Dive Computer User Manual Liquivision Products, Inc -1
Contents
1. by entering the EMERGENCY gt Lost Gas underwater submenu This gas will then no longer be suggested as a Best Gas and will not be used in calculating your ascent schedule You should use this option when you actually lose a specified gas and do not expect to be able to use it on your ascent You can still access this gas by choosing Show All in the Change Gas underwater menu 4 Decompression Planning Your XEO runs the well documented and BuhImann ZH L16C algorithmi with optional Bias Factors available as a method of adding additional conservatism It consists of three parts e Actual decompression planning these calculations run continuously including while you dive stay at the surface put your XEO to sleep and so on and their purpose is To track your current inert gas and oxygen saturation Also while you are diving these calculations compute your ascent schedule based on the theoretical BUhlmann1 model Your ascent schedule information is displayed on your dive screen as Time To Surface No Decompression Limit Deepest Stop etc e Simulated decompression planning these calculations only occur when you run Simulate Dive on your XEO The Dive Simulator starts with your actual inert gas and oxygen saturation but after that it tracks your simulated inert gas and oxygen saturation Also it follows the pressure implied by the dive simulation and not the actual ambient pressure around you After the simulated dive is fin2. Low setpoint during your bottom phase your XEO assumes that after you start your ascent you will manually switch to High e When your depth on the schedule becomes equal or less than the On Ascent value the setpoint on your schedule will be changed to Low If you choose your Auto Switch to be On if will switch your setpoint to e High if your current setpoint is Low but not any custom setpoint and the depth you are at is more than or equal to the On Descent depth e Low if your current setpoint is High again not any custom setpoint and the depth you are at is less than or equal to the On Ascent depth 3 Gas settings In the Gases submenu you can configure up to 10 different gases to be used during your dives For each of these gases you can specify the following oxygen content helium content as well as a Mode The Mode setting defines how you plan to use this gas during the dive Available modes are Dive Deco Backup Liquivision Products Inc 17 Xeo Manual LIQUIVISION XEO Dive Computer UserManual Setting a gas to Off means that you do not plan to use this gas at all during your current dive but it gives you the option to easily turn it On in the future The other gas modes are described below together with few other labels XEO uses with respect to gases Best Gas your XEO uses a Best Gas concept to determine the gas you ought to be breathing at
3. Time 3 1 1 1 3 4 Ascent Rate 5 11 3 Speed 3 1 1 1 3 5 Descent Rate 5 11 4 Start 3 1 1 1 4 Deco Settings 6 Preferences 3 1 1 1 4 1 GF L H 6 1 Units 3 1 1 1 4 2 PO2 Dive 6 2 Log Period 3 1 1 1 4 3 PO2 Deco 6 2 1 Tap Sens 3 1 1 1 4 4 Min PO2 6 2 2 Tap Count 3 1 1 1 4 5 Max END 6 2 3 Min dive 3 1 1 1 4 6 Last deco 6 2 4 Min SI stops 6 2 5 Status SLLLS Your 6 2 6 Battery Type Saturation 6 2 6 1 White ER144335M 3 1 1 1 6 Simulate Dive 6 2 6 2 Blue ER17335M 3 1 1 1 6 1 Depth 6 2 6 3 Green ICR1340 3 1 1 1 6 2 Time 6 2 7 Battery Meter 3 1 1 1 6 3 Speed 6 2 7 1 Symbol 3 1 1 1 6 4 Start 62 12 Volts 3 1 1 1 6 5 Cancel 6 2 8 Battery Test SL GER SURE AR UNIT 7 Salinity 3 1 1 2 2 Low SP 8 Time Date 31 123 High SP 8 1 12h 24h 3 1 1 2 4 Auto Switch 8 2 Time Jdel On Descent 8 3 Date 3 1 1 2 6 On Ascent 8 4 Year 4 Dive Log 8 5 Calibrate Time 5 Display Settings 9 Connect to PC 5 1 Brightness 10 Exit XEO Manual LIQUIVISION XEO Dive Computer UserManval USER AGREEMENT AND WARRANTY Please go download our user agreement and warranty hitp liquivision com XEO_manuals ohp You must accept the User Agreement and Warranty in order to active the software and begin using your product If you do not you must return your Unused product within 30 days GETTING STARTED BEFORE DIVING THE XEO Turning the XEO on off To turn the unit on simply install a new or charged battery and tap on the top three times To
4. You can either confirm the default 100 100 setting B hlmann ZH L16C algorithm or modify the numbers to increase conservatism The factors are listed in the sequence Low High Low represents the factor at the deepest decompression stop and High represents the factor at the surface Both factors can range from 0 100 although Low must be less than or equal to High 3 62 PO2 dive Here you can setup the maximum PO2 for your Dive Gas This will define how deep your Dive Gas will still be considered breathable 3 63 PO2 deco Here you configure the maximum PO2 for your Deco Gas This will define how deep your Deco Gas will still be considered breathable 3 64 Min PO2 Here you configure the minimum PO2 for any of your gases This will define how shallow your gases will still be considered breathable 3 65 Max END Liquivision Products Inc 1O Xeo Manual LIQUIVISION XEO Dive Computer UserManval Here you configure the maximum END Equivalent Narcotic Depth for any of your gases This will define how deep your gases will still be considered breathable Your XEO assumes that oxygen Is also narcotic therefore the END for nitrox mixes will be the same as the END of air Only helium can reduce the END of a gas 3 66 Last deco stops In this submenu you can define a set of Last Deco Stops As a default XEO will compute deco schedule so that the last deco stop is 3m 10ft then 6m 20ft 9m 30ft etc Here you can configure your o
5. turn the XEO off select Shut Off from the main menu Register Your Unit Activate Your Dive Software To register your unit you must visit http www ligquivision com activate ohp Before registration you can navigate through your unit s menus but it is not ready to dive You will see the Unit is locked screen below left Once you enter your information and agree to our User Agreement and Warranty you will be given a PIN number Once you select the Enter PIN option you will be able to type this PIN into your unit by tapping up and down on the XEO Setup Time Date amp Battery Type Gradient Factors Once you have registered and unlocked your XEO unit the main screen will still say NOT Ready to Dive Edit Your GFs Time Date Battery Type This information must be entered before the unit is dive ready To do this go to date time on the main menu You will also need to set the battery to the type you are using Please go to preferences and select battery type to select the correct battery Battery types and names are below ER 17335M J LFP1Z3A1CRI6340 1700mah fsaoman 650mAh Blue White Green Liquivision Products Inc 6 Xeo Manual LIQUIVISION XEO Dive Computer User Manual GETTING STARTED FEATURES OF THE XEO Battery Compartment Color OLED Display Front Bungee Holes Front Strap Holes Infra Red Aperture for connection to PC Interface Serial Nu
6. Following this information does not guarantee that you will avoid decompression sickness 3 7 Simulate Dive This option is here so you can experiment with ascent schedule calculations gas switches emergency modes etc without getting yourself or your XEO wet When you enter Simulation it will open sub menu asking you for depth and time of the dive its speed and then you can select Start Liquivision Products Inc 1 Xeo Manual LIQUIVISION XEO Dive Computer UserManual 4 Dive Log The Dive Log keeps track of dives you did with your XEO including their depth and temperature profiles With use of a XEO PC Interface and related software you can download this information to your desktop or laptop When you review downloaded dives you will also be able to see the pressure profile of any tanks that were being monitored during the dive The number of dives recorded by the Dive Log depends on the Log Period you select The default setting is 10 seconds and on this setting you will be able to record approximately 1500 hours of dive time with one tank 5 Connect to PC Tap into this menu item before starting the download of your dive logs in your PC application of choice Refer to its manual for more information If you tap into this item accidentally don t worry the wait for PC communication will time out after 30 seconds and you will be back to main menu Note that you don t have to select this option to update your fi
7. a specific depth both during Dive Planning and during Auto Switching while diving To determine the Best Gas your XEO first reviews all the Dive and Deco gases you have set up for this dive with the exception of any Lost gases Then it chooses a subset of gases that are breathable at this depth based on your min max PO2 END settings Finally it chooses one that has the highest content of oxygen among those gases that is your Best Gas Default Gas the gas you set as Default is the gas your XEO will assume you are breathing the moment you begin the dive You can later switch to other gases during your dive Default Gas Rules Only one gas can be configured as the Default Gas There always has to be a Default Gas The Default Gas will always be a Dive Gas If you remove a Default Gas or change its mode from Dive Gas to Deco Backup or Off the Default setting will be passed to the first Dive Gas on the list of gases If there is no such gas configured it will be passed to first gas on the list and its mode will be changed to Dive Gas If you are in CCR mode the Default Gas will be your diluent and it will be impossible to switch diluent while diving Dive Gas Dive Gases will be available for switches during the dive and will be used in ascent schedule calculation Their maximum PO2 is determined by the PO2 dive menu item Deco Gas Deco Gases
8. will be available for switches during the dive and will be used in ascent schedule calculation Their maximum PO2 is determined by PO2 deco menu Item Backup Gas Backup Gases will be available for switches during the dive after choosing option Show All in the Change Gas underwater menu A Backup Gas will be used in ascent schedule calculation only after you switch into it and only until your ascent schedule reaches a depth where it can switch to another Dive or Deco gas You can alter this by marking some of Dive or Deco Gases as Lost see below A typical example of Backup Gases would be to configure the Gases your dive buddy is taking but that you don t have That way you can quickly switch into them in an emergency Custom Gas you can configure a Custom Gas during your dive via the Change Gas underwater menu It can take a lot of time to configure a Custom Gas underwater so we urge you to avoid it as much as possible by pre configuring any gases you may want to use on the surface before your dive A Custom Gas will be used in ascent schedule calculation only after you switch into it and only until your ascent schedule reaches a depth where it can switch to some other Dive or Deco gas You can alter this by marking some of Dive or Deco Gases as Lost see below Liquivision Products Inc 18 Xeo Manual LIQUIVISION XEO Dive Computer UserManual Lost Gas you can mark any of your Dive or Deco gases as Lost
9. E EE T E E E 14 SHOP WV GTE eea E EEE em emcee E memes 15 MEI Eie N E E EE NET RE ee ee eee 15 DIVING WITH YOUR XEO IN DECO MODE Ee GE esa aE iS oe oe ed 16 B Ad ei ie AE N 16 Settings That Will Affect Your Deco PAN ee ee ee ee ee ee 16 Liquivision Products Inc 2 XEO Manual LIQUIVISION XEO Dive Computer UserManval SSN EE EE OR N OE EE 17 Decompression PIANNING ees ee ASSESSEER DE Ge DE Ge DOE EG Ge EN es Ge EG GE eN ds 19 Gradient Factors Le 20 Oxygen IOAANE RE EEE EE 20 Entering the Waler senn 21 DIET 11 21 DENG 21 DED EE EO see EE NE 21 Maximum Depth 000 0c ee ee ee ee ee ee ee ee ee 22 Decompression Information Zone ee ee ee ee ee ee 22 VES ogee oir OE N Ee 22 GaS ON SOT OU EE 23 GOSA MS enn E EE ON E E E T E E E ee 23 Ree aaa EAEE E EE EAE EEA 24 OTRO VCC AT sss EE noria ena A ER nainii 24 F ilind lie VNR ann oe A AE AEO EA 24 Te NNN enn 25 Altitude Compensation Surface Pressure Adjustments 25 DIVING WITH YOUR XEO IN GAUGE MODE sees ee ese ee ee ee ee ee ee ee ee ee ee Re Re ee 26 Entering NE Wale ED ie ok ee GP ee ens 26 Dive BL o h Aas 27 DETTE Le 27 Dem 7 EO es cs cee osc EE OE NE 28 SH WS Oa EEE EE OE EE OE ON ie 28 Aveidde DEDI Ee N ee oe ie ER ee oe EE GO ee Gee 28 161 11 1 ALL Le ede io EEE 29 Banery SVIE NE 29 FINE VU EE ER EE N EE EE OE 29 Altitude Compensation Surface Pressure Adjustments 29 AEO PEINTER EN 30 NRF NENNE 30 Liquivision Products Inc 3 XEO Manual L
10. IQUIVISION XEO Dive Computer UserManval IMPORTANT NOTICES Abbreviated Manual This manual is a shortened version of the manual for quick setup and reference For the full detailed user s manual please visit http liquivision com docs Xeo User Manual pdf WARNING DANGERS OF DIVING Scuba diving is a dangerous sport and can lead to injury disability or death Always dive within the limits of your training skills and experience Technical diving activities including decompression diving mixed gas diving rebreather diving wreck and cave diving all substantially increase the risks of scuba diving The XEO dive computer is capable of calculating decompression requirements based on the BUhlmann ZH L16C algorithm first published in 19901 Decompression is an inexact science It is possible to follow a decompression plan exactly and still suffer decompression sickness Following a decompression plan does not in any way guarantee the avoidance of decompression sickness The same profile that gets you out of the water safely one day may cause decompression sickness another day and lead to temporary or permanent injury or death You can die while diving WARNING ELECTRONICS CAN FAIL ALWAYS CARRY BACKUP The XEO dive computer hardware like any electronic equipment whose Components mature and age If they fail during your dive they can stop providing you with critical information You must have a plan to handle the failure of th
11. IVISION XEO Dive Computer UserManval If you exceed your CNS limit during the dive you will see a Gas Alarm noting it the blinking red PO2 label on the screen 7 Entering the water Turning Your XEO On We recommend that you turn your XEO on yourself before you enter the water to check the remaining battery power and to make sure that all is functioning properly You can turn it on by tapping the unit in the Down direction 3 5 times Otherwise if will turn on automatically few seconds after you take it deeper than 1 6 meters 5 25 feet Beginning Your Dive When you start to descend and go below 1 6 meters 5 25 feet your XEO will turn into dive mode 8 Dive Display Currently there is a single underwater display layout You can edit the colors of all the items on your screen 8 1 Dive Time The large yellow number in the upper right hand corner of your display is the Dive Time Dive Time Dive time is measured in seconds starting from the moment your XEO reaches 1 6 meters 5 25 feet It will stop once you surface and it will reset once you have been on the surface for more than the Minimum Surface Interval 8 2 Depth The green number in the lower right hand corner of the Max Depth display is your Current Depth Depth d Liquivision Products Inc 21 Xeo Manual LIQUIVISION XEO Dive Computer UserManval 8 3 Maximum Depth The label MAX refers to the maximum depth you have reached over yo
12. LIQUIVISION XEO Dive Computer UserManual LIQUIVISION Xeo Shortened Manual For the full version of the manual please go to htto liauivision com docs Xeo User Manual pdf Liquivision Products Inc XEO Manual LIQUIVISION XEO Dive Computer UserManval CONTENTS AT OAT ING s OE N N OE A 4 MIENIE TREE ee ob ee ee ee ed dated A cater uss Pactra da anton ee ee ee ee E ee Ee 5 VER AGREEMENT AND WARRANTY ne 6 GETTING STARTED BEFORE DIVING THE XEO iirvrvvrrrnrrnsssrrnsssnrrnsssvrnsssnrrnsssvvrnsssnvrnsssnvesssen 6 Turning the XEO on off 2 0 0 0 ee ee ee ee Re ee Re Re ee ee 6 Register Your Unit Activate Your Dive Software sesse ee ss ee ee ee ee ee ee ee ee ee 6 Setup Time Date amp Battery Type Gradient Faclors ee ee 6 GETTING STARTED FEATURES OF THE XEO sees ee esse ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 7 MENU EE EE N RE EE EE EE EE 8 SPOT Ne 8 LOCK UNLOCK FREE REN 8 DEF EE EE EE EE EE EE EE N 8 Mode ee oe re ee GE eo ee eee en een ee de 8 NAN 10 DECO SEMNOS oe ne E E ET A EANO A 10 YOU S AMONO EE E AAE E E EE EEE E EEEE 11 MUNN a ENE E E E E E AA OE N ee ee 11 DIVE LOG RE E EE E AAEE A 12 comecdoPL en 12 MIEMITNNT 13 EMERGENCY N N EE OE EE Oe 13 FAN UB eed AEA E Ge EG oe ER EE 13 GFs Off Undo GEFs OR ee ee ee Re Re Re Re Re Re Re ee Re 13 LOST GOS ARE EE N EE EE NE EE ER EN OE NE EE N EN 13 Sence ATS he 13 CHange SEP ei Ee IG E EE TEE EE 13 Change C7 0 AE E E E TAA
13. UserManval 8 8 Temperature The current temperature of the surrounding environment is displayed in the lower left hand corner next to the battery indicator It is displayed either in Celsius or in Fahrenheit depending on your Units setting You will see a C or F letter next to the temperature value to let you know which units you have selected Keep in mind that the temperature sensor is inside the XEO unit so it may take a moment for it to adjust to a rapid external temperature change 8 9 Battery Indicator The battery status is represented graphically with a battery icon or with a battery voltage value Battery Savings mode In the event that your battery Is very low during the dive your XEO will go into Battery Savings mode It is a mode that tries to preserve the battery as much as possible so that the XEO keeps functioning as long as possible All the information on the display will turn green the color that is most power economical and the display brightness will be set to low 9 Exiting the water Once you are shallower than 0 6 meters 2 feet your XEO will go back into surface mode and offer you access fo surface menus However for next few minutes if will remain in post dive mode This means that if you resume your dive within that period if will be counted as continuation of previous dive instead of a new one This also means that all the numbers such as maximum depth average
14. able at your current depth including your current gas If you select Show All if will display all Dive and Deco gases available except for those that you marked as Lost 2 Silence Alarms Choosing the Silence Alarms option will cause ALL of the alarms that are on at that moment to be silenced until the end of the dive Keep in mind that the descent and ascent rate alarms are the same alarm if you silence the descent rate alarm on the way down you will not see alarm go off if you ascend too fast on the way up 3 Change Setpoint This menu item appears only when you are diving in CCR mode and provided you are not bailing out Liquivision Products Inc 13 Xeo Manual LIQUIVISION XEO Dive Computer UserManual In the surface menus you can configure your High and Low setpoints If you are currently diving either the High or the Low setpoint then only the alternate option will be displayed This means that if you re at the Low setpoint the first item will be High and conversely if you re at the High setpoint the first item will be Low If you are currently diving a custom setpoint both options will be displayed High and Low Also there is a Custom Setpoint option By choosing if you can change your setpoint to any value between 0 3 up to 2 0 in 0 1 increments 4 Change Gas This menu item appears only when you are diving OC or when you are diving CCR in bailo
15. and restart during your dive Here is how it appears in each of the four screen layouts STANDARD SIMPLE ALTERNATE LARGE If the Stopwatch is Off your XEO s underwater menu has an item called Stopwatch On If you select this item by tapping either side of your XEO unit you will activate the Stopwatch function and you will see your dive display rearrange itself it will show the Stopwatch in addition to the information it was previously displaying When the Stopwatch function is On and you return to the underwater menus you will see a menu item called Stopwatch and this takes you to the submenus that control the use of the stopwatch Stopwatch Shortcut if the Stopwatch is On then by tapping three five times on a side of your XEO you will be taken directly to the stopwatch sub menu 6 Reset AVG This option is only available in gauge mode as well It will reset the average depth that has been calculated from the beginning of the dive and it starts calculating it from this point onwards Keep in mind however that the average depth in your dive log will be average depth over the whole dive Liquivision Products Inc 15 Xeo Manual LIQUIVISION XEO Dive Computer UserManval DIVING WITH YOUR XEO IN DECO MODE 1 Dive Planning Your XEO has a wide set of features that can assist you with your dive planning and preparation You can configure the basic mode of the unit you are diving with the gases that
16. as possible so that the XEO keeps functioning as long as possible All the information on the display will turn green the color that is most power economical and the display brightness will be set to low 6 Exiting the water Once you are shallower than 0 6 meters 2 feet your XEO will go back into surface mode and offer you access to surface menus However for next few minutes it will remain in post dive mode You can control length of this period in menu setting Minimum Dive This means that if you resume your dive within that period it will be counted as continuation of previous dive instead of a new one This also means that all the numbers such as maximum depth average depth dive time etc will not be reset After that if you decide to dive again It will be counted as a new dive 7 Altitude Compensation Surface Pressure Adjustments Your XEO continuously tracks atmospheric pressure to determine the surface pressure at the start of your dive When if senses a sudden change in ambient pressure if understands that you have entered the water and that a dive is beginning Your XEO can generally distinguish between a sudden change in pressure caused by water entry vs other types of sudden changes in pressure such as a plane taking off or driving up a mountain This method of surface pressure detection has proven quite reliable but it is always possible to trick your XEO for example Liquivision Products Inc 29 Xe
17. ather CCR modes If you choose CCR you will be given the option to make the following selections Setpoints You can choose to set your Low SP and your High SP e Low will be between 0 3 1 0 e High will be between 0 5 2 0 Liquivision Products Inc 8 Xeo Manual LIQUIVISION XEO Dive Computer UserManval Setpoints progress in 0 1 increments The Low setting has to be lower than the High one Auto Switch OFF ON This menu item allows you to set Auto Switch to either On or Off When Auto Switch is On your XEO will automatically switch your setpoint from Low to High and vice versa Two more options relating to your Setpoints are On Descent and On Ascent These options allow you to configure the depth at which your XEO will automatically switch from Low to High Setpoint and from High to Low Setpoint respectively assuming that you have turned Auto Switch to On Your XEO will also assume when computing the ascent schedule that below the On Descent depth you have your Setpoint set to High and above the On Ascent depth to Low 3 13 Gases Here you can configure up to 10 different gases for use in your dives Add If you select the Add option you will see the following screen in which you can set the specifications of your gas e 02 oxygen percentage in the gas between 0 100 e He helium percentage in the gas between 0 100 e Mode Div
18. depth dive time etc will not be reset After that if you decide to dive again It will be counted as a new dive Liquivision Products Inc 24 Xeo Manual LIQUIVISION XEO Dive Computer UserManval 9 1 Last dive information When on the surface and not in Sleep Mode your XEO will display information about the last dive that you have done Surface interval it is time elapsed since your last dive If it is less than 24 hours you will see the number of hours and minutes If it is more than 24 hours you will see number of days and hours If it is more than 10 days ago you will not see any surface interval Last depth is the maximum depth of your last dive with one decimal place Depending on your unit settings it will be either in meters or in feet and you will see m or ft printed after the number Last time is the total time of the last dive displayed according to your dive time settings either as total number of minutes or as hours minutes 9 2 Altitude Compensation Surface Pressure Adjustments Your XEO continuously tracks atmospheric pressure to determine the surface pressure at the start of your dive When it senses a sudden change in ambient pressure if understands that you have entered the water and that a dive is beginning Your XEO can generally distinguish between a sudden change in pressure caused by water entry vs other types of sudden changes in pressure such as a plane taking off o
19. e Gas Deco Gas Backup Gas or Off Please note that O2 He cannot be more than 100 Also the nitrogen percentage of a gas is calculated as 100 02 He This submenu will also disolay Maximum Operating Depth MOD of all Dive and Deco Gases This number is calculated by the XEO based on all your settings and has a limit of 200m 650ft No MOD will be displayed for Backup and Off Gases If you change a Backup or Off Gas into a Dive or Deco Gas its MOD will be calculated 3 14 Runtime In this section you can enter your dive plan and see what ascent schedule will XEO compute underwater assuming that you follow the dive plan precisely You can configure two types of waypoints Normal where you set a target Depth and a Time spent at that depth and your XEO uses this information to create a dive plan Switch where you set a target Depth and a Gas you want to switch to at that depth and your XEO uses this information to create a dive plan A few things to keep in mind Your XEO assumes your first waypoint is depth 0 and time 0 When preparing your dive plan your XEO uses the ascent descent rates configured in the Ascent Rate Descent Rate submenu of the Alarms menu If you have recently been diving and are still saturated from those dives there will be an additional item in the Runtime submenu which is Remain SI or Remaining Surface Interval Here you can configure the number of hours and minutes that you plan t
20. e XEO dive computer during your dive You should carry backup instruments including a depth gauge submersible pressure gauge digital bottom timer or dive watch a compass and have access to decompression tables Do not risk your life on only one source of information WARNING ALWAYS CHECK FOR SOFTWARE UPDATES The XEO dive computer software likely still has bugs We have looked for them and tried to eliminate them but they can still appear during use Bugs can cause the units to provide inaccurate or incomplete information or cause the unit to reset or turn off and stop providing any information at all You should always check for software updates hitp liquivision com downloads XEOSoftwareHistory ohp and install all applicable updates every time you prepare to use the XEO dive computer Liquivision Products Inc 4 XEO Manual LIQUIVISION XEO Dive Computer 5 2 Auto Dim Liquivision Products Inc User Manual MENU TREE 1 Shut Off 5 3 Refresh 2 LOCK 5 4 Layout 3 Dive Planning 5 5 Velocity 3 1 Deco 5 6 Stopwatch DF 3 1 1 Dive Setup 5 7 Dark Mode 3 1 1 1 OC 5 8 Analog Clock 3 1 1 1 1 Gases 5 9 Show Hours 3 1 1 1 1 1 Air 5 10 Colors 3 1 1 1 1 2 TMx 21 12 5 10 1 All Colors 3 1 1 1 1 3 Air 5 10 1 1 All Colors 3 1 1 1 1 4 Add 5 10 1 2 All U W colors SN Runtime 5 10 1 3 Factory Default li leds Alarms 5 11 Simulate Dive 3 1 1 1 3 1 Alarms 5 11 1 Depth 3 1 1 1 3 2 Depth 3 1 1 1 3 3 Time 5 11 2
21. ent Factors are a method used to increase the conservatism of the bare B hlmann ZH L16C algorithm Gradient Factors range from 100 100 to 0 0 most added conservatism In fact the 0 0 setting refers to decompression based only on the oxygen window effect no tissue compartment supersaturation Decreasing the Low value from 100 to 30 for example adds conservatism in the deep part of the decompression i e it might introduce additional deep stops and lengthen the deepest stops duration Decreasing the High value from 100 to 85 for example adds conservatism in the shallow part of the dive i e if might substantially lengthen shallow decompression stops 6 Oxygen loading Apart from inert gas loading your XEO also calculates your CNS Central Nervous System and OTU Oxygen Toxicity Unit loading Your current CNS OTU levels are easy to access through the Your Saturation menu item You can view your CNS information and OTU remaining in two ways Access the Your Saturation menu item This will show you how much more OTU you have left for this day Plan your next dive using the Runtime function After you select Compute Deco a window will pop up showing among other values the OTU left for the day of that dive If you plan a dive on the next day which you can do by using Remaining SI option then the OTU left will be displayed for day after that dive not for today Liquivision Products Inc 20 Xeo Manual LIQU
22. ession stops but you are not at the deepest one at the moment TTS and STOP FOR are displayed Picture 2 above e f your XEO s ascent schedule contains decompression stops and you are at the deepest one at the moment TTS and STOP are displayed Picture 3 above 8 5 Dive Setup Based on your Dive Setup settings the moment you begin your dive your XEO will enter either OC or CCR dive mode This will be displayed in the lower leff corner with either OC or CCR Furthermore if during CCR dive you bailout and indicate that by using Bailout menu option this label will change to BAIL Liquivision Products Inc 22 Xeo Manual LIQUIVISION XEO Dive Computer UserManval 8 6 Gas or Setpoint When you are diving OC or CCR in Bailout Mode below the type of dive OC BAIL you will have your current gas displayed It will be O2 for oxygen NxXX for nitrox e g Nx50 for nitrox with 50 oxygen XX XX for trimix e g 20 30 for trimix with 20 oxygen and 30 helium or Air for air that is gas with 21 oxygen and no helium You can switch your current gas in Change Gas menu section When you are diving CCR with bailout mode off below the type of dive CCR you will have your current setpoint displayed with one decimal place You can switch your current setpoint in Change Setpoint menu section 8 7 Gas Alarms Gas alarms will be displayed in the same place as your gas or setpoint If you a
23. hile to read and understand this section In the Dive Setup submenu you can choose the mode you wish to dive in Open Circuit OC or Closed Circuit Rebreather CCR Settings related to OC Dives When diving OC one additional option you can set is Auto Switch you can turn if On or Off When it is Off there wil be no automatic gas switches you will have to do every switch manually When it is On your XEO will automatically switch gas to the Best Gas as long as following criteria are met e There is a Best Gas that is there is at least one gas that is breathable at your depth e And gas Manual Override is Off Gas Manual Override Concept Gas Manual Override is a feature that makes sure your XEO will not stubbornly switch your gas to the Best Gas for your current depth even though you switched gas manually to another gas Liquivision Products Inc 16 Xeo Manual LIQUIVISION XEO Dive Computer UserManval Normally according to the Best Gas concept the Auto Switch would switch you to your Deco Gases when you start the dive until you exceed their respective MODs Similarly if you were to switch gas manually the Auto Switch would try to switch you back to your Best Gas To prevent this we created Manual Override which turns on every time you start a dive or switch gas The Manual Override turns off once you reach a depth where the gas you are actually breathing becomes the Best Gas Sett
24. ings related to CCR Dives When diving CCR there is a larger set of settings to configure First you must set values for your Low and High setpoints You can set them to any value between 0 3 1 0 and 0 5 2 0 respectively in 0 1 increments You can use these pre configured Low and High setpoints to quickly change setpoints underwater this way you don t have to create a new setpoint while underwater These pre configured setpoints will be used to calculate your ascent schedules There are two more values related to these setpoints that you will need to configure On Descent and On Ascent On Descent allows you to configure at what depth you want to switch from the Low setpoint to the High setpoint during your descent On Ascent allows you to configure at what depth you want to switch from the High setpoint to the Low setpoint during your ascent If you follow a different schedule e g you spend all your bottom phase on the Low setpoint you should turn Auto Switch Off Even when you turn your Auto Switch Off you should make sure to configure your On Descent and On Ascent depths Here is how they will affect ascent schedule e When the ascent schedule calculation starts if considers your current setpoint whatever it IS e If your depth is at least the On Descent or deeper the setpoint used to calculate your schedule will be High This means that if you are using the
25. ished the simulated saturation is wiped out If you start a new simulation if will start again from your actual saturation Also the simulated dive will not of course affect your actual saturation e Dive planning these calculations start with your current actual inert gas and oxygen saturation If you are not yet fully desaturated from previous dives then you can tell the Dive Planner to wait certain amount of time on the surface equivalent to whatever time is left of your surface interval The Dive Planner will assume your next dive will begin once your Remaining Surface Interval has elapsed and it will compute your ascent schedule taking into account the Waypoints you set up and the saturations you would expect to reach based on these Waypoints See also the Runtime submenu for more information Whenever you begin a dive be it an actual dive a simulated dive or dive planning your XEO will assume that you are using your Default Gas see the Gas Settings section which when diving OC is the gas that you are breathing at the start of your dive or when diving CCR is your diluent Also in the case of CCR diving your XEO assumes that you start your dive using the Low setpoint Your gas or setpoint will change during an actual dive or simulated dive when o You enter the main underwater menu and use the Change Setpoint or Change Gas options o You enter the EMERGENCY underwater menu and use the Bailout option In bailout
26. mber amp CE Mark Liquivision Products Inc Xeo Manual LIQUIVISION XEO Dive Computer UserManval MENUS Tap 3 times on the top of your unit fo enter the menus 1 Shut Off Tap left on this option to turn your XEO off 2 LOCK UNLOCK This menu item allows you to lock all your menu settings so they cannot change accidentally though you will still be able to tap through the menus To lock just select the LOCK menu item and enter 123 Your XEO is now locked and the menu item changes to UNLOCK To unlock just select UNLOCK and enter 123 once again When a unit is put in LOCK mode the scrollbar will turn Red Once you unlock the scrollbar will turn back into green 3 Dive Planning This whole submenu is devoted to planning your dive here you can set up your unit for Open Circuit Closed Circuit or Gauge Mode diving and automatic gas switching you can enter your gases set up alarms and compute your ascent schedule you will get the exact same one that the XEO will display during your dive provided of course you follow the dive plan precisely 3 1 Mode 3 11 Deco Gauge This menu item allows you to select between Deco or Gauge mode of operation In Deco mode the XEO functions as a trimix dive computer In Gauge mode the XEO functions as a bottom timer 3 12 Dive Setup Dive Setup Unit OC CCR This menu item allows you to choose between Open Circuit OC or Closed Circuit Rebre
27. mode you are considered to be diving OC and breathing your diluent as a gas To change this you can use Change Gas o If the Auto Switch option is on Dive Setup menu either in OC or in CCR mode your current Gas or Setpoint may change as outlined in Settings That Will Affect Your Deco Plan Liquivision Products Inc 19 Xeo Manual LIQUIVISION XEO Dive Computer UserManval Your gas or setpoint will change during dive planning when o You manually enter a Switch gas switch for OC setpoint switch for CCR see Runtime submenu for details o Your XEO computes ascent schedule more on this below When your XEO is computing your ascent schedule it is assuming you will be changing your gas or setpoint on the way up irrespective of the Auto Switch option e When diving OC your gas will be updated always to the Best Gas for a specific depth of your ascent schedule If there is not a single gas breathable at that depth a hypothetical situation which definitely is to be avoided it is not changed The Best Gas is chosen among all Dive and Deco Gases you have set up that have not been flagged as Lost e When diving CCR it does not change your setpoint until o Your depth af this point of your ascent schedule is below On Descent option then the setpoint will be changed to High o Your depth af this point of your ascent schedule is above On Ascent option then the setpoint is changed to Low 5 Gradient Factors Gradi
28. n your screen or remove it e Start and pause the stopwatch e Reset the stopwatch The stopwatch format will match the dive time format you have previously selected either total minutes elapsed or hours minutes elapsed Maximum Depth The label MAX refers to the maximum depth you have reached over your entire dive It is displayed as a single number without decimal places Your maximum depth will reset if you surface for more than 5 minutes 3 Average Depth The label AVG refers to the average depth you have reached over your entire dive The average depth count starts at the beginning of the dive You can reset your average depth once you reach the bottom by tapping into the underwater menus and selecting Reset AVG In that case average depth displayed here will be average depth since the last reset Your Average Depth will reset if you surface for more than 5 minutes Please note that the Average Depth that is saved in the Dive Log is not affected by the reset option it is average depth over the whole dive Liquivision Products Inc 28 Xeo Manual LIQUIVISION XEO Dive Computer UserManval 4 Battery Indicator The battery status is represented graphically with a battery icon or with a battery voltage value 5 Battery Savings Mode In the event that your battery Is very low during the dive your XEO will go into Battery Savings mode It is a mode that tries to preserve the battery as much
29. o Manual LIQUIVISION XEO Dive Computer User Manual e if you place your XEO in shallow and very stable body of water such as a bucket full of dive gear being rinsed your XEO may assume that current surface pressure is more than it is in reality If you go diving immediately after this your depth reading may be distorted e if you increase ambient pressure very quickly after the XEO has adjusted for being at altitude it might go into a phantom dive as It will assume that you have entered the water In this highly unlikely case the only solution is to reset your XEO by removing the battery You can always check what XEO assumes as the current surface pressure by going to the Status screen XEO PC INTERFACE The XEO PC Interface can be used to download your dives and to update your XEO software e Connect the USB cable provided to your PC and to the PC Interface e At this point you should get a message New Hardware Detected e Place the XEO unit on its side with the PC interface aiming for the eight holes on the backplate e The distance from the PC interface to the XEO should be 2 4 cm or 1 2 inches e You need fo install the drivers onto your PC in order to perform the update Please see www liquivision com for more details CONTACT INFORMATION 200 3731 North Fraser Way Burnaby BC Canada V5J 5J2 604 299 0167 info liquivision ca www liquivision com Liquivision Products Inc 30 Xeo Manual
30. o stay at the surface before going on the dive that you are planning Liquivision Products Inc 9 Xeo Manual LIQUIVISION XEO Dive Computer UserManval One final thing to remember is that the Compute Deco feature might produce unexpected and wrong results if you manually enter waypoints that are breaching your decompression ceiling As an example if you enter a 90m 300ft waypoint after which your decompression should start at 42m 140ft but you manually overwrite it by creating next waypoint at 30m 100ft then you would get erroneous decompression computations 3 5 Alarms Your XEO can display visual alarms when you exceed any of the following parameters e Maximum depth e Maximum dive time e Maximum ascent rate e Maximum descent rate When the alarm is activated for any parameter that piece of information will start blinking on your screen for one minute If you do not correct the situation within one minute the parameter display will invert i e if will appear as black letters on colored background until you correct situation causing the alarm Once you do that the alarm will turn off The only exception is a time alarm It will blink for I minute after which it will go back to normal 3 6 Deco Settings In this submenu there is a set of parameters that affect how your XEO calculates your ascent schedule 3 61 GFs L H You will be asked to enter your chosen Gradient Factors prior to your first dive
31. opwatch Dive Time Time of Day Depih Battery Indicator Temperature 2 1 Dive Time One of large numbers on your display is the dive time its location depends on the display setting you have chosen Please refer to the screenshots above to locate the time value for each display setting Dive time is measured in seconds starting from the moment your XEO reaches 1 6 meters 5 25 feet It will stop once you surface and it will reset once you have been on the surface for more than 5 minutes Liguivision Products Inc 27 Xeo Manual LIQUIVISION XEO Dive Computer UserManval 2 2 Depth Another one of the large number on the display is your current depth its location depends on the display setting you have chosen Please refer to the screenshots above to locate the depth value for each display setting If you chose metric units you will see depth in meters and one decimal place in smaller font If you chose imperial units you will see depth in feet and no decimal places 2 3 Stopwatch AS you begin your dive and your XEO goes into dive mode the stopwatch will be off You can activate the stopwatch during your dive by tapping into menu mode and selecting Stopwatch On Turning the stopwatch on will cause the time display to shrink and move and the stopwatch will take its place Screen Layout STANDARD Stopwatch OFF Stopwatch ON During your dive You can e Turn the stopwatch on and off that is display if o
32. r driving up a mountain This method of surface pressure detection has proven quite reliable but it is always possible to trick your XEO for example e if you place your XEO in shallow and very stable body of water such as a bucket full of dive gear being rinsed your XEO may assume that current surface pressure Is more than it is in reality If you go diving immediately after this your depth reading may be distorted e if you increase ambient pressure very quickly after the XEO has adjusted for being at altitude it might go into a phantom dive as it will assume that you have entered the water In this highly unlikely case the only solution is to reset your XEO by removing the battery You can always check what XEO assumes as the current surface pressure by going to the Status screen Liquivision Products Inc 25 Xeo Manual LIQUIVISION XEO Dive Computer UserManval DIVING WITH YOUR XEO IN GAUGE MODE 1 Entering the water WARNING Your XEO in Gauge Mode acts as a bottom timer it calculates the duration of your dive its depth and other simple parameters It does not make any decompression calculations nor does if provide any decompression information You will need to use other means tables desktop decompression planners dive computers etc to plan your dive Never attempt to plan a decompression dive without a proper training Although your XEO in Gauge Mode does not provide any decompression information i
33. re diving OC or CCR in Bailout Mode then Your Best Gas is the gas with the highest content of oxygen among gases that are breathable at your pressure faking into account your min max PO2 END settings If there is such a gas i e there is at least one gas in your gas list that is breathable and you are breathing different gas then Switch Alarm is triggered It is displayed as a Blinking Gas Label Furthermore you can experience following alarms PO2 is triggered if the gas you are breathing at your current pressure has either lower PO2 than your Min PO2 or higher PO2 than PO2 dive if this gas is configured as Dive Gas PO2 deco if this gas is configured as Deco Gas Both PO2 dive and PO2 deco if this gas is configured as Backup Gas or Custom Gas END it is triggered is gas you are breathing at your current pressure has higher END than than your configured Max END OTU if you have exceeded your OTU limit within the last few days refer to Oxygen loading section to learn more about how XEO computes those limits CNS if you have exceeded your CNS limit refer to Oxygen loading section to learn more about CNS tracking Each of the above alarms is displayed as a Blinking Gas Label alternating with the red label of the alarm PO2 END CNS If more than one of them is on they will alternate as well Liquivision Products Inc 23 Xeo Manual LIQUIVISION XEO Dive Computer
34. rmware Liquivision Products Inc 12 Xeo Manual LIQUIVISION XEO Dive Computer UserManval Underwater Menus 1 EMERGENCY This submenu is meant for emergencies only Its settings affect how your XEO calculates your ascent schedule You can familiarize yourself with them by using simulate dive 1 1 Bailout Undo Bailout This option will appear in the menu if you are diving in CCR mode By selecting this option you are informing your XEO that you have just bailed out and switched fo open circuit The XEO will assume that you are now breathing your diluent in OC mode and will also use all the other gases you have configured as Dive Gas or Deco Gas to plan your ascent You can reverse your bailout by returning to the EMERGENCY submenu and choosing Undo Bailout 1 2 GFs Off Undo GFs Off This option is meant for a situation in which you need to get out of the water as soon as possible It will remove any Gradient Factor based conservatism you have set up and will compute your ascent schedule with the bare B hlmann ZH L16C algorithm 1 3 Lost Gas If you have lost a gas that was to be used later for decompression it is very important to use this menu option to mark if as Lost This will prevent this Lost Gas from being used in ascent schedule planning If you fail to do this your ascent schedule will be wrong as the XEO will assume that you can still use that gas At first the Lost Gas submenu displays only gases that are breath
35. t will be a great tool in assisting you to execute a pre planned dive IMPORTANT NOTE ON SWITCHING TO FROM GAUGE MODE In Gauge Mode surface off gassing continues when the device is above water Once the device is underwater all deco calculations are susoended When switching from Gauge Mode to Rec Tec Mode the deco information will no longer be accurate since previous tissue values are used When you switch out of Gauge Mode you will see this warning Tap Left to continue Turning Your XEO On You can turn it on by tapping the unit in the Down direction three five times Otherwise if will turn on automatically few seconds after you take it deeper than 1 6 meters 5 25 feet Beginning Your Dive When you start to descend and go below 1 6 meters 5 25 feet your XEO will turn into dive mode Liquivision Products Inc 26 Xeo Manual LIQUIVISION XEO Dive Computer UserManval 2 Dive Display You have four different Underwater display layouts to choose from Standard Simple Alternate and Large The display layouts menu can be accessed both in surface mode and in dive mode In addition you can customize the color of each piece of information on your display This can only be done on the surface STANDARD Stopwatch Dive Time Time of Day Depth Battery Indicator Temperature SIMPLE Depth Stopwatch Dive Time ALTERNATE siopwafch Depth Temperature Battery Indicator Dive Time me of Day ENGE St
36. ur entire dive Your maximum depth will reset if you surface for more than the Minimum Surface Interval 8 4 Decompression Information Zone The horizontal section in the middle of the screen is reserved for your decompression information Deco Info 1 OC Dive With No Deco 2 CCR Dive With Deco 3 OC Dive With Deco TTS Time To Surface is total time it should take you to get to the surface if you were to precisely follow your XEO s ascent schedule including all the stops and recommended gas switches NDL No Decompression Limit is the maximum time you can still stay at your current depth before the XEO ascent schedule will include decompression stops STOP FOR Shown together see Picture 2 this pair describes the deepest decompression stop on your XEO s ascent schedule Below STOP there is depth of this stop in meters or feet depending on your Units settings and below FOR is its duration in minutes rounded up to the nearest minute STOP Shown as a stand alone value see Picture 3 STOP shows the length of the deepest decompression stop on your XEO s ascent schedule when you are currently at this stop that is within 0 5m 1 6ft from it Now these numbers are displayed in various configurations depending on your depth and XEO ascent schedule e f your XEO s ascent schedule contains no decompression stops TTS and NDL are displayed Picture 1 above e f your XEO s ascent schedule contains decompr
37. ut mode In the surface menus you can configure your gas settings When you tap into this submenu YOU will see list of gases that are allowed for the depth you re at This list is based on your min max PO2 END settings and your gas settings A gas set in Dive mode will use PO2 dive as maximum PO2 while a gas set in Deco mode will use PO2 deco as maximum PO2 The gases will be listed from one with the highest content of O2 to the one with the lowest This list will only display gases that are configured as Dive or Deco gases There is also an option to Show All that will display ALL available gases in the order they are in the Gases menu It will also include gases that are configured as Backup gases and ones that you have set as Lost during your dive Finally there is an option called Custom Gas with which you can configure an additional gas underwater Doing this while diving is very troublesome so we highly recommend that you take steps BEFORE the dive to avoid using this option The best thing Is to input every gas you and your buddies are taking underwater If your buddies use different gases than you do then you should enter them as Backup gases and revert to them in case of an emergency Liquivision Products Inc 14 Xeo Manual LIQUIVISION XEO Dive Computer UserManval 5 Stopwatch The Stopwatch is a timer that you can turn on and off start pause
38. wn set of last decompression stops if you want them to be different from the default You can create up to 5 Last Deco Stops By tapping into each one you can Copy Edit or Delete it The Copy and Add options are only available if there are fewer than 5 Last Deco Stops 3 6 Your Saturation This menu item displays a screen with your current saturation calculated with the B hlmann ZH L16C algorithm The information presented here takes into account data from dives you have actually completed Your Saturation screen after a period of no Your Saturation screen after a deep dive diving Your current CNS Central Nervous System oxygen saturation OTU Oxygen Toxicity Units left for today Time to full desaturation from inert gases Your Allowed Pressure is a theoretical value calculated with the BUhlmonn ZH L16C algorithm which describes the lowest ambient pressure your body could tolerate without experiencing decompression sickness DCS e The Altitude value is a translation of the allowed pressure info a theoretical maximum allowed altitude which is based on average pressures at altitudes As a rule of thumb if the allowed pressure is 2400m or 8000ft you should be able to fly on a commercial airliner as this is the target cabin pressure However if is important to remember that a plane cabin can lose pressure for a variety of reasons and this could be a risk factor These numbers coincide with the Buhlmann algorithm
39. you plan to take with you on the dive as well as your decompression schedule You can configure minimum and maximum gas parameters last decompression stops and algorithm conservatism parameters called Gradient Factors WARNING Never attempt to plan or undergo a decompression dive without proper training Do not use the XEO ascent schedule as a definite source of decompression information The Dive Planning feature is provided ONLY as a way to predict the XEO s ascent schedule computed during dive assuming you follow the dive plan perfectly Both the XEO Dive Planning and In Water Decompression Calculations likely still have bugs We have looked for them and tried to eliminate them but they can still appear during use Bugs can cause the unit to provide inaccurate or incomplete information or cause the unit to reset or turn off and stop providing any information at all You should always check for software updates and install all applicable updates every time you prepare to use the Xeo You must have a plan to handle a XEO dive computer failure during your dive You should carry backup instruments including a depth gauge submersible pressure gauge digital bottom timer or dive watch and have access to decompression tables Do not risk your life on only one source of information 2 Settings That Will Affect Your Deco Plan The following settings affect the data your XEO will use fo compute your ascent schedule so please take a w
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