Sherwood Scuba Profile User manual

3
Profile
FULLLCDDISPLAY
KEY:
1. Control button
2. N2/O2BarGraph(shareduse)
3. ASC(Ascent Rate) Bar Graph
4. LowBatterysymbol
5. Descend (Down Arrow) symbol
6. Ascend (Up Arrow) symbol
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4
56
1

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The following icons are used throughout this manual to bring your attention to situations that require special consideration.
WARNING- used if serious injury or death could result if the procedure is not followed carefully.
CAUTION - used if a maintenance technique could result in damage to parts if that technique is not followed carefully.
NOTE- used to emphasize important informationormaintenancetechnique.
N
RESPONSIBLECOMPUTERDIVING
Before you dive using your Profile, keep these basic rules in mind:
• Plan each dive, and dive your plan - Your Profile was not designed to make decisions for you, only to provide you with the in-
formation 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 consecutive dive is shallower
than the one before. This will allow your body's slower tissues to continue outgassing nitrogen.
• Make the deepest part of your dive first, and gradually work your way to the surface using a staircase profile - The ability to per-
form 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 toward the surface - Watch the Ascent Rate
Indicator closely while you ascend, and keep it in the green zone as much as possible.
• A Safety Stop of 3 minutes or more is recognized as a prudent action to reduce the probability of bubble formation in divers.

5
Profile
LIMITEDTWO-YEARWARRANTY
Sherwood Scuba guarantees, to the original purchaser only, that the Profile 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 Profile 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 filled 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 ap-
plies 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 Profile to an Authorized Sherwood Scuba Dealer within 30 days of the original purchase date
anniversary to keep the two year limited warranty in force. Annual inspection includes verification 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 Profile. Modifications or repair by anyone other than a Sherwood Scuba Sales and Service
Center authorized to service the Profile 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 Profile 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 ad-
vised 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 limita-
tion may not apply to you.
Warranty does not extend to plastic gauge face, o-rings, batteries, or damage due to accident, abuse, modification, or tampering.

6
COPYRIGHTNOTICE
This owner’s manual is copyrighted, all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or re-
duced to any electronic medium or machine readable form without prior consent in writing from Sherwood Scuba / 2002 Design.
Profile Dive Computer Manual, Doc. No. 12-2972
©2002 Design, 2009
TRADEMARKNOTICE
Sherwood Scuba, Sherwood, and the Sherwood Scuba logo are registered trademarks of Sherwood Scuba, Profile and Hydroglow are also trademarks of
Sherwood Scuba. All rights are reserved.
PATENTNOTICE
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), Dive Time Remaining (U.S. Patent no. 4,586,136), and Ascent Rate Indicator
(U.S. Patent no. 5,156,055).
DECOMPRESSIONMODEL
The programs within the Profile 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 Profile dive computer model is based upon the latest research and experiments in
decompression theory. Still, using the Profile, 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.

7
Profile
CONTENTS
FEATURES and DISPLAYS ......................................................................................................................... 11
Control Button ...............................................................................................................................................13
Bar Graphs ...................................................................................................................................................13
N2/O2 Bar Graph......................................................................................................................................13
Ascent Rate Indicator............................................................................................................................... 14
Informational Displays .................................................................................................................................. 15
Depth Displays .........................................................................................................................................15
Time Displays ........................................................................................................................................... 15
Temperature Display.................................................................................................................................15
Backlight ....................................................................................................................................................... 16
Power Supply ...............................................................................................................................................17
Operating Temperature.................................................................................................................................17
ACTIVATION and SETUP ...........................................................................................................................19
Push Button Activation .................................................................................................................................20
Water Contact Activation .............................................................................................................................21
Surface Sequence .......................................................................................................................................22
Surface Mode ...............................................................................................................................................22
Set Mode....................................................................................................................................................... 23
Set PO2 Alarm ..........................................................................................................................................23
Set FO2.....................................................................................................................................................24
Set FO2 50% Default................................................................................................................................25
Set Wet Activation ....................................................................................................................................25
Set Units of Measure................................................................................................................................26
Set Hour Format .......................................................................................................................................26
Set Time .................................................................................................................................................... 27
Set Deep Stop........................................................................................................................................... 27
Responsible

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CONTENTS(CONTINUED)
PRE DIVE and DIVE MODES .......................................................................................................................29
Button Use .................................................................................................................................................... 30
FO2 ...............................................................................................................................................................30
Use with Air .............................................................................................................................................. 30
Use with Nitrox.........................................................................................................................................31
FO2 50% Default ......................................................................................................................................31
PreDive Plan Mode ....................................................................................................................................... 32
No Deco Dive Mode ......................................................................................................................................33
No Deco Deep Stop .................................................................................................................................. 34
No Deco Safety Stop ................................................................................................................................36
POST DIVE MODES ..................................................................................................................................... 37
Post Dive Surface Mode ..............................................................................................................................38
Transition Period ........................................................................................................................................... 38
After the Transition Period (the First 2 Hours) ............................................................................................39
Time to Fly and Desat Time ...................................................................................................................... 39
Post Dive Plan Mode .................................................................................................................................40
Log Mode ..................................................................................................................................................40
After the First 2 Hours .................................................................................................................................42
SPECIALSITUATIONS ................................................................................................................................43
Clear (Reset) ................................................................................................................................................44
HighPO2 ....................................................................................................................................................... 45
HighO2 .........................................................................................................................................................46
Decompression ............................................................................................................................................47
ConditionalViolation ..................................................................................................................................... 48
Delayed Violation 1, 2, 3 ..............................................................................................................................49
Violation Gauge Mode .................................................................................................................................. 50
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9
Profile
CONTENTS(CONTINUED)
CARE, INSPECTION, and SERVICE ...........................................................................................................53
Care and Cleaning ........................................................................................................................................ 54
Annual Inspections and Service ..................................................................................................................55
Battery Life ...................................................................................................................................................56
Low Battery Condition.................................................................................................................................. 56
Battery Replacement Procedures................................................................................................................ 57
REFERENCE ..................................................................................................................................................63
DiveTimeRemaining..................................................................................................................................... 64
Altitude.......................................................................................................................................................... 65
Flying After Diving ........................................................................................................................................ 66
Nitrox Diving..................................................................................................................................................67
NOAALimits..................................................................................................................................................67
Multiple Tissue Tracking ............................................................................................................................... 68
Repetitive Decompression Diving.................................................................................................................68
No Decompression Limits ............................................................................................................................. 69
Specifications ...............................................................................................................................................72
Glossary ....................................................................................................................................................... 75
Inspection / Service Record......................................................................................................................... 78
Responsible

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WARNINGS:
• The Profile is intended for use by recreational divers who have successfully completed a nationally rec-
ognizedcourseinscubadiving.
• Itis intendedonly fornodecompression diving,NOTintentional decompressiondiving.
• It must not be used by untrained persons who may not have knowledge of the potential risks and haz-
ardsofscubadiving.
• You must obtain scuba certification before using the Profile 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 seri-
ousinjury 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 Profile.
• 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 Sherwood Scuba dealer before you utilize this product.
• Never participate in sharing or swapping of a dive computer. Doing so may result in injury or death. The
Profile provides information based upon a diver’s personal dive profile, and therefore must not be
“shared” between divers. You should never, under any circumstances, swap your computer with an-
other unit between dives, or share your computer with another diver underwater.

11
Profile
FEATURESandDISPLAYS

12
INTRODUCTION
CongratulationsonyourrecentpurchaseoftheSherwoodProfiledivecomputer!
Your new Profile uses a unique and intuitive display that represents the information you need before, during, and after the dive,
laid out in a logical format based on a dive profile diagram. Information is located where you would expect it to be.
In addition to no-decompression/decompression status, tissue loading of nitrogen, accumulation of oxygen, and ascent rate are
presented as peripheral bar graphs alongside reference indicators.
As you progress through this instruction manual, you will become familiar with the unique functions and features available. A
symbol legend is provided on the last page of this section for your convenience.
The Profile's wide array of features are described in detail throughout the pages that follow.
The initial time that you invest becoming acquainted with the symbols and various operating modes and displays will be re-
turned as you enjoy your underwater activities with the comfort that your familiarization affords.
As you use the Profile, remember that the rules you learned in your SCUBA course(s) still apply to the diving you will do while
using a dive computer - some will become even more important. Technology is no substitute for common sense, and a dive com-
puter only provides the person using it with data, not the knowledge to use it.

13
Profile
CONTROLBUTTON
The Profile's Control Button allows you to activate the unit and access specific information when
you choose to see it.
While on the surface, you can use the button to view Dive Logs and enter Settings
During the Dive modes, the button may be used to activate the display's Backlight and view Alter-
nate displays of information
The Profile uses easy to understand alpha/numeric displays and graphic icons (Fig. 1). It is impera-
tive that you understand the formats, ranges, and values of the information presented by the nu-
meric and graphic displays to avoid any possible misunderstanding that could result in an error.
BARGRAPHS
N2/O2 (Nitrogen/Oxygen) Bar Graph
The Profile features a shared Bar Graph that represents either Nitrogen loading identified by the N2
icon (Fig. 1a), or when accessed, Oxygen accumulation identified by the O2 icon (Fig. 1b). By de-
fault, the Bar Graph is referred to as the Nitrogen Bar Graph (N2BG), and represents your relative no
decompression or decompression status.
As your Depth and Dive Time increase, segments will add to the N2BG, and as you ascend to shal-
lower depths, the segments will begin to recede, indicating that additional no deco time is allowed. Fig. 1 - Icons and BGs
b
a

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The N2BG monitors 12 different nitrogen compartments simultaneously and displays the one that is
in control of your dive. It consists of 5 segments, the lower 4 represent No Decompression status
and the fifth at the top indicates a Decompression condition.
When the Profile is set to operate in Nitrox mode, the Bar Graph will represent Oxygen accumula-
tion when the O2 data screen (Alternate Display) is accessed.
Regardless of which parameter the Bar Graph is representing at the time, nitrogen and oxygen cal-
culations will continue to be performed in the background.
Ascent Rate Bar Graph (ASC)
The ASC (Fig. 2a) provides a visual representation of Ascent speed (i.e., an ascent speedometer),
'normal' rate, a 'cautionary' rate, and 'Too Fast'. The segments of the ASC represent 2 sets of
speeds which change at a reference depth of 60 FT (18 M). Refer to the chart at the left for segment
values.
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).
Fig. 2 - ASC
a
ASC
Deeper than 60 FT (18 M)
Segments Ascent Rate =
Displayed FPM MPM
00-200-6
1 21-30 6.5-9
2 31-40 9.5-12
3 41-50 12.5-15
4 51-60 15.5-18
5 >60 >18
60 FT (18 M) & Shallower
Segments Ascent Rate =
Displayed FPM MPM
00-100-3
1 11-15 3.5-4.5
2 16-20 5-6
3 21-25 6.5-7.5
4 26-30 8-9
5>30>9

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Profile
INFORMATIONALDISPLAYS
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 pos-
sible misunderstanding that could result in error.
DepthDisplays
Duringdives, the Current Depth is displayed(Fig. 3a) from 0 to 330FT (99.9 M) in 1FT (.1 M) in-
crements. The Max Depth reached during that dive will also be displayed (Fig. 3b).
TimeDisplays
Time displays are shown in hour:minute format (i.e., 1:09 represents 1 hour and 9 minutes, not 109
minutes!). The colon that separates hours and minutes blinks once per second when the display is
indicatingreal time (e.g., Dive Time),andissolid(notblinking) when times are calculatedprojec-
tions(e.g., TimetoFly).
PrimarytimessuchasDiveTimeRemaining(Fig.3c)areconfiguredwithlargerdigits,whilesec-
ondary times such as Surface Interval (Fig. 4a) and Time of Day are smaller.
Temperature Display
Temperature (Fig. 4b) is displayed on the Surface Mode screen (Fig. 4b) and can be viewed on an
Alternate Display which can be accessed during dives.
NOTE: The Informational Displays are described in detail as the various
operating modes they appear in are presented throughout this manual.
Fig. 3 - Depth
a
b
Fig. 4 - Time, Temperature
a
b
c
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BACKLIGHT
To activate the Hydroglow®Backlight during dives, depress the button for 2 seconds.
The screen will be illuminated for 10 seconds. Press the button again to activate as desired.
The Backlight is disabled if the button is held depressed longer than 10 seconds or during a Low
BatteryCondition.
NOTE: Sherwood Scuba recommends that you carry primary and backup
dive lights when conducting dives that could include low light situations.
POWERSUPPLY
TheProfileutilizes (1)3 volt,CR2450Lithium Batterythatshould providefrom150 divehoursof
operation if you conduct (1) 1 hour dive each time the unit is activated, to over 300 dive hours of
operation if you conduct (2) or more dives each time the unit is activated.
Battery Indicator
A Battery icon (Fig. 5a) provides an indication of Low Battery Condition. It will only appear on the
Surface and FLY/SAT screens. It will not be displayed on other surface display screens or during
Dive Modes.
Fig. 5 - Low Battery
a
N

17
Profile
Low Battery Condition
• Voltage level is checked upon activation and every 4.5 minutes during operation.
• Once 75% of full power is consumed, the icon will appear on the screens mentioned as a warning that the Battery is to be
changed prior to conducting any further dives with the unit.
• If a Low Battery Condition exists when the unit is activated (by pressing the button), the Battery icon will appear flashing
once per second for 5 seconds followed by shutdown of the unit.
• If the button is not pressed to activate the unit prior to a dive, and a Low Battery Condition exists, the Low Battery icon
will appear flashing as a warning upon descent to 5 FT (1.5 M). No other information will be displayed and the unit will
not enter Dive Mode.
• If the unit did not display the Low Battery icon 'prior to' entering the Dive Mode, and a Low Battery Condition occurs
during the dive, there will be sufficient Battery power to maintain unit operation for the 'remainder of that dive'. The Low
Battery icon will appear upon surfacing when the Surface Main screen is displayed.
OPERATINGTEMPERATURE
TheProfile willoperateinwater temperaturesfrom28° to 95°F(-2 to 35°C)and out ofthewater from 20° to140°F(-6 to60°C).
At extremely low temperatures, the LCD may become sluggish, but this will not affect its accuracy. If stored or transported in ex-
tremely low temperature areas (below freezing), warm the unit and battery with body heat before diving.
Itispossibletodamagetheelectronicsifleftexposedtodirectsunlight,orinahotconfinedspace(likeacartrunk). After
diving, cover it and keep it out of the sun. If inadvertently left in the direct sunlight, the LCD display may become totally black.
If this occurs, immediately immerse it in water. The display should recover its normal appearance after a few minutes. Damage
fromexcessheat,orcold,isnotcoveredbythetwoyearlimitedwarranty.

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SPECIAL WARNINGS and ADDITIONAL SAFETY INFORMATION
Decompression diving, or diving deeper than 130 FT (39 M), will greatly increase your risk of
decompressionsickness.
Sherwood Scuba does not advocate diving to depths below 130 FT (39 M), the basis for which is
purely theoretical.
It should not be considered that the capabilities built into the Profile provide any implied
approval or consent from Sherwood Scuba for individuals to exceed the defined limits of
recreational dive profiles, as agreed on by all internationally recognized training agencies.
The Profile is not intended for use by military or commercial divers.

19
Profile
ACTIVATIONandSETUP

20
PUSHBUTTONACTIVATION
To activate the Profile, press/release the button. It will immediately enter Diagnostic Mode, dis-
playing all 8s (Fig. 6), followed by dashes, then a countdown from 9 to 0. Note that 2 of the digits
do not contain an upper/left segment (Fig. 6a/b).
While conducting diagnostics, the display is illuminated by the backlight as it checks its display
functions to ensure that everything is working properly and that battery voltage is sufficient to
complete a full day of diving. If there is not enough battery voltage, the unit will either deactivate
itself or would not have activated at all.
WARNING: If a Low Battery icon (Fig. 6c) is indicated following diagnostics,
Sherwood Scuba strongly recommends that you DO NOT dive until the
battery is replaced.
The unit will automatically turn Off 2 hours after activation if no dive is made. If the wet activation
contacts are still bridged (the unit is wet), it will automatically reactivate.
When the button is held depressed as the Diagnostic countdown reaches 00, a Serial Number
screen appears displaying the unit’s firmware code Revision Number (Fig. 7a) and Serial Number
(Fig. 7b). Upon releasing the button, the unit will shut Off. Press/release the button to reactivate
the unit and enter Surface Mode.
Fig. 7 - Serial Number
Fig. 6 - Diagnostic Mode
a
b
c
a
b