Sherwood Scuba VISION User manual

Doc. 12-7808-r01 (8/26/14)
©2002 DESIGN (2014)
VISION
MANUAL

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VISION MANUAL
©2002 DESIGN (2014)
WARNINGS........................................................................................3
NOTICES............................................................................................4
FEATURES AND FUNCTIONS.......................................................5
DISPLAY ICONS...........................................................................6
ABBREVIATIONS/TERMS..........................................................6
OVERVIEW....................................................................................7
ACTIVATION.................................................................................7
MENU SYSTEM............................................................................7
AUDIBLE ALARM........................................................................8
PCINTERFACE.............................................................................8
POWER SUPPLY...........................................................................9
OPERATINGMODES.................................................................10
Transition Period (post dive)...................................................10
Power Saver Mode...................................................................10
NORM SURFACE MODES............................................................11
NORM SURF MAIN AND ALTS.............................................. 12
NORM MAIN MENU................................................................. 12
Fly/Desat....................................................................................13
NORM Plan Mode...................................................................13
Log Mode..................................................................................13
Set Menu...................................................................................14
Select Dive Operating Mode....................................................14
History Mode............................................................................15
ID - SN.......................................................................................15
NORM Dive Preview................................................................15
Set Groups.........................................................................................15
Set F (FO2) Menu.........................................................................16
Set A (Alarms) Menu....................................................................16
Set U (Utilities) Menu..................................................................17
Set T (Time/Date) Menu..............................................................17
Set S (Shortcut) Menu..................................................................18
Set D (Dive Main) Menu..............................................................18
Set P (Preview) Menu...................................................................18
DIVE MODE FEATURES...............................................................19
WET ACTIVATION.....................................................................20
BACKLIGHT................................................................................20
BAR GRAPHS..............................................................................20
CONSERVATIVE FACTOR.......................................................20
DEEP STOP..................................................................................21
SAFETY STOP.............................................................................21
DIVE TIME REMAINING (DTR).............................................21
No Deco DTR (NDC)................................................................21
O2 DTR (OTR).........................................................................21
AIR TIME REMAINING (ATR)................................................22
NORM Dive Mode Structure.......................................................22
NORM DIVE MODES.....................................................................23
NO DECO MAIN AND ALTS.....................................................24
DEEP STOP (DS).........................................................................25
SAFETY STOP (SS).....................................................................25
DECOMPRESSION.....................................................................26
VIOLATIONMODES..................................................................27
HIGH PO2....................................................................................28
HIGH O2.......................................................................................29
CONTENTS
GAS SWITCHING...........................................................................30
OVERVIEW..................................................................................31
NORM GAS SWITCH MENU...................................................31
GAUG OP MODE............................................................................32
GAUG SURFACE MAIN AND ALTS......................................33
GAUG MENU............................................................................33
GAUG Set Groups..................................................................34
GAUG DIVE MODE.................................................................35
Main and ALTs.......................................................................35
Delayed Violation....................................................................35
COMPASS MODE...........................................................................36
COMPONENTS............................................................................37
OVERVIEW..................................................................................38
COMPASS MENU.......................................................................38
NORTH MODE............................................................................38
REFERENCE MODE..................................................................38
REFERENCE MENU..................................................................38
CALIBRATION............................................................................39
DECLINATION............................................................................40
ALARMS.......................................................................................40
REFERENCE....................................................................................41
DECOMPRESSION MODEL.....................................................42
TISSUE COMPARTMENT CONTROL...................................42
NO DECOMPRESSION LIMITS..............................................42
OXYGEN EXPOSURE LIMITS................................................42
ALTITUDE DIVING....................................................................42
FLYING AFTER DIVING...........................................................43
PCINTERFACE...........................................................................44
PC Requirements......................................................................44
CARE AND CLEANING.............................................................45
INSPECTIONS AND SERVICE.................................................45
BATTERYREPLACEMENT......................................................45
RESET DURING A DIVE...........................................................47
HIGH PRESSURE QUICK DISCONNECT.............................47
TECHNICAL DATA........................................................................48
DSAT ALGORITHM NDL CHART...........................................49
SPECIFICATIONS.......................................................................50
INSPECTION/SERVICE RECORD..............................................52

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VISION MANUAL
©2002 DESIGN (2014)
WARNINGS
• The Vision 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) breathing gas 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 certication, and certication in diving with enriched nitrogen-oxygen mixtures (nitrox) be-
fore using the Vision for nitrox diving.
• 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 manual completely before diving with the Vision.
• If you do not fully understand how to use this dive computer, or if you have any questions, you should seek instruc-
tion in its use from your authorized Sherwood Scuba dealer before you utilize this product.
• If your Vision stops working for any reason while operating, it is important that you have anticipated this possibil-
ity and are prepared for it. This is an important reason for not pushing the tables, oxygen exposure limits, and a
critical reason to avoid entering decompression, without proper training. If you dive in situations where your trip
would be ruined or your safety would be jeopardized by losing the use of your Vision, a backup instrument system
is highly recommended.
• 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.
• Remember that technology is no substitute for common sense, and a PDC only provides the person using it with
data, not the knowledge to use it. Remember also that the PDC does not actually measure and test the composition
of your body tissue and blood. Using a Sherwood Scuba PDC, just as using the U.S. Navy (or other) Decompression
Tables, is no guarantee of avoiding decompression sickness. Every diver’s physiology is different, and can even
vary from day to day. No machine can predict how your body will react to a particular dive prole.
• Diving at high altitude requires special knowledge of the variations imposed upon divers, their activities, and their
equipment by the decrease in atmospheric pressures. Sherwood Scuba recommends completion of a specialized
altitude training course by a recognized training agency prior to diving in high altitude lakes or rivers.
• Repetitive dives in a series should only be conducted at the same Altitude as that of the rst dive of that series. Re-
petitive dives made at a different Altitude will result in an error equal to the difference in barometric pressure, and
possibly a false dive mode with erroneous data.
• If the Vision is activated at an elevation higher than 14,000 feet (4,270 meters), it will immediately shutdown.
• Decompression diving, or diving deeper than 130 FT (39 M), will greatly increase your risk of decompression sick-
ness.
• Using an Vision is no guarantee of avoiding decompression sickness.
• The Vision enters Violation Mode when a situation exceeds its capacity to predict an ascent procedure. These dives
represent gross excursions into decompression that are beyond the boundaries and spirit of the Vision's design. If
you are following these dive proles, Sherwood Scuba advises that you should not use an Vision.
• If you exceed certain limits, the Vision will not be able to help you get safely back to the surface. These situations
exceed tested limits and can result in loss of some functions for 24 hours after the dive in which a violation oc-
curred.

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VISION MANUAL
©2002 DESIGN (2014)
NOTICES
LIMITED TWO-YEAR WARRANTY
Sherwood Scuba guarantees, to the original purchaser only, that the Vision will be free of defects in materials and/or craftsmanship under
normal recreational multilevel scuba use for two years from date of purchase, provided proper care and annual service are performed as
described within this owner’s guide. Should your Vision prove to be defective for any reason (other than those listed in the limitations section
below) it will be repaired or replaced (at Sherwood Scuba's discretion) free of charge excluding shipping and handling charges.
This warranty will be considered void if the registration card is not lled out completely at the time of purchase and mailed to Sherwood Scuba
within 30 days of purchase, and/or if the annual inspection is not done according to this owner’s manual. This warranty is non-transferrable
and applies to the original purchaser only. All correspondence concerning this warranty must be accompanied by a copy of the original sales
receipt and a copy of the owner’s portion of the warranty registration card including the annual inspection record.
Once each year you must return the Vision to an Authorized Sherwood Dealer within 30 days of the original purchase date anniver-
sary to keep the two year limited warranty in force. Annual inspection includes verication of depth accuracy and proper general function.
Labor charges for the annual inspection are not covered by the warranty. You must provide a copy of the original sales receipt and a copy of
the owner’s portion of the warranty registration card including the annual service record to obtain warranty service.
Statement of Limitations - General:
Warranty does not cover damage from accident, abuse, battery leakage, tampering, lack of proper care and maintenance and/or
proper annual servicing, or improper use of the Vision. Modications or repair by anyone other than a Sherwood Sales and Service Cen-
ter authorized to service the Vision will void the warranty. Sherwood Scuba will not be responsible for recovery or replacement of the product
in the event of loss or theft. Sherwood Scuba, its distributors, and retailers make no warranties, either expressed or implied, with respect to
this product or its owner’s manual except those stated in the preceding paragraphs. In consideration of the sale of the Vision to you, you
agree and understand that in no event will Sherwood Scuba, its distributors or retailers, be held liable for any personal injuries
resulting from its operation, or for any other damages whether direct, indirect, incidental, or consequential even if Sherwood Scuba
is advised of such damages.
Some states do not allow the exclusion or limitation of implied warranties or liabilities for incidental or consequential damages, so the above
limitation may not apply to you.
Warranty does not extend to the plastic gauge face, o-rings, batteries, or damage due to accident, abuse, modication, or tampering.
COPYRIGHT NOTICE
This manual 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 Sherwood Scuba LLC / 2002 Design.
Vision Manual, Doc. No. 12-7808 © 2002 Design, 2014
TRADEMARK, TRADE NAME, AND SERVICE MARK NOTICE
Sherwood, LLC and the Sherwood Scuba logo are registered or unregistered trademarks of Sherwood Scuba LLC. Vision and the Vision logo
are trademarks of Sherwood Scuba LLC. All rights are reserved.
PATENT NOTICE
U.S. Patents have been issued, or applied for, to protect the following design features:
Data Sensing and Processing Device (U.S. Patent no. 4,882,678). Other patents pending. User Setable Display (U.S. Patent no. 5,845,235) is
owned by Suunto Oy (Finland).
DECOMPRESSION MODEL
The program within the Vision simulates the absorption of inert gases 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 Vision dive computer model is based upon the latest research and
experiments in decompression theory. Still, using the Vision, 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 prole.
RESPONSIBLE COMPUTER DIVING
• Always plan each dive
• Always limit your dive to the level of your training and experience
• Always make your deepest dive rst
• Always make the deepest part of every dive rst
• 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 manual thoroughly before using the Vision.
Responsible

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FEATURES
AND
FUNCTIONS

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©2002 DESIGN (2014)
FO2 is set
for Nitrox
Conservative
is On
Log
Depth id
Temp or
Heading
Press
id
Low
Battery
value is FO2
Dot Matrix
Air Time Remaining
Total Ascent Time
time is Minutes
Surface Interval
value is
Time
value is PO2
ACTIV = Activation
AL = Alarm
ALT = Alternate
ATR = Air Time Remaining
AUD = Audible
AVAIL = Available
BATT = Battery
CAL = Calibrate (compass)
CDT (CD) = Countdown Timer
CONSERV = Conservative Factor
DD = Descending Depth (alarm)
DECO = Decompression
DSAT = Algorithm type
DESAT = Desaturation Time
DFLT = Default
DTR = Dive Time Remaining
DURA = Duration (backlight)
E = East (compass)
EDT = Elapsed Dive Time
EL = Elevation (altitude)
FO2 = Fraction of Oxygen (%)
FORM = Format (date, time)
FT = Feet (depth)
GAUG = Digital Gauge Dive Mode
GLO = Glow (backlight)
HIST = History
LO = Low (battery)
M = Meters (depth)
MIN = Minutes (time)
N = North (compass)
NDC = No Deco DTR
NDL = No Deco Limit
NE = Northeast (compass)
NO = Number
NO-D = No Decompression
NORM = Normal Dive Mode
NW = Northwest (compass)
O2 = Oxygen
OTR = O2 DTR
PCI = PC Interface
PO2 = Partial Pressure of O2 (ATA)
PRESS = Pressure
REF = Reference (compass)
S = South (compass)
SAFE = Safety (stop)
SE = Southeast (compass)
SEC = Seconds (time)
SN = Serial Number
SURF = Surface
SW = Southwest (compass)
SWCH = Switch (gas)
TAT = Total Ascent Time (deco)
TLBG = Tissue Loading Bar Graph
TMR = Timer
VIOL = Violation
W = West (compass)
ABBREVIATIONS/TERMS

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S
MA
Fig. 1 - Diagnostic Check
(for 3 sec, then My Info)
OVERVIEW
INTERACTIVE CONTROL CONSOLE
The Interactive Control Console utilizes 3 control buttons that are referred to as M, A, and S.
• M (left front) - Menu, Mode, Minus (decrease)
• A (right front) - Advance, Add (increase).
• S (right side) - Select, Save.
ACTIVATION
To activate the Vision, press/release any button.
• The unit will enter Diagnostic Mode displaying all segments of the LCD as 8's (Fig. 1), followed by dashes ( - - ), then
a countdown from 9 to 0. It checks the display and voltage to ensure that everything is within tolerance.
• It will also check ambient barometric pressure, and calibrate present depth as 0. When at 3001 feet (916 meters),
or higher, it will adjust depth for the higher altitude.
• After the Diagnostic check, a MY INFO screen will be displayed for 10 sec showing a default message (Fig. 2A), or
information that you enter using the PC interface system (Fig. 2B).
• The NORM Surface Main screen will then be displayed, allowing access to all surface functions.
• If no dive is made within 2 hours, the unit will shut Off. Also see PSM on page 10.
Contacts located on the stems of the buttons and pins of the PC Data Port will automatically activate the unit and cause it
to enter dive mode when the contacts become wet and it senses depth of 5 FT (1.5 M). They will not inadvertently activate
Surface Mode such as when in a wet gear bag.
MENU SYSTEM
The Dot Matrix located in the middle of the LCD viewing area is used to display alpha numeric messages and mea-
sured values as well as Menu type systems for selection of settings and various auxiliary functions. It also serves as the
Digital Compass which can be accessed while viewing Main screens.
There are multiple Menus such as -
• NORM Main Menu
• GAUG Main Menu
• Compass Menu
• Compass Reference Menu
• Set FO2 Menu
• Set Alarms Menu
• Set Utilities Menu
• Set Time Menu
• Set Shortcut Menu
• Set Dive Display Menu
• Set Preview Menu
• Gas Switch Menu
Upon entering a Menu, movement through it starts at the rst (top) selection, then continues in a rolling manner down
the screen showing selections in groups of up to 4 items.

M (< 2 sec) - to access a Main Menu from a Surface Main.
A (< 2 sec) - to step down the screen (forward) through Menu selections.
M (< 2 sec) - to step up the screen (backward) through Menu selections.
S (< 2 sec) - to access the item (such as a Set Menu) indicated by Arrow icon ( > ).
S (2 sec) - to step back to a previous item or from a selected item to the Menu.
S (2 sec) - to step back from a Main Menu to a Surface Main.
M (2 sec) anytime, or no button action for 2 minutes - will revert to Surface Main.
• Right Arrow icon ( > ) at the left indicates that the item can be selected.
• Down Arrow icon ( v ) at the right indicates that additional items are available below (after) those shown.
• Up Arrow icon ( ^ ) at the right indicates that additional items are available above (before) those shown.
This item can
be selected
(accessed).
There are more
items above.
There are more
items below.
M A
S
Fig. 2A - Default Message
(for 10 sec, then SURF Main)
Fig. 2B - Sample Message
(for 10 sec, then SURF Main)
Sample Menu

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AUDIBLE ALARM
While operating in NORM or GAUG Mode the Audible will emit 1 beep per second for 10 seconds when alarms strike, unless it is set Off. During that time, the
Audible can be acknowledged and silenced by pressing the S button (less than 2 seconds).
An LED Warning Light, on the housing, is synchronized with the Audible and ashes as the Audible sounds. It will turn Off when the Alarm is silenced. The Au-
dible and LED will not be active if the Audible is set OFF (a group A setting).
Alarms that strike during operations in Compass Mode are described on page 40.
Situations that will activate the NORM/GAUG 10 second Alarm include -
• Air Time Remaining (ATR) at 5 minutes, then again at 0 minutes. ** Items apply only in NORM mode.
• Turn Pressure at the Set Point selected (Tank 1 only).
• End Pressure at the Set Point selected (Tank 1 only).
• Descent deeper than the Depth Alarm Set Point selected.
• Dive Time Remaining at the Set Point selected**.
• Elapsed Dive Time at the Set Point selected.
• PO2 (for Gas in use) level at .20 < Set Point and again at the Set Point selected**.
• O2 accumulation at 240 OTU (80%), then again at 300 OTU (100%)**.
• TLBG at the Set Point selected**.
• Ascent Rate exceeds 60 FPM (18 MPM) when deeper than 60 FT (18 M), or 30 FPM (9 MPM) at 60 FT (18 M) and shallower.
• Entry into Decompression Mode (Deco)**.
• Conditional Violation (above a required Deco Stop Depth < 5 minutes)**.
• Delayed Violation (above a required Deco Stop Depth => 5 minutes)**.
• Delayed Violation (a Deco Stop Depth > 60 FT/18 M is required)**.
• Delayed Violation (Depth > 330 FT/100 M in NORM, > 400 FT/120 M in GAUG).
• A Gas Switch would expose the diver to PO2 => 1.60 ATA**.
A single short beep (which cannot be disabled) sounds when -
• After 5 minutes on the surface after the Violation dive.
3 short beeps (which cannot be disabled) sound when -
• Ascent Rate is 51 to 60 FPM (15.1 to 18 MPM) when deeper than 60 FT (18 M), or 26 to 30 FPM (7.5 to 9 MPM) at 60 FT (18 M) and shallower.
During the following situations, the audible will not turn off when acknowledged -
• Delayed Violations.
• Deco Stop Depth Violation => 70 FT/21 M stop required.
PC INTERFACE
Interface with a PC, to allow uploading settings and downloading data, is accomplished by connecting the Vision to a PC USB Port using the special USB
Interface Cable.
The software program together with the USB Driver required is on the PCI (PC Inteface) CD, and can be downloaded from the Sherwood Scuba website. The
program's HELP** serves as the user manual which can be printed for personal use.
**Prior to attempting to Download data from your Vision or Upload Settings to it, review the HELP section of the PCI program. Recommended is to print
those sections of HELP that you consider appropriate for your Interface activities.
The Settings Upload portion of the PCI program can be used to set/change the Set A group (Alarms), Set U group (Utilities), Set T (Time), etc. using the
same Interface System. FO2 related items must be set using the control buttons.
Information available for retrieval (download) from the Vision to the PC Download portion of the program includes dive data such as number, surface interval
time, maximum depth, elapsed dive time, no deco status, start/end pressure, start date/time, lowest temperature under water, sampling rate, dive prole, and
Set Points.
The PCI program also allows upgrade of select versions of the Vision's rmware (operating system software) after which the Vision resets all operating data.
Since the upgrades require reset of the Vision, they are blocked during 24 hours after dives.
• Refer to page 44 for more details relating to PC Interface.

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POWER SUPPLY
• Battery >> (1) 3 vdc, CR2450, Lithium.
• Shelf life >> up to 5 years.
• Use life >> 100 dive hours if (1) 1 hour dive per dive day up to 300 dive hours if (3) 1
hour dives per dive day.
• Use life >> 300 dive hours if (2) 1 hour dives per dive day.
• Replacement >> by user (annual recommended).

• Warning >> icon on solid when < 2.75 volts, battery change recommended.
• Alarm >> icon on ashing when < 2.50 volts, change the battery.
LOW BATTERY WHILE ON THE SURFACE
<= 2.75 volts (warning level)
• Backlight is completely disabled.
• Battery icon (shell with inner bar) appears solid (Fig. 3a).
• If a dive is started, the icon is not displayed on the dive mode screens.
• All functions, including Compass Mode, continue to be available.
<=2.50 volts (Too Low - alarm level)
• Battery icon (shell only) will ash for 5 seconds then the unit shuts off completely.
LOW BATTERY DURING A DIVE
<= 2.75 volts (warning level)
• Backlight is completely disabled.
• All other functions continue to be available.
• Battery icon is not displayed on the dive mode screens.
• Battery icon (shell with inner bar) appears solid upon entry into Surface Mode.
<= 2.50 volts (Too Low - alarm level)
• Backlight is completely disabled.
• All other functions continue to be available during the dive.
• Battery icon is not displayed on the dive mode screens.
• Upon surfacing, the Battery icon (shell only) and graphic CHANGE BATTERY ash for 10
minutes (Fig. 4), then the unit shuts Off completely.
Fig. 3 - LOW BATTERY WARNING
a
Fig. 4 - LOW BATTERY
(after surfacing)

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OPERATING MODES
NORM Mode >> for Air and Nitrox SCUBA activity with up to 4 Gases and Pressure from 1 tank (by hose integration).
GAUG Mode >> for SCUBA activity with Pressure from 1 tank (by hose integration).
If no previous dive has been taken within the past 24 hours, NORM is the default mode upon activation with others accessed
as described later.
At any time while operating in Surface Modes, operation will enter the Dive Mode selected upon descent to 5 FT (1.5 M) for
5 seconds.
• When Wet Activation is set Off, Dive Mode will only be activated when the unit is rst activated and operating in a surface mode.
• When Wet Activation is set On, the selected Dive Mode will activate upon descent regardless of whether it is activated and operating rst.

Operation shifts from Dive Mode to Surface Mode upon ascent to 2 FT (0.6 M) for 1 second; however, Surface mode
screens will not be available until a Transition time elapses.
The reason for this is that making a descent during the rst 10 minutes after surfacing from a NORM or GAUG dive is a
continuation of that dive.
A descent made after the 10 minute interval has elapsed is then considered a new dive.
During the rst 10 minutes after surfacing from a NORM or GAUG dive, the Dive Main screen will be displayed with Surface
Interval time replacing Current Depth. Dive ALTs can be accessed to view other information pertaining to that dive.
POWER SAVER MODE (PSM)
Once 10 minutes elapse, after the 10 minute Transition Period on the surface after a dive, the unit will enter a Power Saver
Mode (PSM) which turns the display screen off until a button is pressed at which time it will turn back on.
During the time that the screen is off, all operations continue as normal in the background with current updated information
displayed as soon as the screen comes on again.
Pay special attention to items marked with this Warning symbol.

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NORM
SURFACE MODES

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NORM SURF MAIN, information includes (Fig. 5, 6):
> SI (hr:min) with Time (clock) and SURF icons; if no dive yet, this is time since activation.
> Graphic NORM (operating mode).
> Graphic DIVE and number of dives completed during that operating period, up to 24 (0 if no dive made yet).
> Graphic GAS 1, default on surface before rst dive and 10 minutes after surfacing from dives.
> Tank Pressure with PSI (or BAR) icon, if a tank is in use.
> Graphic AIR, or Nitrox value set for Gas 1 with FO2 icon.
> TLBG with icon, if any nitrogen after NORM dives.
> Nx icon, if FO2 is set for Nitrox.
> Battery icon, if voltage is low.
• A (< 2 sec) to access ALT 1.
• M (< 2 sec) to access NORM Main Menu.
• M (2 sec) to access NORM Shortcut*.
• S (2 sec) to access Compass.
• S (< 2 sec) to activate Backlight.
*Shortcut takes you a screen selected using the Set S (Shortcut) feature, see page 18.
NORM SURF ALT 1, information includes (Fig. 7):
> SI* (hr:min) with Time (clock) and SURF icons.
> Max Depth* with FT (or M) and MAX icons.
> Elapsed Dive Time* (hr:min) with graphic EDT.
> Graphic LAST, indicating that data is from the dive previously conducted while in NORM mode.
*Dashes if no previous dive.
• A (< 2 sec) to access ALT 2.
• 10 sec, revert to Main if A is not pressed.
• S (< 2 sec) to activate Backlight.
NORM SURF ALT 2, information includes (Fig. 8):
> Altitude graphic, if EL2 (to EL7), blank if Sea level.
> Time of Day (hr:min) with graphic A (or P).
> Temperature with ° icon and graphic F (or C).
• A (< 2 sec) to access ALT 3 (if Nx), revert to Main (if Air).
• 5 sec, revert to Main if A is not pressed.
• S (< 2 sec) to activate Backlight.
NORM SURF ALT 3 (only if Nitrox, no screen if Air), information includes (Fig. 9):
> Graphic O2 with Nx icon.
> Current O2 saturation with graphic %O2SAT.
> Graphics SETTINGS and GAS 1 with PO2 and FO2 values currently set with icons.
• A (< 2 sec) to revert to Main, or after 5 sec.
• S (< 2 sec) to activate Backlight.
NORM MENU
• M (< 2 sec) to access Menu, while viewing Surface Main.
• A (< 2 sec) to step forward through selections (down screen).
• A (hold) to scroll forward through selections (down screen) at a rate of 4 per second.
• M (< 2 sec) to step back through selections (up screen).
• S (< 2 sec) to select (access) the item shown next to the pointer icon ( > ).
• S (2 sec) to revert from the Main Menu to Surface Main.
• M (2 sec) any time to revert to Surface Main.
• 2 min (no button action) will revert to Surface Main.

• Pointer icon ( > ) at the left indicates that the item can be selected.
• Down Arrow icon ( v ) at the right indicates that additional items are available below (after) those shown.
• Up Arrow icon ( ^ ) at the right indicates that additional items are available above (before) those shown.
Fig. 5 - NORM SURF MAIN
(no dive yet, set for Air)
Fig. 6 - NORM SURF MAIN
(after Nitrox dive 2)
Fig. 7 NORM SURF ALT 1
Fig. 8 - NORM SURF ALT 2
Fig. 9 - NORM SURF ALT 3
NORM
MENU
SELECT
>FLY/DESAT
PLAN
LOG
SET.MENU
OP.MODE
HISTORY
ID.-.SN
DIVE.PREVIEW

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FLY/DESAT
FLY Time is a count down timer that begins counting down 10 minutes after surfacing from a dive from 23:50 to 0:00 (hr:min).
DESAT Time, also a count down timer, provides calculated time for tissue desaturation at sea level taking into consideration the
Algorithm used and the Conservation Factor setting.
DESAT Time also begins counting down 10 minutes after surfacing from a NORM dive, counting down from 23:50 (max, usually
much less) to 0:00 (hr:min).
When the DESAT time reaches 0:00, which will generally occur prior to the FLY count down reaching 0:00, it will remain on the
display until the FLY count down reaches 0:00.
> DESAT is not displayed after a Gauge or Violation dive.
> Desaturation requiring Times greater than 24 hours will display 23: - - .
> In the event that Time to Desaturate still remains at the end of 24 hours, the added time will be zeroed.
> When other screens are accessed, the FLY and DESAT countdowns continue in the background.
, information includes (Fig. 10):
> Graphics FLY and DSAT with countdown times (hr:min) and Time (clock) icon, dashes if no dive yet.
• S (< 2 sec) to revert to Main Menu.
NORM PLAN MODE
No Deco time Limits (NDLs) and O2 time Limits (OTLs) in Plan Mode are based on the Algorithm, the FO2 set for Gas 1, and
residual nitrogen (or O2) remaining from previous NORM dives. FO2 set for other Gases are not used for Plan calculations.

Plan screens will sequence through Depths from 30 to 190 FT (9 to 57 M), or the Max Depth that will allow theoretical No
Deco Dive Time of at least 1 minute based upon the previous dive proles in a series of repetitive dives and taking into ac-
count descent and ascent rates of 60 FPM (18 MPM).
When the Conservative Factor is set On, NDLs are reduced to the values of the next 3,000 foot (915 meter) higher Altitude.
Refer to tables in back.
PDPS, information includes (Fig. 11 A - C):
> Plan Depth value with FT (or M) icon.
> Nx icon, if it applies.
> Max Depth allowed with FT (or M) and MAX, if Nx.
> Graphic NDC (or OTL) with Dive Time allowed (min).
> Graphic GAS 1 with FO2 icon.
> Graphic AIR; or PO2 alarm value set with icon and FO2 Nitrox value set, if Nx.
• A (hold) to scroll forward through screens at a rate of 4 per second increasing planned Depth from 30 to 190 FT (9 to 57
M) in increments of 10 FT (3 M).
• A (< 2 sec) to step forward through screens.
• M (< 2 sec) to step back through screens.
• S (< 2 sec) to exit and revert to the Main Menu.
LOG MODE
Information from the latest 24 NORM and/or GAUG dives is stored for viewing. After exceeding 24 dives, the most recent
dive is stored while the oldest is deleted.
> Dives are numbered from 1 to 24 starting each time NORM (or GAUG) Dive Mode is activated. After 24 hours elapse
with no dive, the rst dive of the next period of operation is #1.
> 10 minutes after a dive, the Log screens for all dives stored can be viewed.
If a dive’s elapsed time (EDT) exceeds 599 (min), data at the 599 interval is recorded in the Log upon surfacing of the unit.
Main Menu >> Log Menu >> Dive >> Data 1 >> Data 2 >> Data 3.
, information includes (Fig. 12):
> Graphics LOG and MENU with mode (book) icon.
> Listing* of dives displaying - - Number (1 to 24), Date, and start Time; or graphics NO DIVES YET if a new unit.
*Up and Down arrows are not displayed at the right due to space limitations.
• A (hold) to scroll forward (down) through the listing at a rate of 8 entries per second.
• A (< 2 sec) to step forward (down) through the listing.
• M (< 2 sec) to step back (up) through the listing.
• S (< 2 sec) to access that dive's Log Data 1 screen.
• S (2 sec) to revert to Main Menu.
Fig. 10 - FLY/DESAT
Fig. 11A - PDPS
(Gas 1 set for Air)
Fig. 11B - PDPS
(Gas 1 set for Nitrox)
Fig. 11C - PDPS
(times controlled by O2)
NORM.MAIN
MENU
SELECT
>
FLY/DESAT
PLAN
LOG
SET.MENU
OP.MODE
HISTORY
ID.-.SN
DIVE.PREVIEW
Press S (< 2 sec) to
access Log Menu.
Fig. 12 - LOG MENU

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, information includes (Fig. 13):
> Log (book) icon and Nx icons if they apply.
> Pre dive Surface Interval (hr:min) with Time (clock) and SURF icons, - : - - if # 1 (no previous dive that period).
> Max Depth with graphics FT (or M) and MAX.
> Elapsed Dive Time (min) with graphic EDT.
> Graphic NORM, GAUG, or VIOL with dive Number.
> TLBG with max segment ashing, others xed up to end of dive accumulation. All ash if Violation. Blank if GAUG.
> VARI, max Ascent Rate sustained for 4 sec.
• S (< 2 sec) to access that dive's Log Data 2 screen.
• S (2 sec), at any time, to revert to Log Menu.
, information includes (Fig. 14):
> Log (book) icon.
> Graphic SEA (or EL2 - EL7), altitude level of dive.
> Graphics xxx PSI (or BAR) START, and xxx PSI (or BAR) END, indicating Tank 1 pressures.
> Temperature with ° icon and graphic F (or C), minimum recorded during that dive.
• S (< 2 sec) to access that dive's Log Data 3 screen if Nx, or revert to Log Menu if Air or GAUG.
• S (2 sec), at any time, to revert to Log Menu.
 (Nx only), information includes (Fig. 15):
> Log (book) and Nx icons with graphic O2.
> O2 accumulated at end of dive with graphic %O2SAT.
> Max level of PO2 achieved with icon.
> Graphic GAS 1 (or 2 or 3), one in use when dive ended.
> FO2 value set for Gas in use when dive ended, with icon.
• S (< 2 sec) to revert to Log Menu.
• S (2 sec), at any time, to revert to Log Menu.
SET MENU
The Set Menu selection provides access to a listing of sub menus that contain items specic to NORM and GAUG modes as well
as some utility items that also apply to FREE mode.
• S (< 2 sec) to access the Set Menu while the pointer icon ( > ) is next to that item on the Main Menu.
, information includes (Fig. 16A/B):
> Graphics SEt and MENU with selections -
> F - FO2 (NORM only).
> A - ALARMS.
> U - UTILITIES.
> T - TIME.
> S - SHORTCUT.
> D - DIVE MAIN.
> P - PREVIEW.
These Set Groups are described after the Main Menu items (starting on page 15).
• A (< 2 sec) to step forward (down) through Menu selections.
• M (< 2 sec) to step back (up) through Menu selections.
• S (< 2 sec) to access the item next to the pointer ( > ).
• S (2 sec) to revert to Main Menu.
SELECT OP (OPERATING) MODE
This feature allows the other Operating Mode (GAUG or NORM) to be selected.
, information includes (Fig. 17):
> Graphics SEL and DIVE MODE.
> Graphic NORM, ashing.
> Graphic GAUG.
• A or M (< 2 sec) to toggle between selections.
• S (< 2 sec) to select that Mode and revert to it's SURF Main screen.
• S (2 sec) to revert to Main Menu.
Fig. 13 - LOG DATA 1
Fig. 14 - LOG DATA 2
Fig. 15 - LOG DATA 3
Fig. 16A - SET MENU
MAIN.MENU
>
FLY/DESAT
PLAN
LOG
SET.MENU
OP.MODE
HISTORY
ID.-.SN
DIVE.PREVIEW
Press S (< 2 sec)
to access.
Fig. 16B - SET MENU
Fig. 17 - SELECT OP MODE

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HISTORY MODE
History is a summary of data recorded during all NORM and GAUG dives conducted.
, information includes (Fig. 18):
> Graphic TOTAL, or NO DIVES YET (if new unit).
> Total dives recorded (up to 9999) with graphic DIVES.
> Total dive hours recorded (up to 9999) with graphic HOURS.
> Graphic HIST.
• S (< 2 sec) to access History 2.
• S (2 sec) to revert to Main Menu.
, information includes (Fig. 19):
> Graphic SEA (or EL2 to EL7), highest Altitude at which a dive was conducted.
> Max Depth recorded with FT (or M) and MAX icons.
> Longest dive time (minutes) recorded during a single dive (up to 599 min) with graphic EDT.
> Lowest Temperature recorded during a dive with icon and graphic F (or C).
• S (< 2 sec) to revert to Main Menu.
• S (2 sec) to revert to History 1.
ID - SN
This information should be recorded and kept, it will be required in the event that your unit requires factory service.
ID (Identication), information includes (Fig. 20):
> Graphic ID.
> Graphic SN with the factory programmed serial number.
> Graphic FIRMWARE with 1A (or higher)*, indicating the Firmware revision level currently installed in the unit.
> Graphic LCD with 01 (or higher), indicating the Display's revision number.
*This number will change if Firmware is updated by factory service or by future download of revised rmware from the Sherw web site.
• S (< 2 sec) to revert to Main Menu.
NORM DIVE PREVIEW
This feature provides quick access to a screen that displays up to 4 settings that can be pre selected* using the Set P Menu.
Preview, information includes (Fig. 21):
> Graphics Nor and PREV.
> Selections* with Set Points entered using that menu.
*If no selections have been made yet, the graphics USE SET P TO SELECT ENTRIES will be displayed.
• S (< 2 sec) to revert to Main Menu.
SET GROUPS
Information that follows describes the selections contained in the NORM Set Groups (F, A, U, T, S, D, P) that are accessed from
the Set Menu (page 14).
Main Menu >> Set Menu >> Set Group Menu >> Set Selection.
SET F (FO2)
Each Gas has an individual FO2 setting with an associated PO2 Alarm setting.
Default settings are FO2 Air with no PO2 value for Gas 1, and Off for Gas 2, 3, 4. Settings revert to the defaults when 24
hours elapse without conducting a dive.
When FO2 is set for Air -
> calculations are the same as when FO2 is set for 21%.
> it remains set for Air until set for Nitrox (21 to 100%).
> O2 data (such as PO2, O2%) will not be displayed at any time during the dive, on the surface, or in Plan mode.
> MODs (Max Operating Depths) will not be displayed on the FO2 set screen.
> internally, it will keep track of O2 data for use if FO2 is subsequently set for Nitrox for repetitive dives.
When FO2 is set for Nitrox -
> The Air option will not be displayed as an FO2 setting until 24 hours elapse after the last dive.
When FO2 is set for OFF (Gas 2, 3, 4) -
> That Gas will not be available in the Gas Switch routine during dives (no Switch To - screen).
Fig. 18 - HISTORY 1
Fig. 19 - HISTORY 2
Fig. 20 - A300 AI ID
MAIN.MENU
>
FLY/DESAT
PLAN
LOG
SET.MENU
OP.MODE
HISTORY
ID.-.SN
DIVE.PREVIEW
Press S (< 2 sec)
to access.
Fig. 21 - PREVIEW
(selected settings)

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FO2 50% Default -
> When the Default is set OFF, FO2 values will remain set at their last settings saved until 24 hours elapse without conduct-
ing a dive.
> When the Default is set ON and FO2 is set for Nitrox, 10 minutes on the surface after that dive the FO2 will be dis-
played as 50 and further dives will be calculated based on 50% O2 for oxygen calculations and 21% O2 for Nitrogen
calculations (79% Nitrogen), unless FO2 is set before the dive.
> FO2 will continue to reset to the Default after repetitive dives until 24 hours elapse with no dive, or the Default is set OFF.
SET F (FO2) MENU, information includes (Fig. 22):
> Graphics SEt and MENU, with the following graphic selections with their last Set Points saved.
> GAS1 AIR Set Points of AIR, 21 to 100%, increments of 1%.
> GAS2 32% Set Points of OFF, AIR, 21 to 100%, increments of 1%.
> GAS3 80% Set Points of OFF, AIR, 21 to 100%, increments of 1%.
> GAS4 OFF Set Points of OFF, AIR, 21 to 100%, increments of 1%.
> DEFAULT ON Set Points of OFF, ON.
When Gas 2 is OFF, Gas 3 & 4 remain OFF, and when Gas 3 is OFF Gas 4 will remain OFF. This blocks access to the Gas
Switch screens for gasses not selected for use.
During the time that numeric FO2 values (21 to 100) are ashing, the MOD (Max Operating Depth) allowed for the PO2
alarm set will be displayed in place of the graphic SEt, and the PO2 alarm value set will be displayed in place of the
graphic MENU.
• S (< 2 sec) - to access Set F Menu while the selection Arrow icon ( > ) is next to Set F on the NORM Menu.
• A (< 2 sec) - to step down (forward) through selections.
• M (< 2 sec) - to step up (back) through selections.
• S (< 2 sec) - to access selection indicated by Arrow icon ( > ). This causes the FO2 setting to ash allowing it to be set.
• S (2 sec) - to step back from Set F Menu to SET Menu.

• A (press/hold), while the FO2 digits are ashing (Fig. 23A) - to scroll upward through the Set Points from Air to 21 through
100 in 1% increments, at a rate of 8 per second.
The scroll will stop when the button is released, or momentarily at 32, then 50, then 80 (%).
• A (< 2 sec) - to step upward through FO2 Set Points one at a time.
• M (< 2 sec) - to step back through FO2 Set Points one at a time.
• S (< 2 sec) - save the FO2 setting, and ash the PO2 digits if Nitrox (Fig. 23B), or revert to SURF MAIN if Air.
• A (< 2 sec) - to step upward through PO2 Alarm Set Points from 1.00 to 1.60 (ATA) in .05 increments.
• M (< 2 sec) - to step back through PO2 Set Points.
• S (< 2 sec) - to save the PO2 setting and access Set Gas 2.
• S (2 sec) - to revert to Set F Menu displaying the settings.
• M (2 sec) or if no button is pressed during a 2 minute period - to revert to SURF MAIN.
Once any Gas is set for Nitrox, any other Gas set for Air will automacally be set to 21%.
SET FO2 50% DEFAULT, information includes (Fig. 23C):
> Graphics DEFAULT and 50.
> Set Point graphic OFF (or ON), ashing.
> Nx icon.
• A or M (< 2 sec) - to toggle between OFF and ON.
• S (< 2 sec) - to save the setting and revert to Set F.
SET A (ALARMS) MENU, information includes (Fig. 24A/B):
> Graphics SEt A and MENU, with the following graphic selections with their last Set Points saved.
> AUD ON Set Points of OFF, ON >> Audible.
> DEPTH 140 FT Set Points of OFF, 30 to 330 FT (or 10 to 100 M), increments of 10 FT (3 M).
> EDT 60 MIN Set Points of OFF, 10 to 180 MIN, increments of 5 MIN >> Elapsed Dive Time.
> TLBG* 4 BAR Set Points of 1 to 4 BAR, increments of 1 BAR >> Tissue Loading Bar Graph.
> DTR* 5 MIN Set Points of OFF, 1 to 20 MIN, increments of 1 MIN >> Dive Time Remaining.
> TURN 1400 PSI Set Points of OFF, 1000 to 3000 PSI (or 70 to 205 BAR), increments of 250 PSI (5 BAR).
> END 500 PSI Set Points of 300 to 1500 PSI (or 20 to 105 BAR), increments of 100 PSI (5 BAR).
*These items apply to NORM only.
• A (< 2 sec) to toggle or increase Set Point.
• A (hold) to increase Set Point at a rate of 8 per second.
• M (< 2 sec) to decrease Set Point.
• S (< 2 sec) to save the setting and revert to the Set A Menu.
• S (2 sec) - to step back from Set A Menu to SET Menu.
Fig. 22 - SET F MENU
(stepping through)
Fig. 23A - SET FO2
(changing the setting)
Fig. 23B - SET PO2
(after FO2 setting is saved)
Fig. 23C - SET FO2 50%
DEFAULT
Fig. 24A - SET A MENU (step-
ping through)
Fig. 24B - SET END ALARM
(sample of changing a setting)

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SET U (UTILITIES) MENU, information includes (Fig. 25A - C):
> Graphics SEt U and MENU, with the following graphic selections with their last Set Points saved.
> WET ACT ON Set Points of OFF, ON >> activation of dive mode when wet.
> UNITS IMP Set Points of IMP (Imperial), MET (Metric) >> Units of Measure.
> DEEP* OFF Set Points of OFF, ON >> No Deco Deep Stop.
> SAFE* OFF Set Points of OFF, TMR (Timer), ON >> no deco safety stop.
> CONSER* OFF Set Points of OFF, ON >> Conservative Factor, reduces NDLs based on altitude.
> GLO DUR 15 SEC Set Points of 5, 10, or 15 SEC >> time Backlight remains on.
> SAMPLE 60 SEC Set Points of 2, 15, 30, or 60 SEC >> rate data is recorded for PC download.
*These items apply to NORM only.
Additional information relating to the effects of the items included are described in associated sections throughout this manual.
• A (< 2 sec) to step forward (down) through selections.
• M (< 2 sec) to step back (up) through selections.
• S (< 2 sec) when the pointer icon is next to a selection will ash that item's Set Point.
• S (2 sec) - to step back from Set U Menu to SET Menu.
• A (< 2 sec) to toggle or increase Set Point.
• M (< 2 sec) to decrease Set Point.
• S (< 2 sec) to save the setting and revert to Set U Menu.
SET SAFETY STOP, information includes (Fig. 26):
The Set U Menu will display the graphic OFF, ON, or TMR solid.
• S (< 2 sec) will ash (Fig. 26A) the setting graphic allowing step through of the others with the addition of the SET selec-
tion (Fig. 26B). OFF >> TMR >> SET >> ON.
• S (< 2 sec) while OFF or TMR are ashing will save the setting and revert to the Set U Menu.
• S (< 2 sec) while SET is ashing will display the Stop Depth and Time with the Depth setting ashing (Fig. 26C).
• A (< 2 sec) to step forward through Depth settings of 10, 15, 20 FT (or 3, 4, 5, 6 M).
• M (< 2 sec) to step back through Depth settings.
• S (< 2 sec) to save Depth setting and ash Time digits.
• A or M (< 2 sec) to toggle Time between 3 and 5 min.
• S (< 2 sec) to save Depth/Time setting and revert to the Set U Menu with SET ashing.
• A (< 2 sec) to select ON, then S (< 2 sec) to ash ON, then save ON.
SET T (TIME/DATE) MENU, information includes (Fig. 27):
> Graphics SEt t and MENU with Time (clock) icon, and the following graphic selections with their last Set Points saved.
> DATE FORM M.D Set Points of M.D (Month.Day), D.M (Day.Month).
> HOUR FORM 12 or 24 Set Points of 12 (12: A to 11: P), 24 (0: to 23:).
> TIME 10:45 A Set Points of 12:01 A to 11:59 P, if 12 Hr Format (or 0:01 to 23:59, if 24 Hr Format).
> DATE 4.20.11 Set Points >> arranged as M.D.Y (or D.M.Y) by Date Format set.
• A (< 2 sec) to step forward (down) through selections.
• M (< 2 sec) to step back (up) through selections.
• S (< 2 sec) when the pointer icon ( > ) is next a selection will ash that item’s Set Point.
• S (2 sec) - to step back from Set T Menu to SET Menu.
• A (< 2 sec) to increase Set Points one at a time.
• A (hold) to increase Set Points at a rate of 8 per second.
• M (< 2 sec) to decrease Set Points one at a time.
• S (< 2 sec) to save the setting which becomes solid, then the next value ashes.
> The left digits of the Time and Date selections will ash rst allowing them to be changed after which the next digits (to
the right) ash allowing them to be changed.
> TIME (hr:min) >> Hour digits ash, then Minutes.
> DATE (m.d.y or d.m.y) >> Year digits ash, then Month, then Day, regardless of their position.
Fig. 25A - SET U MENU
(stepping through)
Fig. 25B - SET SAMPLING
(sample of changing a setting)
Fig. 26A - SET SAFETY STOP
Fig. 26B - SET SS
(to access Set Depth/Time)
Fig. 26C - SET SS
(Depth, Time)
Fig. 27 - SET T MENU
(stepping through)

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SET S (SHORTCUT) MENU, information includes (Fig. 28):
> Graphics SEt S and MENU, and the following graphic selections.
One item can be selected from the following menu list. That item (referred to as a Shortcut) can then be accessed directly by
pressing M (2 sec) while viewing the Surface Main.
> SET F MENU.
> LOG MENU.
> MY INFO (default Shortcut until another item is selected).
> SET HEADING (Compass).
> SET TIME.
• A (< 2 sec) to step forward (down) through selections.
• M (< 2 sec) to step back (up) through selections.
• S (< 2 sec) when the pointer icon ( > ) is next a selection will save it as the Shortcut and revert to the Set Menu.
• S (2 sec) - to step back from Set S Menu to SET Menu.
SET D (DIVE MAIN) MENU, information includes (Fig. 29):
> Graphics SEt D and MENU.
The default screen for No Deco dives (except while at Stops) displays Current Depth, NDC time, Pressure (Tank 1), and ATR
(Tank 1 air time remaining). Items such as Max Depth and EDT (elapsed dive time) are displayed on Alternate screens. Set
D allows certain items to be added to the Main (moving them from the Alternates).
One item can be selected from the following menu list.
> USE DEFAULT >> no change to the display, largest NDC digits.
> ADD EDT >> and reduces the size of NDC digits.
> ADD MAX D >> and reduces the size of NDC digits.
> ADD EDT + MAX D >> and reduces the size of NDC digits.
> ADD O2 DATA >> reduces the size of NDC digits and replaces Pressure (which moves to an Alternate) with PO2.
• A (< 2 sec) to step forward (down) through selections.
• M (< 2 sec) to step back (up) through selections.
• S (< 2 sec) when the pointer icon ( > ) is next a selection will save it as the Dive Main* and revert to the Set Menu.
• S (2 sec) - to step back from Set D Menu to SET Menu.
*Ensure that the selection to be saved reects information you want to see on the Dive Main, it cannot be changed during the dive (only while on
the surface using this menu). Refer to Dive Mode for sample screens.
SET P (PREVIEW) MENU, information includes (Fig. 30):
> Graphics SEt P and MENU.
Using this menu, you can chose up to 4 items (Set Points that have been entered) for display on a Preview screen that can be
accessed from the Surface Main Menu (see page 15).
Up to 4 items can be selected from the following menu list.
> GAS 1 FO2 SET.
> GAS 1 PO2 AL SET.
> DEPTH AL SET.
> EDT AL SET.
> TURN AL SET (Tank 1).
> END AL SET (Tank 1).
> DEEP STOP SET.
> SAFETY STOP SET.
> GLO DUR SET (Backlight).
> ALGO SET (Algorithm).
• A (< 2 sec) to step forward (down) through selections.
• M (< 2 sec) to step back (up) through selections.
• S (< 2 sec) when the pointer icon ( > ) is next a selection will toggle* it between solid and ashing.
• S (2 sec) - to step back from Set P Menu to SET Menu.
*Once 4 items are ashing, another item cannot be toggled to ash until one of the ashing items is toggled to solid.
When satised that those items ashing (up to 4) are what you want for the Preview screen >>
• press S (2 sec) to display all items ashing (Fig. 31),
• then press S (2 sec) again to revert to the SET Menu,
• then press S (< 2 sec) again to revert to the SURF Menu.
Fig. 28 - SET S MENU
(stepping through)
Fig. 29 - SET D MENU
(stepping through)
Fig. 30 - SET P MENU
(stepping through)
Fig. 31 - SET P MENU
(preview of selections)

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DIVE MODE
FEATURES

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WET ACTIVATION
The Vision is congured with contacts that will automatically activate Dive Mode when the space between the contacts is
bridged by a conductive material (immersed in water) and it senses a Depth of 5 FT (1.5 M).
The contacts are the metal pins of the PC Interface Data Port and the stems of the buttons.
When Wet Activation is set OFF, the Vision will not enter Dive Mode unless it is rst activated by push button and operating in
a surface mode or it is a repetitive dive.
BACKLIGHT
To activate the Backlight >> press/release the S button (< 2 sec).
• If ambient light level is low, the Backlight will activate and illuminate the display for the Duration time set (5, 10, or 15
seconds).
• Pressing any button while the Backlight is on will reset the timer, keeping it on for the duration time set.
Extensive use of the Backlight reduces estimated Battery life. Also, the Backlight does not operate
during a Low Battery Condition or when the Vision is connected to a PC.
BAR GRAPHS
The Vision features 2 bar graphs, one on each side of the LCD.
> The one on the left represents nitrogen loading. It is referred to as the TLBG (Tissue Loading Bar Graph).
> The one on the right represents ascent rate. It is referred to as the VARI (Variable Ascent Rate Indicator).
TLBG
The TLBG (Fig. 32a) represents your relative No Deco or Deco status. The lower 4 segments represent No Deco status and the
fth at the top indicates a Deco condition. As your Depth and Elapsed Dive Time increase segments add, and as you ascend
segments recede indicating that additional no deco time is available.
The Vision monitors 12 different nitrogen compartments simultaneously and the TLBG displays the one that is in control of your
dive at any given time.
VARI
The VARI (Fig. 32b) provides a visual representation of ascent speed (i.e., an ascent speedometer).
The segments represent two sets of speeds which change at a reference depth of 60 FT (18 M). Refer to the chart.
When ascent is too fast, all segments of the VARI and the graphics TOO FAST will be displayed ashing (Fig. 33) until ascent is
slowed.
WARNING: At depths greater than 60 FT (18 M), ascent rates should not exceed 60 FPM (18
MPM). At depths of 60 FT (18 M) and shallower, ascent rates should not exceed 30 FPM (9
MPM).
CONSERVATIVE FACTOR (CF)
When the CF is set On, the NDLs which are based on the algorithm selected and used for Ni/O2 calculations and displays
relating to Plan and DTR, will be reduced to the values available at the altitude level that is 3,000 feet (915 meters) higher.
Refer to the NDL charts in the back of this manual.
Fig. 32 - BAR GRAPHS
a b
Fig. 33 - ASCENT TOO FAST
VARI Ascent Rate
Deeper.than.60.FT.(18.M)
Segments FPM MPM
0 0 - 20 0 - 6
1 21 - 30 6.1 - 9
2 31 - 40 9.1 - 12
3 41 - 50 12.1 - 15
4 51 - 60 15.1 - 18
5 60 + 18 +
VARI Ascent Rate
60.FT.(18.M).&.Shallower
Segments FPM MPM
0 0 - 10 0 - 3
1 11 - 15 3.1 - 4.5
2 16 - 20 4.6 - 6
3 21 - 25 6.1 - 7.5
4 26 - 30 7.6 - 9
5 30 + 9 +