DAVIS | Trip 500AL | Specifications | DAVIS Trip 500AL Specifications

DAVIS Trip 500AL Specifications
500AI
™
owner's guide
RESPONSIBLE COMPUTER DIVING
• 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
• Check Your Computer Often During the Dive
• Do A Safety Stop on Every Dive
• Allow Adequate Surface Interval Between Each Dive
• Allow Adequate Surface Interval Between Each Day
of Diving (12 Hours or Until Your Computer Clears)
Read And Understand This Owner's Guide
Thoroughly Before Using the 500AI.
Responsible
ii
500AI
Pay special attention to items marked with this Warning symbol.
WARNINGS:
• The 500AI 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 is intended only for no decompression diving, NOT intentional decompression diving.
• 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 enriched nitrogen-oxygen (nitrox) mixtures.
• You must obtain scuba certification, and certification in diving with enriched nitrogen-oxygen
mixtures (nitrox) before using the 500AI if you have not already done so.
• It is NOT for use by military and commercial divers.
• It should NOT be utilized for any competitive, or repetitive square wave or decompression diving, as
it is intended solely for recreational use and no decompression multilevel diving.
• As with all underwater life support equipment, improper use or misuse of this product can cause
serious injury or death.
• Never participate in sharing or swapping of a dive computer.
• Conduct your dives in such a manner so as to insure that you continuously check the computer's
proper function.
• Read and understand this owner’s guide completely before diving with the 500AI.
• If you do not fully understand how to use this dive computer, or if you have any questions, you should
seek instruction in its use from your authorized AERIS dealer before you utilize this product.
iii
LIMITED TWO-YEAR WARRANTY
For details, refer to the Product Warranty Registration Card provided.
COPYRIGHT NOTICE
This owner’s 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.
500AI Owner's Guide, Doc. No. 12-7112
© 2002 Design 1999
2002 Davis Street
San Leandro, Ca. USA 94577
510/569-3100
TRADEMARK NOTICE
AERIS, the AERIS logo, 500AI, and the 500AI logo are all registered and unregistered trademarks of AERIS. All rights are reserved.
PATENT NOTICE
U.S. Patents have been issued, or applied for, to protect the following design features:
Dive Time Remaining (U.S. Patent no. 4,586,136), Data Sensing and Processing Device (U.S. Patent no. 4,882,678), and Ascent Rate
Indicator (U.S. Patent no. 5,156,055).
DECOMPRESSION MODEL
The programs within the 500AI 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 500AI dive computer model is based upon the latest research and experiments
in decompression theory. Still, using the 500AI, just as using the U.S. Navy (or other) No Decompression Tables, is no guarantee
of avoiding decompression sickness, i.e. “the bends.” 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.
iv
500AI
CONTENTS
FEATURES AND DISPLAYS .......................................................................................... 1
Introduction ................................................................................................................................. 2
Control Buttons ........................................................................................................................... 3
Informational Displays ................................................................................................................ 5
Bar Graphs ............................................................................................................................... 5
Nitrogen Bar Graph .......................................................................................................... 6
Oxygen Accumulation Bar Graph ..................................................................................... 7
Ascent Rate Indicator ........................................................................................................ 8
Tank Pressure Bar Graph ................................................................................................. 8
Alpha Numeric Displays .......................................................................................................... 9
Tank Pressure Display ...................................................................................................... 9
Depth Displays ................................................................................................................... 9
Time Displays .................................................................................................................. 10
Temperature Display ....................................................................................................... 10
Dive Time Remaining ............................................................................................................ 11
No Decompression Dive Time Remaining ..................................................................... 12
Oxygen Accumulation Time Remaining ........................................................................ 13
Breathing Gas Time Remaining ..................................................................................... 13
Backlight Feature ...................................................................................................................... 15
Audible Alarm ............................................................................................................................ 15
Operating Temperature ............................................................................................................ 18
Sharing the 500AI ..................................................................................................................... 19
LCD Key ..................................................................................................................................... 20
v
CONTENTS (continued)
ACTIVATION AND SETUP ........................................................................................... 21
Attachment to a Regulator ....................................................................................................... 22
Activating the Display ............................................................................................................... 22
Surface Mode ......................................................................................................................... 24
Entering Settings ...................................................................................................................... 24
To Set: FO2 Default ON/OFF .............................................................................................. 25
To Set: Audible Alarm ON/OFF .......................................................................................... 25
To Set: Depth Alarm Set Point ............................................................................................ 26
To Set: Turn Pressure Set Point ......................................................................................... 27
To Set: End Pressure Set Point ........................................................................................... 27
To Set: Units of Measure ...................................................................................................... 28
To Set: Date/Hour Format/Time ........................................................................................... 29
Sampling Rate ........................................................................................................................ 30
To Set: Sampling Rate ........................................................................................................... 31
Summary of Set Modes ............................................................................................................. 32
PREDIVE AND DIVE MODES ...................................................................................... 33
Operational Modes .................................................................................................................... 34
Temperature/Time/Date Mode ............................................................................................. 34
FO2 Mode ............................................................................................................................... 34
FO2 50% Default ............................................................................................................. 35
FO2 Set for Air ................................................................................................................ 36
Setting FO2 ...................................................................................................................... 36
FO2 Set for a Nitrox Dive ............................................................................................... 37
Plan Mode .................................................................................................................................. 37
vi
500AI
CONTENTS (continued)
No Decompression Dive Mode .................................................................................................. 40
Entering Decompression Dive Mode ........................................................................................ 41
Ascending to the Surface ........................................................................................................... 42
Altitude Diving .......................................................................................................................... 44
POST DIVE MODES ...................................................................................................... 45
Post Dive Surface Mode ............................................................................................................. 46
Transition Period ................................................................................................................... 46
After the Transition Period (The First 2 Hours) ................................................................. 47
Temperature/Time/Date .................................................................................................. 47
FO2 Mode ......................................................................................................................... 48
Time to Fly and Desaturate Countdowns ...................................................................... 48
Plan Mode ........................................................................................................................ 49
Log Mode ................................................................................................................................ 50
After the First 2 Hours ......................................................................................................... 52
Downloading Data to a PC (External Access Mode) ............................................................ 53
Summary of Post Dive Modes ................................................................................................... 54
HANDLING THE EXTREMES ...................................................................................... 55
Emergency Decompression ....................................................................................................... 56
Nitrogen Bar Graph .............................................................................................................. 56
Decompression Dive Mode .................................................................................................... 57
Breathing Gas Time Remaining During Decompression .............................................. 58
Managing Decompression Stops ........................................................................................... 59
vii
CONTENTS (continued)
Violation Modes ......................................................................................................................... 60
Oxygen Exposure ....................................................................................................................... 66
Partial Pressure of Oxygen ................................................................................................... 66
High PO2 Dive Mode ....................................................................................................... 66
High Oxygen Accumulation .................................................................................................. 67
Unexpected Loss of Displayed Information ............................................................................. 69
Summary of Extreme Dive Modes ............................................................................................ 72
CARE AND MAINTENANCE ........................................................................................ 73
Care and Cleaning ..................................................................................................................... 74
Annual Inspections and Service ............................................................................................... 75
Battery Life ................................................................................................................................ 77
Low Battery Condition .............................................................................................................. 77
Battery Replacement ................................................................................................................. 79
REFERENCE .................................................................................................................. 83
Decompression Model ................................................................................................................ 84
Multiple Tissue Tracking .......................................................................................................... 84
No Decompression Limits ......................................................................................................... 86
Oxygen Exposure Limits ........................................................................................................... 87
Altitude Diving .......................................................................................................................... 88
Flying After Diving .................................................................................................................... 90
Specifications ............................................................................................................................. 92
Glossary ...................................................................................................................................... 95
500AI Service Record ................................................................................................................ 98
viii
500AI
FEATURES
and
DISPLAYS
1
INTRODUCTION
Welcome to AERIS and thank you for choosing the 500AI!
Your new 500AI is an integrated system that will be installed into a high pressure port of your regulator first stage.
DI
RESP
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Your 500AI presents the information that you need before, during, and after
your air (or nitrox) dives using an intuitive combination of easy to read displays and unique identification icons. Tissue loading of nitrogen, accumulation
of oxygen, and ascent rate are presented as segmented bar graphs beside color
coded reference indicators that bring quick focus to these important status displays. In addition, tank pressure is displayed in graphic and numerical formats on the screen.
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Be a RESPONSIBLE DIVER
at all times.
2
As you progress through this instructional guide, you will become familiar with
all of the unique functions and features available and see examples of the displays that you could expect to see in the various operational modes. Refer to
the Glossary of terms in the back of this manual, and keep the waterproof Review Card handy during your dive trips. Although it will require an initial investment of time to become acquainted with the various icons and bar graphs,
you’ll soon agree that the 500AI is easy to understand and use.
500AI
Remember that the rules you learned in your basic scuba certification course
still apply to the diving you will do while using a dive computer - some will become even more important. Technology is no substitute for common sense,
and a dive computer only provides the person using it with data, not the
knowledge to use it.
NOTE: Throughout this owner's guide reference is made to the
term 'breathing gas'. The rational being that the 500AI can be
used for 'air' dives or 'nitrox' dives. For clarity these terms are
defined as Breathing Gas - the gaseous mixture breathed during a dive.
Air - a breathing gas that contains approximately 21% oxygen and 79%
nitrogen (nature's common nitrogen-oxygen mixture).
Nitrox - a nitrogen-oxygen breathing gas that contains a higher fraction
of oxygen (22 to 50%) than air.
CONTROL BUTTONS
The 500AI is a unique dive computer with interactive controls that allow you
to select various display options and access specific information when you
choose to see it. The Advance (Left) and Select (Right) control buttons (Fig.
1) can be pressed repeatedly, or held in to scroll as you define settings or access
different display modes.
Advance
Select
Fig. 1 - Control Buttons
3
While on the surface, you can access the following Modes and perform the following operations using the control buttons:
Responsible
• Activate the Display Module
• Activate the Backlight
• View current Temperature, Time, and Date
• Set FO2 to the percentage of oxygen in the nitrox mix being used.
• View Time to Fly and Time to Desaturate
• Scroll through the Plan mode to view no decompression limits.
• Scroll through Log mode to view data from your recent dives.
• Turn the FO2 50% Default on or off.
• Turn the Audible Alarm on or off.
• Select the Depth Alarm.
• Select the Turn Gas Pressure Alarm.
• Select the End Gas Pressure Alarm.
• Select Units of Measure (English or Metric values) to be viewed.
• Initiate Download of data to a PC program.
• Set the Date, Time Format, and Time.
• Select the Sampling Rate for data to be downloaded.
During Dive modes, the Select (Right) button can be used to activate the
display's backlight, and the Advance (Left) button can be used to access an Alternate display that provides additional information for the dive.
4
500AI
INFORMATIONAL DISPLAYS
Operational modes and status information is visually represented numerically
and/or graphically and can be understood at a glance with the aide of Universal
Icons (Fig. 2) that identify and bring quick focus to the displays. Also, segmented
bar graphs will show how close you are to critical limits. In critical situations, an
audible alarm sounds to alert you to check your display.
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.
2000
3000
1000
140
0
4000
210
280
70
0
350
5000
O2
Fig. 2 - Universal Icons
BAR GRAPHS
There are four segmented bar graphs that appear on the screen (Fig. 3). The
three around the perimeter are located next to green, yellow, and red color
coded portions of the peripheral decal which denote normal, caution, and danger zones, respectively. When underwater, you can quickly focus on the bar
graphs to make sure that they are in the green. You can quickly verify that
you're not getting too close to the no decompression limit or the oxygen tolerance limit, or ascending too fast, or running low on breathing gas.
2000
3000
1000
140
70
0
0
4000
210
280
350
5000
Fig. 3 - Bar Graphs
5
Nitrogen Bar Graph
The Nitrogen Bar Graph (Fig. 4) represents nitrogen loading, showing your
relative no decompression/decompression status. As your depth and elapsed
dive time increase, segments will add to the graph beginning in the lower left
portion of the screen. As you ascend to shallower depths, this bar graph will
begin to recede, indicating that additional no decompression time is allowed for
multilevel diving.
a b
The Nitrogen Bar Graph monitors 12 different nitrogen compartments simultaneously and displays the one that is in control of your dive at that time. It is
divided into a green No Decompression zone, a yellow Caution zone (no decompression), and a red Decompression zone. The yellow Caution Zone (Fig. 4a)
provides a visual representation of how close you are to the no decompression
limit, allowing you to make a decision regarding safety stop duration or necessity. 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.
The Nitrogen Bar Graph also assists you with managing decompression by filling a large red 'ceiling stop required' segment (Fig. 4b).
Fig. 4 - Nitrogen Bar Graph
6
500AI
WARNING: AERIS advocates responsible diving practices consistent with your individual level of formal training and experience, and does not recommend decompression diving or diving
below 130 feet (39 m).
Oxygen Accumulation (O2) 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'.
The Oxygen Accumulation (O2) Bar Graph (Fig. 5) represents oxygen loading,
your relative oxygen tolerance dosage (OTU), showing the maximum of either
per dive allowable oxygen, or 24 hour period allowable oxygen. As your exposure (accumulation of oxygen) increases during the dive, segments will add to
the bar graph starting in the lower right portion of the screen. As oxygen loading decreases, the bar graph will begin to recede, indicating that additional exposure (accumulation) is allowed for that dive, and that 24 hour period.
The O2 Bar Graph also assists you with managing high partial pressure of oxygen (PO2) by flashing the large red Danger zone segment (Fig. 5a) as a warning when the level of PO2 exceeds the maximum allowed limit of 1.60 ATA .
This is explained in detail later in the Handling the Extremes section.
a
Fig. 5 - Oxygen (O2)
Bar Graph
7
ARI Segments = Ascent Speed
0 = 0 - 20 fpm (0 - 6 mpm)
1 = 21 - 30 fpm (6.5 - 9 mpm)
2 = 31 - 40 fpm (9.5 - 12 mpm)
3 = 41 - 50 fpm (12.5 - 15 mpm)
4 = 51 - 60 fpm (15.5 - 18 mpm)
5 = 61 + fpm (18.5 + mpm)
(when 5, all segments will flash)
Pressure BG Segments =
• 250 PSI (17.5 BAR) - when below
1000 PSI (70 BAR)
• 500 PSI (35 BAR) - when above
1000 PSI (70 BAR)
a
b
2000
3000
1000
140
70
0
0
Ascent Rate Indicator
The Ascent Rate Indicator (Fig. 6a) is provided to help you avoid excessive ascent rates by providing a visual representation of ascent speed, rather than
just showing that you are ascending too fast.
The 5 triangular segments of the bar graph, located beside green, yellow, and
red reference zones, appear beginning from the left and may be considered an
ascent rate speedometer. Green is a 'normal' rate, yellow is a 'caution' rate,
and red is 'Too Fast'. The actual speeds that the segments represent are
shown at the left.
When your ascent rate exceeds the maximum recommended rate of 60 feet (18
meters) per minute, the bar graph segments will enter the red zone and all displayed segments will flash once per second until your ascent speed is slowed.
When this occurs, you should immediately slow your ascent.
4000
210
280
350
5000
The Ascent Rate Indicator has been granted U.S. Patent No. 5,156,055.
Tank Pressure Bar Graph
Fig. 6 - Ascent Rate
Indicator and Tank Pressure
Bar Graph
8
Segments of the Tank Pressure Bar Graph(Fig. 6b) appear on the display
when the 500AI is connected to a pressurized cylinder and in the Surface Mode
or Dive Mode. The value of segments is shown at the left.
500AI
ALPHA/NUMERIC DISPLAYS
Tank Pressure Display
2000
While on the surface, tank pressure will also be displayed numerically below
the bar graph (Fig. 7).
3000
1000
140
0
4000
210
280
70
0
350
5000
PSI
During a dive, the numerical value can be viewed as an Alternate Display by
pressing the Advance (Left) control button.
Values of pressure are displayed from 10 PSI (.5 BAR) up to 5000 PSI (350
BAR) in increments of 10 PSI ( .5 BAR).
Fig. 7 - Tank Pressure
Depth Displays
During a dive, the Current Depth (Fig. 8a) and the Maximum Depth
reached during that dive (Fig. 8b) are displayed from 0 to 330 feet (99.5
meters) in 1 foot (.5 meter) increments.
a
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
During a Decompression Dive, the required Ceiling Stop Depth is displayed
in place of Maximum Depth. Stop Depths from 60 up to 10 feet (20 to 3
meters) are shown in 10 foot (3 meter) increments.
b
Fig. 8 - Depth Displays
9
Time Displays
a
2000
3000
1000
140
70
0
0
FT
4000
210
Time displays (Fig. 9 a, b, & c) are shown in hour:minute format (i.e. 1:02 represents one hour and two minutes, not 102 minutes!).
280
350
5000
FT
MAX
c
b
Fig. 9 - Time Displays
The colon that separates hours and minutes blinks once per second when the
display is indicating real time such as elapsed Surface Time, Elapsed Dive
Time, or Time of Day.
Dive Time Available, Dive Time Remaining, Decompression Stop Time, Total
Ascent Time required, Time to Fly, or Desaturation Time are calculated projections of time and use a solid (non-blinking) colon to indicate that they are
counting down, rather than counting up.
Temperature Display
Ambient Temperatures from 0° to 99°F (-9° to 60°C) are displayed together
with Time of Day and Date when the Advance (Left) button is pressed while in
the Surface Mode (Fig. 10) or a dive mode.
Fig. 10 - Temperature
(on surface)
10
NOTE: The alpha/numeric displays will be illustrated and described in more detail as applicable for the various operating
modes described throughout this owner's guide.
500AI
DIVE TIME REMAINING
One of the most important pieces of information on the 500AI is the patented
Dive Time Remaining numeric display (Fig. 11a). To numerically display Dive
Time Remaining, the 500AI constantly monitors two critical pieces of information; no decompression status and oxygen accumulation status.
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 of the two).
This unique feature has been granted U.S. Patent No. 4,586,136.
The specific time being displayed is identified by the No Decompression Dive
Time icon or the Oxygen Accumulation Time icon displayed to the right of the
numeric display.
a
2000
3000
1000
140
70
0
Simultaneously, Breathing Gas Time Remaining (Fig. 11b) and its identifying
icon are displayed below the Tank Pressure Bar Graph.
0
FT
4000
210
280
350
5000
FT
MAX
b
Fig. 11 - Dive Time
Remaining (No Deco)
11
No Decompression Dive Time Remaining
No Decompression Dive Time Remaining is the maximum amount 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 twelve hypothetical tissue compartments. The rates each of these compartments absorb and
release nitrogen is mathematically modeled and compared against a maximum
allowable nitrogen level. Whichever one of the twelve is closest to this maximum level is the controlling compartment for that depth. Its resulting value
will be displayed numerically (Fig. 12a) along with the No Decompression Dive
icon and graphically as the Nitrogen Bar Graph (Fig. 12b).
b
a
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
Fig. 12 - No Decompression
Dive Time Remaining
12
As you ascend from depth following a dive that has approached the no decompression limit, the Nitrogen Bar Graph will diminish as control shifts to slower
compartments. This is a feature of the decompression model that is the basis
for multilevel diving, one of the most important advantages the 500AI offers.
The no decompression algorithm is based upon Haldane’s 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.
500AI
Oxygen Accumulation Time Remaining
Oxygen accumulation (exposure) during a dive, or 24 hour period, appears
graphically as the O2 Bar Graph (Fig. 13a). As time remaining before reaching
the oxygen exposure limit decreases, segments are added to the O2 bar graph.
When the amount of time remaining before reaching the oxygen limit becomes
less than the No Decompression Dive Time Remaining, calculations for the
dive will be controlled by oxygen. Oxygen Time Remaining will then appear as
the main numeric time display (Fig. 13b) as signified by the O2 icon appearing
to the right of the display.
As oxygen accumulation continues to increase, the O2 bar graph will enter the
yellow Caution Zone. High O2 Mode is explained in detail later in the Handling the Extremes section.
Breathing Gas Time Remaining
2000
3000
1000
140
70
The 500AI calculates Breathing Gas Time Remaining using a patented algorithm that is based on a diver's individual breathing gas consumption rate and
current depth. Tank pressure is measured once each second, and an average
rate of consumption is calculated over a 90 second period. This rate of consumption is then used in conjunction with a knowledge of the depth dependence to predict the breathing gas required for the diver to make a safe controlled ascent including any required decompression stops.
a
b
0
0
FT
4000
210
280
350
5000
O2
FT
MAX
Fig. 13 - O2 Accumulation
Time Remaining
13
Breathing gas consumption and depth are continuously monitored, and
Breathing Gas Time Remaining reflects any change in your 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 500AI will recognize this change and adjust your Breathing
Gas Time Remaining accordingly.
Remember, the Breathing Gas Time Remaining is the time you can remain at
the present depth and still safely surface with the tank pressure reserve that
you select during setup (End Gas Alarm Set Point).
b
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
a
Fig. 14 - Breathing Gas
Time Remaining
14
When Gas Time Remaining indicates zero (Fig. 14a), you should immediately
initiate a controlled ascent while monitoring your tank pressure (Fig. 14b).
However, there is no reason to panic, the 500AI has allowed for the breathing
gas necessary for a safe ascent including any emergency decompression stops
required.
For example:
• You set the End Gas Alarm for 300 PSI (20 BAR)
• You are at a depth of 60 feet (20 meters)
• Gas Time Remaining decreases to 0:00
• You ascend at a maximum rate of 60 fpm (20 mpm)
• You surface with 300 PSI (20 BAR) pressure remaining in your tank
500AI
BACKLIGHT FEATURE
In addition to using a high contrast LCD for easy readability in low light conditions, the 500AI Backlight feature evenly and easily illuminates the full display. Upon activation the Backlight will illuminate the display while the unit
performs its diagnostic check.
To activate the Backlight while on the surface or during a dive, press the Select (Right) button (Fig. 15). On the surface the display will be illuminated for
10 seconds. While in a dive mode, the display will remain illuminated as long
as the button is depressed, plus 10 seconds after being released. Additional
illumination time can be obtained by pressing the button again.
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
Fig. 15 - Backlight
NOTE: Extensive use of the Backlight reduces estimated battery life. Also, the Backlight will not activate during a Low
Battery condition or while downloading data to a PC.
AUDIBLE ALARM
One Short Beep = Transition
P!
Emitted after activation and a diagnostic check, prior to Surface Mode.
BEE
15
One Double Beep = Potential Danger
P!
BEE EP!
BE
During situations that may pose potential danger, one Double Beep is emitted
from the 500AI. These situations include:
• Entry into decompression.
• Breathing Gas Time Remaining decreasing to 5 minutes.
• Partial pressure of oxygen (PO2) equal to or greater than 1.40 ATA.
Continuous One Beep per Second = Immediate Danger
P...
BEE EP...
BE EP...
BE
16
When the 500AI senses immediate danger to you, it emits One Beep per Second until the situation is corrected, if the Audible Alarm feature is set ON (described later). If the Audible Alarm feature is set OFF, you will be alerted instead by one Double Beep. Immediate Danger situations include:
• Ascending to a depth shallower than a Required Stop Depth.
• Upon surfacing, if shallower than a Required Stop Depth for less than 5
minutes.
• Partial pressure of oxygen (PO2) equal to or greater than 1.60 ATA.
• Ascending at a rate that exceeds 60 fpm (18 mpm).
• Descending deeper than the Depth Alarm Set Point.
• Gas Time Remaining equals zero (0:00).
• Oxygen accumulation greater than the allowed per dive or 24 hour limit.
500AI
Single Long Beep = Permanent Violation
If you enter a Delayed or Immediate Violation Mode, a Single Long Beep will
be emitted. This will occur if one of these Violation rules are broken:
• Depth is shallower than the Required Stop Depth for more than 5 minutes.
• 5 minutes after surfacing if shallower than a Required Stop Depth.
• Required Stop Depth equal to or greater than 70 FT/ 21 M.
• 5 minutes after surfacing from a dive in which a Delayed Violation occurred (described later).
Six Beeps = Breathing Gas Alarm
This will occur when Tank Pressure decreases to the Turn Gas Alarm set point
that you select during setup.
!
EEP
EE
BEE
P...
BEE EP...
BE EP...
BE EP...
BE EP...
BE EP...
BE
17
OPERATING TEMPERATURE
The 500AI will operate in almost any temperature diving environment in the
world (Fig. 16) between 32° and 140°F (0° and 60°C).
At extremely low temperatures, the LCD may become sluggish, but this will
not affect it's accuracy. If stored or transported in extremely low temperature
areas (below freezing), you should warm the module and its battery with body
heat before diving.
140°F (60°C)
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
32°F (0°C)
Fig. 16 - Operating
Temperature Range
18
Even though the 500AI will operate in this wide range of temperatures, it is
possible to damage the electronics if left exposed to direct sunlight,
or in a hot confined space (like a car trunk). After a dive, cover the
500AI and keep it out of the sun.
If inadvertently left in the direct sunlight for a long period, the LCD display
may become totally black. If this occurs, immediately immerse the Display
Module in water. The display should recover its normal appearance after a few
minutes.
NOTE: Damage from excess heat, or cold, is not covered by the
500AI two year limited warranty.
500AI
SHARING THE 500AI
WARNING: Never participate in sharing or swapping of a dive
computer. Doing so may result in injury or death.
This rule applies to the use of all dive computers, but is especially important when using the 500AI, due to the personal information it provides.
O
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It is impossible for two divers to stay precisely together underwater,
and your computer's dive profile tracking of previous dives will be
pertinent to you only. Nitrogen and oxygen loading of a second user
may be significantly different and thus swapping dive computers
could lead to inaccurate and potentially dangerous predictions of decompression and oxygen accumulation status.
VER
The 500AI provides information based upon a diver’s personal dive
profile, and therefore must not be “shared” between divers. You
should never, under any circumstances, swap your computer with another unit between dives, or share your computer with another diver
underwater.
N SI LE
B
Be a RESPONSIBLE DIVER
at all times.
19
c
k
j
l
m
b
d
2000
3000
1000
140
70
a
0
0
M
FT
4000
210
e
280
350
5000
O2
M
FT
MAX
BAR
PSI
i
f
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
n.
o.
p.
Nitrogen Bar Graph
Tank Pressure Bar Graph
Ascent Rate Indicator
Oxygen Loading Bar Graph
Icon - Operating Mode (detail A)
Icon - Elapsed Dive Time
Icon - Deco Stop Ceiling
Icon - Maximum Depth
Icon - Breathing Gas Time Remaining
Icon - Low Battery
Icon - Audible Alarm
Icon - Log Mode
Icon - Temperature
Control Button - Select
Sensors - Download
Control Button - Advance
g
p
o
h
n
Detail 'A' - Operating Mode Icons
Surface
LCD Key
20
Plan
No Deco
Deco
O2 Time
O2
500AI
ACTIVATION
and
SETUP
21
ATTACHMENT TO A REGULATOR
Before you dive with the 500AI for the first time, it must first be connected to
a high pressure port of your regulator first stage. AERIS strongly recommends
that installation be performed by an Authorized AERIS Dealer.
NOTE: The 500AI is compatible with most regulator first
stages, but cannot be guaranteed to fit certain models. Check
with your Authorized AERIS Dealer to verify compatibility with
your regulator first stage at the time of purchase.
ACTIVATING THE DISPLAY
22
DI
RESP
O
VER
Connect the regulator assembly to a full tank and pressurize by slowly opening
the tank valve. It is not necessary to pressurize the unit in order to enter settings, access information such as the Log, or to download data to a PC.
N SI LE
B
WARNING: Never attempt to activate the 500AI underwater.
This may result in inaccurate depth and no-decompression time
displays. If activated deeper than 4 feet (1 meter) underwater
or at elevations higher than 14,000 feet (4,267 meters), the unit
will perform a diagnostic test then immediately shut off.
500AI
To activate the 500AI • press the Select (Right) button once and release.
The 500AI will immediately enter Diagnostic Mode, displaying all “8’s”, followed by “dashes”, and then a countdown from 9 to 0 (Fig. 17). The backlight
will illuminate the display throughout the diagnostic check as display functions and battery voltage are checked to ensure that everything is working
properly. A single beep will be emitted to indicate successful completion.
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 in 'feet of fresh water' instead of 'feet of sea
water'.
WARNING: If the Low Battery icon appears on display following diagnostics, AERIS strongly recommends that you DO NOT
dive until the battery is replaced. See the battery replacement
procedure on page 79.
2000
3000
1000
140
70
0
0
M
FT
4000
210
280
350
5000
O2
BAR
PSI
M
FT
MAX
If no dive is made within 2 hours after initial activation, the 500AI will automatically deactivate to conserve its battery power.
Always check the display before entering the water to verify
that it is activated and functioning properly.
Fig. 17 - Diagnostic Mode
23
WARNING: During activation, diagnostics, and operation, if
any display varies from the information presented here, return
the 500AI to your AERIS Dealer for inspection.
SURFACE MODE
Surface Mode, identified by the Surface Time icon (Fig. 18a), immediately follows Diagnostic Mode after initial activation. It also appears after a dive when
you ascend shallower than 3 feet (1 meter). Information displayed includes the
Dive Number '0' (no dive made yet), Surface Time with flashing colon and icon,
and tank Pressure (bar graph and digital display).
a
2000
3000
1000
140
70
0
0
4000
210
280
350
5000
PSI
Fig. 18 - Surface Mode
24
ENTERING SETTINGS
• The Advance (Left) button is used to gain access to settings.
• The Select (Right) button is used to toggle between, or scroll through, the
individual set points available for each of the settings.
• The Advance (Left) button is then used to accept and save the set point
and revert to Surface Mode, or continue to the next setting.
• See page 32 for a summary of Modes and Settings.
NOTE: While in the Set Mode, if neither button is pressed during a period of two minutes, the 500AI will automatically revert
to the Surface Mode.
500AI
TO SET: FO2 50% DEFAULT ON/OFF (described on page 35)
'ON' - FO2 value set point reverts to 50% after dives (must be set each dive)
'OFF' - FO2 value set point remains at the % set until changed or shut down
•
•
•
•
press BOTH buttons simultaneously, while in Surface Mode
FO2 50 appears with 'On', or 'Off', flashing (Fig. 19)
press Select (Right) button to toggle between 'On' and 'Off'
press Advance (Left) button to accept the setting displayed, and either • revert to Surface Mode (if this setting was changed), or • advance to Set:Audible Alarm (if this setting was not changed)
Fig. 19 - Set FO2 Default
TO SET: AUDIBLE ALARM ON/OFF
'ON' - alarms will be sounded for all conditions as listed on pages 15 - 17
'OFF' - alarms are silenced, except for immediate danger (see page 16)
•
•
•
•
•
press BOTH buttons simultaneously, while in Surface Mode
press Advance (Left) button 1 time
the Audible Alarm icon appears with 'On', or 'Off', flashing (Fig. 20)
press Select (Right) button to toggle between 'On' and 'Off'
press Advance (Left) button to accept the setting displayed, and either • revert to Surface Mode (if this setting was changed), or • advance to Set:Depth Alarm (if this setting was not changed)
Fig. 20 - Set Audible
25
TO SET: DEPTH ALARM SET POINT
The Depth Alarm can be set to values between 30 feet (10 meters) and 320 feet
(97.5 meters) in 10 foot (3/3.5 meter) increments.
• press BOTH buttons simultaneously, while in Surface Mode
• press Advance (Left) button 2 times
• Max Depth and Audible Alarm icons appear with the Max Depth value
flashing (Fig. 21)
• press Select (Right) button until the desired Depth Alarm value appears
• press Advance (Left) button to accept the setting displayed, and either • revert to Surface Mode (if this setting was changed), or • advance to Set: Turn Pressure Alarm (this setting was not changed)
Example of Tank Pressure Alarm Set Points (described on next page):
FT
MAX
Fig. 21 - Set Depth Alarm
26
Starting with 3000 PSI (206.5 BAR) in your tank, set the Turn Pressure Alarm
for 2000 PSI (137.5 BAR) and the End Pressure Alarm for 1000 PSI (68.5
BAR). This allows for 1000 PSI (68.5 BAR) going out, 1000 PSI (68.5 BAR)
used coming back, and 1000 PSI (68.5 BAR) reserve.
The Turn Pressure Alarm can be disabled by setting the value at '00'.
500AI
TO SET: TURN PRESSURE ALARM SET POINT
The Turn Pressure Alarm can be set to values between 1000 PSI (68.5 BAR)
and 3000 PSI (206.5 BAR) in 250 PSI (17 BAR) increments to alert you.
•
•
•
•
•
press BOTH buttons simultaneously, while in Surface Mode
press Advance (Left) button 3 times
the Alarm icon and 'trn' appear with the Pressure value flashing (Fig. 22)
press Select (Right) button until the desired Pressure Alarm value appears
press Advance (Left) button to accept the setting displayed, and either • revert to Surface Mode (if this setting was changed), or • advance to Set: End Pressure Alarm (this setting was not changed)
PSI
Fig. 22 - Set Turn Pressure
TO SET: END PRESSURE ALARM SET POINT
The End Pressure Alarm can be set to values between 300 PSI (20 BAR) and
1000 PSI (68 BAR) in 100 PSI (6 BAR) increments to warn you.
• press BOTH buttons simultaneously, while in Surface Mode
• press Advance (Left) button 4 times
• the Alarm icon and 'End' appear with the Pressure value flashing (Fig. 23)
• press Select (Right) button until the desired Pressure Alarm value appears
• press Advance (Left) button to accept the setting displayed, and either • revert to Surface Mode (if this setting was changed), or • advance to Set: Units of Measure (this setting was not changed)
PSI
Fig. 23 - Set End Pressure
27
TO SET: UNITS OF MEASURE
FT
PSI
FT
Fig. 24 - Set Units
•
•
•
•
•
press BOTH buttons simultaneously, while in Surface Mode
press Advance (Left) button 5 times
the Units of Measure icons appear flashing (Fig. 24)
press Select (Right) button to toggle between 'FT, °F' and 'M, °C'
press Advance (Left) button to accept the setting displayed, and either • revert to Surface Mode (if this setting was changed), or • advance to EA Mode (this setting was not changed)
EA MODE
Although included in the menu structure, External Access (EA) Mode has no
settings. It is accessed only when data is being downloaded (copied) to the
Dive Downloader PC software program for storage and viewing.
EA Mode is described on page 53 in the Post Dive Mode section.
• press Advance (Left) button to 'bypass EA Mode' (Fig. 25) and revert to
Surface Mode
Fig. 25 - EA Mode
28
500AI
TO SET: DATE/HOUR FORMAT/TIME
a
Date (Year, Month, Day), Time Format, and Time (hour, minute) can be set in
sequence as described here (once Year has been accessed), or any one can be
accessed and modified by bypassing those you don't want to change.
• press BOTH buttons simultaneously, while in Surface Mode
• press Advance (Left) button 5 times
• the Date appears with the Year setting (Fig. 26a) flashing
• press Select (Right) button until the correct Year appears
• press Advance (Left) button 1 time to accept the setting displayed
• the Month setting (Fig. 26b) flashes
• press Select (Right) button until the correct Month appears.
• press Advance (Left) button 1 time to accept the setting displayed
• the Day setting (Fig. 26c) flashes
• press Select (Right) button until the correct Day appears.
• press Advance (Left) button 1 time to accept the setting displayed
b
c
Fig. 26 - Set Date
• the Hour Format appears flashing (Fig. 27)
• 12 Hr format = 12: Am to 11: Pm
• 24 Hr format = 0: to 24: (hours)
• press Select (Right) button to toggle between '12' and '24'
• press Advance (Left) button 1 time to accept the setting displayed
Fig. 27 - Set Hour Format
29
•
•
•
•
•
•
the Time appears with the Hour setting (Fig. 28a) flashing
press Select (Right) button until the correct Hour appears.
press Advance (Left) button 1 time to accept the setting displayed
the Minute setting (Fig. 28b) flashes
press Select (Right) button until the correct Minute appears.
press Advance (Left) button to accept the setting displayed, and either • revert to Surface Mode (if this setting was changed), or • advance to Set: Sampling Rate (Date/Time settings not changed)
SAMPLING RATE
Sampling Rate is the Time, or Depth, interval at which data samples will be
recorded during a dive for subsequent download to the Dive Downloader PC
software program. The set point has 'no effect' upon displayed data or data
stored in the unit's viewable Log.
M
Rates available are 2 FT (.5M), 5 FT (1.5 M), 10 FT (3 M), 2 SEC, 5 SEC, 10
SEC, 15 SEC, 20 SEC, 25 SEC, 30 SEC.
a
b
Fig. 28 - Set Time of Day
30
When lower rates (e.g., 2 FT, 2 SEC, etc.) are selected more samples are recorded per dive making the PC profile graphs smoother. However, since more
memory is used per dive, fewer dives can be stored for download. Also, lower
sampling rates require longer periods of time to download (up to 45 minutes).
500AI
TO SET: SAMPLING RATE
•
•
•
•
•
press BOTH buttons simultaneously, while in Surface Mode
press Advance (Left) button 13 times
the Rate setting appears flashing (Fig. 29)
press Select (Right) button until the desired Rate appears.
press Advance (Left) button to accept the setting displayed, and • revert to Surface Mode
Fig. 29 - Set Sampling Rate
31
SUMMARY OF SET MODES
(settings entered by the factory appear in italics)
To access a specific Set mode from the Surface Mode, press the button(s) as follows:
SET MODE
To access/set>
TO ACCESS
Both '1' time>
TO VIEW
TO SAVE
• FO2 Default (On)
• Audible Alarm (On)
• Depth Alarm (320 ft)
• Turn Pressure (3000 psi)
• End Pressure (1500 psi)
• Units (Imperial)
• EA (download)
• Year (1999)
• Month (1)
• Day (1)
• Hour Format (12)
• Hour (12)
• Minute (00)
• Sample Rate (10 FT)
Left '0' times>
Left '1' time>
Left '2' times>
Left '3' times>
Left '4' times>
Left '5' times>
Left '6' times>
Left '7' time>
Left '8' times>
Left '9' times>
Left '10' times>
Left '11' times>
Left '12' times>
Left '13' times>
Right - toggle (On/Off)>
Right - toggle (On/Off)>
Right - 10 ft (3 m)/sec>
Right - 250 psi (17 BAR)/sec>
Right - 100 psi (7 BAR)/sec>
Right - toggle>
>
>
>
Right - 1 year/sec>
Right - 1 month/sec>
Right - 1 day/sec>
Right - toggle 12/24>
Right - 1 hour/sec>
Right - 1 minute/sec>
Right - 1 rate/sec>
Left - to Surface* or Audible
Left - to Surface* or Depth Alarm
Left - to Surface* or Turn Pressure
Left - to Surface* or End Pressure
Left - to Surface* or Units
Left - to Surface* or EA
Left - to Surface* or Year
Left - to Month
Left - to Day
Left - to Hour Format
Left - to Hour
Left - to Minute
Left - to Surface* or Rate
Left - to Surface
* If the setting was altered
32
500AI
PRE DIVE
and
DIVE MODES
33
OPERATIONAL MODES
While on the surface, the Control Buttons enable you to access operational
modes and activate the backlight. During a dive, they enable you to view an
Alternate display of information and activate the backlight.
TEMPERATURE/TIME/DATE MODE
To view Ambient Temperature/Time/Date (Fig. 30) while in Surface Mode:
• Press the Advance (Left) button 1 time.
• The backlight will illuminate the display for 10 seconds.
• The unit reverts to Surface Mode after 10 seconds, unless the Advance
(Left) button is pressed to access FO2 Set Mode.
Set for Imperial units of measure, Month is on the left and Day on the right.
Set for Metric, Day is on the left and Month on the right. Year doesn't appear.
FO2 MODE
Fig. 30 - Temp/Time/Date
34
The 500AI can be used either as an Air computer or as a Nitrox computer. After activation, it will operate as an Air computer without displaying information associated with oxygen calculations, unless the percentage of oxygen
(FO2) is set for a value other than 'Air' (i.e., a numerical value of 21 to 50 %).
500AI
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. 31). The Maximum Depth that can be achieved with an oxygen partial
pressure (PO2) of 1.60 ATA will also be displayed.
• FO2 must therefore be reset for each repetitive nitrox dive, or the value
will automatically 'default' to 50 and the dives will be calculated based on
50% O2 for oxygen calculations and 21% O2 (79% nitrogen) for nitrogen
calculations.
WARNING: If you surface for greater than 10 minutes during a
dive, a subsequent descent will be considered a new dive and
the FO2 value must be reentered.
If the Default is set to 'Off', the FO2 value for repetitive dives remains the
same until the FO2 set point is manually changed.
WARNING: Even if the Default is set OFF, the FO2 setting
must be verified to match the percentage of oxygen (FO2) in
the nitrox mix being used 'before each nitrox dive'.
O2
FT
MAX
Fig. 31 - FO2 50% Default
35
FO2 Set for an Air Dive
2000
1000
140
70
0
0
When set with an FO2 value of 'Air', the 500AI will perform calculations 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 (Fig.
32), or subsequent dives, unless FO2 is set for a numerical value (21 to 50%).
3000
FT
4000
210
280
350
5000
FT
MAX
Setting FO2
Fig. 32 - Dive Mode
(FO2 Set for Air)
To access FO2 Set Mode while in the Surface Mode and set the unit for Air or
the percentage (%) of oxygen (FO2) in your nitrox mix:
a
O2
FT
MAX
b
Fig. 33 - Setting FO2
36
• press the Advance (Left) button 2 times
• press the Select (Right) button repeatedly, or press and hold it, until the
value of FO2 for the nitrox mix being used is displayed
• the FO2 value displayed (Fig. 33a) will advance from 21 to 50 (%) in increments of 1 (%), then display 'Air' again.
• the Maximum Depth that can be achieved with an oxygen partial pressure (PO2) of 1.60 ATA will be displayed (Fig. 33b) for each FO2 value.
No PO2 value will appear for Air.
The unit reverts to Surface Mode after 2 minutes, unless the Advance (Left)
button is pressed to access the Plan Mode.
500AI
FO2 Set for a Nitrox Dive
You can set the 500AI for nitrogen-oxygen (nitrox) mixtures of 21% to 50%
oxygen (O2). If FO2 is set at a value of 21% (Fig. 34), the unit will remain set
as a '21% nitrox computer' for subsequent nitrox dives until FO2 is set to a
higher value, or until it automatically turns off and is reactivated.
O2
FT
MAX
Once a dive is made with the Pro Plus set as a nitrox computer (FO2 set for a
numerical value), it cannot be set for 'Air' until 24 hours after the last nitrox
dive. However, you can set FO2 for 21% for use with Air.
Fig. 34 - FO2 Set at 21%
PLAN MODE
AERIS strongly recommends that you access the Plan Mode prior to
every dive to review the Planning Sequence (Fig. 35) that will help
you plan your dive as required to avoid exceeding no decompression,
or oxygen exposure, limits. This is especially important for repetitive
dives, when the Planning Sequence will indicate for you the 'adjusted' no decompression dive times that are available to you for your next dive, based on
any residual nitrogen or oxygen accumulation (whichever is in control) following your last dive and surface interval.
FT
Fig. 35 - Plan Mode
37
WARNING: The Planning Sequence predicts only no decompression 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.
Depth
feet (meters)
500AI NDLs
minutes
Eng (Metric)
30
40
50
60
70
80
90
100
110
120
130
140
150
160
260
137
80
57
40
30
24
19
16
13
10
9
8
7
(9)
(12)
(15)
(18)
(21)
(24)
(27)
(30)
(33)
(36)
(39)
(42)
(45)
(48)
(283)
(144)
(84)
(58)
(41)
(31)
(26)
(20)
(16)
(13)
(11)
(9)
(8)
(7)
Fig. 36 - No Decompression
Limits (NDLs)
38
To access the Planning Sequence while in the Surface Mode:
•
•
•
•
press the Advance (Left) button 3 times (prior to a day's first dive), or press the Advance (Left) button 4 times (if a dive has been made)
press repeatedly, or press and hold, the Select (Right) button
a sequence of depths from 30 to 160 feet (9 to 48 meters) in 10 foot (3
meter) increments will be displayed together with the 'predicted' no decompression limit for that depth (Fig. 36).
No decompression times are only displayed for depths where there is at least 3
minutes of dive time available at the depth, taking into account a descent rate
of 120 feet (36 meters) per minute. Depths greater than the maximum depth
that can be achieved with a partial pressure of oxygen (PO2) of 1.60 ATA will
not be displayed.
The unit reverts to Surface Mode 2 minutes after the Select (Right) button is
released, unless the Advance (Left) button is pressed to access the Log Mode.
500AI
Plan Mode Prior to a 'Repetitive Nitrox Dive'
FT
If the segments of the Nitrogen Bar Graph are displayed (Fig 37) during the
Planning Sequence, that next dive is calculated to be controlled by nitrogen
loading.
If the segments of the O2 bar graph are displayed (Fig. 38), that next dive is
calculated to be controlled by oxygen loading.
The 500AI will store oxygen accumulation for up to 10 dives conducted during
a 24 hour period. In the event that the maximum limit for oxygen loading has
been exceeded for that day, all of the segments of the O2 bar graph will be displayed (Fig. 39).
Depth and Time displays will not appear until the O2 bar graph recedes into
the green (normal) zone (e.g., your daily oxygen dosage decreases an amount
equivalent to the amount accumulated during the latest dive completed).
WARNING: The 500AI must be manually activated and be in an
operating mode prior to start of a dive. The unit will not activate automatically by immersion in water. Also, FO2 must be
verified or set prior to commencing each nitrox dive.
Fig. 37 - Nitrogen Controlled
FT
O2
Fig. 38 - Oxygen Controlled
O2
Fig. 39 - Max Daily O2
Limit Exceeded
39
NO DECOMPRESSION DIVE MODE
a
b
2000
3000
1000
140
FT
4000
210
280
70
0
0
350
As long as it is activated on the surface, the 500AI will enter the No Decompression Dive Mode when you descend deeper than 5 feet (1.5 meters), regardless of the operating mode it is in.
5000
FT
MAX
e
c
d
Fig. 40 - Dive Mode (Main)
To activate the backlight at any time* during a dive, press the Select (Right)
button. The display will be illuminated as long as the button is depressed plus
5 seconds after it is released.
*The backlight will not activate during a Low Battery condition.
No Decompression Dive Mode Main Display (Fig. 40)
2000
3000
1000
140
70
0
0
4000
210
280
350
5000
Information includes - Current Depth (a), the No Decompression Dive Mode
icon, Dive Time Remaining (b) and icon, Maximum Depth (c) and icon, Elapsed
Dive Time (d) and icon, Breathing Gas Time Remaining (e) and icon, and the
applicable bar graphs.
PSI
No Decompression Dive Mode Alternate Display (Fig. 41)
Fig. 41 - Alternate Display
40
To view an Alternate Display during a dive, press the Advance (Left) button.
Information includes - Temperature, Time of Day, current value of PO2 (if a
nitrox dive), Tank Pressure, and the applicable bar graphs.
500AI
Dive Mode Bar Graphs (Fig. 42)
As your depth and/or elapsed dive time increase, the Nitrogen Bar Graph will
fill with segments (green toward red) to represent the absorption of nitrogen;
and if FO2 was set for a value other than 'Air', the O2 Bar Graph will fill with
segments (green toward red) to represent oxygen accumulation for that dive,
or 24 hour period, whichever is greater.
The Tank Pressure Bar Graph will recede from green toward red as breathing
gas is consumed. Segments of the Ascent Rate Indicator will fill (and recede)
as your ascent rate increases (and decreases) throughout the dive.
2000
140
0
FT
4000
210
280
70
0
350
5000
FT
MAX
Fig. 42 - Bar Graphs
WARNING: Every effort should be made to keep all of the bar
graphs in the green throughout your dives to reduce your risk
of exposure to decompression sickness and oxygen toxicity.
a
2000
ENTERING DECOMPRESSION DIVE MODE
3000
1000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
The 500AI provides information that will help you avoid or, if necessary, manage emergency decompression.
The Decompression Dive Mode activates when the No Decompression Limits
are exceeded and the Nitrogen Bar Graph enters the red decompression zone
(Fig. 43a). Decompression Dive Mode is described on page 57.
Fig. 43 - Decompression
Dive Mode
41
VIOLATION AND GAUGE MODES
The 500AI enters Violation Modes when it is unable to predict an ascent procedure.
If the 500AI enters a Permanent Violation Mode, it will not display information relating to nitrogen or oxygen loading for the remainder of that dive or for
subsequent dives conducted during the 24 hour period after surfacing. It will
operate in a Gauge Mode displaying only Depth and Elapsed Time.
NOTE: Violation Modes and Gauge Mode are described on
pages 60 - 65.
ASCENDING TO THE SURFACE
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
While ascending to shallower depths, the segments that have filled up the Nitrogen Bar Graph will begin to recede (Fig. 45), offering a graphic representation of your multilevel diving capability.
A safety stop made between 15-20 feet (5-6.5 meters) is strongly recommended as a standard procedure before completing your ascent.
Fig. 45 - Nitrogen Bar Graph
(receding)
42
500AI
You should make every effort to complete all of your ascents with the
Nitrogen Bar Graph inside of the green zone.
If you inadvertently entered Decompression Mode, you must not complete your ascent until the Nitrogen Bar Graph is at least inside the
yellow Caution Zone.
While you cannot provide a guarantee against the occurrence of decompression sickness, you may choose your own personal zone of
caution based upon your individual age, physique, excessive weight,
training, experience, etc. to reduce the statistical risk. By 'backing
off' on the bar graph (maintaining fewer segments), you can establish
and adjust your personal level of conservatism and margin of safety.
a
ASCENDING TOO FAST
2000
The Ascent Rate Indicator shows how fast you are ascending. When you exceed the maximum recommended ascent rate of 60 feet (18 meters) per
minute, the bar graph will enter the red (Too Fast) zone (Fig. 46a), and you
will be alerted by the segments flashing. You will also be alerted by an Audible
Alarm (1 beep per second). The warnings will stop when your ascent rate is
slowed.
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
Fig. 46 - Ascent Too Fast
43
ALTITUDE DIVING
The mathematical model within the 500AI accounts for the reduced No Decompression dive time available at higher elevations based on NOAA (National
Oceanic and Atmospheric Administration) guidelines. When diving in high altitude lakes or rivers from 2,000 to 14,000 feet (610 to 4,268 meters), the
500AI will adjust automatically, providing corrected depth and reduced No Decompression and Oxygen Exposure times.
WARNING: If activated above 14,000 feet (4,268 meters), the
unit will perform a diagnostic check and immediately shut off.
DI
RESP
O
VER
When above 2,000 feet (610 meters), depth calibration is automatically
changed to read in 'feet of freshwater' rather than' feet of seawater'.
N SI LE
B
Be a RESPONSIBLE DIVER
at all times.
44
WARNING: Until it has shut itself off, you must not use the
500AI at a different altitude than the altitude where it was
originally activated. Doing so will result in an error equal to
the difference in barometric pressure, and possibly a false dive
mode with erroneous data.
More about Altitude Diving is presented on page 88.
500AI
POST
DIVE
MODES
45
POST DIVE SURFACE MODE
2000
3000
1000
140
70
0
0
4000
210
When you ascend to 3 feet (1 meter) or shallower, the 500AI will enter Surface
Mode and begin counting your surface interval.
280
350
5000
PSI
TRANSITION PERIOD
The first 10 minutes is, in affect, a Transition Period during which time the
following information is displayed (Fig. 47):
Fig. 47 - Transition Period
• 'Number' of that dive
• Surface Interval (colon flashing) and icon (flashing).
• Tank Pressure (digital display and Bar Graph)
• Nitrogen Bar Graph indicating current nitrogen loading.
• O2 Bar Graph indicating current oxygen loading (if a nitrox dive)
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.
Fig. 48 - Temp/Time/Date
46
To view the Temperature/Time/Date (Fig. 48):
• press the Advance (Left) button 1 time
• the unit will revert to Surface Mode after 10 seconds
500AI
To view that dive's Log (Fig. 49):
• press Advance (Left) button 2 times (while in Surface Mode), or • press Advance (Left) button 1 time (while viewing Temp/Time/Date)
• press Select (Right) button 1 time to view the Nitrogen data screen
• press Select (Right) button again to view the Oxygen data screen
• the unit will revert to Surface Mode after 2 minutes
Data will not be stored in the unit's memory until the 10 minute Transition
Period on the surface is completed. Also during the 10 minute Transition Period no other modes are accessible.
AFTER THE TRANSITION PERIOD (THE FIRST 2 HOURS)
Fig. 49 - Dive Log
(during Transition Period)
Once 10 minutes have elapsed, the Surface Mode icon and Surface Interval
time display colon will stop flashing indicating that the dive and transition period are completed, and a subsequent descent will be considered a new dive.
2000
3000
1000
140
70
For the remainder of the first 2 hours after surfacing, information will continue to be displayed as Surface Mode (Fig. 50) and you will have full access to
the other modes.
To view the Temperature/Time/Date:
• press the Advance (Left) button 1 time
• the unit will revert to Surface Mode after 10 seconds
0
0
4000
210
280
350
5000
PSI
Fig. 50 - Surface Mode
(first 2 hours)
47
O2
FT
MAX
Fig. 51 - FO2 (Default OFF)
O2
FT
MAX
Fig. 52 - FO2 (Default ON)
a
To access FO2 Mode:
• press the Advance (Left) button 2 times (while in Surface Mode)
• If the FO2 Default was set OFF, the FO2 setting displayed will be the
same value previously set (Fig. 51).
• If the FO2 Default was set ON, the FO2 value displayed (Fig. 52) will be
the 'default value' of 50 (%) and will have to be set for the breathing gas
used for the next dive.
• press the Select (Right) button to alter the setting, if required.
• the unit reverts to Surface Mode after 2 minutes, unless the Advance
(Left) button is pressed to access the Time to Fly and Desaturate.
To access Time to Fly and Desaturate Countdowns:
• press the Advance (Left) button 3 times (while in Surface Mode)
• The unit reverts to Surface Mode after 2 minutes, unless the Advance
(Left) button is pressed to access the Log Mode.
The Time To Fly counter (Fig. 53a) begins counting down 10 minutes after the
last dive (after the Transition Period) displaying the word 'FLY' with a countdown that starts at 23:50 (hr:min) and counts down to 0:00 (hr:min).
The Time to Desaturate counter (Fig. 53b), provides calculated time for tissue
b desaturation at sea level. The countdown starts at 9:59 (hours:minutes) maximum and counts down to 0:00.
Fig. 53 - Time to Fly and
Time to Desaturate
48
500AI
If the Time to Desaturate is calculated to be greater than 9:59, the display will
indicate 9:- - (Fig. 54) until it decreases to 9:59.
If a violation occurred during the dive, Time to Desaturate will not be displayed and a single dash ( - ) will appear instead of the letters FLY (Fig. 55a).
To access Plan Mode:
• press the Advance (Left) button 4 times (while in Surface Mode)
• press the Select (Right) button to scroll through the sequence
• The unit reverts to Surface Mode after 2 minutes, unless the Advance
(Left) button is pressed to access the Log Mode.
The Planning Sequence will now show 'adjusted' No Decompression Limits
(Fig. 56) based on residual nitrogen calculated to be remaining from the previous dives. Calculated dive times and the maximum allowed depth displayed
will increase as the real time surface interval increases after completion of a
dive.
Fig. 54 - Desaturate (>9:59)
a
Fig. 55 - After a Violation
FT
The Planning Sequence will only scroll to the maximum depth allowed by the
nitrogen or oxygen limit, whichever is in control. The respective bar graph
will be displayed to indicate which is in control.
Fig. 56 - Adjusted Limits
49
LOG MODE
Information from your 12 latest dives is stored in the Log for viewing. After
12 dives are accumulated, each subsequent dive will overwrite the oldest dive
in the log (i.e., the most recent dive deletes the oldest). Log information will
not be lost when the battery is removed, but factory service will delete data.
Dives are displayed in a reverse sequence that starts with the dive most recently recorded back to the oldest of the 12 dives stored. Thus, your most recent dive will always be the first shown in the sequence. Each dive has three
log screens - Date/Time started, Nitrogen data, and Oxygen data.
Dives are identified by the Date/Time and number. The first dive of a new day
(after midnight) will be #1.
The Advance (Left) button is used to access each dive's log.
The Select (Right) button is used to view second and third screens for that dive
(Nitrogen and Oxygen related data).
Fig. 57 - Log Mode
(first screen - Time/Date)
50
To access the Log Mode:
• press the Advance (Left) button 5 times (while in Surface Mode)
• the first screen (Fig. 57) of the most recent dive will appear displaying • Log Mode icon and Dive Number
• Time of Day and Date that the dive started (and icon)
500AI
To access a specific dive's log, press the Advance (Left) button repeatedly.
To view the second screen for that dive (Nitrogen Log- Fig. 58):
• press the Select (Right) button 1 time. Displayed will be • Log Mode icon
• Dive number
• Surface Interval prior to that dive (and icon)
• Maximum Depth reached for the dive (and icon)
• Elapsed Dive Time (and icon)
• Ascent Rate Indicator - showing the maximum ascent rate
maintained for 4 consecutive seconds during the dive
• Nitrogen Bar Graph - showing tissue nitrogen loading at the
end of the dive
To view the third screen for that dive (Oxygen Log - Fig. 59):
• press the Select (Right) button 1 time. Displayed will be • Log Mode icon
• FO2 value - set for that dive (and 'FO2' symbol)
• Maximum PO2 level - reached during that dive (and 'PO2' symbol)
• O2 bar graph - showing oxygen loading at the time you surfaced.
• If FO2 was set for 'Air' for that dive, the O2 screen will only display 'FO2'
and 'Air'.
• press the Advance (Left) button 1 time to view the first screen of the previous dive's log.
FT
MAX
Fig. 58 - Log Mode
(second screen - nitrogen)
O2
Fig. 59 - Log Mode
(third screen - oxygen)
51
To exit Log Mode and return to the Surface Mode:
• press the Advance (Left) button repeatedly to proceed through the remaining recorded dives.
• the unit will automatically revert to Surface Mode after 2 minutes, if no
button is pressed
AFTER THE FIRST 2 HOURS
Two hours after the last dive the Surface Mode will no longer be displayed.
The Time to Fly and Desaturate countdown timers will be displayed continuously, giving the final countdowns from 22:00 and 9:xx to 0:00 (Fig. 60).
To access other modes or enter settings:
• press the Select (Right) button to enter Surface Mode
• the unit will revert to Fly Mode after 2 hours, if no button is pressed
Fig. 60 - After 2 Hours
On the Surface
52
500AI
DOWNLOADING DATA TO PC
Using special linking hardware and a unique PC software program, data from
your dives can be downloaded (copied) from your 500AI into an IBM compatible PC program running on a Windows® 95 or 98 operating system. Instructions for performing the interface and download are provided with the Dive
Downloader for 500AI hardware and software package. The Dive Downloader
program provides profile data sampled throughout the dive.
To access the External Access (EA) Mode:
• press both buttons simultaneously while in Surface Mode
• press the Advance (Left) button 6 times
• the letters EA appear, flashing (Fig. 61)
• press the Advance (Left) button to revert to Surface Mode, or • press the Select (Right) button to initiate download
• the unit will automatically revert to Surface Mode after download is complete, or in 2 minutes if no button is pressed
• the backlight will not operate while in EA Mode
Fig. 61 - EA Mode
53
SUMMARY OF POST DIVE MODES
During the first 2 hours after a dive* (after the 10 minute Transition Period has ended):
MODES
TO ACCESS
TO VIEW
Backlight
press Right '1 time'
Temperature/Time/Date
press Left '1 time'
FO2 set
press Left '2 times'
Fly/Desaturate
press Left '3 times'
Plan Sequence
press Left '4 times'
> press Right (hold or repetitive)
Log Mode
press Left '5 times'
> press Right (hold or repetitive)
Set Mode
press Both '1 time'
> Refer to page 32 of this Guide
EA Mode
press Both '1 time'
> press Left '6 times' > Right '1 time'
> press Right (hold or repetitive)
*After the First 2 Hours, the unit will remain in Fly/Desaturate Mode. To access other Modes:
• press the Right button to return to the Surface Mode, then press the buttons as indicated above.
54
500AI
HANDLING
THE
EXTREMES
55
EMERGENCY DECOMPRESSION
The 500AI is a sophisticated instrument designed with capabilities that go beyond the range of recreational diving with compressed air. It will help you to
avoid and, if necessary, manage decompression.
NOTE: See pages 70 and 71 for additional safety information.
NITROGEN BAR GRAPH
The Nitrogen Bar Graph offers you a convenient way to consistently monitor
how close you are coming to the No Decompression Limit. As you use the
500AI and become familiar with the Nitrogen Bar Graph, you will notice that
it displays fewer segments for shorter dive times and shallower depths. Use
this feature to adjust conservatism to your diving needs.
a
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
Fig. 62 - Caution Zone
56
CAUTION: Use the yellow Caution Zone (Fig. 62a) as a visual
reference to place a wider margin of protection between you
and the No Decompression Limit.
AERIS suggests keeping the Nitrogen Bar Graph in the green No Decompression (NO DECO) zone during all of your dives, and that it always be in the 'green' when leaving the water.
500AI
DECOMPRESSION DIVE MODE
The 500AI is designed to help you by providing a complete representation of
how close you are to entering decompression. Decompression Dive Mode activates when theoretical no decompression time/depth limits are exceeded.
In the event that you enter Decompression Mode, as indicated by a double
beep and the large red segment of the Nitrogen Bar Graph and ceiling bar of
the Decompression Mode icon flashing, immediately begin a safe controlled ascent to a depth slightly deeper than, or equal to, the Required Ceiling Stop
Depth indicated (Fig. 63a) and decompress for the Stop Time indicated (Fig.
63b).
c
Other information appearing on the Main Display includes:
• current Depth (Fig. 63c)
• Total Ascent Time (Fig. 63d) - that includes stop times required at all
ceilings and vertical ascent time calculated at 60 ft (18 m) per minute.
• Breathing Gas Time Remaining and icon (Fig. 63e)
• O2 bar graph (if a nitrox dive), Ascent Rate Indicator, and Tank Pressure
bar graph
d
2000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
e
To activate he Backlight, press the Select (Right) button. The display will
remain illuminated for button depression time plus 3 seconds.
3000
a
b
Fig. 63 - Decompression
Mode (Main Display)
57
To view an Alternate Display of information (Fig. 64), press the Left (Advance) button. Information appearing includes 2000
3000
1000
140
0
4000
210
280
70
0
350
5000
PSI
FT
MAX
Fig. 64 - Alternate Display
•
•
•
•
•
•
•
water Temperature
Time of Day and icon
Elapsed Dive Time and icon
Maximum Depth and icon
Tank Pressure (digital display and Bar Graph)
The Bar Graphs will continue to be displayed as applicable.
The unit will revert to the Main Display after 10 seconds, or if the Advance (Left) button is pressed.
Breathing Gas Time Remaining During Decompression
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
Breathing Gas Time Remaining will fluctuate throughout your dive, decreasing as you dive deeper or breath heavier, and increasing as you ascend to shallower depths or relax your breathing efforts.
5000
FT
Fig. 65 - Gas Time Remaining (5 minutes)
58
When Breathing Gas Time Remaining decreases to 5 minutes, the Tank Pressure digital display will flash (Fig. 65) and a Double Beep will sound. This
means that only 5 minutes remain before your breathing gas supply will be reduced to the minimum level necessary to perform the required decompression
stops and still provide a Tank Pressure reserve upon surfacing.
500AI
When the Breathing Gas Time Remaining decreases to zero minutes, the Audible Alarm will continuously beep once per second* (Fig. 66), signaling the
need for an immediate safe ascent to your first decompression stop.
2000
*If the Audible Alarm feature was set to OFF prior to the dive, only a
double beep will be emitted to alert you.
There is no need to panic. The 500AI has allowed for (calculated) the breathing gas you will consume while making a safe controlled ascent, including that
required for decompression stops, and still provide the surfacing tank pressure
reserve you chose (set) as the End Pressure Alarm Set Point.
3000
1000
140
0
FT
4000
210
280
70
0
350
5000
FT
Fig. 66 - Gas Time Remaining (zero minutes)
MANAGING DECOMPRESSION STOPS
a
The amount of decompression credit time that you receive is dependent on
depth, with slightly less credit given the deeper you are.
2000
3000
1000
140
70
You should stay slightly deeper (Fig. 67a) than the Required Stop Depth indicated (Fig. 67b) until the next shallower Stop Depth appears. Then, you can
slowly ascend to, but not shallower than, that indicated ceiling Stop Depth.
Once all required decompression has been completed, the 500AI will revert to
the No Decompression Dive Mode. This is indicated by Total Ascent Time =
0:00, and the Nitrogen Bar Graph receding into the Caution Zone.
0
0
FT
4000
210
280
350
5000
FT
b
Fig. 67 - Managing a Stop
59
Dive Time Remaining now appears in place of Total Ascent Time (Fig. 68) displaying No Decompression Dive Time Remaining or Oxygen Accumulation
Time Remaining (whichever time is the least and in control).
WARNING: If you exceed certain limits, the 500AI will not be
able to tell you how to get safely back to the surface. These
situations exceed tested limits and can result in loss of some
500AI functions for 24 hours after the dive in which a Violation
occurred.
VIOLATION MODES
Violation Modes the 500AI can enter are termed Conditional, Delayed, and Immediate. Permanent Violation Mode and Gauge Mode are continuations of
these.
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
Fig. 68 - Reentry into No
Decompression Mode
60
WARNING: It is important to understand each different Violation Mode and how to carry out emergency procedures in the
event that you enter one.
While in Violation Modes, the Alternate Displays previously described can be
accessed using the Advance (Left) button, and the Backlight can be activated
using the Select (Right) button.
500AI
CONDITIONAL VIOLATION MODE
The 500AI will enter the Conditional Violation Mode if you ascend shallower (Fig. 69a) than the Required Decompression Ceiling Stop Depth
displayed (Fig. 69b).
The Audible Alarm will beep once per second* and the Total Ascent Time display (Fig. 69c) will flash until you descend below the Required Stop Depth.
*If the Audible Alarm feature was set to OFF prior to the dive, only a
double beep will be emitted to alert you.
If you descend below the required decompression ceiling before 5 minutes have
elapsed, the 500AI 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 is added to Required Stop Time.
2000
3000
1000
140
70
The added penalty decompression time will have to be 'worked off' first, before
obtaining off-gassing credit. Once the penalty time is worked-off, and off-gassing credit begins, required decompression Stop Depths and Time will decrease
toward zero, then the Nitrogen Bar Graph will recede into the yellow Caution
Zone and the 500AI will revert to the No Decompression Dive Mode.
a
c
0
0
FT
4000
210
280
350
5000
FT
b
Fig. 69 - Conditional Violation
61
DELAYED VIOLATION MODE
a
2000
1000
140
FT
4000
210
280
70
0
Three conditions cause the 500AI to enter the Delayed Violation Mode:
3000
0
350
5000
1. You remain above the Required Ceiling Stop Depth for 'more
than 5 minutes'.
FT
Fig. 70 - Delayed Violation
(above ceiling >5min)
The Audible Alarm will emit one long beep and the Total Ascent Time display will flash (Fig. 70a) until you descend below the Required Stop Depth.
You would then need to follow the Stop Depths and Times toward the surface
until the Nitrogen Bar Graph recedes into the yellow Caution Zone.
2. Your necessary Decompression requires a Ceiling Stop Depth 'between' 60 feet (18 meters) and 70 feet (21 meters).
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
Fig. 71 - Delayed Violation
(>60 FT ceiling required)
62
The Audible Alarm will emit one long beep and the Nitrogen Bar Graph will
flash. Total Ascent Time needed to get back to the surface will still be displayed (Fig. 71).
You must ascend to just deeper than 60 feet (18 meters), staying as close to
60 feet (18 meters) as possible without causing the Total Ascent Time display
to flash. When the Required Stop Depth indicates 50 FT/ 15 M, etc., you can
ascend to, but no shallower than those depths and continue decompressing.
500AI
The 500AI cannot accurately calculate decompression times for Stop Depths
much greater than 60FT (18M) and offers no indication of how much time
spent underwater would result in the need for a greater stop depth.
3. You exceed the maximum operating depth (330 feet/99.5 meters).
The Audible Alarm will beep once per second* when you descend deeper than
the Depth Alarm set point that you selected (set).
*If the Audible Alarm feature was set to OFF, only a double beep.
Upon descending deeper than 330 feet (99.5 meters), the Nitrogen Bar Graph
will flash and the Current Depth and Max Depth displays will only indicate
'oor' (Fig. 72) until ascent is made to a depth shallower than 330 feet (99.5
meters). Once you ascend above 330 feet (99.5 meters), the Current Depth display will be restored, however Max Depth will only display 'oor' for the remainder of that dive. The Log for that dive will also only indicate 'oor' as the Max
Depth achieved.
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
FT
MAX
WARNING: The expanded capabilities of the 500AI are provided as safety features to assist you with emergency situations.
Special training, equipment, and support are necessary for diving deeper than the maximum recommended sport diving depth
limit of 130 feet (39 meters).
Fig. 72 - Delayed Violation
(>330 ft / 99.5 m)
63
IMMEDIATE VIOLATION MODE AND GAUGE MODE
WARNING: The 500AI 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 500AI design, and a 500AI should not be used for the dives.
During the Dive
If a ceiling much greater than 60FT (18M) is required, an Immediate
Violation Mode will be entered (Fig. 73). This situation would be preceded
by entering Delayed Violation Mode, previously described on page 62. The
500AI would then operate with limited functions in Gauge Mode during the
remainder of that dive and for 24 hours after surfacing.
2000
3000
1000
140
70
0
0
FT
4000
210
280
350
5000
PSI
FT
MAX
Gauge Mode turns the 500AI into a digital instrument without any decompression or oxygen monitoring functions. Only Current Depth, Max Depth,
Elapsed Dive Time, Tank Pressure (digital and Bar Graph), and the Ascent
Rate Indicator will be displayed, and the Nitrogen Bar Graph and O2 Bar
Graph will flash as a warning of this condition (Fig. 73).
Fig. 73 - Immediate Violation
and Gauge Mode
To view Temperature and Time of Day, press the Advance (Left) button. To
(underwater)
activate the Backlight, press the Select (Right) button.
64
500AI
After the Dive
The 500AI will also enter an Immediate Violation Mode five minutes after
reaching the surface from a dive in which a Delayed Violation occurred.
On the surface, Gauge Mode displays the Dive Number, Surface Interval, and
Tank Pressure (digital and Bar Graph). It does not provide the FO2, Planning
Sequence, or Time to Fly and Desaturate features (Fig. 74).
The countdown timer that appears when you try to access Time to Fly does not
represent 'Time to Fly'. It is only provided to inform you of the time remaining
before normal 500AI operation can resume with full features and functions.
To view Temperature/Time/Date, press the Advance (Left) button. To activate
the Backlight, press the Select (Right) button.
2000
PERMANENT VIOLATION
140
70
0
Entering the Immediate Violation Mode, then Gauge Mode, will result in loss
of all 500AI decompression and oxygen monitoring functions for 24 hours after
that dive. This condition is considered a Permanent Violation, and in
the event that a dive is made during the 24 hour period, a full 24 hour
surface interval must then be served before all functions are restored.
3000
1000
0
4000
210
280
350
5000
PSI
Fig. 74 - Immediate Violation
and Gauge Mode
(on the surface)
65
OXYGEN EXPOSURE
The 500AI is a sophisticated instrument designed with capabilities that go beyond the range of recreational diving with compressed air. It will help you to
avoid and manage excessive oxygen exposure.
PARTIAL PRESSURE OF OXYGEN
As depth increases during the dive, the partial pressure of oxygen (PO2) increases. As you approach the maximum depth allowed for the FO2 value set
for the dive, the 500AI will alert you and display the PO2 value while you reduce your level of PO2 according to your specialized nitrox training.
High PO2 Dive Mode
2000
3000
1000
140
70
0
0
4000
210
FT
280
350
5000
O2
Fig. 75 - High PO2 Warning
66
The 500AI enters the High PO2 Dive Mode when the partial pressure of oxygen becomes equal to, or greater than, 1.40 ATA. A double beep is emitted
and the current PO2 value and symbol PO2 will appear and remain on display
until the level of PO2 decreases below a value of 1.40 ATA (Fig. 75).
If partial pressure of oxygen continues to increase, the value of PO2 displayed
will increase from 1.40 toward a maximum value of 5.00 ATA in increments of
'.01' ATA.
500AI
When PO2 reaches a value of 1.60 ATA, the Audible Alarm will emit a double
beep then one beep per second* as a warning until the level of PO2 decreases
below 1.60 ATA. Also, the large red segment of the O2 bar graph, the PO2
value, and PO2 symbol will flash continuously (Fig. 76).
*If the Audible Alarm feature was set to OFF, only a double beep.
WARNING: In the event that you enter High PO2 Dive Mode,
you must immediately focus on reducing the partial pressure of
oxygen by slowly ascending to a shallower depth at a safe rate
in accordance with your nitrox training. If you continue the
dive at your current depth, or descend deeper, your exposure to
CNS oxygen toxicity will increase.
HIGH OXYGEN ACCUMULATION
2000
It is important that you understand that conducting repetitive dives using enriched nitrogen-oxygen (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.
3000
1000
140
70
0
0
4000
210
FT
280
350
5000
O2
Fig. 76 - High PO2 Alarm
67
The O2 Bar Graph provides you with a convenient graphic representation of
your oxygen accumulation, displaying either oxygen accumulated during that
dive, or during the repetitive dives you conduct during that 24 hour period,
whichever of the two is greater at that time.
The yellow Caution Zone of the O2 Bar Graph offers you a convenient way to
consistently monitor how close you are coming to the limits of oxygen tolerance. Use it as a visual reference to place a wider margin of protection between you and the Limits.
2000
3000
1000
140
70
0
0
If the theoretical amount of oxygen accumulated equals, 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 red
danger zone (Fig. 77). The full O2 Bar Graph will flash and the Audible Alarm
will emit one beep per second* as a warning until the level of oxygen decreases
below the limit.
FT
4000
210
280
350
5000
O2
FT
MAX
Fig. 77 - High O2 Alarm
68
*If the Audible Alarm feature was set to OFF, only a double beep.
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.
500AI
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. If you exceed the maximum 24 hour period allowable oxygen exposure (dose), you must allow a surface interval
of at least 24 hours before reentering the water.
AERIS suggests always leaving the water with the O2 Bar Graph in
the green (normal) zone.
O
If you dive in situations where your trip would be ruined or your
safety would be jeopardized by losing the use of your 500AI, an analog or digital backup system or use of standard air (or nitrox) tables
is highly recommended.
DI
RESP
If your 500AI stops working for any reason, it is important that you have anticipated this possibility 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.
VER
UNEXPECTED LOSS OF DISPLAYED INFORMATION
N SI LE
B
Be a RESPONSIBLE DIVER
at all times.
69
ADDITIONAL 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.
• By entering decompression, you automatically impose a “ceiling” above you which you cannot immediately ascend beyond, denying you free access to the surface.
• Exiting the water with the Nitrogen Bar Graph in the red decompression zone greatly increases the risk of decompression sickness, and may result in injury or death.
• Existing data for making planned decompression dives is extremely limited, and virtually
nonexistent for repetitive decompression diving. Decompression diving greatly increases
your risk of decompression sickness.
• Decompression diving, or diving deeper than 130 feet (39 m), will greatly increase your risk
of decompression sickness.
• AERIS does not advocate diving to depths below 130 feet (39 meters), the basis for which is
purely theoretical.
70
500AI
ADDITIONAL WARNINGS and SAFETY RECOMMENDATIONS
• Maximum limits for exposure to oxygen should not be exceeded, and the consequences of
CNS (Central Nervous System) oxygen toxicity can be severe, resulting in Gran Mal convulsions and drowning.
• Conducting repetitive dives using enriched nitrogen-oxygen mixtures can lead to oxygen
buildup, reducing oxygen tolerance while increasing the risk of pulmonary oxygen toxicity.
• The oxygen features of the 500AI are intended for use only by recreational divers trained for
nitrox diving by an instructor certified by a recognized training agency to teach diving with
nitrox.
• Allowing the O2 Bar Graph to enter the red (Danger) zone greatly increases the risk of CNS
oxygen toxicity, and may result in serious injury or death.
• It should not be considered that the capabilities built into the 500AI provide any implied approval or consent from AERIS for individuals to exceed the defined limits of recreational dive
profiles, as agreed on by all internationally recognized training agencies.
• The 500AI is not intended for use by military or commercial divers.
71
SUMMARY OF EXTREME DIVE MODES
WARNING: Avoid the extremes and make all ascents safely and controlled.
Modes
REASON
ACTION
Decompression
NDL exceeded
Decompress at Stop Depth indicated until it changes
Conditional Violation
above ceiling
Descend below Stop Depth indicated and decompress
Delayed Violation
> 5 min above ceiling
Descend below Stop Depth indicated and decompress
60-70 FT (18-21 M) ceiling
Decompress at 60 FT (18 M) Stop Depth until it changes
> 330 ft (99.5 m) depth
Ascend to within recreational limits
much > 60 FT (18 M) ceiling
No prediction available, only depth and elapsed time
surfaced during delayed viola
No prediction available, only depth and elapsed time
High PO2
> 1.40 ATA PO2
Ascend to shallower depth, reduce PO2 level
High O2
> per dive O2 limit
Ascend to surface until O2BG in 'green'
> 24 hr O2 limit
Ascend to surface until O2BG in 'green'
Immediate Violation
and Gauge Mode
72
500AI
CARE
and
MAINTENANCE
73
CARE AND CLEANING
The 500AI is a sensitive electronic instrument. Although it has been designed
to withstand the rigors of diving, it still must be handled carefully to protect it
from shock, excessive heat, chemical attack, and tampering. Protect the lens
against scratches with a transparent Instrument Lens Protector. Small
scratches will naturally disappear underwater.
CAUTION: Never spray aerosols of any kind on, or near, the
500AI. The propellants may chemically attack the plastic.
AFTER THE DIVE
Prevent Scratches
with an AERIS
Lens Protector
Soak and rinse the 500AI in fresh water following each dive, and check the low
pressure sensor guard cap to ensure that it is free of any debris or obstructions. Use lukewarm water or a slightly acidic white vinegar/water bath to dissolve any salt crystals. After removal from the bath, place the 500AI under
gently running fresh water and towel dry before storing. Transport your
500AI cool, dry, and protected.
WARNING: Never poke any object through any slots or holes of
the 500AI. Doing so may damage the depth sensor, possibly resulting in erroneous depth and/or dive time remaining displays.
74
500AI
ANNUAL INSPECTIONS AND SERVICE
Your 500AI 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). AERIS recommends that you
continue to have this inspection performed every year to ensure your 500AI is
working properly. A convenient service record is provided in the rear of this
owner's guide which should be signed by the service technician after each annual inspection or factory service. The cost of annual inspections are not covered under the terms of the 2 year limited warranty.
WARNING: If you are in doubt about the accuracy of your
500AI's depth readings, DO NOT attempt to dive with it until it
has been inspected by AERIS Customer Service.
O
DI
RESP
WARNING: Never pressure test the 500AI in an air environment. Doing so may damage the depth sensor; possibly resulting in erroneous depth or time readings.
VER
It is possible to damage the 500AI depth sensor if it is not pressure tested
properly. Please take heed of the following warning:
N SI LE
B
75
HOW TO OBTAIN SERVICE
Take your 500AI to an Authorized AERIS Dealer or send it to the nearest
AERIS Regional Distributor Facility.
To return your 500AI 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.
• Remove the 500AI with the HP hose from the regulator.
• Send only the 500AI with hose (do no attempt to remove the hose).
• Package it using a protective cushioning material.
• Include a legible note stating the specific reason for return, your name,
address, daytime phone number, serial number, and a copy of your original sales receipt and Warranty.
• Send prepaid and insured to the nearest AERIS service facility.
• Non-warranty service must also be prepaid (call for an estimate).
• If you have any questions regarding 500AI service, call AERIS Customer
Service at (510) 346-0010, 8 to 5 PST, or E-MAIL: info@diveaeris.com.
Responsible
76
NOTE: Annual 'inspections' are performed only by Authorized
AERIS Dealers and are not performed by the factory.
500AI
BATTERY LIFE
Battery consumption rate varies throughout periods of operation, which begin
upon activation and continue for 24 hours after surfacing from a dive. The exact number of dives, or hours of operation, that you will obtain with a battery
is subject to variables such as the number of dives conducted during an operational period, temperature, and the frequency and duration of backlight use.
Tests and calculations indicate that a new Tadiran® 1/2AA model TL-2150,
.95Ahr, 1.0 ma, Lithium battery will maintain unit operation for approximately 300 dive hours (if 1 - 1 hour dive per dive day) to over 600 dive hours (if
2 or more 1 hour dives per dive day). Yearly replacement is recommended.
a
NOTE: The disposable battery supplied with the 500AI is not
covered by the limited 2 year warranty.
2000
3000
1000
140
LOW BATTERY CONDITION
70
0
0
4000
210
280
350
5000
PSI
During unit operation, voltage level is checked every 10 minutes. A Low Battery condition is indicated by the Battery icon appearing on the display (Fig.
78a). Upon decreasing to a voltage level that will not maintain proper unit operation, the icon will flash for 5 seconds followed by shutdown of the unit. The
Backlight will not operate during a Low Battery Condition.
Fig. 78 - Low Battery
77
If the unit did not display the Low Battery icon 'prior' to entering the Dive
Mode, and a low battery condition occurs during a dive, you will be alerted by
the Low Battery icon appearing on the display. There will be sufficient battery
power to maintain unit operation 'for the remainder of that dive'.
78
DI
RESP
O
VER
NOTE: The 500AI will continue to function on real time for a
period of 10 seconds after the battery is removed, maintaining
Nitrogen and Oxygen calculations for a repetitive dive. By having a new battery ready to insert prior to removing the battery
hatch and the battery that's in the unit, you can take advantage
of this enhanced feature.
N SI LE
B
CAUTION: If the new battery is not inserted within 10 seconds
after removal of the battery that's in the unit, you must wait for
a minimum of 2 minutes prior to inserting the new battery.
Otherwise, the unit may enter Dive Mode, perform a quick dive
while on the surface, log the dive, then resume normal operation. Also, Nitrogen and Oxygen calculations will be erased and
Date and Time will have to be reset.
Therefore, to retain calculated data for repetitive dives, the
battery must be replaced in less than 10 seconds!
500AI
BATTERY REPLACEMENT
NOTE: The following procedure must be closely adhered to.
Damage due to improper battery replacement is not covered by
the limited 2 year warranty.
PRELIMINARIES
• Purge the regulator system of all pressure.
• It is not necessary to remove the HP hose from the regulator or the 500AI
from the HP hose. However, if the 500AI is fitted with a Quick Disconnect, disconnect it to allow removal of the boot.
• Remove the two screws that secure the Logo Bar, or Compass Assembly,
to the top of the 500AI housing (Fig. 79a) by turning them counter clockwise with a 3/32" hex wrench, then lift the logo bar, or compass assembly,
up and off the top of the housing.
a
BOOT REMOVAL
• Grasp the 500AI with both hands, palms on front sides, fingers on the
rear of the console, and thumbs to the left and right of the top center.
• Carefully push the top of the boot over the tabs on top of the module
while pressing from behind with your fingers.
• Slide the boot down (but not off) the hose, or off the Quick Disconnect.
Fig. 79 - Logo Bar Removal
79
BATTERY REMOVAL
The battery compartment should only be opened in a dry and clean environment, with extreme care taken to prevent the entrance of moisture or dust.
+
+
+
a
Fig. 80 - Case Back
80
Examine the case back to find the Battery Hatch (Fig. 80a):
• Remove the three screws that secure the battery hatch to the housing by
turning them counter clockwise with a small Philips head screwdriver.
• Lift the hatch up and off of the housing.
• Lift the battery, positive (+) end first, out of the battery compartment.
• Remove the battery hatch o-ring and inspect it for any signs of deterioration or deformity. DO NOT use tools to remove the o-ring.
• O-ring replacement is highly recommended to ensure proper sealing.
• Closely check the battery hatch and the housing sealing surfaces for any
signs of damage that might impair proper sealing. If found, return your
500AI to your Authorized AERIS Dealer, and DO NOT attempt to use it
until it has received factory service.
• Closely examine the inside of the battery compartment for any signs of
corrosion indicating entrance of moisture into the unit. If found, return
your 500AI to an Authorized AERIS Dealer, and DO NOT use it until it
has received service.
500AI
If water or corrosion is found in the battery compartment, it is best to have
your unit inspected and cleaned by an Authorized AERIS Dealer Service Technician. If you are cleaning the unit • Inspect the lens and case to ensure they are not cracked or damaged.
• Discard the battery and DO NOT attempt to reuse it.
• Check the o-ring seating surfaces for damage (nicks, cuts, divots, etc.).
• Flush the battery hatch and compartment with a solution of 50% white
vinegar and 50% water. Rinse with fresh water, and allow to air dry overnight or blow dry with a hair dryer set at 'no heat'.
BATTERY INSTALLATION
o-ring
a
Fig. 81 - O-ring Installation
• To replace the battery hatch o-ring, lightly lubricate it with silicon grease
and place it in the groove of the battery hatch (Fig. 81a). Ensure that it
is evenly seated.
NOTE: This o-ring must be a genuine AERIS part that can be
purchased from your Authorized AERIS Dealer. Use of any
other o-ring will void the warranty.
• Place a new 3.6 volt TADIRAN®, model TL-2150, .95Ah, 1.0ma, Lithium
battery, negative end first, into the battery compartment, ensuring
proper orientation of the positive (+) and negative (-) ends (Fig. 82).
-
-
+
+
Fig. 82 - Battery
Orientation/Installation
81
• Carefully place the battery hatch with o-ring into position so that it seats
on top of the raised flange located around the opening of the battery compartment, and while holding it in place with your finger, secure it with
the three screws by turning them clockwise with a small Philips head
screwdriver. DO NOT attempt to use any other screws.
• Carefully tighten the screws until secure by alternately turning them
each one turn at a time. DO NOT overtighten.
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.
• If any portions of the display are missing or appear dim, or if a Low Battery condition is indicated, return the unit to your Authorized AERIS
Dealer for a complete evaluation before attempting to use it.
REASSEMBLY
• Reinsert the module into the rubber boot using care when pulling it over
the tabs on top of the housing.
• Secure the Logo Bar, or Compass Assembly with the two screws by turning them clockwise using a 3/32" hex wrench. DO NOT overtighten.
82
500AI
REFERENCE
83
DECOMPRESSION MODEL
The decompression model used by the 500AI 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 m) or decompression dives. Due to the present unavailability of statistical data, 500AI decompression predictions are based on U.S. Navy theory.
MULTIPLE TISSUE TRACKING
84
DI
RESP
O
VER
The 500AI tracks twelve tissue compartments with halftimes ranging from 5 to
480 minutes. The Nitrogen Bar Graph always displays the controlling compartment that is the only one important at that time. Think of the Nitrogen
Bar Graph as twelve separate transparent displays laid on top of one another
(Fig. 83). The tissue compartment that has filled up fastest is the only one the
viewer can see from the top.
N SI LE
B
At any particular point, one tissue compartment may be absorbing nitrogen,
while another that was previously higher may be off-gassing. Figure 84 illustrates the point at which one compartment “hands over” control to another
compartment at a different depth. This feature of the Decompression Model is
the basis of multilevel diving, one of the most important contributions the
500AI offers you.
500AI
Display Seen
by the Diver
Tissue Half-Times
etc.
etc.
160
3
120
4
80
5
40
6
20
7
8
No. of Segments
Fig. 83 - Tissue Compartment Control
Display Seen
by the Diver
Tissue Half-Times
40
20
8^
8v
8
No. of Segments
Fig. 84 - Tissue Compartment
Control Hand-Over
85
Depth
feet (meters)
500AI
NDL-mins.
Eng (Metric)
U.S.N.
NDL
mins.
30
35
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
260
--137
80
57
40
30
24
19
16
13
10
9
8
7
*
*
*
--310
200
100
60
50
40
30
25
20
15
10
10
5
5
5
5
5
(9)
(12)
(15)
(18)
(21)
(24)
(27)
(30)
(33)
(36)
(39)
(42)
(45)
(48)
(51)
(54)
(57)
(283)
--(144)
(84)
(58)
(41)
(31)
(26)
(20)
(16)
(13)
(11)
(9)
(8)
(7)
*
*
*
[* The 500AI will not scroll past 160
feet (48 meters), or when projected
bottom /descent time is less than one
minute.]
Fig. 85 - No Decompression
Limits
86
NO DECOMPRESSION LIMITS
Note how the No Decompression Limits for the 500AI are contrasted with the
U.S. Navy limits (Fig. 85). For most depths, the 500AI provides somewhat less
no decompression times than the U.S. Navy Tables. However, while the No
Decompression Limits may be less, you will receive greatly increased allowable
bottom times as you take advantage of the multilevel dive capabilities offered
by the 500AI. Notice also that the 500AI Planning Sequence does not scroll
past 160 feet (48 meters).
WARNING: Using the 500AI, just as using the U.S. Navy (or
other) No Decompression Tables, is no guarantee of avoiding
decompression sickness, i.e. “the bends.”
WARNING: AERIS advocates responsible diving practices and
does not recommend decompression diving, or diving below 130
feet (39 meters). The decompression capabilities of the 500AI
are intended strictly for emergency use. Decompression diving
is inherently hazardous and greatly increases your risk of decompression sickness - even when performed according to the
computer's calculations. In the event that you must make an
emergency decompression dive, you must not make another
dive for at least 24 hours.
500AI
OXYGEN EXPOSURE LIMITS
Predicted exposure limits and oxygen calculations of the 500AI are based on
maximum exposure durations published by the National Oceanic and Atmospheric Administration in the October 1991 NOAA Diving Manual (Fig. 86).
Maximum
Exposure Time
Both central nervous system (CNS) oxygen toxicity and pulmonary oxygen toxicity were taken into consideration when the limits were published by NOAA.
PO2 Per Dive Per 24hr
(Min)
(ATA) (Min)
Although CNS oxygen toxicity is considered the primary constraint for higher
levels of PO2, there are circumstances in which pulmonary oxygen toxicity can
limit exposures.
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
1.60
CNS oxygen toxicity is not considered likely at PO2 levels below 1.30 ATA. It
is however related to the diver's work level. Performing strenuous tasks could
cause the symptoms of oxygen poisoning to occur at PO2 levels lower than
they normally would appear during casual recreational diving.
The nitrox features of the 500AI are intended for use only by recreational divers trained for nitrox diving by an instructor certified by a
recognized training agency to teach diving with nitrox.
720
570
450
360
300
240
210
180
150
120
45
720
570
450
360
300
270
240
210
180
180
150
Fig. 86 - Oxygen
Exposure Limits
87
WARNING: 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.
WARNING: In the event that you exceed the maximum limit of
per dive allowable oxygen exposure, it is recommended that
you allow a surface interval of at least 2 hours before reentering the water. If you exceed the maximum limit of 24 hour period allowable oxygen exposure, you should allow a surface interval of at least 24 hours before reentering the water.
ALTITUDE DIVING
Responsible
88
Diving at high altitude requires special knowledge of the variations imposed
upon divers, their activities, and their equipment by the decrease in atmospheric pressures. AERIS recommends completion of a specialized Altitude
training course by a recognized training agency prior to diving in high altitude
lakes or rivers.
500AI
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
pressure indicate depth readings shallower than the depth they are actually at.
The 500AI automatically compensates for decreased ambient pressure when
activated at high altitudes up to 14,000 feet (4,267 meters). Its program contains a high altitude algorithm that reduces no decompression and oxygen exposure limits to add a larger zone of caution.
O
DI
RESP
WARNING: Altitude compensation provided by the 500AI takes
place when the unit is activated. DO NOT dive at any different
altitude until the 500AI shuts off. It will automatically
recalibrate when reactivated at the new altitude.
VER
Whenever the 500AI is manually activated at altitudes higher than 2,000 feet
(610 meters), it will automatically recalibrate itself to measure depth in feet of
fresh water rather than feet of sea water. Therefore, when returning to lower
altitudes, diving should not be conducted until the 500AI automatically clears
of any residual nitrogen and oxygen loading and resets to operate at the new
altitude.
N SI LE
B
89
FLYING AFTER DIVING
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* 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).
* excerpted from “The UHMS Flying After Diving Workshop”
The two exceptions to this recommendation 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.
Responsible
90
Since the 1990 UHMS guidelines were introduced, data from the 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 altitude
in a commercial jet airliner (altitude up to 8,000 feet/2,440 meters). 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”.
** excerpted from “DAN’s Current Position on Recreational Flying After Diving”
500AI
Both the UHMS and DAN agree that “There can never be a flying after diving
rule that 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”.
DI
RESP
O
VER
To reduce the risk of developing decompression sickness after a single no decompression dive, current guidelines suggest waiting 12 hours prior to exposure to atmospheric pressures equivalent to 1,000 feet (330 meters) above sea
level, or greater. When repetitive dives are conducted during the same day, or
period of days, it is suggested that the interval be increased to a minimum of
24 hours. Note that land travel to higher elevations after diving must also be
considered as an exposure to altitude.
N SI LE
B
Be a RESPONSIBLE DIVER
at all times.
91
SPECIFICATIONS
NO DECOMPRESSION MODEL
OPERATIONAL MODES
Basis:
• Modified Haldanean Algorithm
• 12 tissue compartments
Modes:
• Activation/Diagnostic
• Surface
• Temperature/Time/Date
• FO2 Set
• Time to Fly & Desaturate
• Plan
• Log
• Backlight
• Set • FO2 50% Default (on/off)
• Audible Alarm (on/off)
• Depth Alarm
• Turn Pressure Alarm
• End Pressure Alarm
• Unit of Measure (imperial / metric)
• Date (month, day, year)
• Time (hour format, hour, minute)
• Sampling Rate
• EA (External Access)
• No Decompression Dive
• Alternate No Decompression Dive
• Decompression Dive
• Alternate Decompression Dive
• Violation (conditional, delayed, & immediate/gauge)
• High PO2 Level
• High Oxygen Accumulation
Data Base:
• Diving Science and Technology (DSAT) - Rogers/Powell
Performance:
• Tissue compartment halftimes (in mins.) Spencer’s “M” values
5, 10, 20, 40, 80, 120, 160, 200, 240, 320, 400, 480
• Reciprocal subsurface elimination
• 60 minute surface credit control for compartments faster than 60 minutes
• Tissue compartments tracked up to 24 hours after last dive
Decompression Capabilities:
• Decompression ceilings at 10, 20, 30, 40, 50, & 60 feet
(3, 6, 9, 12, 15, & 18 meters)
Altitude Algorithm:
• Based on NOAA tables
Oxygen Tolerance Limits:
• Based on NOAA tables
92
500AI
SPECIFICATIONS (continued)
DISPLAY RANGE/RESOLUTION
BAR GRAPHS
Numeric Displays:
Nitrogen Bar Graph
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Dive Number
Depth
Maximum Depth
FO2 Set Point
PO2 Value
Dive Time Remaining
Gas Time Remaining
No Decompression Time
Decompression Stop Time
Total Ascent Time
Elapsed Dive Time
Surface Time
Dive Log Surface Interval
Time to Fly
• Time to Desaturate
• Cylinder Pressure
• Temperature
Range:
Resolution:
0-9
1
0 - 330 ft (0 - 99.5 m)
1 ft (.5 m)
330 ft (99.5 m)
1 ft (.5 m)
21 - 50 %
1%
.01 - 5.00 ATA
.01 ATA
0 - 9 hr. 59 min.
1 minute
0 - 9 hr. 59 min.
1 minute
0 - 9 hr. 59 min.
1 minute
0 - 99 min.
1 minute
0 - 9 hr. 59 min.
1 minute
0 - 1 hr. 59 min.
1 minute
0 - 23 hr. 59 min.
1 minute
0 - 23 hr. 59 min.
1 minute
23 hr. 50 min. - 0*
1 minute
(* starting 10 min. after the dive)
9 hr. 59 min. - 0*
1 minute
(* starting 10 min. after the dive)
0 - 5000 psi (0 - 352 BAR) 10 psi (.5 BAR)
0 to 99°F (-9 to 60°C)
1°
Special Displays
• Out of Range
• Gauge Mode Countdown Timer
Occurrence
>330 feet (>99.5 meters)
12 - 24 hours (after violation)
No Decompression zone (green)
No Deco Caution zone (yellow)
Decompression Warning zone (red)
segments
9
2
1
Oxygen Accumulation (O2) Bar Graph
segments
Normal zone (green)
9
Caution zone (yellow)
2
Danger zone (red)
1
Ascent Rate Indicator
Normal zone (green)
Caution zone (yellow)
Too Fast zone (red flashing)
segments
0
1
2
3
4
5
Tank Pressure Bar Graph
Range
segments
0 - 1000 PSI (0 - 70 BAR)
4
1000 - 5000 PSI (70 - 350 BAR)
8
feet/min.
0 - 20
21 - 30
31 - 40
41 - 50
51 - 60
61 +
meters/min.
0-6
6.5 - 9
9.5 - 12
12.5 - 15
15.5 - 18
18.5 +
pressure/segment
250 PSI (17.5 BAR)
500 PSI (35 BAR)
93
SPECIFICATIONS (continued)
OPERATIONAL PERFORMANCE
Function
• Depth
• Cylinder Pressure
• Timers
Accuracy
± 1% of full scale
± 1% of full scale
1 second per day
Dive Counter
• Displays Dives #0, 1, 2, 3, 4, 5, 6, 7, 8, 9 (continues to #0 to #9)
• Displays #0 for dives #10, 20, etc.
• Resets to Dive #1 upon diving after midnight (new date)
Dive Log Mode
• Stores 12 most recent dives in memory for viewing
• After 12 dives, adds 13th dive in memory and deletes the first dive
Altitude
• Operational from sea level to 14,000 feet (4,267 meters) elevation
• Recalibration of depth readings from 'feet of sea water' to 'feet of fresh water'
when higher than 2,000 feet (610 meters) elevation
Activation:
• Manual (push button) - cannot be activated by water immersion.
• Cannot be activated deeper than 4 feet (1.5 m).
• Cannot be activated at elevations higher than 14,000 feet (4,267 m).
• Needed before first dive of an activation period.
• Automatically shuts unit off if dive is made within 120 minutes after
initial activation. Reactivation required.
• Cannot be shut off manually.
Setting FO2:
• Automatically set for 'Air' upon activation.
• Remains set for Air unless set for a numerical value.
• Set point numerical values of 21 to 50%.
• If set at 21%, it remains set at 21% until changed.
• If set at 22 to 50%, the setting reverts to 50% after a dive if the FO2
Default is On. If the FO2 Default is Off, the value will remain at the
value set.
ACCESSORIES
Power
• Battery
• Shelf life
• Replacement
• Life expectancy
94
1 - 1/2AA, TADIRAN® model TL-2150 Lithium
(must be rated 3.6 volt, .95Ah, 1.0 ma)
Up to 10 years
User replaceable (annual recommended)
300 dive hours (if 1 - 1 hour dive per dive day) to over
600 dive hours (if 2 or more 1 hour dives per dive day)
Optional items available from your Authorized AERIS Dealer:
• Quick Disconnect - for removal of the console from HP hose
• Compass - attaches to top of console
• Transit Clip - retractor for attachment to BC d-ring
• Battery Kit - includes 1 battery, 1 o-ring, lubricant
• Lens Protector - adheres to lens, prevents scratches
• Dive Downloader - hardware and software package to download data
from memory to a PC data/profile program
500AI
GLOSSARY
The following are diving terms to become familiar with. Some apply specifically to the 500AI.
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
500AI).
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 .
Ascent Rate - The speed that a diver ascends toward the surface.
Ascent Rate Indicator - A display that shows ascent rate as a bar graph alongside a color–coded indicator.
Audible Alarm - A computer emitted tone that alerts the diver to potential danger.
Breathing Gas Time Remaining - A display of that shows the amount of time remaining based on a calculation of cylinder
pressure, and the diver’s breathing rate and depth.
Caution Zone - The yellow sections of the Bar Graphs that give a visual warning of a diver’s proximity to limits.
Ceiling - See decompression ceiling.
Clean Dive - A dive preceded by 24 hours of no diving activity.
CNS - 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 dive computer models have no direct relation to human tissues).
CZ - Abbreviation for Caution Zone.
DCS - Abbreviation for decompression sickness, i.e., “the bends”.
DECO - Abbreviation for Decompression.
Decompression Ceiling - The shallowest depth a diver may reach upon ascent without risking decompression sickness.
95
GLOSSARY (continued)
Decompression Stop - The depth(s) at which a diver must pause during ascent to allow absorbed nitrogen to escape naturally
from the tissues.
Depth Sensor - an electro-mechanical device that converts water pressure into an electrical signal, that is converted to a visual
depth display.
Diagnostic Mode - The first display seen on dive computers after initial activation during which time a self–check for internal
faults is performed.
Display - A visual readout of information.
Dive Log Mode - A computer display of previous dive information.
Dive Time Remaining - A display of the time before a diver must surface based on no-decompression and oxygen accumulation
status.
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
Integrated Dive Computer - A dive computer that monitors and displays cylinder pressure in addition to no decompression
information.
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.
Mode - A specific set of functions in a dive computer.
Multi-level Dive - A type of dive profile where the diver spends various times at different depths (opposite of a “Square Wave”
dive profile).
Nitrogen Bar Graph - A graphic display of simulated nitrogen absorption on AERIS dive computers.
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 50 % O2) as the breathing gas.
96
500AI
GLOSSARY (continued)
No Deco - Abbreviation for No Decompression.
No Deco Time Remaining - The amount of dive time remaining based on no-decompression status.
No Decompression - Any part of a dive where the diver can surface without requiring a decompression stop.
O2 Bar Graph - A visual representation of oxygen accumulation on a dive computer display.
OTU - Abbreviation for oxygen tolerance unit. A Hamilton's Repex method term for oxygen dose.
Out of Range - The point at which a dive computer can no longer supply correct dive information.
Oxygen Tolerance - Dose or exposure to the physiological affects of elevated levels of oxygen.
Oxygen Toxicity - The adverse physiological affects of exposure to elevated levels of oxygen.
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.
Plan Sequence - A display of available dive times at 10 foot (3 meter) intervals from 30 to 160 feet (9 to 48 meters) used when
dive planning.
Pressure Sensor - an electro-mechanical device that converts cylinder pressure into an electrical signal that the 500AI
converts into cylinder pressure and breathing gas time remaining displays.
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 nitrogen to
escape naturally from the tissues.
Square Wave Dive - A type of dive profile where the entire dive is spent at one depth between descent and ascent.
Tissue - See Compartment.
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 above 3 feet (1 meter) from a dive.
97
500AI SERVICE RECORD
Serial Number
_______________________________
Date of purchase _______________
Purchased from _______________________________
Below to be filled in by an Authorized AERIS Dealer:
Date
98
Service Performed
Dealer / Technician
500AI
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
• KNOWING MY BUDDY'S ABILITY
LEVEL AS WELL AS MY OWN
• ACCEPTING THE RESPONSIBILITY
FOR MY OWN SAFETY ON EVERY
DIVE
O
DI
RESP
• BEING FAMILIAR WITH AND
CHECKING MY EQUIPMENT BEFORE AND DURING EVERY DIVE
VER
• EVALUATING THE CONDITIONS
BEFORE EVERY DIVE AND MAKING
SURE THEY FIT MY PERSONAL
CAPABILITIES
N SI LE
B
Be a RESPONSIBLE DIVER
at all times.
99
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 1999
Doc. No. 12-7112 (12/22/99)
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