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Design Aeris, Reference Manual

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37

Partial Pressure

 - The proportion of the total pressure contributed by a single gas in a mixture of gases.

PO2

 - Partial pressure of oxygen.  The proportion of total pressure of a gas mixture contributed by oxygen.

Pre Dive Planning Sequence

™

 (PDPS) - A display of available dive times at 10 FT (3 M) intervals from 30 up to 190 

FT (9 up to 57 M) used when dive planning.

Repetitive Dive

 - Any dive that takes place within 12 hours of a previous dive.

Safety Stop

 - A depth at which a diver may choose, but is not required, to pause during ascent to allow absorbed ni-

trogen to escape naturally from the tissues.

Smart Glo

® - An AERIS name for an instrument backlight feature sensitive to light intensity.

Square Wave Dive

 - A type of dive profile where the entire dive is spent at one depth between descent and ascent.

Tissue (or Tissue Compartment) 

- See Compartment.

Transducer 

- An electro-mechanical device in a dive computer that acts as a depth or pressure sensor.

Transition Period

 - The first 10 minutes of surface time after ascending to 2 FT (0.6 M) from a dive.

Variable Ascent Rate Indicator

™

 - A graphic display that represents ascent rate as a bar graph (part of the Graphic 

Diver Interface).

VARI

 - An AERIS abbreviation for Variable Ascent Rate Indicator.

GLOSSARY

 (continued) -

Summary of Contents for Aeris

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Page 3: ...15 DIVE TIME REMAINING 15 No Deco Dive Time Remaining 15 O2 Time Remaining 17 Air Time Remaining 17 ASCENDING TO THE SURFACE 19 Safety Stop 19 Variable Ascent Rate Indicator 20 DECOMPRESSION 21 Managing Decompression Stops 21 VIOLATION MODES 22 Conditional Violation 22 Delayed Violation s 22 Violation Gauge Mode 23 UNEXPECTED LOSS OF DISPLAY 23 FLYING AFTER DIVING 25 TISSUE DESATURATION 26 MAINTEN...

Page 4: ...Each Day of Diving 12 Hours or Until Your Dive Computer Clears of residual nitrogen THE CODE OF THE RESPONSIBLE DIVER As a Responsible Diver I understand and assume the risks I may encounter while diving RESPONSIBLE DIVING BEGINS WITH Diving within the limits of my ability and training Evaluating the conditions before every dive and making sure they fit my personal capabilities Being familiar with...

Page 5: ...ign 2006 2002 Davis Street San Leandro CA USA 94577 THIS MANUAL The intent of this manual is to consolidate information that is common to the various models of AERIS dive computers It is imperative that you read and understand this manual as well as the OPERATING MANUAL for your specific model dive computer prior to diving with it NOTE In the event that information provided in the OPERATING MANUAL...

Page 6: ..._____________ NOTE Information in this manual relating to nitrox and oxygen features only applies if you are using a dive computer specifically set for dives using nitrox as a breathing gas Throughout this manual and the operating manuals reference is made to the term breathing gas The rational being that most AERIS dive computers can be used for air dives or nitrox dives For clarity these terms a...

Page 7: ... 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 While underwater with AERIS dive computers that have Bar Graphs you can quickly verify that you re not getting too close to the no decompression limit or the limit for exposure to oxygen accumulation or ascending too fas...

Page 8: ...res and have knowledge of the potential risks and hazards of diving with Nitrox AERIS dive computers are NOT for use by commercial divers AERIS dive computers should NOT be utilized for any competitive or repetitive square wave dives as they are intended solely for recreational use and multilevel diving As with all underwater life support equipment improper use or misuse of AERIS dive computers ca...

Page 9: ... risky DSAT published and protected by Diving Science and Technology subsidiary of PADI ALTITUDE DIVING Atmospheric pressure decreases as 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 a...

Page 10: ...e computer is not activated and every 15 minutes when it is activated Samples are not taken and compensation is not provided at any time when the unit is wet When returning to lower altitudes diving should not be conducted until the dive computer automatically clears of any residual nitrogen and oxygen loading and resets to operate at the new altitude Repetitive dives in a series should only be co...

Page 11: ...GRAPH NIBG The NIBG offers you a convenient way to consistently monitor how close you are coming to the No Decompression Limit As you use your dive computer and become familiar with the NIBG you will notice that it displays fewer segments for shorter dive times and shal lower depths Use this feature to adjust conservatism to your diving needs Select models also feature a Setting that allows a Cons...

Page 12: ...levation higher than 14 000 feet 4 270 meters it will perform a diagnostic check followed by immediate shutdown or revert to Watch Mode During activation and diagnostics if any display or function varies from the information presented in the Operating Manual return the unit to an Authorized AERIS Dealer for inspection If a Low Battery condition is indicated AERIS strongly recommends that you DO NO...

Page 13: ...g one of the most important contributions that an AERIS dive computer offers you NO DECOMPRESSION LIMITS Refer to the tables in the Operating Manual provided with your specific dive computer for No Decompression Limits for various altitudes Note that the NDLs do not extend beyond the limit to which the range of the specific dive computer s Pre Dive Planning Sequence a maximum of either 160 FT 48 M...

Page 14: ... the PDPS will indicate for you the adjusted no decompression dive times that are available to you on your next dive based on any residual nitrogen or oxygen accumulation whichever is in control following your last dive and surface interval 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 a...

Page 15: ...specific time being displayed is identified by an icon or graphic No Decompression Time Remaining NDC NDC is the maximum amount of time that you can stay at your present depth before entering decompression It is calculated based on the amount of nitrogen absorbed by hypothetical tissue compartments The rates each of the compartments absorb and release nitrogen is mathematically modeled and compare...

Page 16: ... it is recommended that you allow a surface interval of at least 2 hours before reentering the water If you exceed the maximum 24 hour period allowable oxygen exposure limit it is recommended that you allow a surface interval of at least 24 hours before reentering the water Allowing O2 to reach or exceed allowable limits greatly increases your risk of CNS oxygen toxicity and may result in serious ...

Page 17: ...appear as the DTR display As oxygen accumulation continues to increase the O2BG will enter the Caution Zone Air Time Remaining ATR integrated model dive computers only ATR is the time you can remain at your present depth and still surface with the tank pres sure reserve End Gas Alarm Set Point that you set prior to the dive ATR is calculated using a patented algorithm that is based on the diver s ...

Page 18: ...han NDC and OTR When ATR decreases to 5 minutes an alarm strikes which means that only 5 minutes remain before your air supply will be reduced to the minimum level necessary to perform a safe ascent including any planned Deep and Safety stops and required Deco stops and still provide a tank pressure reserve upon surfacing When ATR decreases to 0 min an alarm will strike again There is no need to p...

Page 19: ... of your ascents with the NIBG inside of the No Decompression Zone 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 No Deco Safety Stop If you have not entered Deco a Safety Stop made between 10 and 20 FT 3...

Page 20: ... then descend below 30 FT 9 M the Stop screen will appear again upon ascent to within 5 FT 1 5 M deeper than the Stop Depth If you ascend 2 FT 0 6 M shallower than the Stop Depth prior to completing it the Stop will be canceled for the remainder of that dive There is no Penalty if you surface prior to completing the Safety Stop VARI Variable Ascent Rate Indicator Most all AERIS dive computers are ...

Page 21: ...ascend to but not shallower than that indicated Stop Depth The amount of decompression credit time that you receive while at a decompression stop is dependent on depth with slightly less credit given the deeper you are below the stop depth indicated Once all required decompression has been completed the dive computer will switch to the No Decompression Dive Mode as indicated by Total Ascent Time 0...

Page 22: ...h displayed If you descend below the Required Stop Depth before 5 minutes have elapsed the unit will continue to function in Decompression Mode While above the Stop Depth no off gassing credit will be given Once off gassing credit begins you descend below the Stop Depth required Deco Stop Depths and Time will de crease toward zero then operation will revert to the No Deco Mode Delayed Violation 1 ...

Page 23: ...spent underwater would re sult in the need for a greater Stop Depth Delayed Violation 3 exceeding Max Operating Depth MOD Upon being alerted of this condition Current Depth will not be displayed until ascent is made to a depth shallower than the MOD Max Depth will not be displayed for the re mainder of that dive Violation Gauge Mode VGM Five minutes after reaching the surface from a dive in which ...

Page 24: ...eriod the countdown will reset to 24 hours UNEXPECTED LOSS OF DISPLAY If your dive computer stops working for any reason it is important that you have antici pated this possibility and are prepared for it If not wait 24 hours prior to using another dive computer If you dive in situations where your trip would be ruined or your safety would be jeop ardized by losing the use of your dive computer a ...

Page 25: ...y dive that required a decompression stop flying should be delayed for at least 24 hours and if possible for 48 hours Since the 1990 UHMS guidelines were introduced data from Diver 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 alt...

Page 26: ...00 feet 305 meters above sea level or greater When repetitive dives are conducted during the same day or period of days it is sug gested 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 Time to Fly is a basic countdown timer that begins counting down from 23 50 to 0 00 hr min 10 minutes after su...

Page 27: ...es with a half time of 160 minutes or less will have desaturated in less than 12 hours MAINTENANCE AND SERVICE A dive computer must be protected from shock excessive thermal conditions chemical attack and tampering The housing made of an impact resistant resin is extremely shock resistant but susceptible to chemical attack and scratches Protect the lens against scratches with an AERIS Instrument L...

Page 28: ... 50 solution of white vinegar and fresh water to soak and dissolve any salt crystals After removal from the bath place the unit under gently run ning fresh water and towel dry before storing Transport cool dry and protected Annual Inspections Your dive computer should be inspected annually by an Authorized AERIS Dealer who will perform a factory prescribed function check and inspection for damage ...

Page 29: ...se if it is an integrated model Package it using a protective cushioning material Include a legible note stating the specific reason for return your name street address daytime phone number serial number and a copy of your original sales receipt Send freight prepaid and insured using a traceable method if warranty service is be ing requested Non warranty service must be prepaid call for an estimat...

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Page 31: ... sickness Decompression 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 using the U S Navy or other No Decompression Tables is no guarantee of avoiding decompression sickness It is extremely important that you read and understand the Operating Manual completely b...

Page 32: ... hours before reentering the water in the event a dive requires emergency decompression By entering decompression you automatically impose a ceiling above you which you cannot immediately ascend beyond denying you free access to the surface Existing data for making planned decompression dives is extremely limited and virtually nonexistent for repetitive decompression diving Decompression diving gr...

Page 33: ...e computer will not be able to help you get safely back to the surface These situations exceed tested limits and can result in loss of some functions of the unit for 24 hours after the dive in which a violation occurred Select models of AERIS dive computers that feature Free Dive operating mode calculate nitrogen oxygen while operating in Free Dive Mode In the event that decompression is entered t...

Page 34: ...y resulting in erroneous depth and or dive time remaining displays If you are in doubt about the accuracy of your dive computer s depth readings DO NOT attempt to dive with it until it has been inspected by AERIS Never pressure test the dive computer in an air environment Doing so may damage the depth sensor possibly resulting in erroneous depth or time readings Never spray aerosols of any kind on...

Page 35: ...Abbreviation for the Central Nervous System of the body Competitive Dive A dive conducted for profit or prize Compartment A term applied to the hypothetical modeling of nitrogen absorption in the tissues more accurate than the term tissue because AERIS dive computers have no direct relation to human tissues DCS Abbreviation for decompression sickness i e the bends Decompression Stop The depth s at...

Page 36: ...on Dive Time Remaining Nitrogen Loading Bar Graph A graphic display of simulated nitrogen absorption on AERIS dive computers NIBG An AERIS abbreviation for Tissue Loading Bar Graph Nitrox A nitrogen oxygen breathing gas mixture that contains a higher fraction of oxygen than air Nitrox Dive A dive conducted using nitrox 22 to 99 O2 as the breathing gas No Deco Time Remaining The amount of dive time...

Page 37: ...scent to allow absorbed ni trogen to escape naturally from the tissues Smart Glo An AERIS name for an instrument backlight feature sensitive to light intensity Square Wave Dive A type of dive profile where the entire dive is spent at one depth between descent and ascent Tissue or Tissue Compartment See Compartment Transducer An electro mechanical device in a dive computer that acts as a depth or p...

Page 38: ... EEC and PPE directive 89 686 EEC EU standards conformity certified by SGS United Kingdom Ltd Weston super Mare BS22 6WA UK Notified Body No 0120 The dive computer s system components used in measuring cylinder pressure meet the require ments of EN250 2000 Respiratory equipment Open circuit self contained compressed air diving apparatus Requirements testing marking pressure gauge test that apply t...

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