Sherwood Scuba Profile User manual

2
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. 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 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.
 nspect your computer before every dive - If it shows any signs of damage or abnormal function, O 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 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 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 forma-
tion in divers.
Responsible
Responsible

3
Profile
The following symbols are used throughout this manual to bring your attention to situations that require special consid-
eration. Be sure to read and follow all instructions carefully.
A NOTE is used to emphasize an important maintenance technique.
A CAUTION is used before a maintenance technique that will result in damage to parts if that
technique is not followed carefully.
A WARNING is used before a procedure that will result in serious injury or death if the procedure
is not followed carefully.
N

4
WARNINGS:
 The Profile is intended for use by recreational divers who have successfully completed a nationally rec-
ognized course in scuba diving.
 It is intended only for no decompression diving, N T intentional decompression diving.
 It must not be used by untrained persons who may not have knowledge of the potential risks and haz-
ards of scuba diving.
 You must obtain scuba certification before using the Profile if you have not already done so.
 It is N T for use by military and commercial divers.
 It should N T 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-
ous 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 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 another
unit between dives, or share your computer with another diver underwater.

5
Profile
LIMITED TWO-YEAR WARRANTY
Sherwood Scuba guarantees, to the original purchaser only, that the Profile will be free of defects in materials and/or craftsmanship under normal recreational multi-
level 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 Pro-
file 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 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 registra-
tion 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 in-
spection 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 in-
cluding 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 servic-
ing, 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 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 plastic gauge face, o-rings, batteries, or damage due to accident, abuse, modification, or tampering

6
COPYRIGHT NOTICE
This dive computer 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 / 2002 Design.
Profile Dive Computer Manual, Doc. No. 12-2372
© 2002 Design 2003
TRADEMARK NOTICE
Sherwood Scuba, and the Sherwood Scuba logo are registered trademarks of Sherwood Scuba, Profile and Hydroglow are also trademarks of Sherwood Scuba. 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), Dive Time Remaining (U.S. Patent no. 4,586,136), and Ascent Rate Indicator (U.S. Patent no.
5,156,055).
DECOMPRESSION MODEL
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
Full LCD Display ............................................................................................................................................ 10
FEATURES and DISPLAYS ......................................................................................................................... 11
Introduction .................................................................................................................................................... 12
Control Button ................................................................................................................................................ 13
Intuitive Displays ............................................................................................................................................ 14
Bar Graphs ................................................................................................................................................ 14
Ascent ate Indicator ............................................................................................................................. 15
Nitrogen Bar Graph ................................................................................................................................ 15
Depth Displays .......................................................................................................................................... 16
Time Displays ............................................................................................................................................ 17
Temperature Display .................................................................................................................................. 18
Backlight Feature ........................................................................................................................................... 18
Operating Temperature .................................................................................................................................. 18
ACTIVATION and SETUP ............................................................................................................................ 19
Push Button Activation ................................................................................................................................... 20
Water Contact Activation ................................................................................................................................ 21
Surface sequence .......................................................................................................................................... 22
Surface Mode ................................................................................................................................................ 22
Entering Settings ........................................................................................................................................... 23
To Access Set Mode and Enter Settings .................................................................................................... 23
To Set Units of Measure ............................................................................................................................. 23
To Set Hour Format .................................................................................................................................... 23
To Set Time ................................................................................................................................................ 24
To Set Wet Activation ................................................................................................................................. 24
Responsible

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CONTENTS (CONTINUED)
PRE DIVE and DIVE MODES ....................................................................................................................... 5
Pre Dive Plan Mode ....................................................................................................................................... 26
No Decompression Dive Mode ....................................................................................................................... 27
No Decompression Dive Mode Safety Stop ............................................................................................... 28
POST DIVE MODES ..................................................................................................................................... 9
Post Dive Surface Mode ................................................................................................................................ 30
Transition Period ........................................................................................................................................ 30
After the Transition Period (the First 2 Hours) ............................................................................................31
Time to Fly and DeSat Countdowns ....................................................................................................... 31
Post Dive Plan Mode ............................................................................................................................... 32
Log Mode ............................................................................................................................................... 32
After the First 2 Hours ................................................................................................................................ 34
SPECIAL SITUATIONS ................................................................................................................................ 35
Clear ( eset) ................................................................................................................................................. 36
Emergency Decompression ........................................................................................................................... 37
Nitrogen Bar Graph .................................................................................................................................... 37
Decompression Dive Mode ........................................................................................................................ 38
Managing Decompression Stops................................................................................................................ 40
Violation Modes ............................................................................................................................................. 41
Conditional Violation Mode ......................................................................................................................... 41
Delayed Violation Mode .............................................................................................................................. 42
Immediate Violation Mode and Gauge Mode .............................................................................................. 44
Permanent Violation ................................................................................................................................... 45
Unexpected Loss of Displayed Information .................................................................................................... 46
Special Warnings and Additional Safety Information ....................................................................................... 47
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Profile
CONTENTS (CONTINUED)
CARE, INSPECTION, and SERVICE ........................................................................................................... 49
Care and Cleaning ......................................................................................................................................... 50
Annual Inspections and Service ..................................................................................................................... 51
Battery Life .................................................................................................................................................... 52
Low Battery Condition .................................................................................................................................... 52
Battery eplacement Procedures ................................................................................................................... 53
REFERENCE ................................................................................................................................................ 59
Dive Time emaining ..................................................................................................................................... 60
Altitude Diving ................................................................................................................................................ 61
Flying After Diving .......................................................................................................................................... 62
Multiple Tissue Tracking ................................................................................................................................ 63
No Decompression Limits .............................................................................................................................. 63
epetitive Decompression Diving ................................................................................................................... 64
Specifications ................................................................................................................................................ 65
Glossary ........................................................................................................................................................ 68
Inspection / Service ecord ........................................................................................................................... 71
Responsible

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D
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FULL LCD DISPLAY
1a
1b
1a. Nitrogen Bar Graph - (Green - No Deco)
1b. Nitrogen Bar Graph - (Yellow - No Deco Caution)
1c. Nitrogen Bar Graph - ( ed - Deco)
2a. Ascent ate Indicator - (Green - normal)
2b. Ascent ate Indicator - (Yellow - caution)
2c. Ascent ate Indicator - ( ed - 'Too Fast')
3. Symbol - Low Battery
4. Control Button
5. Symbol - DeSAT (time)
6. Symbol - Total Ascent (time - deco)
7. Symbol - Depth (max feet)
8. Symbol - Depth (max meters)
9. Symbol - Down Arrow (descend)
10. Symbol - Maximum (depth)
11. Symbol - Dive (time)
12. Symbol - Meters/Feet (current depth)
13. Symbol - Time
14. Symbol - Stop (deco)
15. Symbol - UP Arrow (ascend)
16. Symbol - Surface (time/mode)
1c
7
8
2a
9
11
2b
2c
10
12
4
5
6
3
13
14
15
16

11
Profile
FEATURES
and
DISPLAYS

12
INTRODUCTION
Congratulations on your recent purchase of the Sherwood Profile dive computer !
Your Profile presents the information that you need before, during, and after your air dives using an intuitive combination of
easy to read displays and identification symbols.
Tissue loading of nitrogen and ascent rate are presented as segmented bar graphs alongside color coded reference indicators
that bring quick focus to these important status displays.
As you progress through this instructional guide, you will become familiar with all of the unique functions and features avail-
able and see examples of the displays that you could expect to see in the various operational modes. Although it will require
an initial investment of time to become acquainted with the various displays and symbols, youll soon agree that your Profile
is easy to understand and use.
Due to the importance that you understand the Profile thoroughly prior to using it, information will be expanded upon and
some refreshed as you proceed. Relax and read through the complete manual.
It is extremely important that you:
 Read this manual in sequence and understand it completely before attempting to use the Profile.
 Check the Profile frequently during your dive.
 You must also be a trained diver, certified by a recognized training agency in SCUBA diving.

13
Profile
Remember that the rules you learned in your basic SCUBA certification course still apply to the
diving you will do while using a dive computer - some will become even more important. Tech-
nology is no substitute for common sense, and a dive computer only provides the person using it
with data, not the knowledge to use it.
WARNING: Inspect our Profile prior to ever dive, checking for an signs
of the entrance of moisture, damage to the button, or damage to the LCD
displa . If these or other signs of damage are found, return the unit to an
Authorized Sherwood Scuba Dealer. DO NOT attempt to use it until it has
received factor prescribed service.
CONTROL BUTTON
The Profile's control button (Fig. 1a) allows you to select various settings and access specific in-
formation when you choose to see it.
On the surface the control button is used to activate the Profile, access the Log mode, and set
Units of Measure, Hour Format, Time, and the Wet Activation feature.
The button can also be used to access an External Access mode which is used by the factory to
obtain calibration information.
Underwater, the button is used to view Alternate displays of information that revert to a Main
display after 10 seconds.
Fig. 1 - Control Button
a

14
INTUITIVE DISPLAYS
The Profile uses 3 rows of easy to understand alpha/numeric displays and symbols (Fig. 2)
When you enter Special Situations, such as Decompression and various Violation modes, an UP
Arrow symbol (Fig. 2a) will appear on the display as a warning that a controlled ascent is re-
quired. f you ascend above a required Decompression Stop Depth, a DOWN Arrow symbol (Fig.
2b) will appear on the display indicating that you should descend to the Stop Depth.
t is imperative that you understand the formats, ranges, and values of the information presented
by the Profile's numeric and graphic displays to avoid any possible misunderstanding that could
result in error.
BAR GRAPHS
Two segmented bar graphs appear around the perimeter of the screen next to green, yellow, and
red color coded portions of the peripheral decal that denote normal, caution, and danger zones,
respectively.
When underwater, you can quickly focus on the bar graphs to make sure that they are in the
green and you are not getting too close to the no decompression limit or ascending too fast.
Fig. 2 - Symbols
a
b

15
Profile
D
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Ascent Rate Indicator (ARI)
The Ascent Rate ndicator located along the bottom of the screen (Fig. 3a) is provided to help
you avoid excessive ascent rates by providing a visual representation of ascent speed, rather than
just showing that you are ascending too fast.
The AR displays up to 3 segments that may be considered an ascent rate speedometer. Green is
a 'normal' rate, yellow a 'caution' rate, and red is 'Too Fast'. The segments of the Ascent Rate n-
dicator represent 2 sets of speeds which change at a reference depth of 60 feet (18 meters). Refer
to the chart at the right for segment values.
When your Ascent Rate exceeds the maximum recommended rate of 60 feet (18 meters) per
minute when deeper than 60 feet (18 meters) or 30 feet (9 meters) per minute when shallower
than 60 feet (18 meters), the bar graph segments will enter the red 'Too Fast' zone at which time
all 5 segments will flash once per second until your ascent speed is slowed.
Nitrogen Bar Graph (NiBG)
The Nitrogen Bar Graph (Fig. 3b) 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 bar graph, and as you ascend to shallower depths, the bar graph will begin to re-
cede, indicating that additional no decompression time is allowed for multilevel diving.
The Nitrogen Bar Graph also warns you that you have entered Decompression Mode by filling
the red Deco segment. Decompression is described in more detail in the Special Situations sec-
tion of this manual. Fig. 3 - Bar Graphs
b
Ascent Rate Indicator
Deeper than 60 feet (18 m)
Segments Ascent Rate =
Displayed FPM MPM
0 0-20 0 - 6
1 21-40 6.5-12
2 41-60 12.5-18
>60 >18
60 feet (18 m) & Shallower
Segments Ascent Rate =
Displayed FPM MPM
0 0-10 0 -
1 11-20 .5-6
2 21- 0 6.5-9
> 0 >9
a

16
The Nitrogen Bar Graph monitors 12 different nitrogen compartments simultaneously and dis-
plays the one that is in control of your dive at that time. t is divided into a green No Decom-
pression zone, a yellow Caution zone, and a red DECO (decompression) zone.
The yellow Caution zone gives a visual representation of just how close you are to the no decom-
pression limit which allows you to make a decision regarding safety stop duration.
The red DECO zone alerts you to focus your attention on the current required Decompression
Stop Depth indicated graphically in the center of the display.
DEPTH DISPLAYS
The epth displays indicate depths ranging from 0 to 330 feet (99.5 meters) in 1 foot (.1 meter)
increments.
During a dive, Current epth is displayed continuously on the Main display with the symbol
FEET (or METERS) below it (Fig. 4a).
Maximum epth and the symbols MAX MUM and FEET (or METERS) is displayed on the row
below it (Fig. 4b).
n the event that you descend deeper than 330 feet (99.5 meters), the Depth displays will show 3
dashes (- - -) to indicate that you have gone 'out of range'. This is described in more detail in the
Special Situations section of this manual.
a
Fig. 4 - Depth Displays
b

17
Profile
TIME DISPLAYS
The Profile has 3 time displays.
The largest display is the Main Time display (Fig. 5a - bottom row of digits). ndicated is theo-
retical Dive Time Remaining (NDL) or Total Ascent Time (Deco Mode), depending on the oper-
ating mode that the Profile is in at that time.
A second time display (Fig. 5b - left side of the middle row of digits) indicates Time to Fly after a
dive.
The third time display (Fig. 5c - right side of the middle row of digits) indicates Elapsed Dive
Time, Decompression Stop Time Required, Time of Day, or Time to Desaturate after a dive, de-
pending on the operating mode that the unit is in.
Each display is described in detail in subsequent sections of this manual.
Time displays are shown in hour:minute format (i.e., 1:09 represents one hour and nine minutes,
not 109 minutes!). The colon that separates hours and minutes blinks once per second when the
display is indicating real time such as Surface Time, Elapsed Dive Time, and Time of Day. Dive
Time Remaining (NDL), Total Ascent Time (Deco), Deco Stop Time, Time to Fly, and desat
Time are calculated projections of time and use a solid (non-blinking) colon to indicate that they
are counting down.
Fig. 5 - Time Displays
c
b
a

18
TEMPERATURE DISPLAY
While on the Surface, Ambient Temperature is displayed on the Surface Mode screen (Fig. 6a).
During a dive, Water Temperature is displayed when the button is pressed momentarily to view
the Alternate Display (Fig. 7a).
BACKLIGHT FEATURE
During a dive, the Profile's Hydroglow Backlight will illuminate the display when the button is
pressed for 2 seconds and released. The display will remain illuminated for 10 seconds.
OPERATING TEMPERATURE
The Profile will operate in water temperatures from 28° to 95° F (-2 to 35 °C) and in air from
20° to 140°F (-6 to 60 °C). At extremely low temperatures, the LCD may become sluggish, but
this will not affect it's accuracy. f stored or transported in extremely low temperature areas (be-
low freezing), warm the module and battery with body heat before diving.
Fig. 7 - Temperature (Dive)
Fig. 6 - Temperature (Surface)
a
a

19
Profile
ACTIVATION,
and
SETUP

20
D
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ACTIVATION
PUSH BUTTON (PRIMARY METHOD)
To activate the Profile, press the button and release it. The unit will immediately enter iagnos-
tic Mode, displaying all 8s (Fig. 8), followed by dashes, and a countdown from 9 to 0. The
left digit of the Main Time display does not contain a segment in the top/left position.
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. f there is not enough battery voltage, the unit will either deacti-
vate itself or would not have activated at all.
WARNING: If a Low Batter s mbol (Fig. 8a) is indicated following
diagnostics, Sherwood Scuba strongl recommends that ou DO NOT dive
until the Batter is replaced.
The unit will automatically turn OFF 2 hours after activation if no dive is made. f the water ac-
tivation 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 and Serial Number (Fig.
9). Upon releasing the button, the unit shuts Off. Press and release the button to reactivate the
unit and enter Surface Mode.
Fig. 9 - Serial Number
Fig. 8 - Diagnostic Mode
a