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SAFETY GUIDELINES

SAFETY GUIDELINES

•

In 1990 the Undersea and Hyperbaric Medical
Society (UHMS) published a set of guidelines
aimed at minimizing the possibility of
decompression sickness due to flying too soon
after diving.

•

The UHMS suggests that divers using standard
air cylinders and exhibiting no symptoms of
decompression sickness wait 24 hours after their
last dive to fly in aircraft with cabin pressures up
to 8,000 feet (2,440 meters).

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Содержание ATOM 2.0

Страница 1: ......

Страница 2: ...vel diving with Oceanic Dive Computers OBJECTIVES Have A basic understanding of how Dive Computers work Understand the advantages of Dive Computers vs dive tables Understand the pre dive setup planning underwater operation and post dive features of a Dive Computer Determine which Dive Computer features will best suit your type of diving ...

Страница 3: ...S HOW A DIVE COMPUTER WORKS Sensors send data to the Analog to Digital A D Converter A D Converter changes analog data to digital signals The Micro Processor calculates the data and presents it to the diver via the LCD Display ...

Страница 4: ...ple a diver performs a dive for a total time of 24 minutes and the deepest part of the dive was 88 feet On every recreational dive table the depth will be rounded up to the next highest in this case 90 feet Even if the diver only spent 2 minutes of their dive at 88 feet and the rest of their dive at 30 feet the entire profile charts at 90 feet on a dive table ...

Страница 5: ...COMPUTERS vs TABLES COMPUTERS vs TABLES ...

Страница 6: ...e or similar algorithms as the tables and simply perform those same calculations several times a second Going back to the previous example a Dive Computer would take into account that only 2 minutes were spent a 88 feet It adjusts the no decompression dive time remaining thus allowing additional bottom time ...

Страница 7: ...COMPUTERS vs TABLES COMPUTERS vs TABLES ...

Страница 8: ... depth and duration at every point of the dive they can potentially reduce diver error They also automatically time surface intervals as soon as a diver surfaces Again providing more accurate information which can benefit on repetitive dives Over the course of a dive vacation a computer can safely add hours of available bottom time ...

Страница 9: ...PUTER THEORY OBJECTIVES Have A basic understanding of the Decompression Model utilized by Oceanic Dive Computers Have a basic understanding of Tissue Compartments and how they are graphically represented on an Oceanic Dive Computer ...

Страница 10: ...of experiments Commissioned by the Professional Association of Diving Instructors PADI these Doppler ultrasound monitored human experiments conducted by Dr Michael Powell produced the most comprehensive data set that exists for recreational divers to this day These data were used to validate the PADI Recreational Dive Planner and are the basis of the algorithm used in all Oceanic Personal Dive Com...

Страница 11: ... PDC simulate the absorption of nitrogen into the body by using a mathematical model This model is merely a way to apply a limited set of data to a large range of experiences The Dive Computer model is based upon the latest research and experiments in decompression theory ...

Страница 12: ...sing an Oceanic PDC just as using the dive tables is no guarantee of avoiding decompression sickness Every diver s physiology is different and can even vary from day to day No machine can predict how your body will react to a particular dive profile ...

Страница 13: ...Loading Nitrogen Bar Graph provided on most Oceanic PDCs always displays the controlling compartment that is the only one important at that time Think of the Tissue Loading Nitrogen Bar Graph as twelve separate transparent displays laid on top of one another The tissue compartment that has filled up fastest is the only one the viewer can see from the top ...

Страница 14: ...ar point one tissue compartment may be absorbing nitrogen while another that was previously higher may be off gassing NOTE This feature of the Decompression Model is the basis of multilevel diving one of the most important contributions that an Oceanic PDC offers you ...

Страница 15: ...Diving with the VEO 100 Nx Diving with the VEO 100 Nx ...

Страница 16: ...IVES Be able to identify numeric and graphic displays of the Veo 100 Nx Understand the function of the Control Button Identify and understand the information presented via bar graphs Identify and understand low battery power condition displays ...

Страница 17: ...numeric and graphic display represents a unique piece of information It is imperative that you understand the formats ranges and values of the information represented to avoid any possible misunderstanding that could result in error ...

Страница 18: ...CONTROL BUTTON CONTROL BUTTON The Control Button allows you to select display options and access specific information when you want to see it It is also used to enter settings ...

Страница 19: ...sue Loading Bar Graph represents tissue loading of nitrogen showing your relative no decompression or decompression status The Tissue Loading Nitrogen Bar Graph offers you a convenient way to consistently monitor how close you are coming to the No Decompression Limit ...

Страница 20: ... BAR GRAPH As your depth and elapsed dive time increase segments will add to the Graph and as you ascend to shallower depths the Bar Graph will begin to recede indicating that additional no decompression time is allowed for multilevel diving ...

Страница 21: ...Tissue Loading Bar Graph monitors 12 different nitrogen compartments simultaneously and displays the one that is in control of your dive It is divided into a No Decompression normal zone a Caution zone also No Decompression and a Decompression danger zone ...

Страница 22: ...the No Decompression Caution Zone as a visual reference to place a wider margin of protection between you and the No Decompression Limit Oceanic suggests that the Tissue Loading Bar Graph should always be in the No Decompression zone when leaving the water ...

Страница 23: ...UE LOADING BAR GRAPH While you cannot provide a guarantee against the occurrence of decompression sickness you may choose your own personal zone of caution based upon age physique excessive weight etc to reduce the statistical risk ...

Страница 24: ...O2 ACCUMULATION BAR GRAPH O2 ACCUMULATION BAR GRAPH NOTE Displays associated with oxygen and the O2 Bar Graph will only appear if FO2 has been set at a value other than Air e g a numerical value ...

Страница 25: ... ACCUMULATION BAR GRAPH O2 ACCUMULATION BAR GRAPH The Oxygen Accumulation Bar Graph represents oxygen loading showing the maximum of either per dive accumulated oxygen or 24 hour period accumulated oxygen ...

Страница 26: ...ION BAR GRAPH As your oxygen exposure accumulation increases during the dive segments will add to the Bar Graph and as loading decreases it will begin to recede indicating that additional exposure is allowed for that dive and 24 hour period ...

Страница 27: ...T RATE INDICATOR INDICATOR Most Oceanic PDCs are configured with a VARI or Variable Ascent Rate Indicator bar graph that shows how fast you are ascending The VARI provides a visual representation of ascent speed i e an ascent speedometer ...

Страница 28: ...CATOR INDICATOR When you exceed the maximum ascent rate allowed for the depth you are at the bar graph will enter the Alarm Too Fast Zone You will be alerted by all segments of the bar graph flashing which will stop when your ascent rate is slowed ...

Страница 29: ...OWER THAN 60 FT 18 M 0 SEGMENTS 0 10 FPM 0 3 MPM 1 SEGMENT 11 25 FPM 3 5 7 5 MPM 2 SEGMENTS 26 30 FPM 8 9 MPM 3 SEGMENTS 30 FPM 9 MPM DEEPER THAN 60 FT 18 M 0 SEGMENTS 0 20 FPM 0 6 MPM 1 SEGMENT 21 50 FPM 6 5 15 MPM 2 SEGMENTS 51 60 FPM 15 5 18 MPM 3 SEGMENTS 60 FPM 18 MPM VARIABLE ASCENT RATE VARIABLE ASCENT RATE INDICATOR INDICATOR ...

Страница 30: ...DEPTH DISPLAYS DEPTH DISPLAYS During a dive the Current Depth display indicates depths from 0 to 330 FT 99 9 M in 1 FT 0 1 M increments ...

Страница 31: ...DEPTH DISPLAYS DEPTH DISPLAYS By accessing alternate Main Dive Displays the Maximum Depth reached during that dive will be displayed in the center left portion of the display ...

Страница 32: ...DEPTH DISPLAYS DEPTH DISPLAYS During a Decompression Dive the required Ceiling Stop Depth is displayed in the center of the screen ...

Страница 33: ... Main Time display is located in the lower portion of the display and a second time display is located in the center right Both displays are identified by a clock icon Time of Day can be set for 12 hour format AM PM or 24 hour format ...

Страница 34: ...TIME DISPLAYS TIME DISPLAYS Time displays are shown in hour minute format i e 1 16 represents 1 hour and 16 minutes not 116 minutes ...

Страница 35: ...t of time that you can stay at your present depth before entering a decompression situation It is calculated based on the amount of nitrogen absorbed by hypothetical tissue compartments The rates each of these compartments absorb and release nitrogen is mathematically modeled and compared against a maximum allowable nitrogen level ...

Страница 36: ...E REMAINING REMAINING Whichever one is closest to this maximum level is the controlling compartment for that depth Its resulting value will be displayed numerically along with the No Decompression Dive icon and graphically as the Tissue Loading Bar Graph ...

Страница 37: ...tatus and oxygen exposure The Dive Time Remaining display will indicate the time that is more critical for you at that particular moment i e whichever time is the least amount available NO DECOMPRESSION DIVE TIME NO DECOMPRESSION DIVE TIME REMAINING REMAINING ...

Страница 38: ...ll that should provide 300 hours of continuous or 50 activation periods of operation If you conduct 1 dive each time the unit is activated you should obtain approximately 50 dives If you conduct 3 dives each time the unit is activated you should obtain approximately 150 dives ...

Страница 39: ...LY A Battery Indicator provides an indication of battery condition When power is sufficient for normal unit operation the Indicator will be displayed during Surface Mode The Indicator will not be displayed during Dive Mode s ...

Страница 40: ...ated Power has been consumed the lower bar of the Battery Indicator only segment will be displayed and the outline of the Indicator will flash once per second as a warning that the Battery is to be replaced prior to conducting any further dives ...

Страница 41: ...ustain proper operation the Indicator will flash 5 times followed by shutdown of the unit If a Low Battery condition exists when the unit is activated by pressing the button the graphic bAT and the Battery Indicator will appear flashing for 5 seconds followed by shutdown of the unit ...

Страница 42: ...ondition prior to entering the Dive Mode and a Low Battery Condition occurs during the dive there will be sufficient battery power to maintain unit operation for the remainder of that dive The Battery Indicator will then appear after the dive upon entry into Surface Mode ...

Страница 43: ...ting Mode b Icon Descend Arrow Deco Ceiling Stop Bar Ascend Arrow c Graphic Maximum PO2 d Tissue Loading Bar Graph e Graphic Max Depth f Icon Log Mode g Icon Dive No h Icon Temperature i Graphic depth j Variable Ascent Rate Indicator k Graphic Ascent Too Fast l Icon Time m Battery Indicator n O2 Bar Graph ...

Страница 44: ...ting Mode b Icon Descend Arrow Deco Ceiling Stop Bar Ascend Arrow c Graphic Maximum PO2 d Tissue Loading Bar Graph e Graphic Max Depth f Icon Log Mode g Icon Dive No h Icon Temperature i Graphic depth j Variable Ascent Rate Indicator k Graphic Ascent Too Fast l Icon Time m Battery Indicator n O2 Bar Graph ...

Страница 45: ... activate the Dive Computer Understand how to access the Serial Number and Firmware Revision Understand the Veo 100 Nx s calibration and operation at high altitude Understand the information displayed during the Surface Sequence Access Set Mode and modify personal settings ...

Страница 46: ...Button Upon manual activation the unit will enter Diagnostic Mode displaying all segments of the LCD as 8 s followed by dashes then a countdown from 9 to 0 Diagnostic Mode checks the display and Battery voltage to ensure that everything is within tolerance and functioning properly ...

Страница 47: ... held depressed and the Diagnostic countdown reaches 00 a Serial Number screen appears displaying the unit s Serial Number and firmware code Revision Number as long as the button is held depressed Upon releasing the button the unit shuts Off ...

Страница 48: ...r manual activation it will also check the ambient barometric pressure and calibrate its present depth as zero At elevations of 2 000 feet 610 meters or higher it will recalibrate itself to measure depth at that higher Altitude ...

Страница 49: ...s Altitude increases above sea level Weather systems and ambient temperature also affect barometric pressures Consequently depth reading instruments that do not compensate for the decrease in ambient pressure indicate depth readings shallower than the depth they are actually at ...

Страница 50: ...between 2 000 610 meters and 14 000 feet 4 270 meters Its program contains a high altitude algorithm that reduces no decompression and oxygen exposure limits to add a larger zone of caution The Veo 100 Nx senses ambient pressure when it is activated every 15 minutes while it is activated or every 30 minutes when it is not activated ...

Страница 51: ...fresh water rather than feet of sea water It will then readjust the no decompression and oxygen limits at additional intervals of 1 000 feet 305 meters Therefore when returning to lower Altitudes diving should not be conducted until the unit automatically clears of any residual nitrogen and oxygen loading and resets to operate at the new lower Altitude ...

Страница 52: ...E While on the surface the unit will automatically scroll through a Sequence of displays including Surface Mode Fly Mode DeSat Mode Plan Mode As the Surface Sequence is scrolling you can use the button to access Log Mode and Set Mode ...

Страница 53: ...ode identified by the Surface Time icon follows Diagnostic Mode after Activation Information includes Dive Number 0 if no dive made yet Temperature and icon Time of Day with icon the Battery Indicator and Surface Time with flashing colon ...

Страница 54: ...omatically activate by Wet Contact only if Wet Activation is set ON If no dive is made within 2 hours after initial activation the unit will automatically deactivate If the wet contacts are still bridged the unit will reactivate and display the H2O graphic ...

Страница 55: ... be made in sequence one after the other or you can access a specific item that you want to set bypassing others If the button is not pressed during a 2 minute period while in the Set Mode the unit will revert to Surface Mode and resume the Surface Sequence scroll ...

Страница 56: ... depress the button for 2 seconds Upon entry into Set Mode the Set FO2 screen will be displayed with the Set Point flashing To make modifications to settings momentarily press and release the button Depress the button for 2 seconds to accept the Set Point displayed and advance to the next Set Mode screen ...

Страница 57: ...tivated FO2 will be automatically set for a default value of AIR which can then be changed to values between 21 and 50 in increments of 1 Press release the button repeatedly to increase the FO2 value from 21 to 50 in increments of 1 then display AIR again ...

Страница 58: ...lay indicates the Maximum Depth that can be achieved for a PO2 of 1 60 ATA or the PO2 Alarm Set Point If FO2 is set for AIR no Depth value will be displayed Depress the button for 2 seconds to accept the FO2 Set Point displayed and advance to the Set Wet Activation screen ...

Страница 59: ...CTIVATION Factory set for ON Wet Activation can also be set OFF disabled to prevent inadvertent activation during travel or storage When set ON the Veo 100 Nx will automatically Activate and enter Dive Mode upon immersion in water ...

Страница 60: ...d accepted the FO2 setting the Set Wet Activation screen appears with the Set Point flashing Press release the button less than 2 seconds to toggle between ON and OFF Depress the button for 2 seconds to accept the Set Point and advance to Set Units Of Measure ...

Страница 61: ...ET UNITS OF MEASURE SET UNITS OF MEASURE Factory set for Imperial Units of can also be set for Metric After having set and accepted Wet Activation the Set Units screen appears with the Set Point flashing ...

Страница 62: ... SET UNITS OF MEASURE Press release the button less than 2 seconds to toggle between Imperial FT and F and Metric M and C units Depress the button for 2 seconds to accept the Units Set Point and advance to Set Hour Format ...

Страница 63: ...AT SET HOUR FORMAT Factory set for 12 Hour 12 AM to 11 PM the Hour Format can also be set for 24 Hour 0 to 23 hours After having set and accepted Units the Set Hour Format screen appears with the Set Point flashing ...

Страница 64: ...SET HOUR FORMAT SET HOUR FORMAT Press release the button less than 2 seconds to toggle between 12 and 24 Depress the button for 2 seconds to accept the Set Point and advance to Set Time ...

Страница 65: ...T TIME Set for factory local time the Time can be set to values between 0 00 and 12 59 AM PM or 0 00 and 23 59 After having set and accepted Hour Format the Set Time screen appears with the Hour Set Point flashing ...

Страница 66: ...lease the button repeatedly less than 2 seconds each time to advance the Hour Set Point in increments of 1 Hour per press of the button Depress the button for 2 seconds to accept the Hour Set Point the Minutes Set Point flashes ...

Страница 67: ...ase the button repeatedly less than 2 seconds each time to advance the Minute Set Point in increments of 1 Minute per press of the button Depress the button for 2 seconds to accept the Minute Set Point and advance to Set PO2 Alarm ...

Страница 68: ...RM NITROX NITROX Factory set for 1 60 ATA the PO2 Alarm can be set to values between 1 20 and 1 60 ATA in increments of 10 ATA After having set and accepted the Time the Set PO2 Alarm screen appears with the Set Point flashing ...

Страница 69: ...Press release the button repeatedly less than 2 seconds each time to advance the PO2 Alarm setting in increments of 10 ATA per press of the button Depress the button for 2 seconds to accept the PO2 Alarm Set Point and advance to Set FO2 Default ...

Страница 70: ...TROX Factory set ON the FO2 50 Default feature can be set to OFF The effects of this feature being ON or OFF are described later After having set and accepted the PO2 Alarm Set Point the Set FO2 50 Default screen appears with the Set Point flashing ...

Страница 71: ...ET FO2 50 DEFAULT NITROX NITROX Press release the button less than 2 seconds to toggle between ON and OFF Depress the button for 2 seconds to accept the Set Point and advance to the Surface Mode screen and Surface Sequence ...

Страница 72: ...ISES USING THE PDC Manually activate the Veo 100 Nx Access Set Mode and make the following modifications Set FO2 AIR Set Wet Activation ON Set Units Imperial Set Hour Format 12 Set Time Actual Set PO2 Alarm 1 6 Set FO2 50 Default ON ...

Страница 73: ...PRE PRE DIVE PLANNING DIVE PLANNING OBJECTIVES Perform pre dive planning ...

Страница 74: ...e Dive Planning SequenceTM PDPS which appears after Surface Mode prior to the first dive of a new activation period provides a sequence of theoretical dive times available for depths ranging from 30 FT 9 M to 190 FT 57 M in 10 FT 3 M increments ...

Страница 75: ...ths where there is at least 3 minutes of theoretical dive time available at the depth taking into account a descent rate of 60 feet 18 meters per minute The PDPS should be reviewed prior to every dive to help you plan your dive as required to avoid exceeding no decompression or oxygen exposure limits ...

Страница 76: ...ndicates adjusted dive times that are available for the next dive based on residual nitrogen or oxygen accumulation whichever is in control following the last dive and surface interval It appears after the SAT screen in the scrolling Surface Sequence SURF FLY SAT PDPS ...

Страница 77: ...EXCERCISES USING THE PDC EXCERCISES USING THE PDC Plan a dive to 100 feet What is the no deco time allowed ...

Страница 78: ...f the control button Understand the inform provided on Dive Mode displays Understand how to establish a personal level of conservatism by monitoring the Tissue Loading Bar Graph Understand the function and information displayed during a no decompression Safety Stop ...

Страница 79: ...le Each provides Depth Dive Time Remaining and additional information The intent of this feature is to allow the diver to select which information is on display at any given time during the dive The screens can be changed from one display to another as often as desired by pressing and releasing the button momentarily 2 seconds ...

Страница 80: ...autionary type information is displayed e g Decompression High PO2 High O2 etc there is a Main Display of important information relevant to the specific condition Other screens of information can be accessed which automatically revert to the Main Display after 3 seconds ...

Страница 81: ...MODE The Veo 100 Nx will automatically enter the No Decompression Dive Mode when you descend to 5 FT 1 5 M NO DECO DIVE MAIN DISPLAY 1 Information includes Current Depth Dive Time Remaining and Mode icon and the applicable bar graphs ...

Страница 82: ...n 1 time 2 seconds to change the screen to No Deco Dive Main Display 2 NO DECO DIVE MAIN DISPLAY 2 Information includes Current Depth Maximum Depth for that dive and icon Elapsed Dive Time and icon Dive Time Remaining and Mode icon and the applicable bar graphs ...

Страница 83: ...ss release the button 1 time 2 seconds to change the screen to No Deco Dive Main Display 3 NO DECO DIVE MAIN DISPLAY 3 Information includes Current Depth Temperature Time of Day Dive Time Remaining and Mode icon and the applicable bar graphs ...

Страница 84: ...ime 2 seconds to change the screen to No Deco Dive Main Display 4 NO DECO DIVE MAIN DISPLAY 4 will not appear when FO2 is set for AIR Information includes Current Depth current value of PO2 and PO2 graphic Dive Time Remaining and Mode icon and applicable bar graphs ...

Страница 85: ...NO NO DECO DIVE MODE DECO DIVE MODE Press release the button 1 time 2 seconds to return to No Deco Dive Main Display 1 ...

Страница 86: ...the segments that have filled up the Tissue Loading Bar Graph will begin to recede offering a graphic representation of you multilevel diving capability By backing off on the bar graph maintaining fewer segments you can establish a personal level of conservatism and margin of protection ...

Страница 87: ...ed Decompression Mode you must not complete your ascent until the Tissue Loading Bar Graph is at least inside the No Decompression Zone You should make every effort to complete all of your ascents with the Tissue Loading Bar Graph inside the No Decompression Zone ...

Страница 88: ...FACE While you cannot provide a guarantee against the occurrence of decompression sickness you may choose your personal zone of caution based upon your individual age physique excessive weight training experience etc to reduce the statistical risk ...

Страница 89: ... Decompression dive in which Depth exceeded 30 FT 9 M a Safety Stop screen will appear displaying a Stop at 15 FT 4 5 M with a 3 minute Countdown Timer A safety stop made between 10 and 20 FT 3 and 6 M is strongly recommended as a standard procedure before completing your ascent ...

Страница 90: ...TOP DECO SAFETY STOP The Safety Stop will be displayed until the countdown times out or another descent is made below 30 FT 10 M or the diver surfaces There is no Penalty for surfacing prior to completing the Safety Stop ...

Страница 91: ...sibility and are prepared for it This is an important reason for not pushing the No Decompression and Oxygen Accumulation Limits and a critical reason to avoid entering Decompression If you dive in situations where your trip would be ruined or your Safety would be jeopardized by losing the use of your Veo 100 Nx a backup instrument system is highly recommended ...

Страница 92: ...EXCERCISES USING THE PDC NO DECO DIVE MAIN DISPLAY 1 Fill in the display using the following information Depth 85 Feet Dive Time Remaining 36 Minutes Tissue Loading Bar Graph 5 segments Variable Ascent Rate Indicator 2 segments ...

Страница 93: ...O DECO DIVE MAIN DISPLAY 2 Fill in the display using the following information Depth 85 Feet Dive Time Remaining 36 Minutes Tissue Loading Bar Graph 5 segments Variable Ascent Rate Indicator 2 segments Maximum Depth 95 Feet Elapsed Dive Time 16 Minutes ...

Страница 94: ...PDC NO DECO DIVE MAIN DISPLAY 3 Fill in the display using the following information Depth 85 Feet Dive Time Remaining 36 Minutes Tissue Loading Bar Graph 5 segments Variable Ascent Rate Indicator 2 segments Temperature 82 degrees F Time of Day 9 25 ...

Страница 95: ...during the Transition Period Understand the information displayed additional information available and operation following the Transition Period Understand the Time to Fly and Desaturation Time Displays Conduct Pre Dive Planning for a repetitive dive Access and understand the information displayed in Log Mode Understand the information displayed and operation after two hours on the surface ...

Страница 96: ...POST DIVE SURFACE MODE POST DIVE SURFACE MODE When you ascend to 2 FT 0 6 M or shallower the Veo 100 Nx will enter Surface Mode and begin counting Surface Interval ...

Страница 97: ...on Period during which time the following information is displayed Number of that dive during that activation period Temperature ambient Time of Day and icon Battery icon Surface Interval time colon flashing and icon flashing Tissue Loading Bar Graph O2 Bar Graph if set for Nitrox ...

Страница 98: ...SITION PERIOD During the Transition Period Log Mode can be accessed No other modes e g PDPS Fly DeSat Set are accessible To view the Log for that dive during the transition period press release the button less than 2 seconds ...

Страница 99: ...RANSITION PERIOD If you descend during the 10 minute Transition Period time underwater will be considered a continuation of that dive The time at the surface if less than 10 minutes will not be added as Elapsed Dive Time ...

Страница 100: ...flashing indicating that the Dive and Transition Period are completed and a subsequent descent will be considered a new dive For the remainder of the first 2 hours after surfacing information will continue to be displayed as the Surface Sequence scrolling through the Surface Mode Fly Sat Plan screens You will also have full access to Log and Set modes ...

Страница 101: ...down 10 minutes after surfacing from a dive after the Transition Period The FLY countdown always begins at 23 50 hr min and the DeSat countdown at 23 50 maximum If a Violation occurred during the dive a single dash will appear instead of the letters FLY DeSat time will not be displayed ...

Страница 102: ... higher elevations After a Surface Interval of 12 hours you may choose to fly or travel to higher elevations provided that your dive profile s did not enter decompression If your diving involved decompression or a repetitive multi day profile it is strongly recommended that you wait a full 24 hours after your last dive to add a greater degree of protection ...

Страница 103: ...E PRE DIVE PLANNING DIVE PLANNING After a dive the PDPS provides adjusted No Decompression Limits based on residual nitrogen calculated to be remaining from that dive and previous dives in the same series ...

Страница 104: ...es each subsequent dive will then overwrite the oldest dive stored in the Log It is therefore suggested that you transfer the Log s data to your log book at the end of each day of diving Log data will not be lost when the battery is removed replaced however factory service and calibration will delete the data ...

Страница 105: ... multiple 1 dives in the Log Each dive has 3 Log screens Dive Identifier Preview Dive Data and O2 Data if a Nitrox dive Dives are displayed in a reverse sequence that starts with the dive most recently recorded back to the oldest one stored The most recent dive will always be the first shown in the sequence ...

Страница 106: ... momentarily 2 seconds while the unit is scrolling through the Surface Sequence The first screen Dive Preview Identifier of the most recent dive conducted will appear displaying Log Mode icon Dive Number for that activation period Time of Day that the dive started ...

Страница 107: ...een Information includes Log Mode icon Maximum Depth Minimum temperature Surface Interval prior to that dive Elapsed Dive Time VARI showing the maximum ascent rate TLBG showing tissue nitrogen loading at the time you surfaced at the end of the dive The segment that reflects the maximum loading during the dive will appear flashing ...

Страница 108: ...ton momentarily to view the third screen Information includes Log Mode icon Graphic FO2 at top and FO2 Set Point at bottom Maximum PO2 level O2BG showing oxygen loading at the time you surfaced To access the first screen of the previous dive s Log press release the button momentarily 2 seconds ...

Страница 109: ...R THE DIVE Two hours after the last dive the Surface Sequence will no longer be displayed The Time to Fly and DeSat countdown screens will be displayed alternately for 3 seconds each until they count down to 0 00 or another dive is made ...

Страница 110: ...settings press release the button to reactivate the Surface Sequence The unit will again revert to the Time to Fly and Desaturation countdowns after 2 hours if the button is not pressed Surface Interval Times greater than 9 59 hr min will be displayed only as Hours 10 11 12 etc ...

Страница 111: ...CTS If the graphic H2O appears during the Surface Mode Fly Mode or Desaturation Mode it is an indication that the wet activation contacts are bridged still wet and the unit must be rinsed in fresh water and thoroughly dried ...

Страница 112: ...ed prior to the countdowns reaching 0 00 hr min or making another dive it will shut off then automatically reactivate The graphic H2O would then appear in place of Dive Number when Surface Mode is displayed during the Surface Sequence If no dive is made after activation the unit would shut off after 2 hours then automatically reactivate again if wet repeating the action until cleaned and dried ...

Страница 113: ...EXCERCISES USING THE PDC EXCERCISES USING THE PDC Access the Log Book and identify the following for the most recent dive Dive Number Time of Day Maximum Depth Elapsed Dive Time Surface Interval ...

Страница 114: ...e Understand the information displayed and procedures for high PO2 and high O2 accumulation situations Understand the information displayed in Decompression Dive Mode Understand how to manage a Decompression Dive Understand the situations that may result in the Dive Computer entering Violation Mode Understand the information displayed and procedures for Violation Mode situations ...

Страница 115: ...TROX After Activation the Veo 100 Nx will operate as an AIR computer without displaying information associated with oxygen calculations unless it is set for a percentage of oxygen FO2 other than AIR a numerical value between 21 and 50 ...

Страница 116: ...alculations the same as if FO2 were set for 21 oxygen internally accounting for oxygen loading for any subsequent Nitrox dives However oxygen related displays warnings and the O2 Bar Graph will not appear on the display for that dive or subsequent dives unless FO2 is set for a numerical value 21 to 50 ...

Страница 117: ...d to operate as an AIR computer until 24 hours after the last dive AIR will not be displayed as an option in the FO2 Mode However you can set FO2 for 21 for use with AIR When FO2 is set at a value of 21 the unit will remain set at 21 for subsequent Nitrox dives until FO2 is set to a higher value or until it automatically turns Off and is reactivated ...

Страница 118: ...will see either predicted no decompression limits NDLs based upon your previous dive profiles if calculated to be nitrogen controlled or predicted oxygen tolerance limits OTLs based upon either a single dive exposure or your 24 hour accumulation of oxygen if calculated to be oxygen controlled ...

Страница 119: ...llowed for a PO2 level of 1 60 ATA for the FO2 setting will also be displayed If the Tissue Loading Bar Graph is displayed that next dive is calculated to be controlled by nitrogen loading If the O2BG and O2 symbol are displayed it is calculated to be controlled by oxygen loading ...

Страница 120: ...er than 1 40 ATA or 0 20 ATA less than the PO2 Alarm Set Point a user setting the current PO2 value PO2 symbol O2 segment of the O2 Bar Graph and UP Arrow will appear on the Main Display as a warning until PO2 decreases Current Depth and Dive Time Remaining will also be displayed ...

Страница 121: ...increase toward a maximum display value of 5 50 ATA in increments of 01 ATA When it reaches a value of 1 60 ATA or the PO2 Alarm Set Point a user setting the current PO2 value PO2 symbol O2 segment of the O2 Bar Graph and UP Arrow will flash as a warning until PO2 decreases ...

Страница 122: ...he repetitive Nitrox dives you conduct during that 24 hour period whichever of the two is greater at that time The O2 Bar Graph offers you a convenient way to consistently monitor how close you are coming to the limits of oxygen exposure Use it as a visual reference to place a wider margin of protection between you and the Limits ...

Страница 123: ... or exceeds the limit for a single exposure or the exposure limit for a 24 hour period Oxygen Dive Time Remaining becomes zero 0 00 and the O2 Bar Graph will enter the O2 Danger Zone The UP Arrow and the full O2 Bar Graph will flash as a warning until the level of oxygen decreases below the limit ...

Страница 124: ...MPRESSION DECOMPRESSION Oceanic PDCs are sophisticated instruments designed with capabilities that go beyond the range of recreational diving They can help you to avoid and if necessary manage decompression ...

Страница 125: ...ression Mode the Mode icon will change from No Deco to Deco The UP Arrow and Deco Bar will flash if you are greater than 10 FT 3 M deeper than the Required Stop Depth Once you are within 10 FT 3 M of and below the required Stop Depth both Arrows and the Bar appear solid ...

Страница 126: ...otal Ascent Time includes Stop Times required at all required decompression ceilings and vertical Ascent Time calculated at 60 FPM 18 MPM for depths deeper than 60 FT 18 M and 30 FPM 9 MPM per minute for depths of 60 FT 18 M and shallower ...

Страница 127: ...GING DECOMPRESSION To fulfill your decompression obligation you should make a safe controlled ascent to a depth slightly deeper than or equal to the Required Ceiling Stop Depth indicated and decompress for the Stop Time indicated ...

Страница 128: ...MANAGING DECOMPRESSION You should stay slightly deeper than the required stop depth indicated until the next shallower stop depth appears Then you can slowly ascend to but not shallower than that indicated ceiling stop depth ...

Страница 129: ...the deeper you are You should stay slightly deeper than the Required Stop Depth indicated until the next shallower Stop Depth appears Then you can slowly ascend to but not shallower than that indicated ceiling Stop Depth While in Decompression Mode Alternate Displays can be accessed that will automatically revert to the Main Default Display after 3 seconds ...

Страница 130: ...ds its capacity to predict an ascent procedure When you exceed certain limits Oceanic Dive Computers alert you with visual and audible select models warnings and operate in special Violation Modes Entering Violation Mode will result in loss of all decompression and oxygen monitoring functions for 24 hours after that dive ...

Страница 131: ...ditions cause Oceanic Dive Computers to enter Violation Mode Staying above a required Deco Stop Depth for more than 5 minutes Your decompression requires a Ceiling Stop Depth greater than 60 FT 21 M You exceed the maximum operating depth of 330 FT 99 M ...

Страница 132: ...er of that dive and for 24 hours after surfacing Violation Gauge Mode turns the Veo 100 Nx into a digital instrument without any decompression or oxygen monitoring functions Only Current Depth Max Depth Elapsed Dive Time and the Variable Ascent Rate Indicator will be displayed The TLBG and O2BG will both flash as a warning of this condition ...

Страница 133: ...in Violation Modes the Alternate Displays previously described for Deco Dive Mode can be accessed Alternate Displays will automatically revert to the Main Default Display after 3 seconds unless the button is pressed to view another Alternate Display ...

Страница 134: ...onfigured with a RESET feature that allows data to be cleared including Nitrogen and Oxygen calculations and Log Mode entries WARNING Reset after a dive and subsequent use for a repetitive dive conducted by the same diver could result in serious injury or death ...

Страница 135: ...CO DIVE MAIN DISPLAY 1 Fill in the display using the following information Depth 21 Feet Total Ascent Time 9 Minutes Decompression Ceiling 20 Feet Decompression Stop Time 2 Minutes Tissue Loading Bar Graph 8 segments O2 Accumulation Bar Graph 3 segments ...

Страница 136: ...TENANCE OBJECTIVES Describe care and cleaning procedures Identify inspection and service interval Understand basic practices for battery replacement Understand the procedure for pre dive inspection of the Dive Computer ...

Страница 137: ...rotect the lens against scratches with a transparent Instrument Lens Protector Small scratches will naturally disappear underwater Soak and rinse the Veo 100 Nx in fresh water at the end of each day of diving and check to ensure that the areas around the low pressure depth sensor and button are free of debris or obstructions ...

Страница 138: ...NING To dissolve salt crystals use lukewarm water or a 50 white vinegar 50 fresh water bath After removal from the bath place the unit under gently running water and towel dry before storing Transport your unit cool dry and protected ...

Страница 139: ...ction check and inspection for damage or wear To keep the 2 year limited warranty in effect this inspection must be completed one year after purchase 30 days Oceanic recommends that you continue to have this inspection performed every year to ensure it is working properly The costs of annual inspections are not covered under the terms of the 2 year limited warranty ...

Страница 140: ...aken to prevent the entrance of moisture or dust To prevent formation of moisture in the Battery Compartment it is recommended that the Battery be changed in an environment equivalent to the local outdoor temperature and humidity e g do not change the Battery in an air conditioned environment then take it outside during a hot sunny day ...

Страница 141: ...BATTERY REPLACEMENT BATTERY REPLACEMENT NOTE If the old battery can be removed and the new inserted within 8 seconds nitrogen and oxygen calculations and settings will be retained for repetitive dives ...

Страница 142: ...Mode Observe the LCD display to ensure it is consistently clear and sharp in contrast throughout the screen WARNING If there are any portions of the display missing or appearing dim or if a low battery condition is indicated return your Veo 100 Nx to an Authorized Oceanic Dealer for complete evaluation before attempting to use it ...

Страница 143: ...ive Computer be inspected by an Authorized Oceanic Dealer How long do you have to change a battery between dives to retain nitrogen and oxygen calculations for repetitive dives What should you do if you notice a problem with the Dive Computer during your pre dive inspection ...

Страница 144: ...ional divers who have successfully completed a recognized course in SCUBA diving and have knowledge of the potential risks and hazards of SCUBA diving Oxygen features are intended for use by divers who have successfully completed a recognized course in diving with enriched nitrogen oxygen Nitrox mixtures and have knowledge of the potential risks and hazards of diving with Nitrox ...

Страница 145: ...e from your Authorized Oceanic Dealer before diving with it During activation and diagnostics if any display or function varies from the information presented in the Operating Manual return the unit to an Authorized Oceanic Dealer for inspection If a low battery condition is indicated Oceanic strongly recommends that you do not dive until the battery is replaced ...

Страница 146: ...must be verified or set to match the percentage of oxygen in the Nitrox mix or mixes being used The Pre Dive Planning Sequence provides predicted times for subsequent dives You may actually have less time available than indicated because of breathing gas quantity and consumption or oxygen accumulation ...

Страница 147: ...or to every dive to help you plan your dive as required to avoid exceeding no decompression or oxygen exposure To reduce your risk of exposure to decompression sickness oxygen toxicity and the effects of excessive ascent rates you should keep each of the bar graphs if available in normal zones throughout your dives ...

Страница 148: ...ther Dive Computer for a repetitive dive It should not be considered that the capabilities built into Oceanic PDCs provide any implied approval or consent from Oceanic for individuals to exceed the defined limits of recreational dive profiles as agreed on by all internationally recognized training agencies ...

Страница 149: ...TY GUIDELINES SAFETY GUIDELINES Always plan each dive Always limit your dive to the level of your training and experience Always make your deepest dive first Always make the deepest part of every dive first ...

Страница 150: ... Check your Dive Computer often during the dive Do a safety stop on every dive Allow an adequate surface interval between each dive Allow adequate surface intervals between each day of diving within 12 hours or until your computer clears ...

Страница 151: ... necessary for diving deeper than the maximum recommended depth limit for recreational diving generally agreed to be 130 FT 39 M by most diving instruction authorities Decompression diving or diving deeper than 130 FT 39 M will greatly increase your risk of decompression sickness ...

Страница 152: ...n diving is inherently hazardous and greatly increases your risk of decompression sickness even when performed according to the Dive Computer s calculations Using a Dive Computer just as dive tables is no guarantee of avoiding decompression sickness ...

Страница 153: ...ines aimed at minimizing the possibility of decompression sickness due to flying too soon after diving The UHMS suggests that divers using standard air cylinders and exhibiting no symptoms of decompression sickness wait 24 hours after their last dive to fly in aircraft with cabin pressures up to 8 000 feet 2 440 meters ...

Страница 154: ...are If a diver had less than 2 hours total accumulated dive time in the last 48 hours then a 12 hour surface interval before flying is recommended Following any dive that required a decompression stop flying should be delayed for at least 24 hours and if possible for 48 hours ...

Страница 155: ...s Alert Network DAN was introduced that resulted in DAN s position that A minimum surface interval of only 12 hours would be required in order to be reasonably assured a diver will remain symptom free upon ascent to altitude in a commercial jet liner with cabin pressures up to 8 000 feet 2 440 meters ...

Страница 156: ...Y GUIDELINES Divers who plan to make daily multiple dives for several days or make dives that require decompression stops should take special precautions and wait for an extended surface interval beyond 12 hours before flight ...

Страница 157: ...t is guaranteed to prevent decompression sickness completely Rather there can be a guideline that represents the best estimate for a conservative surface interval for the vast majority of divers There will always be an occasional diver whose physiological makeup or special diving circumstances will result in the bends ...

Страница 158: ...ing 12 hours prior to exposure to atmospheric pressures equivalent to 1 000 feet 305 meters above sea level or greater When repetitive dives are conducting during the same day or period of days it is suggested that the interval be increased to a minimum of 24 hours Land travel to higher elevations after diving must also be considered as an exposure to altitude ...

Страница 159: ...is no substitute for common sense and a Dive Computer only provides the person using it with data not the knowledge to use it Remember also that the Dive Computer does not actually measure and test the composition of your body tissue and blood ...

Страница 160: ...t line Oceanic pioneered many features and design elements now considered industry standards in digital instrumentation design and technology The following is an overview of additional Oceanic Dive Computer models It is intended to provide you with an understanding of the basic differences between various types of Dive Computers ...

Страница 161: ...o line features the following feature enhancements Audible Alarm with Flashing Red LED Warning Light SmartGlo Backlighting OceanLog PC Interface with Detailed Dive Log and Settings Upload Digital Gauge Mode Date Stamp 24 Dive On Unit Log Book ...

Страница 162: ...he Veo 180 the Veo 250 offers the following enhancements 2 Button Operation for ease of navigating display and set modes On Unit Simulator Set Max Depth Elapsed Dive Time and Tissue Loading Bar Graph Alarms Set Backlight Duration Set PC Sampling Rate ...

Страница 163: ...nhancements Air Integration displays digital cylinder pressure Dive Time Remaining Display incorporates Air Time Remaining and provides a real number in minutes considering Air Time Remaining Nitrogen and Oxygen absorption and automatically displays whichever allows less time Turn Around Pressure Alarm ...

Страница 164: ... the VT3 offers the following enhancements Wireless Air Integration compatible with up to 3 wireless transmitters 3 Mix Nitrox 21 100 Buddy Pressure Check Alpha Numeric Display Adjustable Safety Stop Conservative Factor Setting Free Dive Mode 512K Memory ...

Страница 165: ...ks all of the features of the VT3 in a wrist watch that is equally at home when worn with a wetsuit or a three piece suit Advanced Digital Watch functions including Alternate Time Zone Stopwatch Lap Timer Daily Alarm and Countdown Timer ...

Страница 166: ......

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