 English Page 22 Dive System ORCA Dive Computer You can connect your dive computer to a PC to setup the computer settings to download data and dive profiles and also to update the computer software In this paragraph you will find some basic information to manage the connection and hardware software specs required for installation Refer to PC Softw
16. decrease oxygen and helium fractions The nitrogen fraction and the MOD Maximum Operating Depth are automatically updated according to the maximum PPO2 set The disabled gases can be enabled and activated during the dive Thanks to this feature it 1s possible to manage some emergencies Before the dive the diver can set his buddy s gas as disabled among his gas table ORCA Dive System Diving Computer Manual Version 1 06 English Page 16 Dive System ORCA Dive Computer While diving in case of emergency such as a malfunction of stage or decompression tank the diver can enable the buddy s gas he wants to use and the computer will automatically update all dive data according to the new enabled gas configuration Warning the TTS Time To Surface is calculated considering all the enabled gases in the Mix table Only the gases the diver brings with him should be enabled When entering a gas or changing the max PPO2 value the MOD of the gas all gases is recalculated MODs are also recalculated each time the computer is powered on This is necessary because the MOD depends on the surface pressure The diving computer assumes a gas as the ideal gas for the current depth based on the MOD using the depth value of current depth minus 1 one meter The correct value of the MOD is important not only to warn the diver letting the gas choosen blinks in case of wrong depth but even for TTS calculation Infact in TTS calculation all
17. delines Current DAN guidelines http www diversalertnetwork org medical fag fag aspx faqid 54 suggest e For a single no decompression dive a minimum preflight surface interval of 12 hours is suggested e For multiple dives per day or multiple days of diving a minimum preflight surface interval of 18 hours is suggested e For dives requiring decompression stops there is little evidence on which to base a recommendation and a preflight surface interval substantially longer than 18 hours appears prudent These indications can change depending on new studies and researches Due to this the information written above can be obsolete in the moment you re reading this manual So always refer to most updated guidelines published on DAN web site if different from the above ORCA Dive System Diving Computer Manual Version 1 06 English Page 8 Dive System ORCA Dive Computer 1 8 Algorithms ASM and Violation Control System The ORCA Dive Computer mounts two decompression algorithms Buehlmann and VPM Varying Permeability Model which could work in three different modes The Buehlmann algorithm which is implemented in the ORCA dive computer is a derivative of the Buehlmann ZHL16B updated with the latest results in medical studies When Buehlmann algorithm is selected it is possible to setup the Gradient Factors High and Low which are responsible for the conservatism settings and the first stop depth and the Shape Factor
18. e computer and with factory default settings An excessive use of the backlight and of the Bluetooth module may significantly reduce the battery life It 1s suggested to replace the battery when the tension displayed 1s 2 75V When the battery tension is insufficient the computer displays a visual alert Warning when diving in particularly cold water the battery tension may decrease of a value up to 0 3V especially if the battery has been used for half or more of its life time Therefore it is suggested to replace the battery before diving in extreme conditions Warning in case of low voltage the maximum screen backlight and contrast are limited lt 2 8V The OFF value of the backlight is set to 0 the ON value is limited to a max value of 5 the LCD contrast is limited to a max value of 5 lt 2 75V The OFF value of the backlight is set to 0 the ON value is limited to a max value of 3 the LCD contrast is limited to a max value of 5 lt 2 7V Backlight values are set to 0 These settings allow a proper functioning for the remaining dive time It is highly recommended to replace the battery at the end of the dive After the installation of a new battery it 1s important to check that all data in the computer have not been accidentally deleted Warning after installing a fresh battery all tissue data are reset So it is mandatory to no change the battery in between repetitive dives To reduce battery consumption the computer swit
19. eased so the dive profile graph would not be updated CNS is increased during the dive and decreased during surface interval In Open Circuit On Off gassing is calculated basing on the selected gas and TTS is calculated basing on the tissue loadings and the enabled gases ORCA Dive System Diving Computer Manual Version 1 06 English Page 28 Dive System ORCA Dive Computer Warning during hard dives because slower update of the deco information due to a higher calculation charge the display of the deco data may be alternated with the NDL symbol 3 1 Menu Structure e MIX TABLE Next Mix Enable Disable Disable is not selectable for the active mix Set Active when mix 1s enabled Save amp Exit OOOO e ALGORITHMS Depending on the choosen model O BUHLMANN GF High GF High GF Low GF Low RO u RO O VPM BUHLMANN RO m RO Thresh Index Thresh Index O Save amp Exit e DISPLAY O Save amp Exit Change Units Main Main Off Ontime Ontime Flip Screen OOO COO OOOO 3 2 Mix Table Thanks to an algorithm based on intuitive logic the computer will suggest the diver the best mix for the current depth choosing among a set of mixes proposing it as first of enabled gases ORCA Dive System Diving Computer Manual Version 1 06 English Page 29 Dive System ORCA Dive Computer Obviously Mix Table has to be properly s
20. et before each dive as described in the paragraph 2 5 Decompression data are calculated according to the enabled gases set by the diver before diving During the dive the diver is warned highlighting the breathed gas when the switch gas depth 1s reached When the current gas is not the ideal one for the current depth the computer will display the current breathing gas flashing Calculation of the ideal gas is based on Maximum Operating Depth MOD which depends on the oxygen fraction and maximum allowed PPO2 only To select the suggested gas press Next Button and then Commit Button to enter mix change menu To activate the suggested mix just press again the Commit Button To enter the Mix Table menu during the dive just browse with the Next Button till you reach the Mix Table menu To confirm press Commit Button In this menu it is possible to change the mix Figure 28 Main Screen Dive Mode Change Mix Warning Mix Table Menu Figure 29 Mix Change Screen Suggested Mix NX50 ORCA Dive System Diving Computer Manual Version 1 06 English Page 30 Dive System ORCA Dive Computer Figure 30 Change Mix Screen Suggested Mix NX50 Figure 31 Mix Table in Dive mode Warning it is highly recommended to first change regulator and then set the gas change on the computer To select a different gas just browse till Mix Table menu item and enter the submenu by pressing the Com
21. he actual depth is displayed In the lower part on the left side the dive time In the center the actual temperature In the upper part on the right side the maximum reached depth In the lower part on the right side a user controllable timer The TIMER START entry will start the timer while the TIMER STOP entry will stop it Before starting the timer it 1s possible to set the countdown starting value e TIMER 30 SEC increases the timer of 30 seconds e TIMER 30 SEC decreases the timer of 30 seconds e TIMER 5 MIN increases the timer of 5 minutes e TIMER 5 MIN decreases the timer of 5 minutes Figure 18 Gauge 2 5 5 Date amp Time In this submenu the user can verify the ORCA dive computer s serial number the software version and to adjust the computer date and time To enter the Date amp Time submenu you are supposed to enter System Settings first Figure 19 Date amp Time In this menu it is possible to set the Time Zone as regards to UTC Coordinated Universal Time Date and Time using the Next Button to select the item to modify and the Commit Button to increase or decrease the selected item Changing the Tim ORCA Dive System Diving Computer Manual Version 1 06 English Page 24 Dive System ORCA Dive Computer e Zone allows to manage the differences due to the time zone for divers travelling through different time zones e TIME ZONE allows to add 1 hour to the time zone e
22. he controlled parameters are ascent rate omitted deco stops and effective deco stop times Each error typology is evaluated in a different way The algorithm hold memory of the committed errors once these errors are too much or are to heavy the Violation Control Systems stops the deco profile calculations advising the diver to use the tables Warning the conservatism parameters of the decompression algorithms should be modified only if you have the necessary theoretical background Dive System is not responsible for damages to people due to erroneous setup of those parameters 2 SURFACE MODE Most of the menu items listed below are only selectable on the surface In dive mode the computer changes automatically enabling only the menu items needed while diving for an easiest computer use during the dive 2 1 Menu Structure In this paragraph all menus and sub menus accessible in surface mode are listed e OFF e MENU O MIX TABLE NEXT MIX O2 u 2 He m He ENABLE DISABLE Disable is not selectable for the active gas SET ACTIVE When mix is enabled SAVE amp EXIT O DIVE SETTING PPO2 MAX PPO2 MAX CHANGE SAFETY STOP YES NO SAFETY STOP TIME SAFETY STOP TIME SAVE amp EXIT ORCA Dive System Diving Computer Manual Version 1 06 English Page 10 Dive System ORCA Dive Computer O ALGORITHM SETTING This Menu is visible only n ADVANCED MODE CHANGE ALGORI
23. ied with the parameter Thresh Idx the computer will switch to the Buehlmann ZHL16B decompression profile The ASM Adaptive Sigmoidal Model is integrated in all decompression algorithms This model enhances the decompression calculations by optimizing repetitive dives deco profiles maintaining however a high safety level The integration of this model is particularly important when performing more dives a day for different consecutive days In repetitive dives with a surface interval shorter than two hours the ASM has a higher effect on decompression time in the following dive The Violation Control System is responsible of monitoring 1n an intelligent and dynamic way the validity constrains of the decompression algorithms When the constrains are no more valid due to a sequence of errors committed by the diver the decompression profile calculated by the algorithm is no more correct the computer advices the diver to use the tables by switching the display between a visual warning USE TABLE and the calculated remaining decompression time and stops working for 24 hours after reached the surface During the no work time the computer ORCA Dive System Diving Computer Manual Version 1 06 English Page 9 Dive System ORCA Dive Computer displays DO NOT DIVE It is highly recommended to avoid any dive in order to avoid MDD risks This system is based on an algorithm which monitors the behavior of the diver during his ascent t
24. ir Deco Stop at 6 meters for 1 minute Time to Surface 5 minutes Mix Change Warning Figure 25 Mix Change Suggested Mix EAN50 ORCA Dive System Diving Computer Manual Version 1 06 English Page 27 Dive System ORCA Dive Computer Figure 26 Main Screen in Dive Mode Open Circuit Mix Trimix 18 45 Deco Stop at 30 meters for 1 minute Time to Surface415 minutes From the main screen it is possible to scroll forward to see more information just pressing the Commit Button While diving it is even possible to see the current dive profile To enter the profile screen press several times the Commit Button Using the Next Button it is possible to enter the Menu items The Menu items are shown in the lower portion of the display The available menu items and the sequence in which they are shown as previously specified depends on the kind of dive the user 1s having Figure 27 Dive Profile Once surfaced the computer remains in post dive mode for 10 minutes during which it 1s possible to enter only the menus available during the dive The total dive time of the last dive is shown in the upper right corner just below the current time If the diver submerges again before ten minutes have passed the computer will consider the new dive as a prosecution of the previous one It is not possible to switch off the computer during 10 minutes after surfacing In post dive mode Run Time RT could not be incr
25. mit Button When the intended gas appears among selected gas enable the gas if disabled or activate it if already enabled Warning the computer allows to enable a gas previously disabled to manage emergencies or a simple oversight For example a failure in the first or second stage of a decompression tank can occur Thanks to this feature the diver can disable the no more available gas and enable the buddy s bailout gas to use it during decompression Warning each time the diver enables or disables a gas this change will affect TTS calculation Warning TTS calculation is made according to the gases the divers has with him during the dive therefore according to the enabled gases in the Mix Table ORCA Dive System Diving Computer Manual Version 1 06 English Page 31 Dive System ORCA Dive Computer 3 3 Algorithm Settings In this menu the user can customize the decompression algorithm User cannot change algorithm during the dive If before diving you have chosen Buehlmann algorithm it 1s possible to set the High Low Gradient Factors and its Shape Changing the Shape we can obtain an algorithm in which GF gradient factors increase at a faster rate in depth and at a slower rate in surface and vice versa If before diving you have chosen VPM algorithm it is possible to set the critical radius RO from 0 40 to 1 00 at intervals of 0 02 If before diving you have chosen VPM Buehlmann it is possible to set the critic
26. o this manual 1 1 Certifications The computer hardware is certified in Europe both as CE and EN13319 1 2 Warnings Please make sure to fully read this user manual before using the ORCA Dive System computer Any inappropriate use of the computer and or of its accessories will make the warranty void and can cause permanent damage to the computer itself and to its accessories The Dive System computer is an auxiliary tool for diving therefore it remains mandatory to carry with you the correct tables to properly plan your decompression phase in case of a malfunction Dive computer DO NOT replace a proper dive training and should be used only by correctly trained divers Diving activity has inherent risks that can t be completely avoided No computer nor dive table can avoid the risk of Decompression Illness DCI Central Nervous System Oxygen toxicity even if the diver carefully and correctly follows the dive plan shown by the computer or obtained using dive tables The computer is not able to consider individual physiological variations that can be different day by day Due to this it is highly recommended to use the device in a conservative and precautionary way keeping within the limits shown by the computer itself to minimize the risk of DCI and Central Nervous System Oxygen Toxicity The diving computer must be kept clean and dry when not in use Do not expose it to chemical agents including alcohol Cleaning of the computer should
27. ows e First range starts at Om meters and ends at the depth set in DEPTH 1 e Second range starts at depth defined in DEPTH 1 and ends at the depth set in DEPTH 2 e Third range starts at the depth defined in DEPTH 2 and ends at max reached depth ORCA Dive System Diving Computer Manual Version 1 06 English Page 20 Dive System ORCA Dive Computer Figure 13 Deco Stop 2 5 System Settings In this menu it 1s possible to set some computer and its accessories features It allows to define the screen characteristics the kind of menu basic or advanced the PC interface system Gauge Mode activation and customization date and time setting and to reset the computer to default Figure 14 System Settings 2 5 1 Display In this submenu the user can set LCD HUD settings and Measurement Unit To enter the Display submenu you are supposed to enter Menu first Figure 15 Display This menu is available even during the dive ORCA Dive System Diving Computer Manual Version 1 06 English Page 21 Dive System ORCA Dive Computer Using the Next Button it is possible to select the value to modify and with the Commit Button increase or decrease the selected value The Display settings screen is divided in three zones e In the upper part you may chose between Metric system meters C or Imperial system feet F e In the center on the left side column it is possible to set the LCD ba
28. pendent on dive mode Battery voltage Current temperature Figure 4 Main Screen 3 ORCA Dive System Diving Computer Manual Version 1 06 English Page 14 Dive System ORCA Dive Computer Keeping on pressing the Commit Button when not in dive mode you ll reach again the main screen During diving the dive profile is shown After 20 seconds regardless of displaying the main screen 2 the main screen 3 or the dive profile the computer will go back to the main screen 1 From the main screen 1 you can also enter the Menu using the Next Button To enter just press the Commit Button 2 3 Power Off From the main screen it is possible to power off the computer pressing the Next Button till the item OFF appears on the lower part of the screen Then press the Commit Button to confirm Figure 5 OFF Menu The computer cannot be powered off while diving After surfacing the computer remains in stand by dive mode for a total time of 10 minutes Within this time another dive will not be considered and logged as a new dive but added to the previous one In this period of time it s not possible to power off the computer and it will be possible to access to menus available during the dive If the depth is less than meter the divetime is stopped The computer is never actually powered off but enters sleep mode It continues updating tissues data 2 4 Menu The Menu screen is where the user
29. sing the delrin coin to open the battery cap The battery cap is protected by two O rings that should be replaced every five battery replacements or if they show any sign of deterioration Before removing the battery please shout off the computer correctly Before closing the battery cap the O rings should be checked cleaned and lubricated with marine grease paying special attention to not leave the O rings dirty and moreover check that the battery spring is in the cap The battery should move freely in the cap If battery is not free to move in the cap this could mean that the battery coating is too tick and may lead to power supply problems during the dive Warning in factory we put a special conductive grease on the screw thread to improve the electrical contact and to prevent corrosion The conductive grease grey coloured is hardly removable ORCA Dive System Diving Computer Manual Version 1 06 English Page 5 Dive System ORCA Dive Computer Warning It is also important to insert the battery in the correct direction and with the correct polarity The positive pole is located in the innermost part of the battery compartment The computer is supplied with a lithium battery R123A Trustfire 3 0V 1300mAh The battery life is 90h of dive time The battery life with the computer switched off can reach 1 year The battery life is guaranteed only when batteries used have compatible specifications to the one supplied with th
30. t menu item one more push will bring you on the first menu item ORCA Dive System Diving Computer Manual Version 1 06 English Page 7 Dive System ORCA Dive Computer Once you ve found the item you re looking for you can enter that part using the Commit Button the left button From the main screen if there s no menu displayed it is possible to switch to next screens just pressing the Commit Button Warning in most menu to let changes be effective it is necessary to confirm each change navigate with Next Button till Save amp Exit appears Then press the Commit Button In some menu changes will be effective immediately without any confirmation required In this case only Exit will be displayed Selecting it will let you exit from the menu 1 6 Pre dive Setup The computer is supplied with factory default settings to allow recreational dives that is dives up to 40 meters within No Decompression Limits and without decompression gases Before performing technical dives setup and enable the gas mixes that will be used while diving by changing the settings in the Mix Table Warning while diving you could enable or disable each gas set in the table but you cannot change mixes composition The computer powers on automatically at the start of a dive if exposed to a 1 1 bar pressure for more than 4 seconds 1 7 Flying After Diving Dive System recommend to follow DAN flying after dive gui
31. which sets up the interpolation type of the two Gradient Factors The Shape Factor is expressed in percentage e 50 value default corresponds to a linear interpolation of the two Gradient Factors this means that the change of the gradients 1s linear with depth e A shape factor value lower than the 50 corresponds to a second order interpolation this means that the two gradient factors a linked by a convex curve In this case Gradient Factors vary slowly in depth and faster in shallower water e A shape factor value higher than the 50 corresponds to a second order interpolation this means that the two gradient factors a linked by a concave curve In this case Gradient Factors vary faster in depth and slower in shallower water The VPM Varying Permeability Model implemented on the ORCA dive computer is the VPM B which integrates the latest modifications done by Baker The decompression calculations of the VPM are based even on the presence and formation of microbubbles in the tissues It is possible to act on the conservatism of the algorithm by setting the critical bubble radius RO which is unique both for Nitrogen and Helium The third algorithm is a combination of VPM assisted by Buehlmann ZHLI6B which is named VPM BUL or V b In this mode the main decompression algorithm is VPM however in background Buehlmann is running If during the ascent the difference on the stop depth or stop times are much more different as the tolerance specif
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