Owner's Manual Download

Profile FULL LCD DISPLAY

4 KEY: 1. Control button 2. N2/O2 Bar Graph (shared use) 5 3. ASC (Ascent Rate) Bar Graph 6 4. Low Battery symbol 5. Descend (Down Arrow) symbol 6. Ascend (Up Arrow) symbol

2 3

3 RESPONSIBLE COMPUTER DIVING 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. • 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 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 formation in divers.

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. N NOTE - used to emphasize important information or maintenance technique. 4 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 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 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. 5 COPYRIGHT NOTICE 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.

TRADEMARK NOTICE 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.

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.

6 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 Responsible Set Units of Measure ...... 26 Set Hour Format ...... 26 Set Time ...... 27 Set Deep Stop ...... 27 7 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 Pre Dive 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

SPECIAL SITUATIONS ...... 43 Clear (Reset) ...... 44 High PO2 ...... 45

High O2 ...... 46 R R E

Decompression ...... 47 S E V P I Conditional Violation ...... 48 O N D Delayed Violation 1, 2, 3 ...... 49 SIBLE Violation Gauge Mode ...... 50 8 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 Dive Time Remaining ...... 64 Altitude ...... 65 Flying After Diving ...... 66 Nitrox Diving ...... 67 NOAA Limits ...... 67 Multiple Tissue Tracking ...... 68 Repetitive Decompression Diving ...... 68 No Decompression Limits ...... 69 Specifications ...... 72 Glossary ...... 75 Inspection / Service Record ...... 78

Responsible

9 WARNINGS: • The Profile is intended for use by recreational divers who have successfully completed a nationally recognized course in scuba diving. • 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 haz- ards of scuba diving. • 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 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 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.

10 Profile

FEATURES and DISPLAYS

11 INTRODUCTION

Congratulations on your recent purchase of the Sherwood Profile dive computer!

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 computer only provides the person using it with data, not the knowledge to use it.

12 Profile CONTROL BUTTON 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 imperative that you understand the formats, ranges, and values of the information presented by the numeric and graphic displays to avoid any possible misunderstanding that could result in an error.

BAR GRAPHS b 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 default, 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- a lower depths, the segments will begin to recede, indicating that additional no deco time is allowed. Fig. 1 - Icons and BGs 13 Deeper than 60 FT (18 M) The N2BG monitors 12 different nitrogen compartments simultaneously and displays the one that is Segments Ascent Rate = Displayed FPM MPM in control of your dive. It consists of 5 segments, the lower 4 represent No Decompression status 00-200 - 6 1 21-30 6.5-9 and the fifth at the top indicates a Decompression condition. 2 31-40 9.5-12 3 41-50 12.5-15 4 51-60 15.5-18 5 >60 >18 When the Profile is set to operate in Nitrox mode, the Bar Graph will represent Oxygen accumula-

60 FT (18 M) & Shallower tion when the O2 data screen (Alternate Display) is accessed. Segments Ascent Rate = Displayed FPM MPM 00-100 - 3 1 11-15 3.5-4.5 Regardless of which parameter the Bar Graph is representing at the time, nitrogen and oxygen cal- 2 16-20 5-6 3 21-25 6.5-7.5 culations will continue to be performed in the background. 4 26-30 8-9 5>30>9 ASC 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 a 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 14 Profile INFORMATIONAL DISPLAYS Each numeric and graphic display represents a unique piece of information. It is imperative that b you understand the formats, ranges, and values of the information represented to avoid any possible misunderstanding that could result in error.

Depth Displays During dives, the Current Depth is displayed (Fig. 3a) from 0 to 330 FT (99.9 M) in 1 FT (.1 M) increments. The Max Depth reached during that dive will also be displayed (Fig. 3b). a c

Time Displays Fig. 3 - Depth 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 indicating real time (e.g., Dive Time), and is solid (not blinking) when times are calculated projec- tions (e.g., Time to Fly). b a Primary times such as Dive Time Remaining (Fig. 3c) are configured with larger digits, while sec- 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 N operating modes they appear in are presented throughout this manual. Fig. 4 - Time, Temperature 15 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 Battery Condition.

NOTE: Sherwood Scuba recommends that you carry primary and backup N dive lights when conducting dives that could include low light situations.

POWER SUPPLY a The Profile utilizes (1) 3 volt, CR2450 Lithium Battery that should provide from 150 dive hours of 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 16 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.

OPERATING TEMPERATURE The Profile will operate in water temperatures from 28° to 95° F (-2 to 35 °C) and out of the water from 20° to 140°F (-6 to 60 °C). At extremely low temperatures, the LCD may become sluggish, but this will not affect its accuracy. If stored or transported in extremely low temperature areas (below freezing), warm the unit and battery with body heat before diving.

It is possible to damage the electronics if left exposed to direct sunlight, or in a hot confined space (like a car trunk). 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 from excess heat, or cold, is not covered by the two year limited warranty.

17 SPECIAL WARNINGS and ADDITIONAL SAFETY INFORMATION

Decompression diving, or diving deeper than 130 FT (39 M), will greatly increase your risk of decompression sickness.

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.

18 Profile

ACTIVATION and SETUP

19 c PUSH BUTTON ACTIVATION a To activate the Profile, press/release the button. It will immediately enter Diagnostic Mode, displaying 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 b 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. Fig. 6 - Diagnostic Mode 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. b 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. a

Fig. 7 - Serial Number 20 Profile WET CONTACT ACTIVATION

NOTE: The Wet contacts will only activate the unit if the Wet Activation N feature is Set ON (a user setting).

If the Wet Activation feature is Set ON and the contacts are wet when the unit shuts Off, it will automatically reactivate.

WARNING: Never attempt to activate the Profile underwater. This may result in inaccurate depth and no decompression time displays. If attempt is made to activate the unit when deeper than 4 FT (1.2 M), or at elevations higher than 14,000 feet (4,270 meters), it will perform a diagnostic check followed by immediate shutdown.

Upon activation and every 30 minutes while on the surface, the Profile will check ambient barometric pressure, and calibrate its present depth as zero. At elevations higher than 3,000 feet (915 meters), it will recalibrate itself to provide adjusted No Decompression limits.

WARNING: If any display or function varies from the information presented R

here, return the Profile to your Authorized Sherwood Scuba Dealer for R E

S E V inspection. P I O D NSIBLE

21 SURFACE SEQUENCE While on the surface, the Profile automatically scrolls through a Sequence of displays - • Surface Main screen for 3 seconds • Fly/Desat screen for 3 seconds (only after a dive) • Plan Mode screens (each Depth/Time screen displayed for 3 seconds)

The Sequence repeats for 2 hours or until a dive is made or the button is pressed to access Log Mode or Set Mode.

> To access Set Mode, depress the button for 2 seconds. > To access Log Mode, press/release the button (< 2 seconds).

SURFACE MODE Information displayed includes (Fig. 8, top to bottom) - • Battery icon, if a Low Battery condition exists • Graphic No with dive number for that activation period (0, if no dive made yet), alternating with the graphic WET (if the unit is wet) • Temperature with degrees icon and graphic F (or C) • Surface Interval Time (hr:min) with TIME and SURFACE icons • NITROX icon (if FO2 is set for Nitrox), blank if FO2 is set for Air • Time of Day (hr:min)

Fig. 8 - Surface Mode 22 Profile SET MODE After gaining access to Set Mode, settings can be made in sequence one after the other, or you can access a specific item that you want to set, bypassing others.

• Upon entry into Set Mode, the Set PO2 screen will be displayed with the Set Point flashing. • If the button is not pressed during a 2 minute period while in the Set Mode, operation will revert to Surface Mode and resume the Surface Sequence scroll.

SET PO2 ALARM Factory set for 1.60 (ATA), the PO2 Alarm can be set to values between 1.20 and 1.60 (ATA).

Information displayed includes (Fig. 9) - • Graphics PO2 and AL • Set Point x.xx (ATA) flashing • NITROX icon

> Press/release the button repeatedly (< 2 seconds each time) to step upward through the settings from 1.20 to 1.60 in increments of .10 (ATA). > Depress the button for 2 seconds to save the Set Point and advance to Set FO2.

Fig. 9 - Set PO2 Alarm 23 SET FO2 Each time the unit is activated (if Off), FO2 will be automatically set for a default value of AIR which can then be changed to numerical values for dives using Nitrox mixes.

Information displayed includes (Fig. 10A/B) - • Graphic FO2 • Max Depth allowed for the PO2 Alarm set with MAXIMUM, FEET (or METERS), and NITROX icons when Nitrox is displayed, blank while Air is displayed • Dive Profile icon • Air (or FO2 Set Point 21 to 50) flashing with FO2% icon Fig. 10A - Set FO2 (Air) > Press/release the button repeatedly (< 2 seconds each time) to step upward through the Set Points in increments of 1 per press/release. • For each FO2 numerical value that appears, the Max Depth allowed for the PO2 Alarm set will be displayed. > Depress the button for 2 seconds to save the Set Point and advance to Set FO2 Default (if a Nitrox value was set) or to Set Wet Activation (if Air was selected).

Fig. 10B - Set FO2 (Nitrox) 24 Profile SET FO2 50% DEFAULT Factory set ON, the FO2 50% Default feature can be set to OFF.

Information displayed includes (Fig. 11) - • Graphics DFT and 50 with NITROX icon • Set Point graphic ON (or OFF) flashing

> Press/release the button (< 2 seconds) to toggle between ON and OFF. > Depress the button for 2 seconds to save the Set Point and advance to Set Wet Activation. Fig. 11 - Set FO2 Default SET WET ACTIVATION Factory set for ON, Wet Activation can also be set OFF (disabled) to prevent inadvertent activation during travel or storage.

Information displayed includes (Fig. 12) - • Graphics H2O and SENSOr • Set Point graphic ON (or OFF) flashing

> Press/release the button (< 2 seconds) to toggle between ON and OFF. > Depress the button for 2 seconds to save the Set Point and advance to Set Units.

Fig. 12 - Set Wet Activation 25 SET UNITS OF MEASURE Factory set for Imperial, Units can be set for Metric values.

Information displayed includes (Fig. 13) - • Graphic FT (or M) flashing • FEET (or METERS) icons flashing • Graphic F (or C) flashing

> Press/release the button (< 2 seconds) to toggle between Imperial and Metric. Fig. 13 - Set Units > Depress the button for 2 seconds to save the Set Point and advance to Set Hour Format.

SET HOUR FORMAT Factory set for 12 Hour (12: AM to 11: PM), Hour Format can also be set for 24 Hour (0: to 23:).

Information displayed includes (Fig. 14) - • Set Point graphic 12 (or 24) flashing • TIME icon with graphic hour

> Press/release the button (< 2 seconds) to toggle between 12 and 24. > Depress the button for 2 seconds to save the Set Point and advance to Set Time

Fig. 14 - Set Hour Format 26 Profile SET TIME of DAY Set for local Time at the factory, Time of Day can be set to values between 12:00 AM and 11:59 PM (if 12 Hour Format) or 0:00 and 23:59 (if 24 Hour Format).

Information displayed includes (Fig. 15) - • Graphic AM (or PM) if 12 Hour Format, blank if 24 Hour Format • Time of Day (hr:min) with TIME icon, Hour digits flashing

> Press/release the button repeatedly (< 2 seconds each time) to step upward through the Hour settings. Fig. 15 - Set Time of Day > Depress the button for 2 seconds to save the Hour Set Point, the Minutes digits will flash. > Press/release the button repeatedly (< 2 seconds each time) to step upward through the Minute settings. > Depress the button for 2 seconds to save the Set Point and advance to Set Deep Stop.

SET DEEP STOP Factory set OFF, the Deep Stop feature can be set to ON.

Information displayed includes (Fig. 16) - • Graphic DS (meaning Deep Stop) • Set Point graphic ON (or OFF) flashing

> Press/release the button (< 2 seconds) to toggle between ON and OFF. > Depress the button for 2 seconds to save the Set Point and revert to Surface Mode. Fig. 16 - Set Deep Stop 27 WARNINGS AND SAFETY RECOMMENDATIONS

• The percentage of oxygen (FO2) in the Nitrox mix being used must be 'set before each nitrox dive', unless the FO2 50% Default feature is set OFF (a user setting). • Plan Mode provides predicted times for subsequent dives. Depending on cylinder size, breathing gas consumption, and oxygen accumulation, you may have less time available than indicated because of breathing gas quantity or other limitations. • Until it has shut itself off, you must not use it at a different Altitude than the Altitude at which it was activated. Doing so will result in an error equal to the difference in barometric pressure, and possibly a false dive mode with erroneous data. • To provide proper Altitude compensation, the unit must be manually activated at the new altitude. Dive computers, such as the Profile cannot sense changes in barometric pressure if activated by immersion in water at higher Altitudes. • Use the Caution Zone of the Nitrogen Bar Graph as a visual reference to provide a greater margin of protection between you and the No Decompression Limits. • Every effort should be made to keep each of the Bar Graphs in the normal zone throughout your dives to reduce your risk of exposure to decompression sickness, oxygen toxicity, and the effects of excessive ascent rates.

28 Profile

PRE DIVE and DIVE MODES

29 BUTTON USE While viewing the Surface or Dive Main screens press/release the button to view ALT (Alternate) screens displaying additional information.

During dives, depress the button for 2 seconds to activate the Backlight that will illuminate the display for 10 seconds.

FO2 The Profile can be set for use either as an Air computer or as a Nitrox computer. After activation, it will operate as an Air computer without displaying information associated with oxygen calculations, unless it is set for a percentage of oxygen (FO2) other than Air (e.g., a numerical value between 21 and 50 %).

If it is set for use with Nitrox, the NITROX icon will be displayed (Fig. 17a).

WARNING: When set for Nitrox use, you must verify that the FO2 setting a correctly matches the Nitrox mix being used prior to each Nitrox dive.

USE WITH AIR When set for Air, the Profile will perform calculations the same as if FO2 were set for 21%, inter- nally accounting for O2 accumulation for any subsequent Nitrox dives.

Once a dive is made with the unit set for Nitrox (e.g., FO2 set for a numerical value), it cannot be set to operate as an Air computer until 24 hours elapse after the last dive. Air will not be an option during that time. You can however set FO2 for 21% for use with Air. Fig. 17 - Dive Main (Nitrox) 30 Profile USE WITH NITROX If FO2 is set at a value of 21%, it will remain set at 21% for subsequent dives until FO2 is set to a higher value (22 to 50%), or until it automatically turns Off and is reactivated.

WARNING: When the FO2 Default is set On, the FO2 value must be set for each repetitive Nitrox dive, or the value will automatically be 50 and the dives will be calculated based on 50% O2 for oxygen calculations and 21% O2 (79% nitrogen) for nitrogen calculations.

FO2 50% Default • When the FO2 Default feature is set Off, FO2 will remain as set until another value is selected or the unit shuts Off and reverts to Air until changed to a Nitrox setting. • When the FO2 50% Default feature is set On and FO2 is set at a value of 22 to 50% to match the Nitrox mix being used for that dive, the FO2 setting after that dive will automatically default to a value of 50%.

WARNING: If you surface for greater than 10 minutes during a dive and the FO2 Default is set On, a subsequent descent will be considered a new dive and the FO2 value must be reentered.

31 Depth NDL PRE DIVE PLAN MODE FT(M) hr:min 30 (9) 4:20 (4:43) 40 (12) 2:17 (2:24) NOTE: Sherwood Scuba strongly recommends that you review the Plan 50 (15) 1:21 (1:25) 60 (18) :57 (:59) N Mode prior to every dive to help you plan your dive as required to avoid 70 (21) :40 (:41) 80 (24) :30 (:32) exceeding no decompression or oxygen exposure limits. 90 (27) :24 (:25) 100 (30) :19 (:20) 110 (33) :16 (:17) This is especially important for repetitive dives, when the Plan Mode 120 (36) :13 (:14) 130 (39) :11 (:11) indicates adjusted no decompression limits available for your next dive 140 (42) :09 (:09) based on any residual nitrogen following your last dive and surface 150 (45) :08 (:08) 160 (48) :07 (:07) interval. 170 (51) :07 (:06) 180 (54) :06 (:06) 190 (57) :05 (:05) WARNING: The Plan Mode predicts only no decompression times for NDLs for Air (no dive made yet) subsequent dives. Depending on cylinder size and air consumption you may have less time available than indicated. a Plan Mode appears as part of the Surface Sequence (Surface Main > Fly/Desat > Plan).

With each Depth displayed in the Plan Mode, you will see predicted no decompression limits (NDLs) based upon your previous dive profiles. The DIVE TIME icons will be displayed (Fig. 18a) with a sequence of theoretical dive times available for depths ranging from 30 FT (9 M) to 190 FT (57 M) in 10 FT (3 M) increments.

No decompression times are only displayed for depths where there is at least 1 minute of dive time Fig. 18 - Plan Mode available at that depth, taking into account a descent rate of 60 FT (18 M) per minute. 32 Profile NO DECO MAIN The Profile will enter the No Deco Dive Mode when you descend to 5 FT (1.5 M) for 5 seconds.

Information displayed includes (Fig. 19) - • Max Depth with MAXIMUM and FEET (or METERS) icons • Elapsed Dive Time (hr:min) with DIVE TIME icons • NITROX icon, blank if Air • Current Depth with the FEET (or METERS) icon • Dive Time Remaining (min) with MINUTES icon • N2BG (nitrogen loading) and ASC (when ascending) Fig. 19 - No Deco Main > Pressing/releasing the button will access the ALT 1 screen. > Depressing the button for 2 seconds will activate the Backlight for 10 seconds.

NO DECO ALT 1 Information displayed includes (Fig. 20) - • Temperature with degrees icon and graphic F (or C) • Time of Day (hr:min) with TIME icon • Current Depth with the FEET (or METERS) icon > Pressing/releasing the button will access the ALT 2 screen, if Nitrox; or if Air, the DSP (Deep Stop Preview) screen if triggered > Operation will revert to the Main after 5 seconds if ALT 2 or the DSP is not accessed. > Depressing the button for 2 seconds will activate the Backlight.

Fig. 20 - No Deco Alt 1 33 NO DECO ALT 2 (only if Nitrox) Information displayed includes (Fig. 21) - • PO2 level (x.xx ATA) with graphic PO2 • NITROX icon • Current Depth with the FEET (or METERS) icon • FO2 value set, with FO2% icon • O2BG (oxygen accumulated) > Pressing/releasing the button will access the Deep Stop Preview screen, if triggered. > Pressing/releasing the button will revert to the Main screen, if the DS has not triggered. Fig. 21 - No Deco Alt 2 > Operation will revert to the Main after 5 seconds if the button is not pressed. > Depressing the button for 2 seconds will activate the Backlight.

NO DECO DEEP STOP (DS) During No Deco dives in which Depth exceeds 80 FT (24 M), a Deep Stop Preview screen can be accessed (if set On) that will revert to the No Deco Main after 5 seconds. • The intent of this screen is to suggest that a Stop should be made as indicated (at 1/2 Max Depth) to help reduce the probability of DCS (decompression sickness).

Information displayed includes (Fig. 22) - • Graphic DSP (meaning Deep Stop Preview) • Stop Depth with FEET (or METERS) icon and Stop Time 2:00 (min:sec) with TIME-STOP icons • NITROX icon, blank if Air Fig. 22 - Deep Stop Preview • Current Depth with FEET (or METERS) icon 34 Profile • Dive Time Remaining (min) with MINUTES icon • N2BG and ASC (when ascending) > Operation will revert to the Main after 5 seconds or if the button is pressed/released. > Depressing the button for 2 seconds will activate the Backlight.

NOTE: The Deep Stop is not required and although recommended, it does not have to be taken. N There will be no penalty if the Stop is ignored and ascent (or other activity) is continued.

The Deep Stop feature will be disabled and its screens not displayed if you enter Deco or High O2 (=> 80%), during High PO2 (=> Alarm Set Point), or descend to > 190 FT (63 M).

Upon ascending to within 10 FT (3 M) below the calculated Deep Stop, a Deep Stop (DS) Main screen will automatically appear.

Information displayed includes (Fig. 23) - • Graphics DEEP and STOP alternating, each on 2 seconds • Stop Depth with FEET (or METERS) icon and countdown timer (min:sec) with TIME-STOP icons • NITROX icon, blank if Air • Current Depth with FEET (or METERS) icon • Dive Time Remaining (min) with MINUTES icon • N2BG > Pressing/releasing the button will access the ALT 1, 2, and 3 screens, which are similar to the No Deco Main, ALT 1, and ALT 2 screens previously described. > Depressing the button for 2 seconds will activate the Backlight. Fig. 23 - Deep Stop Main 35 In the event that you descend 10 FT (3 M) deeper than, or ascend 10 FT (3 M) shallower than, the Deep Stop Depth during the countdown, the No Deco Main screen will replace the Deep Stop Main which will be disabled for the remainder of that dive.

NO DECO SAFETY STOP Upon ascending to 20 FT (6 M) on No Deco dives that exceed 30 FT (9 M), a Safety Stop screen appears with a timer that counts down from 3:00 to 0:00 (min:sec).

Information displayed includes (Fig. 24) - • Graphics SAFE, STOP, and 20FT (or 6 M) scrolling, each on 2 seconds • Stop Depth as 20 (or 6) with FEET (or METERS) icon and countdown timer (min:sec) with TIME-STOP icons • NITROX icon, blank if Air • Current Depth with FEET (or METERS) icon • Dive Time Remaining (min) with MINUTES icon • N2BG > Pressing/releasing the button will access the ALT 1, 2, and 3 screens, which are similar to the No Deco Main, ALT 1, and ALT 2 screens previously described. > Depressing the button for 2 seconds will activate the Backlight.

• In the event that you descend below 30 FT (9 M) during the countdown, the No Deco Main will replace the Safety Stop Main screen. The Safety Stop feature will reset and be displayed again upon ascent to 20 FT (6 M). • The Safety Stop is not mandatory and there is no penalty if you surface during the countdown period. Fig. 24 - Safety Stop Main 36 Profile

POST DIVE MODES

37 POST DIVE SURFACE MODE When you ascend to 2 FT (0.6 M) for 1 second, the Profile will enter Surface Mode and begin counting your Surface Interval.

TRANSITION PERIOD The first 10 minutes on the surface is, in effect, a Transition Period during which time the following information is displayed (Fig. 25): • Battery icon, if a Low Battery condition exists • Graphic No with dive number for that activation period (0, if no dive made yet), alternating Fig. 25 - Transition Period with the graphic WET (if the unit is wet) • Temperature with degrees icon and graphic F (or C) • Surface Interval Time (hr:min) with TIME and SURFACE icons, the Time's colon and SUR- FACE icon will flash • NITROX icon (if FO2 is set for Nitrox), blank if FO2 is set for Air • Time of Day (hr:min) • NiBG > Press/release the button to view that dive's Log 1 screen (Fig. 26). See page 40. > Press/release the button again to view the Log 2 screen, then again the Log 3 screen. > Operation will revert to the Surface Main after 2 minutes of no button action or if the button is depressed for 2 seconds while viewing a Log screen.

NOTE: Data will not be stored in the Log until the 10 minute Transition N Period is completed. Also, no other modes/screens are accessible. Fig. 26 - Log Mode 38 Profile If you descend during the Transition Period, time underwater will be considered a continuation of that dive. The time at the surface (if less than 10 minutes) will not be added to Elapsed Dive Time.

AFTER THE TRANSITION PERIOD (the first 2 hours) Once 10 minutes have elapsed, the SURFACE icon and Surface Interval Time colon stop flashing indicating that the Dive and Transition Period are completed, and a subsequent descent will be considered a new dive. The dive will then be entered into the Dive Log.

For the remainder of the first 2 hours after surfacing, the Surface Sequence will be displayed, scrolling through the Surface Main, Fly/Desat Time, and Plan screens. You will have full access to the Log Mode and Set Mode.

Time to Fly and Desat Time Displayed are the graphics FLY:SAT and FLY with a countdown timer (Fig. 27a) that begins counting down 10 minutes after the last dive (after the Transition Period) at 23:50 (hr:min) and counts a b down to 0:00.

Also displayed is the Desat counter (Fig. 27b) that provides calculated time for tissue desaturation at sea level. It begins 10 minutes after the last dive displaying the TIME and SAT icons with a countdown that starts at 23:50 (hr:min) maximum and counts down to 0:00.

If a Violation occurred during that dive, Time to Desat will not be displayed and a single dash ( - ) will appear instead of the graphic FLY. Fig. 27 - Time to Fly / Desat 39 Post Dive Plan Mode After dives, Plan screens (Fig. 28) will display adjusted NDLs based on your previous dive profiles.

The Plan will only display Depths/Times to the Max Depth allowed by the nitrogen limit. The calculated dive times and the maximum allowed depth displayed will increase as the real time Surface Interval increases after completion of a dive.

Log Mode Information from your latest 50 dives is stored in the Log for viewing. After exceeding 50 dives, the oldest dive in the Log will be overwritten by the most recent dive.

• Log information will not be lost when the battery is removed/replaced, but factory service will delete data. • Log Mode recalls dives in reverse order from the one most recently recorded back to the oldest of the 50 dives stored. Your most recent dive will always be the first shown when Log Mode is accessed. • Each dive has 3 Log screens. • Dives are identified by the Dive Number (for that activation period) and Time started. The first dive of a new Activation Period will always be #1.

To access Log Mode and view the 1st screen of the most recent dive: • press/release the button while the Surface Sequence is scrolling through screens.

Fig. 28 - Plan (adjusted NDLs) 40 Profile LOG (Fig. 29) • Graphic LOG • Dive number (1 to 50) for that activation period with DIVE icon • NITROX icon, blank if Air • Altitude level graphic SEA (or L-2 through L-7, or otr meaning out of range) • FO2 set point with FO2% icon (if Nitrox), or graphic Air > Pressing/releasing the button (< 2 seconds) will access that dive’s Log Data 1 screen. > Depressing the button for 6 seconds reverts to the Surface Main screen. > If the button is not pressed, operation reverts to the Surface Main after 2 minutes. Fig. 29 - Log LOG DATA 1 (SCR1 - Fig. 30) • Graphic SCR1 • Temperature (minimum recorded that dive) with degrees icon and graphic F (or C) • Surface Interval if a repetitive dive, 3 dashes ( - : - - ) if no previous dive that activation period, with TIME and SURFACE icons • NITROX icon, blank if Air • Max Depth achieved with FEET (or METERS) icon • Elapsed Dive Time with MINUTES icon • N2BG, max accumulated segment flashing, others fixed up to end-of-dive accumulation, all flashing for Violations. • ASC, displaying max rate sustained for 4 consecutive seconds > Pressing/releasing the button will access that dive’s Log Data 2 screen. > Depressing the button for 6 seconds reverts to the Surface Main screen. > If the button is not pressed, operation reverts to the Surface Main after 2 minutes. Fig. 30 - Log Data 1 41 LOG DATA 2 (SCR2 - Fig. 31) • Graphic SCR2 • Time of Day (hr:min) dive Started with Down Arrow icon • Time of Day (hr:min) dive Ended with Up Arrow icon • NITROX icon, blank if Air • Max PO2 achieved (x.xx ATA) with graphic PO2, if Nitrox, blank if Air • O2BG fixed up to end-of-dive accumulation, if Nitrox, blank if Air > Pressing/releasing the button will access the previous dive's LOG screen. > Depressing the button for 6 seconds reverts to the Surface Main screen. > If the button is not pressed, operation reverts to the Surface Main after 2 minutes.

AFTER THE FIRST 2 HOURS Two hours after the last dive, the unit will no longer scroll through the Surface Sequence. Instead, the Fly/Desat screen (countdown timers) will be displayed continuously, giving the final count- downs to 0:00.

To access other modes or enter settings while in Fly/DeSat Mode: • press the button to reactivate the Surface Sequence. • The Fly/Desat screen will appear in the Sequence and again be the only screen displayed after 2 hours, if the button is not pressed.

Fig. 31 - Log Data 2 42 Profile

SPECIAL SITUATIONS

43 CLEAR (RESET) The Profile is configured with a feature that allows calculations pertaining to a dive series in progress to be interrupted. Activa- tion of this feature will delete all data accumulated during the dive series necessary for planning a next dive and should only be performed if the user plans to suspend diving for at least 24 hours.

This feature is present to provide institutional users of the computer a means to provide a "clean" computer to subsequent users without having to wait for the computer to complete all calculations in real time. This practice requires strict control to ensure that the "clean" computer is not used by a diver that has been diving within the preceding 24 hours. Failure to follow this practice could adversely affect the accuracy of subsequent calculations by failing to account for previous exposure to elevated nitrogen absorption.

WARNING: Do not attempt to activate the CLEAR (Reset) function on your computer. Proper activation of this feature requires controlled procedures and is restricted to authorized personnel.

WARNING: Improper activation of this feature could expose the user to elevated risk of decompression sickness. This is a serious risk and could result in injury or death.

WARNING: If the CLEAR (Reset) screen appears (Fig. 32), cease all operation of the unit's button and wait until Surface Mode appears on the display (2 minutes). If the unit shuts Off completely, all calculations for repetitive dives will be cleared in which case you must wait at least 24 Fig. 32 - Clear hours before resuming diving activity. 44 Profile HIGH PO2 Upon reaching .20 ATA less than the PO2 Alarm Set Point, a cautionary mode is entered. The graphic UP, Up Arrow icon, and PO2 value (x.xx ATA) with graphic PO2 are displayed solid on the Main Dive screen with Current Depth, Dive Time Remaining, and the N2BG (Fig. 33).

If PO2 decreases, the Dive Main screen will be restored. If PO2 continues to increase and reaches the Alarm Set Point, the message UP >> HIGH >> PO2 scrolls.

• During High PO2 conditions, the Deep Stop feature and displays are disabled. Fig. 33 - High PO2 Warning High PO2 Main, information displayed includes (Fig. 34) - • Message UP >> HIGH >> PO2, scrolling (each on 2 seconds) • PO2 Value flashing with graphic PO2 • UP Arrow icon flashing • NITROX icon • Current Depth with FEET (or METERS) icon • NDC (min) with MINUTES icon • N2BG and ASC while ascending > Depress the button for 2 seconds to activate the Backlight. > Press/release the button to access ALT screens that display information similar to those previously described. The message UP >> HIGH >> PO2 continues to scroll while the ALT screens are displayed.

Fig. 34 - High PO2 Main 45 HIGH O2 A cautionary mode is entered when O2 increases to 80% (240 OTU) of the Maximum allowed for a single dive or 24 hour period (100% or 300 OTU). The graphics HIGH >> O2 alternate (each on 1/2 second), and the UP Arrow icon flashes (Fig. 35) until on the surface.

• When O2 saturation reaches 100% (the 300 OTU limit), the O2BG is displayed (in place of the N2BG) with all segments flashing. • When High O2 occurs (=> 80%), the Deep Stop and Safety Stop features and displays are disabled for the remainder of that dive. Fig. 35 - High O2 Warning High O2 Main (at 100%), information displayed includes (Fig. 36) - • Graphics UP >> HIGH >> O2 (scroll, each on for 2 seconds) • Graphics 100 and SAt, indicating % O2 Saturation at limit • UP Arrow icon flashing • NITROX icon • Current Depth with FEET (or METERS) icon • Dive Time Remaining as 0 (min) with MINUTES icon • O2BG, all segments flashing, ASC while ascending > Depress the button for 2 seconds to activate the Backlight. > Press/release the button to access ALT screens that display information similar to those previously described. The message UP >> HIGH >> O2 continues to scroll while the ALT screens are displayed.

Fig. 36 - High O2 Main 46 Profile DECOMPRESSION Decompression Dive Mode (DECO) is entered when nitrogen calculations determine that you cannot safely surface without stopping at a predetermined depth to allow off gassing of absorbed nitrogen. The message DECO >> STOP >> xxFT (or xxM) scrolls at the top of the screen (each on 2 seconds). The UP Arrow icon will be displayed flashing (Fig. 37), if 10 FT (3 M) deeper than the required Stop Depth, then is removed once within 10 FT (3 M) below the required Stop Depth. • Once DECO is activated, the Deep Stop and Safety Stop features and displays are disabled for the remainder of that dive.

Deco Stop Main, information displayed includes (Fig. 38) - Fig. 37 - Deco Entry • Graphics DECO >> STOP >> xxFT (or M) scrolling, each on for 2 seconds • Stop Depth with FEET (or METERS) icon • Stop Time (hr:min) with TIME - STOP icons • NITROX icon, blank if Air • Current Depth with FEET (or METERS) icon • Total Ascent Time (min) with TOTAL ASCENT and MINUTES icons • N2BG, all segments on solid > Depress the button for 2 seconds to activate the Backlight. > Press/release the button to access ALT Displays that display information similar to those previously described. The message continues to scroll when ALT screens are displayed.

Fig. 38 - Deco Stop Main 47 CONDITIONAL VIOLATION (CV) If you disregard a Decompression obligation (i.e., ascend above the Required Stop Depth), operation enters Conditional Violation Mode. The message DOWN >> TO >> STOP scrolls at the top of the screen (each on 2 seconds). If the situation is corrected within 5 minutes, meaning you descend below the Required Stop Depth, operation continues in Decompression Mode, otherwise it enters Delayed Violation Mode indicated by the entire N2BG flashing.

CV Main, information displayed includes (Fig. 39) - • Graphic message DOWN >> TO >> STOP scrolling, each on for 2 seconds • Down Arrow icon flashing until within 10 FT (3 M) below the Stop Depth • Stop Depth with FEET (or METERS) icon • Stop Time (hr:min) with TIME - STOP icons • NITROX icon, blank if Air • Current Depth with FEET (or METERS) icon • Total Ascent Time (min) with TOTAL ASCENT and MINUTES icons • N2BG, all segments on solid > Depress the button for 2 seconds to activate the Backlight. > Press/release the button to access ALT Displays that display information similar to those previously described. The message continues to scroll when ALT screens are displayed.

Fig. 39 - CV Main 48 Profile DELAYED VIOLATION # 1 (DV1) DV1 is a continuation of CV which occurs if you remain above the Stop Depth for longer than 5 minutes. After 5 minutes, the Down Arrow icon will continue to flash and the message DOWN >> TO >> STOP will continue to scroll. In addition, Total Ascent Time and the full N2BG will flash (Fig. 40) until you descend to the Required Stop Depth indicated.

While above the Required Stop Depth, no off gassing credit will be given and for each minute that you remain above the Required Stop Depth indicated, 1.5 minutes of Penalty Time will be added to the Deco Stop Time and Total Ascent Time. Fig. 40 - DV1 Main DELAYED VIOLATION # 2 (DV2) When the Required Deco Stop Depth is greater than 60 FT (18 M), but less than 70 FT (21 M), operation enters DV2. The full N2BG flash and the message DECO >> STOP >> 60FT (or 18M) will scroll (Fig. 41).

To get back to the surface, you would have to ascend to just deeper than 60 FT (18 M), staying as close to that Depth as possible until the Stop Depth of 50 FT (15 M) appears. You would then continue to follow the Decompression Schedule indicated to the surface.

DELAYED VIOLATION # 3 (DV3) When the Max Operating Depth (MOD) of 330 FT (99.9 M) is exceeded, operation enters DV3 displaying Current Depth and Max Depth as 3 dashes (- - -) signifying out of range.

Fig. 41 - DV2 Main 49 The Up Arrow icon and N2BG segments (only those loaded) will flash, and the message UP >> TOO >> DEEP will scroll (Fig. 42).

When you ascend to, or above, the MOD, Current Depth will be restored, however, Max Depth will remain as 3 dashes (- - -).

VIOLATION GAUGE MODE (VGM) When a Decompression Stop Depth greater than 70 FT (21 meters) is required, operation enters VGM for the remainder of that dive and subsequent dives made within a 24 hour period. Fig. 42 - DV3 Main Once in VGM, the unit operates with limited functions without any nitrogen or oxygen monitoring or calculations. ALT displays, the Deep Stop, and the Safety Stop will not be available.

Information displayed while underwater includes (Fig. 43) - • Graphic message UP >> VIOL scrolling, each on for 2 seconds • Max Depth with MAXIMUM and FEET (or METERS) icons • Elapsed Dive Time (hr:min) with DIVE TIME icons • UP Arrow icon, flashing • NITROX icon, blank if Air • Current Depth with FEET (or METERS) icon • NDC as 0 with MINUTES icon • Full N2BG flashing, ASC while ascending > Depress the button for 2 seconds to activate the Backlight. Fig. 43 - VGM Main 50 Profile VGM on Surface On the surface, the graphic VIOL will be displayed for the first 5 minutes (Fig. 44A), then it will alternate with the Dive No (or graphic WET) with other screen information (Temperature, SI, Time of Day) displayed as it normally would be.

A continuous 24 hour surface interval must be served before the unit will operate as a full function dive computer. Plan Mode and Desat will not be available.

Fig. 44A - VGM (surface)

Fig. 44B - VGM (surface) 51 SPECIAL WARNINGS and ADDITIONAL SAFETY INFORMATION

There are few legitimate excuses for making unplanned Decompression dives, and the consequences of this type of diving can be severe. By making an unplanned Decompression dive without the necessary preparation and training, you will have placed yourself in an unnecessarily dangerous situation. Allow a surface interval of at least 24 hours before reentering the water in the event a dive requires emergency decompression.

By entering decompression, you automatically impose a ceiling above you which you cannot immediately ascend beyond, denying you free access to the surface.

Exiting the water with the Nitrogen Bar Graph in the DECO zone greatly increases the risk of decompression sickness, and may result in injury or death.

Existing data for making planned decompression dives is extremely limited, and virtually nonexistent for repetitive decompression diving. Decompression diving greatly increases your risk of decompression sickness.

52 Profile

CARE, INSPECTION, and SERVICE

53 CARE AND CLEANING The Profile is a sensitive electronic instrument. Although it has been built to endure the rigors of diving, it still must be handled carefully to protect it from shock, excessive heat, chemical attack, and tampering. The housing is made of an impact resistant resin that is shock resistant but susceptible to scratches and attack by strong chemicals.

CAUTION: Never spray aerosols of any kind on, or near, the Profile. The propellants may chemically attack the plastic.

Be careful not to leave it in an unsupervised, unprotected location where it might be damaged. Many dive computers (and dive trips) are ruined due to carelessly tossed weight belts or cylinders.

If the lens becomes scratched, Sherwood Scuba can replace it, although small scratches will naturally disappear underwater. For even more convenience and additional protection against scratches, place a transparent Instrument Lens Protector on the gauge face. This can be purchased from your Authorized Sherwood Scuba Dealer.

CLEANING Soak and rinse the Profile in fresh water following each day of diving, preferably after each dive, and ensure that it is free of any debris or obstructions that would block the sensors. If possible, use lukewarm water to dissolve any salt crystals. Salt deposits can also be dissolved using a 50% vinegar/50% fresh water bath. Towel dry before storing, and transport your Profile cool, dry, and protected.

CAUTION: Never, under any circumstances, poke any object through any slots or holes on the back or side of the Profile. Doing so may damage the Depth Sensor, possibly resulting in erroneous depth and/or dive time remaining displays. 54 Profile ANNUAL INSPECTIONS AND SERVICE Your Profile should be inspected annually by an Authorized Sherwood Scuba Dealer who will perform a factory prescribed function check and inspection for damage or wear. To keep the 2 year limited warranty in effect, this inspection must be completed one year after purchase (± 30 days). The original sales receipt and owner's portion of the Warranty Registration Card must be presented at the time of service. It is recommended that you have this inspection performed even after the warranty period has expired to ensure your Profile is working properly.

A service record is provided in the back of this manual for your convenience. It should be signed by the Authorized Sherwood Dealer service technician after each annual inspection or factory service. The costs of annual inspections are not covered under the terms of the 2 year limited warranty.

WARNING: If you are in doubt about the accuracy of your Profile's depth readings, DO NOT attempt to dive with it until it has been inspected by an Authorized Sherwood Scuba Dealer.

The facility conducting the depth check must have a pressure test chamber that is capable of pressurizing the Profile to its maximum operating depth (330 FT/99.9 M). Also, the test gauge on the pressure test chamber must be as accurate as the Depth Sen- sor in the Profile (±1% of full scale).

CAUTION: Never pressure test the Profile in an air environment. Doing so may damage the Depth Sensor; possibly resulting in erroneous depth or time readings.

It is possible to damage the Profile Depth Sensor if it is not pressure tested properly. The Profile must be placed completely underwater when being pressure tested to protect the Depth Sensor.

55 BATTERY LIFE Battery consumption rate varies throughout periods of operation, which begin upon activation and continue for 24 hours after surfacing from a dive. The exact number of dives, or hours of operation, that you will obtain is subject to variables, such as, temperature, the number of dives conducted during each operational period, and the frequency and duration that the backlight is used (excessive use will reduce battery life).

Tests and calculations indicate that a new CR2450 Lithium battery will maintain unit operation for approximately - • 150 dives, if (1) 1 hour dive per activation period to over - • 300 dive hours, if (2) or more 1 hour dives per activation period

a LOW BATTERY CONDITION During operation, voltage level is checked every second while on the surface. You will be alerted to a Low Battery condition by a Battery icon appearing on the Surface display (Fig. 45a).

Upon decreasing to a voltage level that will not maintain proper unit operation, the icon will flash for 5 seconds followed by shutdown of the unit.

If the Profile did not display the Low Battery icon prior to entering the Dive mode, and a Low Bat- tery condition occurs during a dive, there will be sufficient battery power to maintain operation for the remainder of that dive, however the Backlight will be disabled. You will be alerted by the Bat- tery icon being displayed upon surfacing. Fig. 45 - Low Battery 56 Profile NOTE: Sherwood Scuba strongly advises that you replace the Battery and N DO NOT attempt to dive when the Battery icon remains on the display, and that you replace the Battery with a new one prior to any multi day dive trip.

BATTERY REPLACEMENT PROCEDURES

Module Removal from Boot If the Profile is in a Wrist Boot, it will be necessary to peel the lips of the Boot downward off the Module while applying pressure from underneath, working it out slowly.

If it is in a Console, bend the rubber Console Boot back to expose the edge of the Module. If the Boot is flexible enough to permit, you may bend it back far enough to scoop the Module out with your finger. Otherwise, it may be necessary to insert a blunt screwdriver until the tip rests just underneath the Module. DO NOT pry the Module from the Console! Slowly increase the pressure under the Module by releasing the tension on the rubber Boot. The Module will slide up the screwdriver and exit the Console.

CAUTION: The procedure that follows must be closely adhered to. Damage due to improper battery replacement is not covered by the Profile's limited 2 year warranty. Responsible

57 Battery Replacement The Battery Compartment should only be opened in a dry and clean environment with extreme care taken to prevent the entrance of moisture or dust.

As an additional precautionary measure to prevent formation of moisture in the Battery Compart- ment, it is recommended that the Battery be changed in an environment equivalent to the local out- door temperature and humidity (e.g., do not change the Battery in an air conditioned environment, then take it outside during a hot sunny day).

• Inspect the Button, Lens, and Housing to ensure they are not cracked or damaged. • If there is any sign of moisture in the module, DO NOT use the Profile until it receives proper service by an Authorized Sherwood Scuba Dealer.

WARNING: If damage, moisture, or corrosion is found, it is recommended that you return your Profile to an Authorized Sherwood Scuba Dealer, and DO NOT attempt to use it until it has received factory prescribed service.

NOTE: If the old battery can be removed and the new one inserted within 8

N seconds, nitrogen and oxygen calculations, and settings, will be retained

R R E for repetitive dives. S E V P I O D NSIBLE

58 Profile Battery Hatch Removal • Locate the Battery Compartment on the back of the module. • While applying steady inward pressure on the center of the Battery Hatch, rotate the Hatch Retaining Ring 10 degrees clockwise by pressing against the upper tab of the Retaining Ring with a small blade screwdriver (Fig. 46). • Lift the Hatch Ring up and away from the Housing, or turn the module over to allow the Ring to drop out into your hand. • Remove the Battery Hatch. Fig. 46 - Hatch Ring Removal Battery Removal • Remove the Retaining Bar located across the lower portion of the Battery (Fig. 47a). • Remove the Hatch O-ring. DO NOT use tools • Using care not to damage the Battery Contacts (Fig. 47b/c), slide the Battery up and out of the Battery Compartment.

Inspection • Closely check all of the sealing surfaces for any signs of damage that might impair proper c a sealing. • Inspect the Buttons, Lens, and Housing to ensure they are not cracked or damaged. • If it is necessary to clean the Battery Compartment, flush it and all components with a solu- tion of 50% white vinegar and 50% fresh water. Rinse with fresh water, and allow to dry overnight, or blow dry with a hair dryer (set at 'no heat'). b

Fig. 47 - Battery Compartment 59 WARNING: If damage or corrosion is found in the Battery Compartment, return your Profile to an Authorized Sherwood Scuba Dealer, and DO NOT attempt to use it until it has received factory prescribed service.

Battery Installation • Slide a new 3 volt type CR2450 Lithium Battery, negative (-) side down into the Battery Cav- ity. Slide it in from the right side and ensure that it slides under the contact clip on the left Fig. 48 - Battery Insertion rim of the cavity (Fig. 48). • Orient the Retaining Bar across the lower portion of the Battery and carefully push it down into position (Fig. 49).

Battery Hatch and Hatch Retaining Ring Installation • Replace the Hatch O-ring with a new one. This O-ring must be a genuine Sherwood Scuba part that can be purchased from an Authorized Sherwood Scuba Dealer. Use of any other O-ring will void the warranty. Fig. 49 - Retaining Bar • Lightly lubricate the new Hatch O-ring with silicone grease and place it on the inner rim of the Battery Hatch. Ensure that it is evenly seated. • Slide the Hatch Retaining Ring, top portion first (small opening), onto your thumb (Fig. 50). • Carefully place the Battery Hatch (with O-ring) into position on the rim of the Battery Com- partment, then press it evenly and completely down into place with your same thumb. • Maintain the Battery Hatch securely in place and, using your other hand, slide the Retaining Ring down off your thumb and into position around the Battery Compartment. • The tabs on the Retaining Ring fit down into the two slots located at the 2 and 8 o'clock po- Fig. 50 - Retaining Ring sitions. 60 Profile • Using your fingers, turn the Ring counter clockwise 5 degrees until the tabs engage (Fig. 51), then tighten it 5 more degrees by turning it counter clockwise with the aide of a small blade screwdriver (Fig. 52).

NOTE: While tightening (turning) the Retaining Ring, exert continuous N inward pressure on it until it is secured in the proper position. A small symbol located on the Ring should be aligned with the Locked symbol located on the Housing (Fig. 52 a/b) Fig. 51 - Retaining Ring Tabs Inspection • Activate the unit and watch carefully as it performs a full diagnostic and battery check, and enters Surface Mode. Observe the LCD display to ensure it is consistently clear and sharp in contrast throughout the screen.

WARNING: If there are any portions of the display missing or appearing dim, or if a Low Battery condition is indicated, return your Profile to an Authorized Sherwood Scuba Dealer for a complete evaluation before attempting to use it. a

Fig. 52 - Securing the Retaining Ring 61 Returning the Module to the Boot • If the Boot was fitted with a Spacer and it was previously removed, replace the Spacer into the Boot. • Orient the Module over the opening in the Boot, and dip the bottom edge into it while pressing the top edge with the palm of your hand. Stop pressing when the bottom edge of the Module has just entered the Boot. • Correct the alignment of the Module as needed so that it is straight. • Press the Module completely into place with your thumbs, watching the alignment, until it snaps into place.

NOTE: The Wet Activation Contacts are located on the stem of the N Button and on metal Pins located on the lower left side of the module. The Profile module is designed for use in a Boot that has an opening on the left side which exposes the Pins (and side Wet

Activation Contact) to water upon immersion.

R R E WARNING: If the Profile is installed in a Boot that does not have the S E V P I side opening where the side Wet Activation Contact is located, the O D NSIBLE unit may not activate automatically upon descending on a dive.

62 Profile

REFERENCE

63 DIVE TIME REMAINING (DTR) One of the most important pieces of information on the Profile is the patented Dive Time Remaining numeric display. To numerically display Dive Time Remaining, the Profile constantly monitors no decompression status. This unique feature has been granted U.S. Patent No. 4,586,136.

No Deco DTR is the maximum amount of time that you can stay at your present depth before entering decompression. It is calculated based on the amount of nitrogen absorbed by 12 hypothetical tissue compartments. The rates each of these compartments absorb and release nitrogen is math- ematically modeled and compared against a maximum allowable nitrogen level. Whichever one of the 12 is closest to this maximum level is the controlling compartment for that depth. Its resulting value will be displayed numerically with the MINUTES icon (Fig. 53a) and graphically as the N2BG.

As you ascend from depth following a dive that has approached the No Deco Limit, the N2BG will recede as control shifts to slower compartments. This is a feature of the decompression model that is the basis for multilevel diving, one of the most important advantages the Profile offers.

The decompression algorithm is based upon Haldane’s theory using maximum allowable nitrogen levels developed by Merrill Spencer. Repetitive diving control is based upon experiments designed and conducted by Dr. Ray Rogers and Dr. Michael Powell in 1987. Diving Science and Technol- ogy® (DSAT), a corporate affiliate of PADI®, commissioned these experiments. a

Fig. 53 - No Deco DTR 64 Profile ALTITUDE Atmospheric pressure decreases as Altitude increases above sea level. Weather systems and ambient temperature also affect barometric pressures. Consequently, depth reading instruments that do not compensate for the decrease in ambient pressure indicate depth readings shallower than the depth they are actually at. The Profile automatically compensates for decreased ambient pressures for Altitudes between 3,001 feet (916 meters) and 14,000 feet (4,270 meters). It's program reduces No Deco and O2 limits to add a larger zone of caution.

The Profile senses ambient pressure when it is manually activated, every 15 minutes while it is activated, or every 30 minutes when it is not activated. Beginning at 3,001 feet (916 meters), then at additional intervals of 1,000 feet (305 meters), it will automatically recalibrate depth measurements and the No Deco and O2 limits. When returning to lower Altitudes, diving should not be conducted until the unit automatically clears of any residual nitrogen and oxygen loading and resets to operate at the new lower Altitude.

WARNING: Diving at high altitude requires special knowledge of the variations imposed upon divers, their activities, and their equipment by the decrease in atmospheric 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.

65 FLYING AFTER DIVING In 1990 the Undersea and Hyperbaric Medical Society (UHMS) published a set of guidelines aimed at minimizing the possibility of decompression sickness due to flying too soon after diving. The UHMS suggests* that divers using standard air cylinders and exhibiting no symptoms of decompression sickness wait 24 hours after their last dive to fly in aircraft with cabin pressures up to 8,000 feet. (2,440 meters). * excerpted from “The UHMS Flying After Diving Workshop” The two exceptions to UHMS's recommendation are: • If a diver had less than 2 hours total accumulated dive time in the last 48 hours, then a 12 hour surface interval before flying is recommended. • Following any dive that required a decompression stop, flying should be delayed for at least 24 hours, and if possible, for 48 hours.

Since the 1990 UHMS guidelines were introduced, data from the Diver’s Alert Network (DAN) was introduced that resulted in DAN’s position** that “A minimum surface interval of only 12 hours would be required in order to be reasonably assured a diver will remain symptom free upon ascent to altitude in a commercial jet airliner (altitude up to 8,000 feet/2,440 meters). Divers who plan to make daily, multiple dives for several days, or make dives that require decompression stops, should take special pre- cautions and wait for an extended surface interval beyond 12 hours before flight”.

Both the UHMS and DAN agree that “There can never be a flying after diving rule that is guaranteed to prevent decompression sickness completely. Rather, there can be a guideline that represents the best estimate for a conservative . . . surface interval for the vast majority of divers. There will always be an occasional diver whose physiological makeup or special diving circumstances will result in the bends”. ** excerpted from “DAN’s Position on Recreational Flying After Diving”

66 Profile NITROX DIVING Both central nervous system (CNS) oxygen toxicity and pulmonary oxygen toxicity were taken into consideration when the maximum durations (see chart) for a Single Exposure and for Any 24 Hour Day were published by in the October 1991 NOAA Diving Manual. Although CNS oxygen toxicity is considered the primary constraint for higher levels of partial pressure of oxygen (PO2), there are circumstances in which pulmonary oxygen toxicity can limit exposures.

CNS oxygen toxicity is not considered likely at PO2 levels below 1.30 ATA. It is, however, related to diver's work level. Performing strenuous tasks could cause the symptoms of O2 poisoning at PO2 levels lower than they normally would appear during casual diving.

WARNING: In the event that you exceed the maximum limit of per dive Maximum allowable O2, it is recommended that you allow at least 2 hours at a Exposure Time normoxic PO2 before diving again. If you have reached the Maximum Total 24 hour Day Limits, you must spend at least 12 hours at a normoxic PO2 Per Dive Per 24 hr PO2 before diving again (you should allow a surface interval of at least 24 (ATA) (Min) (Min) hours before reentering the water). 0.60 720 720 0.70 570 570 0.80 450 450 0.90 360 360 WARNING: Diving with Nitrox mixtures requires special knowledge of the 1.00 300 300 variations imposed upon divers, their activities, and their equipment by the 1.10 240 270 1.20 210 240 increased percentage of O2. Sherwood Scuba recommends completion of 1.30 180 210 1.40 150 180 a specialized Nitrox training course by a recognized training agency prior 1.50 120 180 to diving with any Nitrox mixtures. 1.60 45 150 NOAA O2 Limits 67 MULTIPLE TISSUE TRACKING The Profile tracks 12 tissue compartments with halftimes ranging from 5 to 480 minutes. The N2BG always displays the controlling compartment that is the only one important at that time.

Think of the N2BG as transparent displays laid on top of one another. The tissue compartment that has filled up fastest is the only one that can be seen from the top.

At any particular point, one tissue compartment may be absorbing nitrogen, while another that was previously higher may be off gassing. One compartment hands over control to another compartment at a different depth. This feature of the Decompression Model is the basis of multilevel diving, one of the most important contributions the Profile offers you. Take advantage of this feature and make all of your dives multilevel dives.

REPETITIVE DECOMPRESSION DIVING The decompression model used by the Profile is based on the no decompression multilevel repetitive dive schedules successfully tested by Dr. Ray Rogers and Dr. Michael Powell.

These tests did not include repetitive dives deeper than 90 FT (27 M) or decompression dives.

Due to the present unavailability of statistical data, the Resource Pro's decompression predictions are based on U.S. Navy theory. Therefore, pay special attention to the following warnings.

68 Profile WARNINGS: The decompression capabilities of the Profile are intended for emergency use. Decompression diving is inherently hazardous and greatly increases your risk of decompression sickness, even when performed according to the computer's calculations. In the event that you must make an emergency decompression, you must not make another dive for at least 24 hours.

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.”

Sherwood Scuba advocates responsible diving practices and does not Profile U.S.N. recommend decompression diving, or diving below 130 FT (39 M). Depth NDL-mins. NDL FT (M) Eng (Metric) mins. 30 (9) 260 (283) - - - NO DECOMPRESSION LIMITS (NDLS) 35 - - - 310 40 (12) 137 (144) 200 Note how the NDLs for the Profile compare with the U.S. Navy limits (see chart). For most depths, 50 (15) 81 (85) 100 60 (18) 57 (59) 60 the Profile provides somewhat less times than the U.S. Navy Tables. However, while the No De- 70 (21) 40 (41) 50 compression Limits may be less, you will receive increased allowable Dive Times as you take ad- 80 (24) 30 (32) 40 90 (27) 24 (25) 30 vantage of the multilevel dive capabilities offered by the Profile. 100 (30) 19 (20) 25 110 (33) 16 (17) 20 120 (36) 13 (14) 15 CONCLUSION 130 (39) 11 (11) 10 140 (42) 9 (9) 10 The Profile is an informational tool whose entire worth depends on using it correctly. Learn how to 150 (45) 8 (8) 5 160 (48) 7 (7) 5 use it and use it wisely. Have fun with the Profile, and thank you for being a responsible diver! 170 (51) 7 (6) 5 180 (54) 6 (6) 5 190 (57) 5 (5) - - -

NDL Comparison 69 NDLS (HR:MIN) AT ALTITUDE (DSAT BASED IMPERIAL)

Altitude 0 3001 4001 5001 6001 7001 8001 9001 10001 11001 12001 13001 (feet) to to to to to to to to to to to to 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 Depth (FT) 30 4:20 3:21 3:07 2:55 2:45 2:36 2:28 2:21 2:15 2:10 2:04 1:58 40 2:17 1:43 1:36 1:30 1:25 1:20 1:16 1:12 1:09 1:06 1:03 1:01 50 1:21 1:03 1:00 0:58 0:55 0:52 0:48 0:45 0:43 0:41 0:39 0:37 60 0:57 0:43 0:40 0:38 0:36 0:34 0:33 0:31 0:30 0:29 0:28 0:27 70 0:40 0:31 0:30 0:28 0:27 0:26 0:24 0:23 0:22 0:20 0:19 0:18 80 0:30 0:24 0:23 0:21 0:20 0:19 0:18 0:17 0:16 0:16 0:14 0:13 90 0:24 0:19 0:18 0:17 0:16 0:15 0:14 0:13 0:12 0:11 0:10 0:10 100 0:19 0:15 0:14 0:13 0:12 0:11 0:10 0:10 0:09 0:09 0:08 0:08 110 0:16 0:12 0:11 0:10 0:09 0:09 0:08 0:08 0:08 0:07 0:07 0:07 120 0:13 0:09 0:09 0:08 0:08 0:08 0:07 0:07 0:07 0:06 0:06 0:06 130 0:11 0:08 0:08 0:07 0:07 0:07 0:06 0:06 0:06 0:06 0:05 0:05 140 0:09 0:07 0:07 0:06 0:06 0:06 0:06 0:05 0:05 0:05 0:05 0:05 150 0:08 0:06 0:06 0:06 0:05 0:05 0:05 0:05 0:05 0:04 0:04 0:04 160 0:07 0:06 0:05 0:05 0:05 0:05 0:05 0:04 0:04 0:04 0:04 0:04 170 0:07 0:05 0:05 0:05 0:04 0:04 0:04 0:04 0:04 0:04 0:04 0:03 180 0:06 0:05 0:05 0:04 0:04 0:04 0:04 0:04 0:04 0:03 0:03 0:03 190 0:05 0:04 0:04 0:04 0:04 0:04 0:04 0:03 0:03 0:03 0:03 0:03

70 Profile

NDLS (HR:MIN) AT ALTITUDE (DSAT BASED METRIC)

Altitude 0 916 1221 1526 1831 2136 2441 2746 3051 3356 3661 3966 (meters) to to to to to to to to to to to to 915 1220 1525 1830 2135 2440 2745 3050 3355 3660 3965 4270 Depth (M) 9 4:43 3:37 3:24 3:10 2:58 2:48 2:39 2:31 2:24 2:18 2:12 2:07 12 2:24 1:52 1:44 1:37 1:30 1:25 1:21 1:17 1:13 1:10 1:07 1:04 15 1:25 1:06 1:03 1:00 0:57 0:55 0:52 0:49 0:46 0:43 0:41 0:39 18 0:59 0:45 0:42 0:40 0:38 0:36 0:34 0:32 0:31 0:30 0:29 0:28 21 0:41 0:33 0:31 0:29 0:28 0:27 0:26 0:24 0:23 0:21 0:20 0:19 24 0:32 0:26 0:24 0:22 0:21 0:20 0:19 0:18 0:17 0:16 0:15 0:14 27 0:25 0:19 0:18 0:17 0:16 0:16 0:14 0:13 0:12 0:12 0:11 0:10 30 0:20 0:16 0:15 0:13 0:12 0:12 0:11 0:10 0:10 0:09 0:09 0:08 33 0:17 0:12 0:11 0:11 0:10 0:09 0:09 0:08 0:08 0:08 0:07 0:07 36 0:14 0:10 0:09 0:09 0:08 0:08 0:07 0:07 0:07 0:06 0:06 0:06 39 0:11 0:08 0:08 0:07 0:07 0:07 0:06 0:06 0:06 0:06 0:05 0:05 42 0:09 0:07 0:07 0:07 0:06 0:06 0:06 0:05 0:05 0:05 0:05 0:05 45 0:08 0:06 0:06 0:06 0:06 0:05 0:05 0:05 0:05 0:05 0:04 0:04 48 0:07 0:06 0:06 0:05 0:05 0:05 0:05 0:04 0:04 0:04 0:04 0:04 51 0:06 0:05 0:05 0:05 0:05 0:04 0:04 0:04 0:04 0:04 0:04 0:04 54 0:06 0:05 0:05 0:04 0:04 0:04 0:04 0:04 0:04 0:03 0:03 0:03 57 0:05 0:04 0:04 0:04 0:04 0:04 0:04 0:03 0:03 0:03 0:03 0:03

71 SPECIFICATIONS

NO DECOMPRESSION MODEL OPERATIONAL MODES Basis: • Modified Haldanean Algorithm • Activation >> Diagnostic >> SN • 12 tissue compartments • Surface Main >> Fly/Desat >> Plan

Data Base: • Log >> Clear • Diving Science and Technology (DSAT) - Rogers/Powell • Set - >> PO2 Alarm Performance: >> FO2 • Tissue compartment halftimes (in mins.) Spencer’s “M” values >> FO2 Default 5, 10, 20, 40, 80, 120, 160, 200, 240, 320, 400, 480 >> Wet Activation • Reciprocal subsurface elimination >> Units • 60 minute surface credit control for compartments faster than >> Hour Format 60 minutes >> Time of Day • Tissue compartments tracked up to 24 hours after last dive >> Deep Stop • No Deco Dive Decompression Capabilities: • No Deco Deep Stop • Decompression stop depths at 10, 20, 30, 40, 50, & 60 FT • No Deco Safety Stop (3, 6, 9, 12, 15, & 18 M) • Decompression • Conditional Violation Altitude Algorithm: • Delayed Violation (1, 2, 3) • Based on NOAA tables • Violation Gauge Mode • High PO2 • High O2 Oxygen Exposure Limits: • Based on NOAA tables

72 Profile SPECIFICATIONS (continued)

DISPLAY RANGE/RESOLUTION BAR GRAPHS

Numeric Displays: Range: Resolution: N2BG: segments • Dive Number 0 - 50 1 • No Deco up to 4 displayed • Depth 0 - 330 FT (0 - 99.9 M) 1 FT (.1 M) • Deco all 5 displayed • Maximum Depth 330 FT (99.9 M) 1 FT (.1 M) • Dive Time Remaining 0 - 599 (min) 1 min O2BG: segments • Deep Stop Time 0 - 2:00 (min:sec) 1 sec • Normal up to 4 displayed • Safety Stop Time 0 - 3:00 (min:sec) 1 sec • Danger all 5 displayed • Total Ascent Time 0 - 599 (min) 1 min • Deco Stop Time 0 - 9:59 (min per depth) 1 min ASC: • Elapsed Dive Time 0 - 9:59 (hr:min) 1 min <= 60 FT (18 M) segments • Surface Time 0 - 23:59 (hr:min) 1 min 0 - 10 FPM (0 - 3 MPM) 0 • Dive Log Surface Interval 0 - 23:59 (hr:min) 1 min 11 - 25 FPM (3.5 - 7.5 MPM) 1 • Time to Fly 0 - 23:50 (hr:min)* 1 min 26 - 30 FPM (8 - 9 MPM) 2 (* starting 10 min. after the dive) > 30 FPM (9 MPM) 3 (all flashing) • Time to Desaturate 0 - 23:50 (hr:min)* 1 min (* starting 10 min. after the dive) > 60 FT (18 M) segments • PO2 Value :00 - 5:00 (ATA) :01 ATA 0 - 20 FPM (0 - 6 MPM) 0 • FO2 Value Air, 21 - 50 (%) 1 % 21 - 50 FPM (6.5 - 15 MPM) 1 51 - 60 FPM (15.5 - 18 MPM) 2 Special Displays: Occurrence > 60 FPM (18 MPM) 3 (all flashing) • Diagnostic Display Activation • Out of Range (- - -) > 330 FT (99.9 M) • Gauge Mode Countdown 24:00 - 0:00 hr:min (after Violation) • Clear (reset) Intentional operation

73 SPECIFICATIONS (continued)

OPERATIONAL PERFORMANCE

Function: Accuracy: Activation: • Depth ±1% of full scale • Manual - push button (recommended) • Timers 1 second per day • Automatic - by wet contacts (if set On) • Cannot be activated deeper than 5 FT (1.5 M) - if Wet Activation is Dive Counter: set Off • Displays Dives #1 to 50 • Cannot be activated at elevations higher than 14,000 feet (4,270 m) • Displays #1 for 51st dive of an activation period • Resets to Dive #1 upon reactivation Shutoff: • Automatically shuts off if no dive is made within 2 hours after initial Dive Log Mode: activation. • Stores 50 most recent dives in memory for viewing • Automatically shuts off 24 hours after the last dive (will reactivate • After 50 dives, the 51st dive is added, overwriting the oldest if the Wet Activation feature is set On and the contacts are wet). • Cannot be shut off manually. Altitude: • Operational to 14,000 feet (4,270 meters) elevation SETTING FO2 • Sampling of ambient pressure every 30/15 minutes • Automatically set for AIR upon activation • Recalibration of depth readings at 1,000 feet (305 m) intervals begin- • Remains set for AIR unless an FO2 numerical value is set ning at 3,001 feet (916 m) elevation • Nitrox Set Points from 21 to 50 (%) • If set for 21%, remains set for 21% until changed Power: • If set for >21%, reverts to 50% 10 minutes after the dive (if the • Battery (1) 3 volt CR2450, Lithium FO2 50% Default is set On). The previous FO2 value set will be • Shelf life Up to 5 years retained, if the FO2 50% Default is set Off. • Replacement User replaceable, yearly is recommended • Life expectancy 150 dive hr, if (1) 1 hr dive per activation period 300 dive hr, if (2) or more 1 hr dives per period

74 Profile GLOSSARY

Air Dive - A dive conducted using AIR (approximately 21% oxygen & 79% nitrogen) as the breathing gas. Algorithm - A step-by-step mathematical formula designed to accomplish a particular result (i.e. Dive Time Remaining in the Profile). Altitude Dive - A dive made at an elevation above sea level (> 3,000 feet) where no decompression limits are adjusted. Ascent Rate - The speed that a diver ascends toward the surface. Ascent Rate Indicator - A graphic representation of vertical ascent rate (speed) displayed alongside a color coded indicator. Boot - A protective rubber covering that surrounds an instrument module. Caution Zone - The section of a bar graph that gives visual warning of a diver’s proximity to projected limits. Clean Dive - A dive preceded by 24 hours of no diving activity. Competitive Dive - A dive conducted for profit or prize. Compartment - A term applied to the hypothetical modeling of nitrogen absorption in the tissues (more accurate than the term “tissue” because dive computer models have no direct relation to human tissues). CNS - Abbreviation for the Central Nervous System of the body. DCS - Abbreviation for decompression sickness (i.e., the bends). DECO - Abbreviation for Decompression. Decompression Ceiling - The shallowest depth a diver may reach upon ascent without risking DCS. Decompression Stop - The depth(s) at which a diver must pause during ascent to allow absorbed nitrogen to escape naturally from the tissues. Deep Stop - A depth at which a diver may choose, but is not required, to pause during ascent to reduce the risk of DCS. Depth Sensor - An electromechanical device that converts water pressure into an electrical signal, that is converted to a visual depth display. Diagnostic Mode - The first display seen on Sherwood Scuba dive computers after initial activation during which time a self check for internal faults and battery voltage is performed. Display - A visual readout of information. Dive Time - The total time spent underwater during a dive between 5 FT (1.5 M) on initial descent to 2 FT (0.6 M) on final ascent. Dive Time Remaining - A display of time allowed before a diver must surface based on decompression status. FO2 - The fraction (percent / 100) of oxygen (O2) in the breathing gas mixture. Hydroglow - A Sherwood Scuba term for an instrument backlight feature. LCD - Abbreviation for liquid crystal display, an easily viewed low voltage display usually found on dive computers Log Mode - A computer display of previous dive information.

75 GLOSSARY (continued)

Maximum Depth - The deepest depth attained during a dive. Mode - A specific set of functions in a dive computer. Multi-level Dive - A type of dive profile where the diver spends various times at different shallower depths (opposite of a “Square Wave” dive profile). NDL - Abbreviation for No Decompression Limit. Nitrogen Bar Graph - A graphic display of simulated nitrogen absorption. Nitrox - A nitrogen oxygen breathing gas mixture that contains a higher fraction of oxygen than air. Nitrox Dive - A dive conducted using nitrox (22 to 50% O2) as the breathing gas. No Decompression - Any part of a dive where the diver can surface without requiring a decompression stop. No Decompression Limit - The amount of dive time remaining based on no decompression status. O2SAT - Abbreviation for oxygen saturation. Out of Range - The depth beyond which a dive computer can no longer supply correct dive information. Oxygen Toxicity - The adverse physiological affects of exposure to elevated levels of oxygen. Partial Pressure - The proportion of the total pressure contributed by a single gas in a mixture of gases. Plan Mode - An accessible sequential display of allowed dive times at 10 FT (3 M) intervals from 30 to 190 FT (9 to 57 M) used when dive planning. PO2 - Partial pressure of oxygen. The proportion of total pressure of a gas mixture contributed by oxygen. Repetitive Dive - Any dive that takes place within 12 hours of a previous dive. Safety Stop - A depth at which a diver may choose, but is not required, to pause during ascent to allow absorbed nitrogen to escape naturally from the tissues. Square Wave Dive - A type of dive profile where the entire dive is spent at one depth between descent and ascent. Symbol - a small pictorial representation of an operational mode or informational display. Tissue - See Compartment. Tissue Compartment - See Compartment. Transducer - An electro mechanical component in a dive computer that acts as a depth or pressure sensor. Transition Period - The first 10 minutes of surface time after ascending to 2 FT (0.6 M).

76 Profile NOTES

77 INSPECTION / SERVICE RECORD

SERIAL NUMBER

R R E DATE OF PURCHASE S E V P I O D NSIBLE PURCHASED FROM (DEALER)

BELOW TO BE FILLED IN BY AN AUTHORIZED SHERWOOD SCUBA DEALER:

DATE INSPECTION / SERVICE PERFORMED DEALER / TECHNICIAN