“ ATMOS ai DIVE COMPUTER OWNER'S GUIDE
LIMITED TWO-YEAR WARRANTY For details, refer to the Product Warranty Registration Card provided. COPYRIGHT NOTICE This owners guide is copyrighted, all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine readable form without prior consent in writing from AERIS / 2002 Design. ATMOS ai Owner's Guide, Doc. No. 12-7153 © 2002 Design 2002 San Leandro, Ca.
CONTENTS WARRANTY ................................................................................................................................................................. 2 NOTICES ..................................................................................................................................................................... 2 DECOMPRESSION MODEL ......................................................................................................................................
CONTENTS (continued) PRE DIVE PLAN MODE .................................................................................................. 47 DIVE PLANNER ........................................................................................................................................................ 48 DIVE MODES ................................................................................................................... 51 DIVE MODE BAR GRAPHS ...............................................
CONTENTS (continued) CARE, MAINTENANCE, AND SERVICE ......................................................................... 87 CARE AND CLEANING ............................................................................................................................................. 88 INSPECTIONS AND SERVICE ................................................................................................................................. 89 BATTERY REPLACEMENT ...........................................
WARNINGS AND SAFETY RECOMMENDATIONS 6 The ATMOS ai is not intended for use by military or commercial divers. The ATMOS ai is intended for use by recreational divers who have successfully completed a nationally recognized course in scuba diving, and diving with enriched nitrogen-oxygen (nitrox) mixtures. It must not be used by untrained persons who may not have knowledge of the potential risks and hazards of scuba diving, and diving with nitrox.
FEATURES and DISPLAYS 7
WELCOME TO AERIS ! AND THANK YOU FOR CHOOSING THE ATMOS ai ! Your ATMOS ai presents the information that you need before, during, and after your air (or nitrox) dives using a combination of easy to read displays and identification icons. It can also be set to operate simply as a digital depth gauge/timer. This instructional guide is intended to help you become familiar with the functions and features available and show you examples of displays that you could expect to see in the various operational modes.
CONTROL BUTTONS The two Control Buttons allow you to select display options, access specific information when you want to see it, and activate the Unit and the Backlight. The Front button is named Advance (Fig. 1a) and the Bottom/Side button Select (Fig. 1b). BAR GRAPHS Nitrogen Bar Graph The Nitrogen Bar Graph (Fig. 1c) represents tissue loading of nitrogen, showing your relative no decompression or decompression status.
a b Fig. 2 - O2BG and VARI Deeper than 60 feet (18 m) Segments Ascent Rate = Displayed FPM MPM 0 0-20 0-6 1 21-30 6.5-9 2 31-40 9.5-12 3 41-50 12.5-15 4 51-60 15.5-18 5 >60 >18 60 feet (18 m) & Shallower Segments Ascent Rate = Displayed FPM MPM 0 0-10 0-3 1 11-15 3.5-4.5 2 16-20 5-6 3 21-25 6.5-7.5 4 26-30 8-9 5 >30 >9 Variable Ascent Rate Indicator 10 Oxygen Accumulation Bar Graph (O2BG) The O2 Bar Graph (Fig.
INFORMATIONAL DISPLAYS Each 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. Tank Pressure Display Tank pressure is displayed numerically in the lower window (Fig. 3a). Values of pressure are displayed from 0 PSI (BAR) up to 5000 PSI (352 BAR) in increments of 10 PSI (.5 BAR).
Time and Date Displays Time displays are shown in hour:minute format (i.e., 1:22 represents 1 hour and 22 minutes, not 122 minutes!). The colon that separates hours and minutes blinks once per second when the display is indicating real time (e.g., Elapsed Dive Time), and is solid (non-blinking) when times are calculated projections (e.g., Time to Fly). Due to the importance of the information it presents, the Main Time display is configured with the largest segments of the LCD in the upper window (Fig. 4a).
NOTE: The Informational Displays are described in detail as the various operating modes they appear in are presented throughout this manual. AUDIBLE ALARM When warning situations activate the Alarm, the unit will emit a continuous beeping tone for 10 seconds, or until the situation is corrected, or it is acknowledged by pressing the Advance (Front) button for 2 seconds.
During the following situations, the 10 second continuous tone will be followed by a 5 second steady beep that will not turn off when acknowledged, even if it was user Set OFF Ascending above a required Decompression stop depth for more > 5 min. (Delayed Violation). Decompression requires a ceiling stop depth => 70 FT (18 M). Being on the surface for 5 minutes after a Conditional Violation (Permanent Violation).
POWER SUPPLY The ATMOS ai utilizes one (1) 3 volt, CR2450 Lithium Battery that should provide from 300 dive hours of operation if you conduct one 1 - hour dive each time the unit is activated, to over 600 dive hours of operation if you conduct two or more dives each time the unit is activated. Battery Indicator A Battery Indicator (icon) provides an indication of Battery condition. The Battery Indicator will be displayed during Surface Mode (Fig. 5a). It will not be displayed during Dive Modes.
FO2 MODE After Activation, the ATMOS ai 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 (numerical value between 21 and 50 %). NOTE: Setting FO2 is described on Page 27. Fig. 6 - FO2 Air When set with an FO2 value of 'Air' (Fig. 6), the ATMOS ai will perform calculations the same as if FO2 were set for 21% oxygen, internally accounting for oxygen loading for any subsequent Nitrox dives.
WARNING: The percentage of oxygen (FO2) in the nitrox mix being used must be set 'before each' nitrox dive, unless the FO2 50% Default feature has been turned OFF. FO2 50% Default If the Default is set to ON and FO2 is set to a value 'greater than 21%', the FO2 set point value will automatically revert to 50% 10 minutes after that dive (Fig. 8). The Maximum Depth that can be achieved with a PO2 of 1.60 ATA will also be displayed. Fig.
DIVE TIME REMAINING One of the most important pieces of information on Aeris dive computers is the 'Dive Time Remaining numeric display'. The ATMOS ai constantly monitors no decompression status, oxygen accumulation, and breathing gas consumption rate. 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).
The no decompression algorithm is based upon Haldanes theory using maximum allowable nitrogen levels developed by Merrill Spencer. Repetitive diving control is based upon experiments designed and conducted by Dr. Ray Rogers and Dr. Michael Powell in 1987. Diving Science and Technology® (DSAT), a corporate affiliate of PADI®, commissioned these experiments.
Breathing Gas Consumption and Depth are continuously monitored and Air Time Remaining reflects any change in circumstances. For example, when a buddy starts breathing from your octopus or you suddenly find yourself swimming against a strong current and begin breathing more rapidly, the ATMOS ai will recognize the change and adjust the Air Time Remaining accordingly.
WARNINGS AND SAFETY RECOMMENDATIONS It should not be considered that the capabilities built into the ATMOS ai provide an implied approval or consent from AERIS for individuals to exceed the defined limits for recreational diving, as agreed on by all internationally recognized training agencies. The oxygen features of the ATMOS ai are intended for use by recreational divers trained for nitrox diving by an instructor certified by a recognized training agency to teach diving with nitrox.
LCD LAYOUT i g j h k l b f c e m n t a s o r p d 22 q Components: a. Nitrogen Loading Bar Graph b. Oxygen Accumulation Bar Graph c. Variable Ascent Rate Indicator d. Select (bottom) Button e. Advance (front) Button f. Graphic - Demo Mode g. Icon - Air Time Remaining h. Icon - Set Alarm i. Icon - Log Mode j. Graphic - Depth k. Graphic - Ascent Too Fast l. Icon - Operating Mode m. Icon - Time n. Icon - Safety Stop o. Graphic - Operating Mode p. Graphic - Pressure q.
WARNING: During Activation and Diagnostics, if any display or function varies from the information presented here, return the A TMOS ai to your Authorized AERIS Dealer for inspection.
ACTIVATION To Activate the ATMOS ai - press and release Advance (Front) button. Backup Activation (only functional if the Water Activation feature is set ON) As a backup, the ATMOS ai will also automatically activate by water contact. This is accomplished by bridging the gap between contacts located on the stems of the control buttons and back of the module. The H2O graphic that will be displayed as an indication is described later.
a SURFACE MODE Surface Mode, identified by the Surface Time icon (Fig. 14a), follows Diagnostic Mode after Activation. Information includes Dive Number '0' (no dive made yet), Surface Time (with flashing colon), Temperature (and icon), Time of Day (with icon), the Battery Indicator, and Tank Pressure. NOTE: If the wet contacts are bridged, the graphic 'H2O' will appear in place of the dive number '0' (Fig. 15). After the unit is rinsed and dried, 'O' will replace 'H2O'. Fig.
SET MODES Fig. 16 - Set Mode 1 To help simplify the operations you might perform at the dive site, settings are divided into 2 categories. Set Mode #1 includes several settings that you would change more often and Set Mode #2 includes those items not likely to change once you set them. Set Mode 2 can be accessed by first entering settings in Set Mode 1, or by bypassing Set Mode 1.
ENTERING SETTINGS -SET MODE #1 TO SET - FO2 (while in the Surface Mode) Factory set for Air, FO2 can also be set to values between 21 and 50% in increments of 1%. FO2 defaults to the Air setting whenever the ATMOS ai shuts off. Press Both buttons simultaneously, release when SET: 1 appears. Fig. 18 - Set FO2 Press and release the Advance (Front) button, FO2 appears with the value flashing (Fig. 18).
TO SET - MAX DEPTH ALARM (while in the Surface Mode) Factory set for 330 feet, the Maximum Depth Alarm can be set to values between 30 feet (9 meters) and 330 feet ( 99 meters) in increments of 10 foot (3 meters). Press Both buttons simultaneously, release when SET: 1 appears. Press and release the Advance (Front) button, FO2 appears with the value flashing. Press the Advance (Front) button 1 more time.
TO SET - ELAPSED DIVE TIME ALARM (while in the Surface Mode) Factory set for 0:00 hr:min, the Alarm can be set to values between 0:10 and 3:00 hr:min in increments of 0:05 hr:min. Press Both buttons simultaneously, release when SET: 1 appears. Press and release the Advance (Front) button, FO2 appears with the value flashing. Press the Advance (Front) button 2 more times. The graphic EdT, and Alarm and Dive Time icons appear with the Elapsed Dive Time value flashing (Fig. 21).
PC INTERFACE NOTE: For more information regarding PC Interface, refer to page 78 of this manual and to documents provided with the download product. PC Interface is not a setting, it is included in the Set 1 menu for easy access when data in the unit's memory is to be downloaded (copied) to the PC download software program for storage and viewing. To download data (while in the Surface Mode) Press Both buttons simultaneously, release when SET: 1 appears.
ENTERING SETTINGS -SET MODE #2 NOTE: To return to Surface Mode at any time while in Set Mode, press and hold Both buttons for 2 seconds. The unit will automatically revert to Surface Mode after 2 minutes if no button is pressed. TO SET - UNITS OF MEASURE (while in the Surface Mode) Factory set for Imperial, Units of Measure can also be set for Metric. Press Both buttons simultaneously, release when SET: 2 appears.
TO SET - HOUR FORMAT (while in the Surface Mode) Factory set for 12 Hour (12: AM to 11: PM), the Format can also be set for 24 Hour (0: to 24: hours). Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Press the Advance (Front) button 1 more time. The graphic Hour appears with 12 (or 24) flashing (Fig. 24).
TO SET - TIME OF DAY (while in the Surface Mode) Factory set for factory local time, the Time can be set to values between 01:00 to 12:59 (AM/PM) or 0:00 to 23:59 (24 Hr Format). Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Fig. 25 - Set Hour Press the Advance (Front) button 2 more times. The Time of Day appears with the Hour value flashing (Fig. 25).
TO SET - DATE (while in the Surface Mode) Factory set for the factory local Date, the Date can be set to values between 01 - 01 2002 and 12 - 31 2039. After having set and accepted the Time of Day, the Date appears with the graphic dAY, and Year value flashing (Fig. 27). Fig. 27 - Set Year Press and release the Select (Bottom) button to advance the Year value in increments of one Year, or press and hold to scroll. Press the Advance (Front) button to accept the Year setting.
TO SET - AUDIBLE ALARM (while in the Surface Mode) Factory set for ON, the Audible Alarm can be also be set to OFF. This setting also applies to the LED Warning Indicator that is synchronized with the Audible Alarm. When set OFF, the Alarm will not sound during the conditions described on page 13. Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing.
TO SET - MAX NITROGEN BAR GRAPH ALARM (while in the Surface Mode) Factory set for DECO (all 8 segments), the Maximum Nitrogen Bar Graph (NiBG) Alarm can be set to values between DECO (8 segments) and 1 segment. Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Press the Advance (Front) button 8 more times.
TO SET - TURN PRESSURE ALARM (while in the Surface Mode) Factory set for 00 PSI/BAR (disabled), the Turn Pressure Alarm can be set to values between 1000 and 3000 PSI (69 to 205 BAR) in increments of 250 PSI (17 BAR). Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Press the Advance (Front) button 9 more times.
TO SET - END PRESSURE ALARM (while in the Surface Mode) Factory set for 00 PSI/BAR (disabled), the End Pressure Alarm can be set to values between 300 and 1500 PSI (20 to 104 BAR) in increments of 100 PSI (7 BAR). Press Both buttons simultaneously, release when SET: 2 appears (4 seconds). Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Press the Advance (Front) button 10 more times.
TO SET - DIVE TIME REMAINING ALARM (while in the Surface Mode) Factory set for 0:00 (minutes), the Dive Time Remaining Alarm can be set to values between 0:00 and 0:20 (minutes) in increments of 1 minute. Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Press the Advance (Front) button 11 more times.
TO SET - MAXIMUM PO2 ALARM (while in the Surface Mode) Factory set for 1.60 (ATA), the Maximum PO2 Alarm can be set to values between 1.20 and 1.60 (ATA) in increments of .10 (ATA). Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Press the Advance (Front) button 12 more times. The graphics PO2 and MAX, and Alarm icon appear with the PO2 value flashing (Fig. 35).
TO SET - FO2 50% DEFAULT ON/OFF (while in the Surface Mode) Factory set ON, the FO2 50% Default feature can be set to OFF. The effects of this feature being set ON or OFF are described on page 17. Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Press the Advance (Front) button 13 more times. The graphics FO2 and 50 appear with the ON (or OFF) flashing (Fig. 36).
TO SET - BACKLIGHT DURATION (while in the Surface Mode) Factory set for 7 (seconds), the Backlight Duration can be set to values of 0 (button time only), 3, or 7 seconds. This is the length of time the Backlight will stay on after the button is released. Press Both buttons simultaneously, release when SET: 2 appears. Press and release the Advance (Front) button, the Units screen appears with the set point flashing. Press the Advance (Front) button 14 more times.
TO SET - SAMPLING RATE (while in the Surface Mode) Factory set for 15 (seconds), the Sampling Rate can be set to values of 2, 15, 30, or 60 (seconds), or 2, 5, 10 feet (.5, 1.5, 3 meters). Sampling Rate is the interval at which data samples are recorded during a dive for subsequent download to the PC program. This setting has no effect on displayed data or data in the unit's Log. Press Both buttons simultaneously, release when SET: 2 appears.
TO SET - DIGITAL GAUGE MODE ON/OFF (while in the Surface Mode) Factory set OFF, User Set Digital Gauge Mode can also be set ON. This feature is also described on page 67. NOTE: Once a dive is made with this feature set ON, the setting will be locked ON for 24 hours after the dive. Set Digital Gauge Mode will not appear as a selection for 24 hours after the dive. Press Both buttons simultaneously, release when SET: 2 appears.
TO SET - WATER ACTIVATION (while in the Surface Mode) Factory set ON, this feature can also be set OFF (disabled). When set ON, the ATMOSai will automatically Activate and enter Dive Mode upon immersion in water and descent to 5 feet (1.5 meters). WARNING: If the Water Activation feature is set OFF, the ATMOSai must be manually (push button) activated prior to commencing a dive. Press Both buttons simultaneously, release when SET: 2 appears.
WARNINGS AND SAFETY RECOMMENDATIONS There are few legitimate excuses for making unplanned Decompression dives, and the consequences of this type of diving can be severe. By making an unplanned Decompression dive without the necessary preparation and training, you will have placed yourself in an unnecessarily dangerous situation. Allow a surface interval of at least 24 hours before reentering the water in the event a dive requires emergency decompression.
PRE DIVE PLAN MODE 47
DIVE PLANNER WARNING: The available dive times provided by the Dive Planner are only predictions. Depending on cylinder size, breathing gas consumption, and oxygen accumulation you may have less time available than indicated because of breathing gas quantity or other limitations.
No decompression times are only displayed for depths 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. Depths greater than the maximum depth that can be achieved with a PO2 of 1.60 ATA will not be displayed.
WARNINGS AND SAFETY RECOMMENDATIONS The percentage of oxygen (FO2) in the nitrox mix being used must be 'set before each nitrox dive', unless the FO2 50% Default feature is set OFF (a user setting). The Dive Planner provides predicted times for subsequent dives. Depending on cylinder size, breathing gas consumption, and oxygen accumulation, you may have less time available than indicated because of breathing gas quantity or other limitations.
DIVE MODES 51
DIVE MODE BAR GRAPHS As your depth and elapsed dive time increase, the Nitrogen Bar Graph (Fig. 43a) will fill with segments (green toward red) to represent the absorption of nitrogen. While ascending to shallower depths, the segments that have filled the Nitrogen Bar Graph will begin to recede, offering a graphic representation of your multilevel diving capability. If FO2 was set for a numerical value (nitrox), the O2 Bar Graph (Fig.
During conditions in which cautionary type information is displayed (e.g., Decompression, High PO2, etc.), there is a Main Display of important information relevant to the specific condition. The diver can access another display, but it will automatically revert to the Main Display after 3 seconds. To activate the Backlight during dive modes, press the Select (Bottom) button.
No Decompression Dive Mode - Display #2 (Fig. 45) Information includes Current Depth, Dive Time Remaining (and Mode icon), Temperature, Time of Day, Tank Pressure, and applicable bar graphs. Fig. 45- No Deco #2 press/release the Advance (Front) button to view Display #3 (only if FO2 is set for a numerical value - Nitrox), or Display #1 (if FO2 is set for Air). press and hold the Advance (Front) button for 2 seconds to view the Secondary Display (Air Time Remaining).
No Decompression Dive Mode - Secondary Display (Fig. 47) To view, press the Front (Advance) button for 2 seconds. Information includes Current Depth, Air Time Remaining (and Cylinder icon), Max Depth, Elapsed Dive Time, Tank Pressure, and applicable bar graphs. The Display will remain on the screen for 3 seconds after the button is released, then revert to the Main Display previously selected (#1, 2, 3). Fig. 47 -Secondary Display No Decompression Dive Mode - SAFETY STOP (Fig.
DECOMPRESSION DIVE MODE The ATMOS ai is designed to help you by providing a representation of how close you are to entering decompression. Decompression Dive Mode activates when theoretical No Decompression time/ depth limits are exceeded. Entry into Decompression Dive Mode (Fig. 49) Upon entering Decompression Mode, the Audible Alarm will sound and the red LED Warning Indicator will flash for 10 seconds (unless set OFF), or until acknowledged.
a Managing Decompression Stops The amount of decompression credit time that you receive is dependent on depth, with slightly less credit given the deeper you are. You should stay slightly deeper (Fig. 50a) than the Required Stop Depth indicated (Fig. 50b) until the next shallower Stop Depth appears. Then, you can slowly ascend to, but not shallower than that indicated ceiling Stop Depth. b Fig. 50 -Deco #1 (Main) Decompression Dive Mode - Main Display #1 (Fig.
Decompression Dive Mode - Display #3 (Fig. 52) This display is only available during nitrox dives. Information includes - Current Depth, Total Ascent Time, PO2 value (and graphic PO2), Tank Pressure, and applicable bar graphs. Fig. 52 -Deco #3 press/release the Advance (Front) button to view Display #1. NOTE: While in Decompression Mode, the ATMOS ai will automatically revert to the Main Display (#1) after 3 seconds unless the Advance (Front) button is pressed to view another display of information.
NOTE: Upon entry into certain Violation Modes, the Audible Alarm will emit a 10 second continuous beeping tone. The Alarm will sound even if it is user Set OFF. It also cannot be turned off (acknowledged) by pressing the Advance (Front) button. While in Violation Modes, the Alternate Displays previously described can be accessed using the Advance (Front) button, and the Backlight can be activated using the Select (Bottom) button.
If you descend below the required decompression ceiling before 5 minutes have elapsed, the ATMOS ai will continue to function in Decompression Dive Mode. In this case, no off-gassing credit will be given, and for each minute above the ceiling 11/2 minutes of Penalty Time will be added to Required Stop Time. The added Penalty (decompression) Time will have to be 'worked off' first, before obtaining off-gassing credit.
Delayed Violation Mode #2 (Fig. 55) The ATMOS ai cannot calculate decompression times for Stop Depths much greater than 60 feet (18 meters) and offers no indication of how much dive time would result in the need for a greater Stop Depth. If your Decompression obligation requires a Ceiling Stop Depth 'between' 60 feet (18 meters) and 70 feet (21 meters), the Nitrogen Bar Graph will flash. Total Ascent Time will still be displayed. Full BG Flashing Fig.
Immediate Violation Mode and Violation Gauge Mode WARNING: The ATMOS ai enters Immediate Violation Mode when a situation totally exceeds its capacity to predict an ascent procedure. These dives represent gross excursions into decompression that are beyond the boundaries and spirit of the ATMOS ai design, and an ATMOS ai should not be used for the dives. During a Dive, if a ceiling much greater than 60FT (18M) is required, an Immediate Violation Mode will be entered.
The ATMOS ai will also enter an Immediate Violation Mode 5 minutes after reaching the surface from a dive in which a Delayed Violation occurred. On the surface, Violation Gauge Mode displays the Dive Number, Surface Interval, Temperature, Time of Day, and Tank Pressure. The full Nitrogen and O2 Bar Graphs continue to flash (Fig. 58). FO2, the Dive Planner, and the Time to Fly and Desaturate features will not be available.
Fig. 59 - PO2 Warning As depth increases during a dive, the partial pressure of oxygen (PO2) increases. When PO2 becomes equal to, or greater than, 1.40 ATA, or 0.2 ATA less than the PO2 Alarm set point (a user setting); the red LED will flash, Audible Alarm will sound (unless set OFF), and 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 (Fig. 97).
HIGH OXYGEN ACCUMULATION It is important that you understand that conducting repetitive dives using enriched nitrogenoxygen (nitrox) mixtures can lead to oxygen buildup, reducing oxygen tolerance while increasing the risk of pulmonary oxygen toxicity. AERIS strongly recommends that you avoid exceeding oxygen exposure limits, and reminds you that nitrox diving requires special training and understanding of the effects of oxygen toxicity.
You must immediately focus on making a safe controlled ascent to the Surface to prevent further exposure. As your accumulation (dose) decreases during your surface interval, the O2 Bar Graph will gradually recede into the yellow (caution) zone and green (normal) zone. WARNING: In the event that you exceed the maximum per dive allowable oxygen exposure (dose), it is recommended that you allow a surface interval of at least 2 hours before reentering the water.
USER SET DIGITAL GAUGE MODE (also refer to page 44) When Digital Gauge Mode is set for ON, the ATMOS ai will operate as a Digital Depth Gauge/Timer without performing nitrogen and oxygen calculations. While in Digital Gauge Mode, the range of the Current and Max Depth displays are extended to 399 feet (120 meters) to accommodate activities involving diving with advanced breathing gas mixtures or free diving beyond the normal depth limit of the unit. Fig. 62 - Digital Gauge Mode Information displayed (Fig.
WARNINGS: Making decompression dives without the proper preparation and training will place you in an unnecessarily dangerous situation. Existing data for making planned decompression dives is extremely limited, and virtually non-existent for repetitive decompression diving. Decompression diving greatly increases your risk of decompression sickness. 68 O DI RESP Be a RESPONSIBLE DIVER at all times.
POST DIVE MODES 69
POST DIVE SURFACE MODE When you ascend to 3 feet (1 meter) or shallower, the ATMOS ai will enter Surface Mode and begin counting your surface interval. Transition Period The first 10 minutes is, in affect, a Transition Period during which time the following information is displayed (Fig.
To view that dive's Log (Fig. 65) Refer to page 74 for a description of the Log Mode and displays.
AFTER THE TRANSITION PERIOD (THE FIRST 2 HOURS) For the remainder of the first 2 hours after surfacing, information will continue to be displayed as Surface Mode (Fig. 66) and you will have full access to other modes (e.g., Plan, Fly, Desat, Log, Set, PC, Sim). Fig. 66 - Surface Mode To activate the Backlight, press the Select (Bottom) button.
To access the Time to Fly Countdown press the Advance (Front) button 2 times (while in Surface Mode) The unit will revert to Surface Mode after 2 minutes, unless the Advance (Front) button is pressed to access the Desat Time Countdown. If a Violation occurred during the dive a single dash ( - ) will appear instead of the graphic FLY. Fig. 68 - Time to Fly The Time to Fly counter (Fig.
The unit will revert to Surface Mode after 2 minutes, unless the Advance (Front) button is pressed to access the Log Mode. Two hours after the last dive, the Time to Fly and Desaturation countdowns will be displayed alternately for 3 seconds each until they Both count down to 0:00 or another dive is made. Access to other modes is gained by pressing Either button to return to Surface Mode.
Dives are displayed in a reverse sequence that starts with the dive most recently recorded back to the oldest of the 24 dives stored. Thus, your most recent dive will always be the first shown in the sequence. Log screens are Date/Time started, Nitrogen data, and Oxygen data (if a Nitrox dive). Button Control in Log Mode The Advance (Front) button is used to access a specific dive's Log.
To view the Second Screen of the Log (Nitrogen data) (Fig. 71) press the Select (Bottom) button 1 time (while viewing screen 1). Fig. 71 - Log (2nd screen) Displayed will be Log Mode icon Maximum Depth - reached during the dive (and graphic) Elapsed Dive Time (and icon) Temperature - minimum during that dive (and icon) Surface Interval - prior to that dive (and icon) Variable Ascent Rate Indicator - showing the maximum ascent rate maintained for 4 consecutive seconds during the dive.
AFTER THE FIRST 2 HOURS Two hours after the last dive Surface Mode will no longer be displayed, the Time to Fly and Desaturation countdowns will be displayed alternately for 3 seconds each until they count down to 0:00 or another dive is made. To access other modes or enter settings press Either button to return to Surface Mode. the unit will again revert to the Time to Fly and Desaturation countdowns after 2 hours, if no button is pressed. Fig.
DOWNLOADING DATA TO A PC NOTE: Ensure that the Download product that you acquire is compatible with the ATMOS ai and the PC equipment that you will be using. Using special linking hardware, dive data can be downloaded (copied) from your ATMOS ai to an IBM compatible PC program running on a Windows® operating system. Compatibility requirements and instructions are provided with the optional download package that is available from your Authorized AERIS Dealer.
SIMULATOR (DEMO) MODE 79
SIMULATOR MODE This mode provides you with the ability to practice various dive mode scenarios and computer functions while observing the various displays. Fig. 76 - Simulator Mode The Backlight functions as it normally does. At any time while in Simulator Mode, pressing and holding both buttons simultaneously for 2 seconds shall revert operation to real Surface Mode.
Press and release the Select (Bottom) button to toggle between Gauge ON and OFF. Press and release the Advance (Front) button to accept the setting and advance to DEMO: NI-O2 with CUR (or NEW) flashing (Fig. 78). When set for NEW, calculations are based on zero residual nitrogen and oxygen loading (a clean dive). When set for CUR, calculations take into consideration any residual nitrogen and oxygen remaining from previous 'actual' dives.
Press and release the Advance (Front) button to accept the setting and revert to Demo Surface Mode with the DEMO icon flashing. Fig. 80 - Set Demo FO2 Fig. 81 -Simulated Descent 82 Press and release the Advance (Front) button to access DEMO: FO2 with the DEMO icon and Air (or a numerical value) flashing (Fig. 80). Press and hold the Select (Bottom) button to scroll from Air to 21% through 32% in 1% increments. The scroll will stop when the button is released, or at 32% (Fig. 80).
Descending Hint: Quick taps (<2 seconds) of the Select (Bottom) button starts/ stops Descents and Time Acceleration. Quick taps of the Advance (Front) button accesses Alternate displays. While the Down Arrow is flashing, tap (press/release) the Select (Bottom) button to begin a Descent at a rate of 5 feet (1.5 meters) per real second. Tap (press/release) the Select (Bottom) button during the Descent to stop the Descent.
Ascending Rate of Ascent can be set for 1 or 3 feet per seconds (fps) prior to start of the Ascent. To change the Rate during an Ascent, it must first be stopped. Fig. 83 - Ascent set for 1 fps Fig. 84 - Ascent set for 3 fps (Too Fast) 84 Pressing and holding the Advance (Front) button for 2 seconds will access an Ascent Rate of 1 fps. The green and yellow segments of the VARI and UP Arrow will appear with the Arrow flashing (Fig. 83).
Surfacing from a Simulated Dive The Simulator will enter Demo Surface Mode (Fig. 85) upon ascending to 3 feet (1 meter) or shallower. Press and hold the Select (Bottom) button for 4 seconds to access Time Acceleration. The small Time Clock icon will begin flashing. Tap (press/release) the Select (Bottom) button to increase Surface Interval Time 1 minute per real time second. Tap (press/release) the Select (Bottom) button during the Time Acceleration to restore the time rate to normal. a Fig.
RESPONSIBLE COMPUTER DIVING Since the advent of dive computers, it is a common mistake to assume that the old traditional rules of diving no longer apply, but the truth is just the opposite. Keep these basic rules in mind: Plan each dive, and dive your plan - Your computer was not designed to make decisions for you, only to provide you with the information you need to make responsible decisions for yourself. This begins with a dive plan that will help you avoid a low air or decompression situation.
CARE, MAINTENANCE, and SERVICE 87
CARE AND CLEANING Protect your ATMOS ai from shock, excessive temperatures, chemical attack, and tampering. Protect the lens against scratches with an Aeris Instrument Lens Guard. Small scratches will naturally disappear underwater. CAUTION: Never spray aerosols of any kind on, or near, the instrument. The propellants may chemically attack the plastic.
WARNING: If a Low Battery Condition is indicated prior to a dive, DO NOT attempt to dive with the ATMOS ai until the Battery is replaced. INSPECTIONS AND SERVICE Your ATMOS ai should be inspected annually by an Authorized AERIS Dealer who will perform a factory prescribed function 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).
To Obtain Service Take you ATMOS ai to an Authorized AERIS Dealer or send it to the nearest AERIS Regional Distributor Facility. To return your ATMOS ai to AERIS: Record all dive data in the Log and/or download the data in memory. All data will be erased when it receives factory service. Package it using a protective cushioning material.
Inspect the Buttons, Lens, and Housing to ensure they are not cracked or damaged. If there is any sign of moisture in the module, DO NOT use the ATMOS ai until it receives proper service by an Authorized Aeris Dealer, or the Aeris factory. WARNING: If damage, moisture, or corrosion is found, it is recommended that you return your ATMOSai to an Authorized AERIS Dealer, and DO NOT attempt to use it until it has received factory prescribed service.
Closely check the threads of the Battery Hatch and the Housing for any signs of damage that might impair proper threading. If found, return your module to your Authorized Aeris Dealer, and DO NOT attempt to use it until it has received factory service. WARNING: DO NOT attempt to disassemble any other portion of the module. Doing so may cause a dangerous malfunction, resulting in possible injury or death. Indication of tampering with the module will void the unit's warranty. a Fig.
O-Ring Installation Lightly lubricate a new (recommended) Hatch O-ring with silicone grease, then stretch it slightly to work it over the slotted top of the Battery Hatch. DO NOT roll it over the treads. Ensure that it is evenly seated. NOTE: This O-ring must be a genuine AERIS part that can be purchased from an Authorized AERIS Dealer. Use of any other O-ring will void the warranty. + Fig.
Inspection Activate the unit and watch carefully as it performs a full diagnostic and Battery check, and enters Surface Mode. Observe the LCD display to ensure it is consistently clear and sharp in contrast throughout the screen. WARNING: If any portions of the display are missing or appear dim, or a Low Battery Condition is indicated, return your ATMOSai to an Authorized AERIS Dealer for a complete evaluation before attempting to use it.
REFERENCE 95
DECOMPRESSION MODEL The Decompression Model used by the ATMOS ai is based on the no decompression multilevel repetitive dive schedules successfully tested by Dr. Ray Rogers and Dr. Michael Powell. These tests did not include repetitive dives deeper than 90 feet (27 meters) or decompression dives. Due to the present unavailability of statistical data, ATMOS ai decompression predictions are based on U.S. Navy theory.
NO DECOMPRESSION LIMITS (NDLS) Note how the No Decompression Limits for the ATMOS ai are contrasted with the U.S. Navy limits (Fig. 93). The ATMOS ai'S Dive Planner does not scroll past 190 feet (57 meters), or to depths at which projected dive time is less than one minute . WARNINGS: Using the ATMOS ai, just as using the U.S. Navy (or other) No Decompression Tables, is no guarantee of avoiding decompression sickness (i.e., the bends). AERIS advocates responsible diving practices .
OXYGEN EXPOSURE LIMITS (OTLS) Predicted exposure limits and oxygen calculations of the ATMOS ai are based on maximum exposure durations published by the National Oceanic and Atmospheric Administration in the October 1991 NOAA Diving Manual (Fig. 94). Both central nervous system (CNS) oxygen toxicity and pulmonary oxygen toxicity were taken into consideration when the limits were published by NOAA.
Diving with enriched nitrogen-oxygen (nitrox) mixtures requires special knowledge of the variations imposed upon divers, their activities, and their equipment by the increased percentage of oxygen. AERIS recommends completion of a specialized Nitrox training course by a recognized training agency prior to diving with any enriched nitrogen-oxygen (nitrox) mixtures.
The ATMOS ai senses ambient pressure when it is activated, every 15 minutes while it is activated, or every 30 minutes when it is not activated. At an Altitude of 2,000 feet (610 meters), it will automatically recalibrate itself to measure depth in feet of 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).
Since the 1990 UHMS guidelines were introduced, data from the Divers Alert Network (DAN) was introduced that resulted in DANs 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 airliner (altitude up to 8,000 feet/2,440 meters).
SPECIFICATIONS CAN BE USED AS Air Computer Nitrox Computer Digital Depth Gauge/Timer NO DECOMPRESSION MODEL Basis: Modified Haldanean Algorithm 12 tissue compartments OPERATIONAL MODES Activation/Diagnostic Surface Dive Planner Time to Fly Countdown Desaturation Countdown Dive Log (Date / Time, Nitrogen, Oxygen) Set Mode 1: FO2 (Air, 21 - 50 %) Max Depth Alarm (30 - 330 ft /9-99 m) Elapsed Dive Time Alarm (0:10 - 3:00 hr:min) PC Interface (to Download data) Set Mode 2:
SPECIFICATIONS (CONTINUED) OPERATIONAL MODES (continued) No Decompression Dive: #1 - Current Depth, Dive Time Remaining, Max Depth, Elapsed Dive Time, Tank Pressure, Bar Graphs #2 - Current Depth, Dive Time Remaining, Temperature, Time of Day, Tank Pressure, Bar Graphs #3 - (only if a nitrox dive) - Current Depth, Dive Time Remaining, Current PO2, Tank Pressure, Bar Graphs Secondary - Current Depth, Air Time Remaining, Max Depth, Elapsed Dive Time, Tank Pressure, Bar Graphs Safety Stop - Current
SPECIFICATIONS (CONTINUED) DISPLAY RANGES/RESOLUTION (continued) Numeric Displays: Time to Fly Time to Desaturate Temperature Range: 23:50 - 0:00 hr:min* (* starting 10 min after the dive) 23:50 - 0:00 hr:min* (* starting 10 min. after the dive) 0 to 99°F (-9 to 60°C) Special Displays: Diagnostic Display Out of Range (- - -) Gauge Mode Countdown Timer Resolution: 1 minute 1 minute 1° Occurrence After Manual Activation >330 feet (>99.
SPECIFICATIONS (CONTINUED) OPERATIONAL PERFORMANCE Function: Depth Timers Accuracy: ±1% of full scale 1 second per day Dive Counter: Displays Dives #1 to 24, 0 if no dive made yet Resets to Dive #1, upon reactivation after shutdown Dive Log Mode: Stores 24 most recent dives in memory for viewing After 24 dives, adds 25th dive in memory and deletes the first dive Altitude: Operational from sea level to 14,000 feet (4,267 meters) elevation Compensates for Altitude at elevations higher than 2
SPECIFICATIONS (CONTINUED) OPERATIONAL PERFORMANCE (continued) Activation: Manual - push button (recommended) Automatic - by immersion in water (as a backup, if set ON) H2O graphic indicates Wet Contacts are bridged (unit must be dried prior to transport or storage). Cannot be manually activated deeper than 4 feet (1.2 meters), if the Water Activation feature is set OFF.
GLOSSARY Air Dive - A dive conducted using air (approximately 21% oxygen & 79% nitrogen) as the breathing gas. Algorithm - A step-by-step mathematical formula designed to accomplish a particular result (i.e. Dive Time Remaining in the ATMOS ai). Alternate Display - Additional information accessible by pressing a control button. Altitude Dive - A dive made at an elevation above sea level (2,000+ ft. / 610+ m.) where a different set of no decompression tables is used .
GLOSSARY (CONTINUED) Elapsed Dive Time - The total time spent underwater during a dive between 5 feet (1.5 meters) on initial descent to 3 feet (1 meter) on final ascent. FO2 - The fraction (percent / 100) of oxygen (O2) in the breathing gas mixture. Icon - a small pictorial representation of an operational mode LCD - Abbreviation for liquid crystal display, an easily viewed low voltage display usually found on dive computers Maximum Depth - The deepest depth attained during a dive.
INSPECTION / SERVICE RECORD O DI Purchased from ______________________ RESP Date of purchase _____________________ VER Serial Number _______________________ N SI LE B Below to be filled in by an Authorized AERIS Dealer: Date Inspection / Service Performed Dealer / Technician 109
NOTES 110
RESET FEATURE This dive computer is configured with a RESET feature that allows data to be cleared, including Nitrogen and Oxygen calculations, FO2 set point, Log Mode entries, and Download data. WARNING: Reset after a dive and subsequent use for a repetitive dive conducted by the same diver could result in serious injury to or death.
AERIS 14212 Doolittle Drive San Leandro, CA 94577 Tel: 510/346-0010 Fax: 510/346-0015 Web site: http://www.diveaeris.com E-mail: info@diveaeris.com © 2002 Design 2002 Doc. No.
