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owner's guide
SAVANT
ii
Responsible
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 SAVANT.
iii
SAVANT
WARNINGS:
• The SAVANT 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 certfication in diving with enriched nitrogen-oxygen (nitrox)
mixtures before using the SAVANT 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 SAVANT.
• 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.
Pay special attention to items marked with this Warning symbol.
iv
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.
SAVANT Owner's Guide, Doc. No. 12-7020
© 2002 Design 1998
2002 Davis Street
San Leandro, Ca. USA 94577
510/569-3100
TRADEMARK NOTICE
AERIS, the AERIS logo, SAVANT, and the SAVANT 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), Nitrogen Bar Graph
(U.S. Patent no. 4,882,687), and Ascent Rate Indicator (U.S. Patent no. 5,156,055).
DECOMPRESSION MODEL
The programs within the SAVANT 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 SAVANT dive computer model is based upon the latest research and
experiments in decompression theory. Still, using the SAVANT, 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.
v
SAVANT
CONTENTS
FEATURES AND DISPLAYS................................................................1
Introduction ................................................................................................................. 2
Control Buttons ........................................................................................................... 3
Nitrogen Bar Graph ..................................................................................................... 3
Oxygen (O2) Bar Graph .............................................................................................. 4
Ascent Rate Indicator .................................................................................................. 4
Depth Displays ............................................................................................................ 5
Time Displays.............................................................................................................. 5
Temperature Display ................................................................................................... 6
Date and Time of Day Display..................................................................................... 6
Audible Alarm .............................................................................................................. 6
Backlight Feature ........................................................................................................ 7
Operating Temperature ............................................................................................... 8
Sharing the SAVANT ............................................................................................................... 8
ACTIVATION AND SETUP ...................................................................9
Activating the Display ................................................................................................ 10
Surface Mode ............................................................................................................ 11
vi
CONTENTS (continued)
Entering Settings ....................................................................................................... 11
Set FO2 Default .................................................................................................... 12
Set Audible Alarm.................................................................................................. 12
Set Units of Measure............................................................................................. 12
Set Date/Time ....................................................................................................... 13
Set Dive Profile Sampling ..................................................................................... 14
PREDIVE AND DIVE MODES ............................................................15
FO2 Set for Air .......................................................................................................... 16
Setting FO2 for a Nitrox Dive .................................................................................... 17
Dive Planner.............................................................................................................. 18
No Decompression Dive Mode ................................................................................. 20
Ascending to the Surface .......................................................................................... 20
Summary of Access to Pre Dive and Dive Modes..................................................... 22
POST DIVE MODES...........................................................................23
Post Dive Surface Mode ........................................................................................... 24
Transition Period ....................................................................................................... 24
FO2 Mode ................................................................................................................. 25
vii
SAVANT
CONTENTS (continued)
Time to Fly and Desaturate ....................................................................................... 25
Dive Planner.............................................................................................................. 26
Dive Log Mode .......................................................................................................... 27
External Access Mode............................................................................................... 29
Summary of Access to Post Dive Modes .................................................................. 30
HANDLING THE EXTREMES ............................................................31
Emergency Decompression ...................................................................................... 32
Nitrogen Bar Graph Caution Zone ............................................................................ 34
Decompression Dive Mode ....................................................................................... 34
Conditional Violation Mode ....................................................................................... 36
Delayed Violation Mode ............................................................................................ 36
Immediate Violation Mode......................................................................................... 38
Gauge Mode ............................................................................................................. 38
Permanent Violation.................................................................................................. 39
Exceeding Maximum Operating Depth ..................................................................... 39
High PO2 Dive Mode ................................................................................................ 40
High Oxygen Accumulation ....................................................................................... 41
viii
CONTENTS (continued)
CARE AND MAINTENANCE..............................................................43
Care and Cleaning .................................................................................................... 44
Annual Inspections and Service................................................................................ 45
Battery Life ................................................................................................................ 46
Low Battery Condition ............................................................................................... 46
Battery Replacement................................................................................................. 47
Flooded Battery Compartment .................................................................................. 49
REFERENCE ......................................................................................51
Flying After Diving ..................................................................................................... 52
Altitude Diving ........................................................................................................... 53
Oxygen Limits ........................................................................................................... 54
Tissue Compartment Control .................................................................................... 54
No Decompression Limits ......................................................................................... 56
Specifications ............................................................................................................ 58
Glossary .................................................................................................................... 61
Service Record.......................................................................................................... 66
1
SAVANT
FEATURES
and
DISPLAYS
2
Welcome to AERIS and thank you for choosing the SAVANT!
Your SAVANT presents the information that you need before, during, and after
your air (or nitrox) dives using an intuitive combination of easy to read dis-
plays and identification icons. This instructional guide is intended to help you
become familiar with the functions and features available and show you ex-
amples of displays that you could expect to see in the various operational
modes. Relax and read through the complete owner's guide.
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 be-
come 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.
Throughout this owner's guide reference is made to the term
''breathing gas'. The rational being that the SAVANT can be
used for 'air' dives or 'nitrox' dives. 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.
FT
M
M
FT
MAX
NITROGEN
OXYGEN
S
A
V
A
N
T
TM
TM
3
SAVANT
NITROGEN
OXYGEN
S
A
V
A
N
T
TM
TM
The control buttons allow you to select display options and access specific
information. The Upper is named Advance (1a) and the Lower Select (1b).
They can be pressed repeatedly, or held in to scroll and continue as you set or
access different display modes.
Each numeric and graphic display represents a unique piece of infor-
mation. It is imperative that you understand the formats, ranges,
and values of the information represented to avoid any possible mis-
understanding that could result in error.
The Nitrogen Bar Graph (1c) represents tissue loading of nitrogen, showing
your relative no decompression or decompression status. As your depth and
elapsed dive time increase, segments will add to the graph, and as you ascend
to shallower depths, the bar graph will begin to recede, indicating that addi-
tional no decompression time is allowed for multilevel diving.
The Nitrogen Bar Graph monitors 12 different nitrogen compartments simul-
taneously and displays the one that is in control of your dive. It is divided into
a green No Decompression (normal) zone, a yellow Caution zone, and a red De-
compression (danger) zone.
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
Fig. 1
b
a
c
4
NITROGEN
OXYGEN
The Oxygen (O2) Bar Graph (2a) represents oxygen loading, your relative
oxygen tolerance dosage (OTU), showing the maximum of either per dive accu-
mulated oxygen, or 24 hour period accumulated oxygen. As your accumulation
increases during the dive, segments will add to the bar graph, and as loading
decreases, it will begin to recede, indicating that additional exposure is al-
lowed.
It also assists you with managing high partial pressure of oxygen (PO2) by
flashing the large red segment as a warning when PO2 exceeds the maximum
allowed limit of 1.60 ATA.
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 Ascent Rate Indicator (2b) is provided to help you avoid excessive as-
cent rates by providing a visual representation of ascent speed (i.e., an ascent
speedometer). It has been granted U.S. Patent no. 5,156,055. Green is a 'nor-
mal' rate, yellow a 'caution' rate, and red is 'Too Fast'.
When your ascent rate exceeds the maximum recommended rate of 60 feet (18
meters) per minute, the bar graph segments will enter the red 'Too Fast' zone
and flash once per second until your ascent speed is slowed. When this occurs,
you should immediately slow your ascent.
Fig. 2
Segments = Speed (rate)
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 will flash)
b
a
5
SAVANT
During a dive, the Current Depth display (3a), indicates depths from 0 to 330
feet (99.5 meters) in 1 foot (.5 meter) increments. A second depth display (Fig.
7b) indicates the Maximum Depth reached during that dive.
If you descend deeper than 330 feet (99.5 meters), the displays will show the
letters (oor) to indicate that you have gone 'out of range'.
During a Decompression Dive, the required Ceiling Stop Depth replaces
Maximum Depth (3b). Maximum Depth can then be viewed by depressing the
Advance (Upper) control button.
The Main Time display (3c) indicates elapsed Surface Time, theoretical Dive
Time Available, Dive Time Remaining, Total Ascent Time required, Time to
Fly, or Time of Day, depending on the operating mode that the unit is in.
A second time display (3d) indicates Elapsed Dive Time, Decompression
Stop Time required at a specific stop depth, or Time to Desaturate, depending
on the operating mode that the unit is in.
Time displays are shown in hour:minute format (i.e., 1:02 represents one hour
and two minutes, not 102 minutes!). The colon that separates hours and min-
utes blinks once per second when the display is indicating real time such as
elapsed Surface Time, Elapsed Dive Time, and Time of Day.
Fig. 3
FT
FT
MAX
NITROGEN
OXYGEN
a
b
d
c
6
NITROGEN
OXYGEN
Dive Time Available, Dive Time Remaining, Decompression Stop Time, Total
Ascent Time required, Time to Fly, and Time to Desaturate, are calculated
projections of time and use a solid (non-blinking) colon to indicate that they
are counting down, rather than up.
In the Surface mode, Temperature appears continuously (4a). During a dive,
Temperature is displayed in place of Maximum Depth and Elapsed Dive Time
when the Advance (Upper) control button is depressed, and for 3 seconds after
it is released. Temperature is not displayed during the Decompression mode.
If the Temperature exceeds a value of '99', two dashes ( - - ) will be displayed
on the screen until the unit's temperature decreases to '99'.
In the Surface mode, Time of Day appears for 5 seconds (5a) together with
the current Date (5b) when the Advance (Upper) button is depressed once.
When Units of Measure are set for 'Imperial', the Month appears to the left of
Day; and when set for Metric, the Month appears to the right of Day. Date
and Time are not displayed when the unit is in a dive mode.
If the Audible Alarm is turned 'on' (a user setting), it will emit -
One Double Beep (Potential Danger)
• Enter Decompression Mode
• Partial pressure of oxygen equal to or greater than 1.40 ATA.
Fig. 5
Fig. 4
b
a
NITROGEN
OXYGEN
a
7
SAVANT
One Beep per Second (Immediate Danger)
• Ascent to a depth shallower than a required stop depth.
• Ascent rate that exceeds 60 ft/min (18 m/min).
• Partial pressure of oxygen equal to or greater than 1.60 ATA.
• Oxygen accumulation greater than the allowed per dive or 24 hour limit.
Single Long Beep (Permanent Violation)
• Depth was shallower than a required stop depth for more than 5 minutes.
• Required Decompression exceeds a 60 FT/ 18 M ceiling.
• Five minutes after a conditional violation on the surface.
Short Beep (To indicate that the unit is operating correctly.)
• Immediately following activation and the Diagnostic Mode.
The backlight illuminates the upper and lower screens.
To activate in the Surface mode or Time/Date mode, or while in a dive
mode, press the Select (Lower) button. The screens will be illuminated
for 5 seconds. Release and press again to activate as desired.
Aeris recommends that you always carry primary and backup
dive lights when conducting dives that could include low light
situations.
Be a -
RESPONSIBLE DIVER
at all times.
R
E
S
P
O
N
S
I
B
L
E
D
I
V
E
R
8
The SAVANT will operate in almost any temperature diving environment in
the world between - 40 °F and 140 °F (- 10 and 60 °C). At extremely low tem-
peratures, 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 batteries with body heat before diving.
WARNING: Never participate in sharing or swapping of a dive
computer. Doing so may result in injury or death.
The SAVANT provides information based upon a diver’s personal dive profile,
and therefore must not be “shared” between divers. 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.
This rule is especially important when using the SAVANT, due to the personal
information it provides.
Responsible
9
SAVANT
ACTIVATION
and
SETUP
10
WARNING: Never attempt to activate the SAVANT underwater.
This may result in inaccurate depth and no-decompression time
displays. If the unit is activated when deeper than 4 feet (1
meter) underwater, or at elevations higher than 14,000 feet
(4,267 meters), it will perform a diagnostic check followed by
immediate shutdown. Always check the display before entering
the water to ensure that it is activated!!
To activate the unit, press the Select (Lower) button once and release. It
will enter Diagnostic Mode (6), displaying all “8’s”, followed by “dashes”, and a
countdown from 9 to 0. The backlight will be on as it checks its display func-
tions and battery voltage to ensure that everything is working correctly.
It will also check the ambient barometric pressure, and calibrate its present
depth as zero. At elevations of 2,000 feet (610 m) or higher, it will recalibrate
itself to measure depth in feet of fresh water instead of feet of sea water.
If no dive is made within 2 hours after initial activation, the unit will auto-
matically deactivate to conserve its battery power.
WARNING: During activation and diagnostics, if any display or
function varies from the information presented here, return
the SAVANT to your AERIS Dealer for inspection.
Fig. 6
FT
M
M
FT
MAX
NITROGEN
OXYGEN
11
SAVANT
Surface Mode, identified by the Surface Time icon (7a), follows Diagnostic
Mode after activation. Information includes Dive Number '0' (no dive made
yet), Surface Time with flashing colon, and Temperature..
If battery voltage is low, the Battery icon will be on, flashing (8a) and the unit
will shut off.
WARNING: If a Low Battery condition is indicated following
diagnostics, AERIS strongly recommends that you DO NOT at-
tempt to dive until the battery is replaced.
Before going diving, set the date/time, select audible alarm and FO2 default
(on/off), units of measure, and dive profile resolution.
Setting the FO2 'value' for the nitrox mix being used is a 'pre dive' setting that
must be entered before commencing your dives (see page 17).
WARNING: Date/time, FO2 default on/off, audible alarm on/off,
the FO2 value entered, and dive profile resolution must be re-
set if the battery is replaced.
To access the Set Mode, press both buttons simultaneously and momen-
tarily (less than 4 seconds) while in the Surface Mode.
Fig. 8
Fig. 7
a
NITROGEN
OXYGEN
NITROGEN
OXYGEN
a
12
The Advance (Upper) button is used to move to the available settings, and the
Select (Lower) button is used to choose the desired setting. If no buttons are
pressed within 2 minutes, the unit will revert to Surface Mode.
Set FO2 (50%) Default - on/off (9) - effect explained on pages 16 and 17.
• Factory set for Default 'On'. To turn the Default function 'Off':
• press both buttons simultaneously while in Surface Mode.
• press the Select (Lower) button to toggle between On and Off.
• press the Advance (Upper) button once to revert to Surface Mode.
Set Audible Alarm - on/off (10)
• Factory set for Alarm 'On'. To turn the Alarm function 'Off':
• press both buttons simultaneously while in Surface Mode.
• press the Advance (Upper) button 1 time to access the Alarm Mode.
• press the Select (Lower) button to toggle between On and Off.
• press the Advance (Upper) button once to revert to Surface Mode.
Set Units of Measure (11)
• Factory set for 'imperial'. To change to 'metric' (M and °C):
• press both buttons simultaneously while in Surface Mode.
• press the Advance (Upper) button 2 times to access the Units Mode.
• press the Select (Lower) button to toggle between Imperial and Metric.
• press the Advance (Upper) button once to revert to Surface Mode.
Fig. 9
Fig. 11
Fig. 10
NITROGEN
OXYGEN
NITROGEN
OXYGEN
FT
FT
NITROGEN
OXYGEN
13
SAVANT
Set Date/Time
• Factory set for January 1, 1997, 12:00 AM (midnight). To change:
• press both buttons simultaneously while in Surface Mode.
• press the Advance (Upper) button 4 times to access the Date/Time Mode.
The DATE screen will appear (12) with the Year 'flashing'.
Hint: To bypass a display that is flashing, do not press the Select (Lower) but-
ton, instead press the Advance (Upper) button to view the next function.
• press and hold the Select (Lower) button until the correct year appears.
• press the Advance (Upper) button once. The Month flashes.
• press and hold the Select (Lower) button until the correct month appears.
• press the Advance (Upper) button once. The Day flashes.
• press and hold the Select (Lower) button until the correct day appears.
• press the Advance (Upper) button once.
The TIME screen will appear (13) with the Hour 'flashing'.
• press and hold the Select (Lower) button until the correct hour appears.
• press the Advance (Upper) button once. The Minute flashes.
• press and hold the Select (Lower) button until the correct minute appears.
• press the Advance (Upper) button once to advance to the Profile Sampling
Mode, or press it 2 times to revert to the Surface Mode.
Fig. 12
Fig. 13
NITROGEN
OXYGEN
M
NITROGEN
OXYGEN
14
Set Dive Profile Sampling Rate (14)
This setting allows you to select the rate that the unit samples data points for
onboard storage and subsequent download to the Dive Downloader (DDA) PC
software program. It does not affect the rate that data is sampled for 'display'
during operation. Lower rates use more memory storage, so less dives can be
stored (expect only 8 profiles for 2FT setting, yet 36 for 10 FT setting).
• Factory set for 10 FT (3 M). To change:
• after having set the Time as described previously, or -
by pressing the Advance (Upper) control button 9 times while in the
Surface Mode.
• press and hold the Select (Lower) button until the desired rate appears.
(options: 2 FT/.5 M, 5 FT/1.5 M, 10 FT/3 M, 30 SEC, 60 SEC, 180 SEC)
• press the Advance (Upper) button once to revert to the Surface Mode.
External Access (EA) Mode (15) - refer to page 29 for instructions
Although this mode is within the sequence of settings, it does not have any set
points or selections. It provides user access to the PC download feature de-
scribed later. Also, the factory uses it to access diagnostic and calibration infor-
mation.
Fig. 15
Fig. 14
NITROGEN
OXYGEN
FT
NITROGEN
OXYGEN
15
SAVANT
PRE DIVE
and
DIVE
MODES
16
WARNING: The percentage of oxygen (FO2) in the nitrox mix
being used must be set 'before each' nitrox dive, unless the FO2
default feature has been turned 'off'.
The SAVANT can be used either as an Air computer or as a Nitrox computer.
After activation, it will operate as an Air computer without displaying informa-
tion associated with oxygen calculations, unless it is set for a percentage of
oxygen (FO2) other than Air (numerical value between 21 and 50 %).
When set with an FO2 value of 'Air', the SAVANT 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
(16), or subsequent dives, unless FO2 is set for a numerical value (21 to 50 %).
To verify that 'Air' is the FO2 value setting, press the Advance (Upper)
button 2 times to access the FO2 screen (17).
When FO2 is set at a value of 21%, the unit will remain set at 21% for subse-
quent nitrox dives until FO2 is set to a higher value, or until it automatically
turns off and is reactivated.
Once FO2 is set to a value 'greater than 21%' to match the nitrox mix being
used for that nitrox dive, the FO2 value displayed during the FO2 Mode that
appears 10 minutes after that dive will be -
Fig. 17
Fig. 16
NITROGEN
OXYGEN
FT
FT
MAX
NITROGEN
OXYGEN
17
SAVANT
• 50%, if the FO2 default is 'On' (18a), or -
• it will remain at the previous value set, if the FO2 default is turned 'Off'.
If the FO2 default is 'On', the FO2 value must be reset for each repetitive
nitrox dive, or the value will automatically be 50 and the dives will be calcu-
lated based on 50% O2 for oxygen calculations and 21% O2 (79% nitrogen) for
nitrogen calculations. If you surface for greater than 10 minutes during a
dive and the FO2 default is 'On' , a subsequent descent will be considered a
new dive and the FO2 value must be reentered.
Once a dive is made with the unit set as a nitrox computer (FO2 set for a nu-
merical value), the unit cannot be programmed to operate as an 'Air' computer
until 24 hours after the last dive. 'Air' will not be displayed as an option in the
FO2 Mode. However, you can set FO2 for 21% for use with air.
To set FO2 while in the Surface Mode:
• press the Advance (Upper) button 2 times.
• press and hold the Select (Lower) button to increase the FO2 value 1 (%)
per second from 21 to 50 (%), then display 'Air' again.
• when the proper value of FO2 is displayed (19a), release the button.
• the PO2 display that indicates the Maximum Depth that can be achieved
with an oxygen partial pressure of 1.60 ATA for the FO2 value set will
appear (19b). If FO2 is set for Air, the PO2 display will not appear.
• press the Advance (Upper) button to return to the Surface Mode.
Fig. 19
Fig. 18
FT
MAX
NITROGEN
OXYGEN
b
a
NITROGEN
OXYGEN
a
18
FT
NITROGEN
OXYGEN
Fig. 20
AERIS strongly recommends that you review the Dive Planner prior
to every dive to help you plan your dive as required to avoid exceed-
ing no decompression or oxygen exposure limits. This is especially im-
portant for repetitive dives, when the Planner indicates no decompression bot-
tom times (20a) that are available on your next dive, based on any residual ni-
trogen accumulation following your last dive and surface interval.
WARNING: The Dive Planner predicts only no decompression
times for subsequent dives. Depending on cylinder size, breath-
ing gas consumption, and oxygen accumulation you may have
less time available than indicated because of breathing gas
quantity or other limitations.
With each depth display, you will see either 'predicted' no decompression limits
based upon your previous dive profiles (if calculated to be nitrogen controlled),
or 'predicted' oxygen tolerance limits based upon either a single dive exposure
or your 24 hour accumulation of oxygen (if calculated to be oxygen controlled).
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 PO2 of 1.60 ATA will not be displayed.
a
19
SAVANT
To access the Dive Planner while in the Surface mode:
• press the Advance (Upper) button 3 times.
• press and hold the Select (Lower) button to view a sequence of depths
from 30 to 160 feet (9 to 48 meters) in 10 foot (3 meter) increments, or -
• press and release the button repetitively to view the information one in-
crement at a time.
• to revert to the Surface mode, press the Advance (Upper) button.
If the Nitrogen Bar Graph is displayed (21), that next dive is calculated to be
controlled by nitrogen loading. If the O2 bar graph and O2 symbol are dis-
played (22), it is calculated to be controlled by oxygen loading.
The SAVANT will store oxygen accumulation for up to 12 dives conducted dur-
ing a 24 hour period. If the maximum limit for oxygen loading has been ex-
ceeded for that day (24 hour period), all of the segments of the O2 bar graph
will be displayed flashing (23). Depth/Time values will not appear until the O2
bar graph recedes into the green (normal) zone (i.e., your daily oxygen dosage
decreases an amount equivalent to the amount accumulated during the latest
dive completed).
WARNING: The SAVANT must be manually activated and be in
an operating mode prior to start of a dive. The unit will not ac-
tivate automatically by immersion in water. Also, the FO2 set-
ting must be verified prior to each nitrox dive.
Fig. 21
Fig. 22
Fig. 23
FT
NITROGEN
OXYGEN
FT
NITROGEN
OXYGEN
NITROGEN
OXYGEN
Flashing
20
FT
FT
MAX
NITROGEN
OXYGEN
Once activated, the SAVANT will enter the No Decompression Dive Mode
(24) when you descend deeper than 5 feet (1.5 meters). Information includes
Current Depth, Elapsed Dive Time (and icon), Dive Time Remaining (and
Mode icon), Maximum Depth for that dive (and icon), and the bar graphs.
As your depth and elapsed dive time increase, the Nitrogen Bar Graph will fill
with segments (green toward red) to represent nitrogen loading. While as-
cending to shallower depths, it will begin to recede, offering a graphic repre-
sentation of your multilevel diving capability.
If FO2 was set for a numerical value, the O2 Bar Graph will fill with segments
(green toward red) to represent oxygen loading for that dive or 24 hour period,
whichever amount is greater.
Segments of the Ascent Rate Indicator fill (and recede) as your ascent rate in-
creases (and decreases) throughout the dive. When you exceed the maximum
recommended ascent rate of 60 feet per minute (18 meters per
minute), it will enter the red (Too Fast) zone (25a) and you will be alerted by
all segments of the bar graph flashing, and an audible alarm. The warnings
will stop when your ascent rate is slowed.
WARNING: Every effort should be made to keep each of the
bar graphs in the green throughout your dives to reduce your
risk of exposure to decompression sickness and oxygen toxicity.
Fig. 24
Fig. 25
FT
FT
MAX
NITROGEN
OXYGEN
a
21
SAVANT
FT
NITROGEN
OXYGEN
To activate the backlight, press the Select (Lower) button. The displays
will be illuminated for 5 seconds. Release and press again as desired.
To view Temperature (26a), press the Advance (Upper) button. It will re-
place Max Depth and Elapsed Dive Time for depression time plus 3 seconds.
A safety stop made between 15-20 feet (5-6.5 meters) is strongly rec-
ommended as a standard procedure before completing your ascent.
While you cannot provide a guarantee against the occurrence of de-
compression 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.
WARNING: Inspect your SAVANT prior to every dive, checking
for any signs of the entrance of moisture, damage to the button
membranes, or damage to the LCD display. If these or other
signs of damage are found, return the unit to an Authorized
AERIS Dealer. DO NOT attempt to use it until it has received
factory service.
Fig. 26
a
Responsible
22
SUMMARY OF ACCESS TO PRE DIVE AND DIVE MODES
To access a specific Pre Dive mode (no dive made) from the Surface Mode, press the button(s) as follows:
MODES TO ACCESS TO SET/VIEW
Backlight Lower '1' time
Time/Date Upper '1' time
FO2 set Upper '2' times Lower 'repetitively', or press and hold (to change)
Dive Planner Upper'3' times Lower 'repetitively', or press and hold (to change)
Log Mode Upper '4' times Lower 'repetitively', or press and hold (to change)
Set Mode Both '1' time See below
• FO2 Default (On/Off) Upper '0' time Lower '1' time (to change)
• Audible Alarm (On/Off) Upper '1' time Lower '1' time (to change)
• Units (Imperial/Metric) Upper '2' times Lower '1' time (to change)
• EA (external access) Upper '3' times refer to page 29
• Date (year,month,day) Upper '4, 5, 6' times Lower 'repetitively', or press and hold (to change)
• Time (hours, minutes) Upper '7, 8' times Lower 'repetitively', or press and hold (to change)
• Dive Profile Sampling Upper '9' times Lower 'repetitively', or press and hold (to change)
During the No Decompression Dive Mode, press the button(s) as follows:
MODES TO ACCESS
Backlight Lower '1' time
Temperature Upper '1' time
23
SAVANT
POST DIVE
MODES
24
NITROGEN
OXYGEN
When you ascend to 3 feet (1 meter) or shallower, the SAVANT will enter Sur-
face Mode (27) and begin counting your surface interval (27a).
The first 10 minutes is, in affect, a Transition Period. Information includes
Surface Mode icon (flashing), dive 'number', Surface Interval (colon flashing),
Temperature, Nitrogen and O2 Bar Graphs. During the 10 minutes -
To activate the backlight, press the Select (Lower) button.
To view the Date/Time for 5 seconds, press the Advance (Upper) button.
To access the Log Mode, press the Advance (Upper) button 2 times, or
once while the Date/Time are being displayed.
(That dive's data will be displayed, however, it will not be stored in the
unit's memory until the 10 minute transition period is completed.)
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.
Once 10 minutes have elapsed, the Surface Mode icon and Surface Interval
time display colon stop flashing indicating that the dive and transition period
are completed, and a descent will be a new dive.
Fig. 27
a
25
SAVANT
NITROGEN
OXYGEN
Remember!! You must ensure that the FO2 setting matches the spe-
cific nitrox mix being used for each nitrox dive.
To verify, or change, the FO2 setting (28) while in the Surface Mode:
• press the Advance (Upper) button 2 times.
• press the Select (Lower) button to change the setting.
If FO2 was set for a numerical value, the Maximum Depth that can be
achieved with an oxygen partial pressure of 1.60 ATA for the FO2 value
set will be displayed with the letters 'PO2' in the lower screen. If FO2
was set for Air', the PO2 screen will not appear.
During the first 2 hours after a dive, the Time to Fly and Desaturation
countdowns can be accessed by pressing the Advance (Upper) button 3 times
while in the Surface Mode. If a violation occurred during the dive,
Desaturation Time will not be displayed and a single dash ( - ) will appear in-
stead of the letters FLY.
The Fly counter (29a) is provided to assist you with deciding when enough
surface time has elapsed to fly (or travel to higher elevations). The countdown
starts 10 minutes after surfacing at 23:50 (hr:min) and counts down to 0:00.
The Desaturation counter (29b) provides calculated time for tissue
desaturation (release of nitrogen loading) at sea level. The countdown starts
Fig. 28
FT
MAX
NITROGEN
OXYGEN
Fig. 29
a
b
26
10 minutes after surfacing at 9:59 (hr:min) maximum and counts down to
0:00. If the time for desaturation is calculated to be greater than 9:59, the dis-
play will indicate 9:+ until it decreases to 9:59.
Two hours after the last dive, the Time to Fly and Desaturation countdowns
will be displayed continuously, counting down to 0:00. Access to other modes
is gained by pressing the Select (Lower) button to return to Surface Mode.
After a surface interval of 12 hours, you may choose to fly (or travel to higher
elevations), provided that your dive profile(s) did not enter decompression. If
your diving involved decompression or a repetitive, multi day profile, it is
strongly recommended that you wait a full 24 hours after your last dive to add
a greater degree of protection.
As you should be aware from your own training, the longer you wait
to fly (or travel to higher elevations) after diving, the more you will
reduce your exposure to decompression sickness.
During the first 2 hours after a dive, after the 10 minute Transition Period,
the Dive Planner can be accessed by pressing the Advance (Upper) button 4
times while in the Surface Mode, then pressing the Select (Right) button to
view the sequence. The Planner shows 'adjusted' Limits (30) based on residual
nitrogen and accumulated oxygen calculated to be remaining from the previ-
ous dives.
Fig. 30
FT
NITROGEN
OXYGEN
27
SAVANT
Two hours after the dive, while the Time to Fly and Desaturation countdowns
are displayed continuously, access is gained by first pressing the Select (Lower)
button to return to Surface 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 batteries are removed, but factory service will delete the logs.
Dives are displayed in a reverse sequence that starts with the dive most re-
cently recorded back to the oldest of the 12 dives stored. Thus, your most re-
cent dive will always be the first shown in the sequence. Each dive has three
log screens - date/time started, Nitrogen data, and Oxygen data. If FO2 was
set for 'Air' for that dive, the O2 screen will display 'FO2' and 'Air'.
To access the Dive Log Mode during the 10 minute Transition Period:
• press the Advance (Upper) button 2 times to view the Date/Time screen (31)
• Log Mode icon
• Date and Time of Day that the dive started.
• Dive Number (1 through 9) - a function of real time, the first dive after
midnight will be #1 for that calendar day. Example: If you do a night
dive at 10pm (no other dive that day), then a repetitive night dive at 1am,
'both' dives will appear in the log as #1 (differentiated by the Date).
Fig. 31
NITROGEN
OXYGEN
28
• press the Select (Lower) button 1 time to view the Nitrogen Log (32)
• Log Mode icon
• Dive Number
• Maximum Depth reached (and icon)
• Elapsed Dive Time (and icon)
• Surface Interval prior to that dive (and icon)
• Ascent Rate Indicator - showing the maximum vertical speed
• Nitrogen Bar Graph - showing tissue nitrogen loading at the time you
surfaced at the end of the dive.
• press the Select (Lower) button 1 time to view the Oxygen Log (33)
• 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 end of the dive.
• press the Select (Lower) button repeatedly to proceed through the previous
recorded dives.
During the first 2 hours after a dive, after the 10 minute Transition Period,
the Dive Log can be accessed by pressing the Advance (Upper) button 5 times
while in the Surface Mode.
Two hours after the dive, while the Time to Fly and Desaturation countdowns
Fig. 32
Fig. 33
FT
MAX
NITROGEN
OXYGEN
NITROGEN
OXYGEN
29
SAVANT
are displayed continuously, access is gained by first pressing the Select (Lower)
button to return to Surface Mode.
To exit Log Mode at any time press the Advance (Upper) button.
Using infrared linking hardware and a PC software program, dive data can be
downloaded (copied) from your SAVANT into an IBM compatible PC program
running on a Windows
®
95 or 98 operating system. Instructions are provided
with the download package that is available from your Authorized AERIS
Dealer. Ask for Dive Downloader for AERIS (DDA). The software program pro-
vides dive profile data, and nitrogen and oxygen loading throughout the dive.
To enter the External Access Mode while in the Surface Mode:
• press both control buttons simultaneously for less than 4 seconds.
• press the Advance (Upper) button 3 times. The letters EA appear (34).
• To revert to Surface mode, press the Advance (Upper) button 1 time, or -
• To initiate a download operation, press the Select (Lower) button 1 time.
• The letters EA begin flashing, and the download operation begins.
• As data is being downloaded to the PC, all segments of the LCD will be
displayed.
• When downloading is complete, the unit will revert to the Surface Mode.
Prior to attempting to download data from your SAVANT, refer
to the instructions provided in the User Manual that is incorpo-
rated into the CD rom of the Dive Downloader (DDA) package.
Fig. 34
NITROGEN
OXYGEN
30
SUMMARY OF ACCESS TO POST DIVE MODES
During the first 2 hours after a dive* (after the 10 minute Transition Period has ended), press the button(s)
as follows:
MODES TO ACCESS TO SET/VIEW
Backlight Lower '1' time
Time/Date Upper '1' time
FO2 set Upper '2' times Lower (hold or repetitive)
Fly/Desaturate Upper '3' times
Dive Planner Upper '4' times Lower (hold or repetitive)
Log Mode Upper '5' times Lower (hold or repetitive)
Set Mode Both '1' time Refer to page 22 of this Guide
EA Mode Both '1' time, Upper '3' times Lower '1' time
*After the First 2 Hours, the unit will remain in Fly Mode. To access other Modes:
• press the Lower button to return to the Surface Mode, then press the buttons as indicated above.
31
SAVANT
HANDLING
EXTREMES
32
FT
FT
NITROGEN
OXYGEN
The SAVANT is intended for use by recreational divers not engaged in
intentional decompression diving. Decompression features are pro-
vided only for emergency situations. By entering decompression, you au-
tomatically impose a “ceiling” above you which you cannot immediately ascend
beyond, denying you free access to the surface. The SAVANT is not in-
tended for use by military or commercial divers.
The SAVANT is a sophisticated instrument designed with capabilities that go
beyond the range of recreational diving with compressed air. It should not
be considered, however, that these built-in capabilities provide any
implied approval or consent from AERIS for individuals to exceed the
defined limits of recreational dive profiles, as agreed on by all inter-
nationally recognized training agencies.
Decompression diving should therefore be strictly avoided. The SA-
VANT
is designed to help you by providing a complete representation of how
close you are to entering decompression. In the event that you do inadvert-
ently enter Decompression, as indicated by the large red segment of the Ni-
trogen Bar Graph (35a), the SAVANT can provide you with limited information
to help you ascend to the surface.
Aeris strongly recommends that you avoid entering decompression,
and reminds you that decompression diving requires special training.
Fig. 35
a
33
SAVANT
FT
FT
NITROGEN
OXYGEN
The SAVANT cannot provide you with a backup breathing gas supply
for emergencies or the ascent line you will need, and decompression
diving greatly increases your risk of decompression sickness.
WARNING: Existing data for making planned decompression
dives is extremely limited, and virtually nonexistent for repeti-
tive decompression diving. You must therefore avoid decom-
pression diving and allow a surface interval of at least 24 hours
before reentering the water in the event a dive requiring emer-
gency decompression is made.
Upon entering decompression, you must immediately change the focus of your
dive to getting safely back to the surface. Upon seeing the Nitrogen Bar Graph
enter the red Decompression zone, you should immediately begin a safe con-
trolled ascent, 60 feet (18 meters) per minute or slower, to a depth slightly
deeper than or equal to the required ceiling stop depth indicated (36a) and
decompress for the stop time indicated (36b).
If you continue the dive at a depth more than a few feet (1 meter)
deeper than the required ceiling stop depth, your exposure to decom-
pression sickness will increase, and you will risk entering violation
mode and losing the information needed to ascend properly.
Your dive training taught you not to get too close to the No Decompression
Fig. 36
b
a
34
FT
FT
MAX
NITROGEN
OXYGEN
Limits. The yellow Caution zone of the Nitrogen Bar Graph (37a) offers
you a convenient way to monitor how close you are to the No Decompression
Limit. AERIS suggests always leaving the water with the Nitrogen Bar Graph
in the green No Decompression zone.
WARNING: Never exit the water with the Nitrogen Bar Graph
in the red Decompression zone. Doing so greatly increases the
risk of decompression sickness, and may result in injury or
death.
Body metabolism varies from person to person, and from day to day. If you
are feeling less than 100%, or you are in less than perfect physical shape, use
the yellow Caution zone as a visual reference to place a wider margin
of protection between you and the No Decompression Limit.
WARNING: AERIS recommends the application of responsible
diving practices and does not recommend decompression div-
ing, or diving deeper than 130 feet (39 m), as these practices
will greatly increase your risk of decompression sickness.
Information provided during Decompression Mode includes Current Depth,
Stop Depth and Time (and icon), and Total Ascent Time that includes stop
times required at all ceilings and vertical ascent time calculated at 60 feet (18
meters) per minute. The ceiling bar of the Decompression Mode icon will flash
Fig. 37
a
35
SAVANT
continuously (38a). The O2 bar graph and Ascent Rate Indicator will continue
to represent their respective information.
By pressing the Advance (Upper) button, an Alternate Display will appear
showing Maximum Depth (and icon) and Elapsed Dive Time (and icon) in the
lower screen (39) for button depression time plus 3 seconds.
The amount of decompression credit time is dependent on depth, with slightly
less credit given the deeper you are. You must not ascend shallower than
your decompression ceiling. Doing so will greatly increase your risk
of decompression sickness.
Once you have performed the required decompression, the SAVANT will switch
to the No Decompression Dive Mode, allowing additional time underwater.
Though more time is theoretically available, it is strongly recommended that
you spend the remainder of the dive continuing to decompress at, or slightly
deeper than 10 feet (3 meters), helping you reduce your tissue nitrogen loading
as much as possible.
WARNING: If you exceed certain limits, the SAVANT 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 of
the unit's functions for 24 hours after the dive in which a viola-
tion occurred.
Fig. 38
Fig. 39
FT
FT
NITROGEN
OXYGEN
a
FT
FT
MAX
NITROGEN
OXYGEN
36
FT
FT
NITROGEN
OXYGEN
FT
FT
NITROGEN
OXYGEN
The unit will enter the Conditional Violation Mode if you ascend shallower
(40a) than the required decompression ceiling indicated (40b). A momentary
rise above the ceiling, such as with a surge or swell, could cause this to happen.
The SAVANT will beep once per second and the Total Ascent Time display will
flash until you descend below the required decompression ceiling stop depth.
If you descend below the required ceiling 'before 5 minutes have elapsed', 1
1
/
2
minutes of penalty time is added to decompression stop time for each minute
above the ceiling. The added penalty decompression time will have to be
'worked off', 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 and the Nitrogen Bar Graph will recede
into the yellow Caution zone reverting to the No Decompression Dive Mode.
If you stay above (shallower than) the required ceiling stop depth 'for more
than 5 minutes', the Nitrogen Bar Graph segments will flash and the unit will
enter the Delayed Violation Mode (41).
Three conditions cause the SAVANT to enter the Delayed Violation Mode:
1. Remaining above the required Decompression Ceiling Stop Depth
for more than 5 minutes (41).
Fig. 40
a
b
Flashing
Fig. 41
Flashing
37
SAVANT
FT
FT
NITROGEN
OXYGEN
2. Decompression requires a ceiling stop depth between 60 feet (18
meters) and 70 feet/21 meters (42).
You must safely 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 (42a) to flash, until the ceiling stop depth indicates 50 FT/ 15 M.
3. Descending to deeper than 330 feet/99.5 meters (43).
NOTE: AERIS reminds you that the SAVANT is intended for no
decompression diving at depths within 130 feet (39 meters).
Expanded capabilities of the unit are provided as safety fea-
tures to assist you with emergency situations.
Five minutes after reaching the surface from a dive in which a Delayed Viola-
tion occurred, the SAVANT will enter an Immediate Violation Mode and
only operate in Gauge Mode for the next 24 hours.
WARNING: The SAVANT enters Immediate Violation Mode
when a situation totally exceeds its capacity to predict an as-
cent procedure. These dives represent gross excursions into
decompression that are beyond the boundaries and spirit of the
unit's design. If you are following these dive profiles, AERIS ad-
vises you not use a SAVANT dive computer.
Fig. 42
Flashing
Fig. 43
FT
FT
MAX
NITROGEN
OXYGEN
Flashing
a
38
NITROGEN
OXYGEN
FT
FT
MAX
NITROGEN
OXYGEN
Immediate Violation Mode occurs when a Decompression Stop depth much
greater than 60FT (18M) is required. The unit will emit a Single Long Beep
and then operate with limited functions (Current Depth, Max Depth, and
Elapsed Dive Time) in Gauge Mode (44) during the remainder of that dive and
for 24 hours after surfacing.
Underwater, the Gauge Mode is a continuation of the Immediate Violation
Mode that turns the unit into a digital instrument without any decompression
or oxygen monitoring functions. Dive Time Remaining will not be displayed
and the Nitrogen and O2 Bar Graphs flash as a warning.
After surfacing, Gauge Mode does not provide the Dive Planner, Time to Fly,
or Desaturation features. During the first 2 hours, Surface Mode will display
the surface interval, dive number, and temperature as the bar graphs flash to
indicate that a violation occurred. The countdown timer that appears when
the Advance (Upper) button is depressed does not represent Time to Fly. It is
only provided to inform you of the time remaining before normal operation can
resume with full features and functions of the unit. Two hours after the dive,
22:00 will be displayed with a single dash (45a).
NOTE: The SAVANT will remain in Gauge Mode until a full 24
hour surface interval is served. If a dive is made within the 24
hour period, it will operate in Gauge Mode only for that dive
and a full 24 hour surface interval will have to be served.
Fig. 44
Flashing
Fig. 45
a
39
SAVANT
FT
FT
MAX
NITROGEN
OXYGEN
Entering the Immediate Violation Mode, then Gauge Mode, will result in loss
of all decompression and oxygen monitoring functions for 24 hours after that
dive. This is considered a Permanent Violation.
WARNING: AERIS does not advocate diving to depths below
the maximum recommended sport diving depth limit of 130 feet
(39 meters). Any deeper dive, the basis for which is purely
theoretical, should be avoided. Special training, equipment,
and support are necessary for this type of diving.
The Maximum Depth the unit will display all of its features is 330 feet (99.5
meters). Upon exceeding 330 feet (99.5 meters), the Nitrogen and O2 Bar
Graphs will flash, and the Depth and Maximum Depth displays will only indi-
cate the letters 'oor' signifying that you are 'out of range' (46). Current
Depth will not reappear until you ascend shallower than 330 feet (99.5
meters). For the remainder of that dive, and in the log for that dive, only the
letters 'oor' will be displayed as the value for Maximum Depth.
There are few legitimate excuses for exceeding the maximum limits for expo-
sure to oxygen, and the consequences of CNS (Central Nervous System) oxy-
gen toxicity can be severe, resulting in Gran Mal convulsions and drowning.
Diving with enriched nitrogen-oxygen (nitrox) mixtures requires special train-
ing and certification.
Fig. 46
Flashing
40
WARNING: The oxygen features of the SAVANT 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.
By making a nitrox dive without the necessary training, preparation, and
equipment, you will have placed yourself in an unnecessarily dangerous situa-
tion. The unit is a sophisticated instrument designed with capabilities that go
beyond the range of recreational diving with compressed air.
It should not be considered, however, that these built-in capabilities
provide any implied approval or consent from AERIS for individuals
to exceed the defined limits of oxygen exposure, as agreed on by all
internationally recognized nitrox training agencies. Nitrox diving
should therefore be strictly controlled.
As depth increases during the dive, the partial pressure of oxygen in-
creases. As you approach the depth limit for the FO2 value set before the dive,
the SAVANT will alert you and display the PO2 level while you reduce oxygen
partial pressure according to your training.
The unit enters the High PO2 Dive Mode when partial pressure of oxygen
becomes equal to or greater than 1.40 ATA. The unit emits a double beep and
the PO2 value and symbol 'PO2' appear in the lower screen (47). The PO2 dis-
Fig. 47
FT
NITROGEN
OXYGEN
41
SAVANT
FT
FT
MAX
NITROGEN
OXYGEN
FT
NITROGEN
OXYGEN
play will remain on the screen until PO2 decreases below a 1.40 ATA.
When PO2 reaches the maximum allowed limit of 1.60 ATA, the unit emits 1
beep per second and the red segment of the O2 bar graph, PO2 value, and PO2
symbol flash as a warning (48) until PO2 decreases below 1.60 ATA. If you
continue the dive at your current depth, or descend deeper, your ex-
posure to CNS oxygen toxicity will increase.
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. The O2 bar graph provides a visual repre-
sentation of oxygen accumulation for either that dive or 24 hour period,
whichever is greater.
The O2 Bar Graph provides you with a convenient graphic representation of
your oxygen accumulation, displaying either oxygen accumulated during that
dive or during your repetitive dives conducted during that 24 hour period,
whichever of the two is greater at that time.
As your calculated accumulation of oxygen increases, the segments will fill the
O2 Bar Graph. Upon entering the yellow Caution zone (Fig. 49a), the SAVANT
emits a double beep as a warning. Use the yellow Caution zone as a vi-
sual reference to place a wider margin of protection between you and
the limits of oxygen exposure.
Flashing
Fig. 48
Flashing
Fig. 49
a
42
If accumulation exceeds the limit of oxygen tolerance (Oxygen Dive Time
Remaining is 0:00), the O2 Bar Graph will enter the red Danger zone and flash
as a warning (50) and the SAVANT will emit one beep per second until it enters
the Surface Mode. You must then focus on making a safe controlled ascent to
the surface to prevent further exposure.
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 allow-
able oxygen exposure (dose), you must allow a surface interval
of at least 24 hours before reentering the water.
During your surface interval, Plan Mode will only display the letters O2 (51),
until your accumulation decreases and the O2 bar graph recedes into the yel-
low Caution zone. Always keep the O2 Bar Graph in the green zone.
WARNING: DO NOT allow the O2 Bar Graph to enter the red
(Danger) zone. Doing so greatly increases the risk of CNS oxy-
gen toxicity, and may result in serious injury or death.
Aeris strongly recommends that you avoid exceeding oxygen expo-
sure limits, and reminds you that nitrox diving requires special train-
ing and understanding of the effects of oxygen toxicity.
Fig. 50
Fig. 51
Flashing
FT
FT
MAX
NITROGEN
OXYGEN
NITROGEN
OXYGEN
43
SAVANT
CARE
and
MAINTENANCE
44
The SAVANT is a sensitive electronic instrument. Although it has been de-
signed to withstand the rigors of diving, it still must be handled carefully to
protect from shock, excessive heat, chemical attack, and tampering. The hous-
ing is made of an impact resistant resin that is extremely shock resistant but is
susceptible to chemical attack and scratches.
CAUTION: Never spray aerosols of any kind on, or near, the in-
strument. The propellants may chemically attack the plastic.
If the transparent face becomes scratched, AERIS can replace it, although
small scratches will naturally disappear underwater. For even more conve-
nience and additional protection against scratches, place a transparent AERIS
Instrument Lens Protector on the gauge faces.
Soak and rinse the unit in fresh water following each dive, and check the low
pressure sensor guard cap to ensure it is free of debris or obstructions. To dis-
solve salt crystals, use lukewarm water or a slightly acidic vinegar/water bath.
After removal from the bath, place the unit under gently running water and
towel dry before storing. Transport your unit cool, dry, and protected.
WARNING: Never poke any object through any slots or holes of
the instrument. Doing so may damage the depth sensor, possi-
bly resulting in erroneous depth and/or dive time remaining
displays.
NITROGEN
OXYGEN
Prevent
Scratches
45
SAVANT
The SAVANT should be inspected annually by an Authorized AERIS Dealer
who will perform a factory prescribed function check and inspection for dam-
age 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 it is
working properly. The costs 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 SA-
VANT
depth readings, DO NOT attempt to dive with it until it
has been inspected by AERIS Customer Service.
To return your SAVANT to AERIS Customer Service:
• Take it to an Authorized AERIS Dealer, or -
• Package it using a protective cushioning material.
• Include a legible note stating specific reason for return, your name, ad-
dress, daytime phone number, serial number, and a copy of your original
sales receipt. (Authorized AERIS Dealers use a Product Return Form).
• Send prepaid and insured to the nearest AERIS service facility.
• If you have any questions regarding service, call AERIS Customer Service.
NOTE: Be sure to record all dives in your personal Log. Dive
log data will be erased when it receives factory service.
AERIS Customer Service
14212 Doolittle Dr.
San Leandro, Ca. 94577
(510) 346-0010, 8 to 5 PST
Fax: (510) 346-0015
Website: HTTP://
WWW.diveaeris.com
E-mail: info@diveaeris.com
46
NITROGEN
OXYGEN
The unit's battery consumption rate varies throughout periods of operation,
that 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, the manufacturer, model and age of the batteries
actually used, and use of the backlight.
Tests and calculations indicate that a new Tadiran
®
lithium battery will main-
tain unit operation for approximately 100 dives (2 dives each time the unit is
activated), or one year, whichever comes first. You could expect less dives if
only 1 dive is conducted each time the unit is activated, or more dives if 3 dives
are conducted each time the unit is activated. Yearly replacement is recom-
mended.
NOTE: The disposable battery supplied with the unit is not
covered by the SAVANT's limited 2 year warranty.
During Surface Mode(s), voltage level is checked every 10 minutes. If a low
battery condition is sensed, a Battery icon will appear to alert you (Fig. 52a).
Upon decreasing to a voltage level that will not maintain proper unit opera-
tion, the icon will flash for 5 seconds followed by shut down of the unit.
If the condition is sensed prior to a dive or during the first 2 hours after sur-
facing, the icon will appear while Surface Mode is displayed. If the condition
Total
# Dives
To
Expect
50
100
150
'Average'
# Dives
Each
Period
1
2
3
Fig. 52
a
47
SAVANT
is sensed while Fly Mode is being displayed continuously, starting 2 hours af-
ter surfacing, the icon will appear with the Fly countdown. If a low battery
condition occurs during the dive, there will be sufficient voltage to maintain
unit operation for the remainder of that dive and the icon will appear 10 min-
utes after surfacing from the dive.
AERIS strongly advises that you replace the battery and DO NOT at-
tempt to dive with the SAVANT 'any time' the Low Battery icon ap-
pears on the display. Also, to avoid any inconvenience, that you in-
stall a new battery prior to any multi-day dive trip that will include a
profile of numerous repetitive dives.
WARNING: Nitrogen and Oxygen calculations will be erased
when the batteries are replaced between repetitive dives. Also,
date and time settings will have to be reset.
WARNING: The following procedure must be closely adhered
to. Damage due to improper battery replacement is not cov-
ered by the product's limited 2 year warranty.
To replace the battery, examine the case back to find the battery hatch (53):
• The battery compartment should only be opened in a dry and clean envi-
ronment. Use care to prevent the entrance of moisture or dust.
• Remove the four screws that secure the battery hatch to the housing.
Fig. 53
Screws
+
+
+
+
Battery
Hatch
Case Back
48
• Lift the hatch up and out of the housing.
• Remove the battery and battery hatch o-ring. DO NOT use tools.
• O-ring replacement is highly recommended to ensure proper sealing.
• Closely check the battery hatch and the housing for any signs of damage
that might impair proper sealing and for any signs of corrosion indicating
entrance of moisture into the unit. If found, return your SAVANT to an
Authorized AERIS Dealer, and DO NOT attempt to use it until it has re-
ceived factory service.
WARNING: DO NOT attempt to remove any other component
parts. Doing so may cause a dangerous malfunction of the SA-
VANT
, resulting in possible injury or death. Indication of any
form of tampering will void the warranty.
• To replace the battery hatch o-ring (54a), lightly lubricate it with silicon
grease and place it around the raised portion (54b) located on the inner
side of the battery hatch.
NOTE: Use only the o-ring provided. It is molded to match the
contour of the battery hatch/compartment sealing surfaces
(54c/55d). Use of any other o-ring will void the warranty.
• Ensure that the o-ring is properly aligned and evenly seated.
Battery Hatch
O-ring (a)
Battery Hatch
b
a
b
Hatch
O-ring
Sealing
Surface (c)
(Inner Side)
Side View
Fig. 54
49
SAVANT
CAUTION: The o-ring must be aligned as indicated to prevent
leakage and possible malfunction.
• Place the new 3.6 volt TADIRAN
®
1/2AA lithium battery, model TL-2150,
or equivalent, into the battery compartment ensuring proper orientation -
positive (+) toward the clip (55e) and negative (-) toward the spring (55f).
• Carefully place the battery hatch with o-ring into position ensuring that
the o-ring stays in place, is aligned, and seals properly.
• Secure the hatch with the four new screws - use 2 long (55g) ones at the
top and 2 short (55h) ones at the bottom. The outer surface of the bat-
tery hatch should be flush with the outer surface of the housing. DO
NOT overtighten, or attempt to use any other screws.
If moisture or corrosion is found in the battery compartment, it is best to have
your SAVANT inspected and cleaned by an Authorized AERIS Dealer.
NOTE: For any cause of flooding other than a bad o-ring, re-
turn the SAVANT for factory service.
If you are conducting a repair in the field, proceed as follows:
• Inspect the lens and case to ensure they are not cracked or damaged.
• Inspect the button coverings to ensure they do not have cuts or holes.
• Remove and discard the battery and battery hatch o-ring.
Fig. 55
+
-
Case Back
d
e
f
Battery
(1/2AA)
Battery Hatch
with O-ring
+
-
g
g
h
h
50
• Check the battery hatch o-ring seating surfaces for damage (nicks, cuts,
divots, etc.). If found, DO NOT use. Return the unit to AERIS.
• Flush the battery hatch and compartment with a solution of 50% white
vinegar and 50% water. Rinse with fresh water, and allow to dry over-
night, or blow dry with a hair dryer (set at 'no heat'). Ensure there is no
moisture around the inside base of the battery compartment and hatch.
• Install the o-ring and battery as previously described.
• Activate the SAVANT 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 there are any portions of the display missing or appearing dim, return
your SAVANT to an Authorized AERIS Dealer to receive factory service.
Care and maintenance is simple and easy, and with a small investment of your
time you will keep your SAVANT in top condition for many years of diving en-
joyment.
Be a RESPONSIBLE DIVER at all times !
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REFERENCE
52
* excerpted from “The UHMS Flying After Diving Workshop”
** excerpted from “DAN’s Current Position on Recreational Flying After Diving”.
In 1990 the Undersea and Hyperbaric Medical Society (UHMS) published a set of guidelines aimed at minimiz-
ing 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).
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.
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 ex-
tended surface interval beyond 12 hours before flight”.
Both the UHMS and DAN agree that “There can never be a flying after diving rule that is guaranteed to pre-
vent 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”.
53
SAVANT
To reduce the risk of developing decompression sickness after a single no decompression dive, current guide-
lines 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.
WARNING: Diving at high altitude requires special knowledge of the variations imposed
upon divers, their activities, and their equipment by the decrease in atmospheric pres-
sures. AERIS recommends completion of a specialized Altitude training course by a recog-
nized training agency prior to diving in high altitude lakes or rivers.
Atmospheric pressure decreases as altitude increases above sea level. Weather systems and ambient tem-
perature 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 SAVANT 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.
Whenever the SAVANT is manually activated at altitudes higher than 2,000 feet (610 meters), it will automati-
cally 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 SAVANT automatically clears of any re-
sidual nitrogen and oxygen loading and resets to operate at the new altitude.
54
WARNING: Altitude compensation provided by the SAVANT takes place when the unit is ac-
tivated. DO NOT dive at any different altitude until the unit shuts off. It will recalibrate
automatically when reactivated at the new altitude.
Both central nervous system (CNS) oxygen toxicity and pulmonary oxygen toxicity were taken into consider-
ation when the current maximum limits for exposure to oxygen (Fig. 56) were published by NOAA in the
October 1991 NOAA Diving Manual. 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.
CNS oxygen toxicity is not considered likely at PO2 levels below 1.30 ATA. It is however related to 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.
WARNING: Diving with enriched nitrogen-oxygen (nitrox) mixtures requires special knowl-
edge of the variations imposed upon divers, their activities, and their equipment by the in-
creased percentage of oxygen. AERIS recommends completion of a specialized Nitrox train-
ing course by a recognized training agency prior to diving with any enriched nitrogen-oxy-
gen (nitrox) mixtures.
The SAVANT tracks twelve tissue compartments with halftimes ranging from 5 to 480 minutes. The Nitro-
gen 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. 57).
The tissue compartment that has filled up fastest is the only one the viewer can see from the top.
55
SAVANT
Fig. 56 - Oxygen Exposure Limits
Maximum
Exposure Time
PO2
(ATA)
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
1.60
Per Dive
(Min)
720
570
450
360
300
240
210
180
150
120
45
Per 24hr
(Min)
720
570
450
360
300
270
240
210
180
180
150
Fig. 57 - Nitrogen Bar Graph
DECO
C.Z.
NO DECO
DECO
C.Z.
NO DECO
DECO
C.Z.
NO DECO
DECO
C.Z.
NO DECO
DECO
C.Z.
NO DECO
DECO
C.Z.
NO DECO
DECO
C.Z.
NO DECO
13
20
12
40
11 80
10
120
9 160
etc.
etc.
No. of
Segments
Tissue
Half-Time
Display Seen by the Diver
56
At any particular point, one tissue compartment may be absorbing nitrogen, while another that was previously
higher may be off-gassing. Figure 58 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 multi-
level diving, one of the most important contributions the SAVANT offers you. Take advantage of this feature
and make all of your dives multilevel dives.
Note how the No Decompression Limits for the SAVANT are contrasted with the U.S. Navy limits (Fig. 59).
For most depths, the SAVANT provides somewhat less no decompression times than the U.S. Navy Tables.
However, while the No Decompression Limits may be less, you will receive increased allowable dive times as
you take advantage of the multilevel dive capabilities offered by the SAVANT. Notice also that the Dive Plan-
ner does not scroll past 160 feet (48 meters).
The decompression model used by the SAVANT is based on the no decompression multilevel repetitive dive
schedules successfully tested by Dr. Ray Rogers and Dr. Michael Powell. These tests did not include repetitive
dives deeper than 90 feet (27 meters) or decompression dives. Due to the present unavailability of statistical
data, SAVANT decompression predictions are based on U.S. Navy theory. Therefore, pay special attention to
the following warnings.
WARNING: Using the SAVANT, just as using the U.S. Navy (or other) No Decompression
Tables, is no guarantee of avoiding decompression sickness, i.e. “the bends.”
The SAVANT is an informational tool whose entire worth depends on understanding all of its features and
functions, and using it correctly. Learn how to use it and use it wisely. Be a responsible diver!
57
SAVANT
SAVANT U.S.
Depth NDL-mins. Navy
feet (meters) Eng (Metric) NDL -mins.
30 (9) 260 (283) - - -
35 - - - - - - 310
40 (12) 137 (144) 200
50 (15) 80 (84) 100
60 (18) 57 (58) 60
70 (21) 40 (41) 50
80 (24) 30 (31) 40
90 (27) 24 (26) 30
100 (30) 19 (20) 25
110 (33) 16 (16) 20
120 (36) 13 (13) 15
130 (39) 10 (11) 10
140 (42) 9 (9) 10
150 (45) 8 (8) 5
160 (48) 7 (7) 5
170 (51) * * 5
180 (54) * * 5
190 (57) * * 5
[* The SAVANT will not scroll past 160 feet (48 meters), or
when projected bottom /descent time is less than one minute.]
Fig. 59 - No Decompression LimitsFig. 58 - Control Hand-over
DECO
C.Z.
NO DECO
DECO
C.Z.
NO DECO
DECO
C.Z.
NO DECO
12
v
12^ 40
20
No. of
Segments
Tissue
Half-Time
Display Seen by the Diver
12
v
58
SPECIFICATIONS
NO DECOMPRESSION MODEL
Basis:
Modified Haldanean Algorithm
12 tissue compartments
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 stop 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
OPERATIONAL MODES
Activation/Diagnostic
Surface
Date/Time
FO2 Set Point
Dive Planner
Set -
• FO2 Default (on/off)
• Audible Alarm (on/off)
• Unit (imperial / metric)
• External Access (to download)
• Date (year, month, day)
• Time (hour, minutes)
• Dive Profile Resolution
No Decompression Dive
Decompression Dive
Alternate Decompression Dive
Violation (conditional, delayed, & immediate)
Gauge
High PO2 Level
High Oxygen Accumulation
Temperature
Dive Log (nitrogen & oxygen)
Time to Fly and Desaturate
59
SAVANT
SPECIFICATIONS (continued)
DISPLAY RANGE/RESOLUTION
Numeric Displays:
Range: Resolution:
Dive Number 0 - 9 1
Depth 0 - 330 ft (0 - 99.5 m) 1 ft (.5 m)
Maximum Depth 330 ft (99.5 m) 1 ft (.5 m)
FO2 Set Point 21 - 50 % 1 %
PO2 Value 1.40 - 5.00 ATA .01 ATA
Dive Time Remaining 0 - 9 hr. 59 min. 1 minute
Total Ascent Time 0 - 9 hr. 59 min. 1 minute
Decompression Stop Time 0 - 99 min. (per stop depth) 1 minute
Elapsed Dive Time 0 - 9 hr. 59 min. 1 minute
Surface Time 0 - 23 hr. 59 min. 1 minute
Dive Log Surface Interval 0 - 25 hr. 59 min. 1 minute
Time to Fly 23 hr. 50 min. - 0* 1 minute
(* starting 10 min. after the dive)
Time to Desaturate 9 hr. 59 min. - 0* 1 minute
(* starting 10 min. after the dive)
BAR GRAPHS
Nitrogen Bar Graph:
segments
No Decompression zone (green) 9
No Deco Caution zone (yellow) 2
Decompression Warning zone (red) 1
Oxygen (O2) Bar Graph:
segments
Normal zone (green) 9
Caution zone (yellow) 2
Danger zone (red) 1
Ascent Rate Indicator:
segments feet/min. meters/min.
0 0 - 20 0 - 6
Normal zone (green) 1 21 - 30 6.5 - 9
Caution zone (yellow) 2 31 - 40 9.5 - 12
3 41 - 50 12.5 - 15
4 51 - 60 15.5 - 18
Too Fast zone (red flashing) 5 61+ 18.5+
Special Displays:
Occurrence
Diagnostic Display Activation
Out of Range (oor) >330 feet (>99.5 meters)
Gauge Mode Countdown Timer 24-00 hours (after violation)
OPERATIONAL PERFORMANCE
Function:
Accuracy:
Depth ± 1% of full scale
Timers 1 second per day
Dive Counter:
Displays Dives #1, 2, 3, 4, 5, 6, 7, 8, 9, 0 (continues #1 to #0)
Displays #0 for dives #10, #20, #30, 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
Each nitrox dive displays a Nitrogen and Oxygen Log screen
60
SPECIFICATIONS (continued)
ACCESSORIES
Optional items available from your Authorized A
ERIS Dealer:
• P/N 10.0023 Lens Protector (computer module) - adheres to lens
face, prevents scratches
• P/N 10.0031 Dive Downloader (DDA) - PC download package
(hardware & software)
• P/N 10.0041 Battery Kit - includes 1 battery, 1 battery hatch
o-ring, 4 battery hatch screws, silicon grease
OPERATIONAL PERFORMANCE (continued)
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
Power
• Battery 1 - 3.6 v, 1/2AA TADIRAN® Lithium, model TL-2150
• Shelf life Up to 10 years
• Replacement User replaceable (annual recommended)
• Life expectancy 100 dives, or 1 year, whichever comes first
Activation/Shutoff
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.
Automatically shuts off if no dive is made within 120 minutes after initial
activation. Manual reactivation required.
Automatically shuts off 24 hours after last dive.
• Cannot be shut off manually.
Setting FO2
• Automatically set for 'Air' upon activation
Remains set for Air unless an FO2 numerical value is set
Nitrox set points from 21 to 50 %
If set for 21%, remains set for 21% until changed
If set for >21%, reverts to 50% 10 minutes after the dive (however, if the
FO2 default setting is 'Off', the previous value set will be maintained).
61
SAVANT
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 SAVANT).
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 on the SAVANT 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.
Caution Zone - The yellow sections of the Nitrogen Bar Graph and O2 Bar Graph that gives a visual warning
of a diver’s proximity to respective decompression or oxygen tolerance 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).
DCS - Abbreviation for decompression sickness, i.e., “the bends”.
DDA - Abbreviation for Dive Downloader AERIS.
DECO - Abbreviation for Decompression.
Decompression Ceiling - The shallowest depth a diver may reach upon ascent without risking decompression
sickness.
GLOSSARY
62
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 Downloader - An AERIS name for a PC interface hardware/software package.
Dive Log Mode - A computer display of previous dive information.
Dive Planner - 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.
Dive Time Remaining - A display of the time before a diver must surface based on no-decompression status.
Elapsed Dive Time - The total time spent underwater during a dive between 5 feet (1.5 meters) on initial de-
scent to 3 feet (1 meter) on final ascent.
FO2 - The fraction (percent / 100) of oxygen (O2) in the breathing gas mixture.
Icon - a small pictorial representation of an operational mode
LCD - Abbreviation for liquid crystal display, an easily viewed low voltage display usually found on dive computers
Maximum Depth - The deepest depth attained during a dive.
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.
63
SAVANT
GLOSSARY (continued)
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.
NOAA - Abbreviation for National Oceanic and Atmospheric Administration.
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 accumlation 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.
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.
64
RESPONSIBLE COMPUTER DIVING
Since the advent of dive computers, it is a common mistake to assume that the old traditional rules of diving
no longer apply, but the truth is just the opposite. Keep these basic rules in mind:
Plan each dive, and dive your plan - Your computer was not designed to make decisions for you, only
to provide you with the information you need to make responsible decisions for yourself. This begins with
a dive plan that will help you avoid a low air or decompression situation.
Do not plan any dive that exceeds your training or experience level.
Inspect your computer before every dive - If it shows any signs of damage or abnormal function, DO
NOT dive with it until it has received factory service.
Make your deepest dive first - When making repetitive dives, it is imperative to ensure that each con-
secutive dive is shallower than the one before. This will allow your body's slower tissues to continue out-
gassing nitrogen.
Make the deepest part of your dive first, and gradually work your way to the surface using a
“staircase” profile - The ability to perform multilevel diving is one of the most important contributions
of a dive computer, and you should take advantage of it. It will increase your bottom time and at the
same time decrease your risk of decompression sickness.
Ascend slowly by following an ascent line whenever possible, or by ascending diagonally to-
ward the surface - Watch the Ascent Rate Iindicator closely while you ascend, and keep it in the green
zone as much as possible.
Make a safety stop at 15-20 feet (4.5-6 m) at the end of every dive - A safety stop of as little as 5
minutes has been shown to have a dramatic effect on the bubble formation in divers. It's important.
Don't forget it.
65
SAVANT
While No Decompression diving, if you find that any major piece of equipment is not functioning
correctly, you must abort the dive immediately and surface slowly in a controlled manner. If your
SAVANT stops working for any reason, it is important that you have anticipated this possibility and are pre-
pared for it. This is an important reason to avoid pushing the No Decompression and Oxygen Tol-
erance Limits, and a critical reason to avoid entering decompression. Regardless of your diving hab-
its, AERIS advises you to dive with additional backup instrumentation that can provide the data necessary to
properly surface if and when your primary instruments fail.
If you dive in situations where your trip would be ruined or your safety would be jeopardized by
losing the use of your SAVANT, an analog or digital backup system or use of standard air (or
nitrox) tables is highly recommended.
Although the SAVANT represents the latest in user friendly dive computer technology, it cannot
force you to understand how to use it. Before diving with the SAVANT, be sure you thoroughly
understand its functions and displays. Contact your local Authorized AERIS Dealer if you have a
question. Above all remember, technology is not a replacement for training, experience, and
common sense !
Responsible
66
SERVICE RECORD
Serial Number ________________
Date of purchase ______________
Purchased from _______________
Below to be filled in by an Authorized AERIS Dealer:
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Date Service Performed Dealer / Technician
THE CODE OF THE
RESPONSIBLE DIVER
AS A RESPONSIBLE DIVER
I UNDERSTAND AND ASSUME
THE RISKS I MAY ENCOUNTER
WHILE DIVING.
RESPONSIBLE DIVING BEGINS WITH
• DIVING WITHIN THE LIMITS OF MY
ABILITY AND TRAINING
• EVALUATING THE CONDITIONS
BEFORE EVERY DIVE AND MAKING
SURE THEY FIT MY PERSONAL
CAPABILITIES
• BEING FAMILIAR WITH AND
CHECKING MY EQUIPMENT BE-
FORE AND DURING EVERY DIVE
• KNOWING MY BUDDY'S ABILITY
LEVEL AS WELL AS MY OWN
• ACCEPTING THE RESPONSIBILITY
FOR MY OWN SAFETY ON EVERY
DIVE
67
SAVANT
FT
M
M
FT
MAX
NITROGEN
OXYGEN
S
A
V
A
N
T
TM
TM
a
a. Nitrogen Bar Graph
b. Ascent Rate Indicator
c. Oxygen (O2) Bar Graph
d. Icon - Operating Mode (detail A)
e. Icon - Elapsed Dive Time
f. Icon - Deco Stop Ceiling
g. Icon - Audible Alarm
h. Icon - Log Mode
i. Icon - Low Battery
j. Control Button - Advance
k. Control Button - Select
l. Interface Sensors
j
b
i
h
g
e
f
d
k
c
l
Surface Mode
No Decompression Dive
Decompression Dive
Plan Mode
(flashing
bar)
Detail 'A'
Operating Mode Icons
Doc. No. 12-7020 (10/98)© 2002 Design 1998
73


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