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Sherwood Scuba Profile Manual

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  • Page 3 Profile FULL LCD DISPLAY KEY: Control button N2/O2 Bar Graph (shared use) ASC (Ascent Rate) Bar Graph Low Battery symbol Descend (Down Arrow) symbol Ascend (Up Arrow) symbol...
  • Page 4 Before you dive using your Profile, keep these basic rules in mind: • Plan each dive, and dive your plan - Your Profile was not designed to make decisions for you, only to provide you with the in- formation you need to make responsible decisions for yourself. This begins with a dive plan that will help you avoid a low air or decompression situation.
  • Page 5 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.
  • Page 6 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.

  • Page 7: Table Of Contents

    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 ...............................
  • Page 8 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 ..........................
  • Page 9 Profile CONTENTS (CONTINUED) CARE, INSPECTION, and SERVICE ......................53 Care and Cleaning ............................54 Annual Inspections and Service ........................55 Battery Life ..............................56 Low Battery Condition ..........................56 Battery Replacement Procedures ........................ 57 REFERENCE ..............................63 Dive Time Remaining ............................. 64 Altitude ................................
  • Page 10 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, 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.

  • Page 11: Features And Displays

    Profile FEATURES and DISPLAYS...
  • Page 12 As you use the Profile, remember that the rules you learned in your SCUBA course(s) still apply to the diving you will do while using a dive computer - some will become even more important. Technology is no substitute for common sense, and a dive com-...

  • Page 13: Control Button

    During the Dive modes, the button may be used to activate the display's Backlight and view Alter- nate displays of information The Profile uses easy to understand alpha/numeric displays and graphic icons (Fig. 1). It is impera- tive that you understand the formats, ranges, and values of the information presented by the nu- meric and graphic displays to avoid any possible misunderstanding that could result in an error.

  • Page 14: Ascent Rate Indicator

    9.5-12 41-50 12.5-15 51-60 15.5-18 When the Profile is set to operate in Nitrox mode, the Bar Graph will represent Oxygen accumula- >60 >18 tion when the O2 data screen (Alternate Display) is accessed. 60 FT (18 M) & Shallower...

  • Page 15: Informational Displays

    Profile INFORMATIONAL DISPLAYS Each numeric and graphic display represents a unique piece of information. It is imperative that you understand the formats, ranges, and values of the information represented to avoid any pos- sible misunderstanding that could result in error.

  • Page 16: Backlight

    POWER SUPPLY 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.

  • Page 17: Operating Temperature

    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 ex- tremely low temperature areas (below freezing), warm the unit and battery with body heat before diving.
  • Page 18 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.

  • Page 19: Activation And Setup

    Profile ACTIVATION and SETUP...

  • Page 20: Push Button Activation

    PUSH BUTTON ACTIVATION To activate the Profile, press/release the button. It will immediately enter Diagnostic Mode, dis- playing all 8s (Fig. 6), followed by dashes, then a countdown from 9 to 0. Note that 2 of the digits do not contain an upper/left segment (Fig. 6a/b).

  • Page 21: Water Contact Activation

    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 baromet- ric 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.

  • Page 22: Surface Sequence

    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.

  • Page 23: Set Mode

    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.

  • Page 24: Set 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.

  • Page 25: Set Fo2 50% Default

    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 >...

  • Page 26: Set Units Of Measure

    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. >...

  • Page 27: Set Time

    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) - •...
  • Page 28 • 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.

  • Page 29: Pre Dive And Dive Modes

    Profile PRE DIVE and DIVE MODES...

  • Page 30: Button Use

    During dives, depress the button for 2 seconds to activate the Backlight that will illuminate the display for 10 seconds. 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 com- puter 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 %).

  • Page 31: Use With Nitrox

    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 un- til it automatically turns Off and is reactivated.

  • Page 32: Pre Dive Plan Mode

    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) Mode prior to every dive to help you plan your dive as required to avoid 60 (18) (:59)

  • Page 33: No Deco Dive Mode

    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 •...

  • Page 34: No Deco Deep Stop

    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 •...
  • Page 35 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.

  • Page 36: No Deco Safety Stop

    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).

  • Page 37: Post Dive Modes

    Profile POST DIVE MODES...

  • Page 38: Post Dive Surface Mode

    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.

  • Page 39: After The Transition Period (The First 2 Hours)

    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)

  • Page 40: Post Dive Plan Mode

    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 cal- culated dive times and the maximum allowed depth displayed will increase as the real time Surface Interval increases after completion of a dive.
  • Page 41 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) •...

  • Page 42: After The First 2 Hours

    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 •...

  • Page 43: Special Situations

    Profile SPECIAL SITUATIONS...

  • Page 44: Clear (Reset)

    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.

  • Page 45: High Po2

    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).

  • Page 46: High O2

    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. •...

  • Page 47: Decompression

    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).

  • Page 48: Conditional Violation

    CONDITIONAL VIOLATION (CV) If you disregard a Decompression obligation (i.e., ascend above the Required Stop Depth), opera- tion 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 de- scend below the Required Stop Depth, operation continues in Decompression Mode, otherwise it enters Delayed Violation Mode indicated by the entire N2BG flashing.

  • Page 49: Delayed Violation 1, 2, 3

    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 >>...

  • Page 50: Violation Gauge Mode

    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 (- - -).
  • Page 51 Profile VGM on Surface On the surface, the graphic VIOL will be displayed for the first 5 minutes (Fig. 44A), then it will al- ternate with the Dive No (or graphic WET) with other screen information (Temperature, SI, Time of Day) displayed as it normally would be.
  • Page 52 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.

  • Page 53: Care, Inspection, And Service

    Profile CARE, INSPECTION, and SERVICE...

  • Page 54: Care And Cleaning

    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.

  • Page 55: Annual Inspections And Service

    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 un- derwater when being pressure tested to protect the Depth Sensor.

  • Page 56: Battery Life

    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.

  • Page 57: Battery Replacement Procedures

    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.
  • Page 58 • 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.
  • Page 59 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.
  • Page 60 (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.
  • Page 61 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.
  • Page 62 Pins (and side Wet Activation Contact) to water upon immersion. WARNING: If the Profile is installed in a Boot that does not have the side opening where the side Wet Activation Contact is located, the...

  • Page 63: Reference

    Profile REFERENCE...

  • Page 64: Dive Time Remaining

    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.

  • Page 65: Altitude

    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 auto- matically recalibrate depth measurements and the No Deco and O2 limits.

  • Page 66: Flying After Diving

    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.

  • Page 67: Nitrox Diving

    WARNING: Diving with Nitrox mixtures requires special knowledge of the 1.00 variations imposed upon divers, their activities, and their equipment by the 1.10 1.20 increased percentage of O2. Sherwood Scuba recommends completion of 1.30 1.40 a specialized Nitrox training course by a recognized training agency prior 1.50 to diving with any Nitrox mixtures.

  • Page 68: Multiple Tissue Tracking

    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.

  • Page 69: No Decompression Limits

    The Profile is an informational tool whose entire worth depends on using it correctly. Learn how to 150 (45) 8 (8) 160 (48) 7 (7) use it and use it wisely. Have fun with the Profile, and thank you for being a responsible diver! 170 (51) 7 (6) 180 (54) 6 (6)
  • Page 70 NDLS (HR:MIN) AT ALTITUDE (DSAT BASED IMPERIAL) Altitude 0 3001 4001 5001 6001 7001 8001 9001 10001 11001 12001 13001 (feet) 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 Depth (FT) 4:20 3:21 3:07 2:55 2:45 2:36 2:28 2:21...
  • Page 71 Profile NDLS (HR:MIN) AT ALTITUDE (DSAT BASED METRIC) Altitude 1221 1526 1831 2136 2441 2746 3051 3356 3661 3966 (meters) to 1220 1525 1830 2135 2440 2745 3050 3355 3660 3965 4270 Depth 4:43 3:37 3:24 3:10 2:58 2:48 2:39...

  • Page 72: Specifications

    SPECIFICATIONS NO DECOMPRESSION MODEL OPERATIONAL MODES Basis: • Modified Haldanean Algorithm • Activation >> Diagnostic >> SN • 12 tissue compartments • Surface Main >> Fly/Desat >> Plan • Log >> Clear Data Base: • Set - • Diving Science and Technology (DSAT) - Rogers/Powell >>...
  • Page 73 Profile SPECIFICATIONS (continued) DISPLAY RANGE/RESOLUTION BAR GRAPHS Numeric Displays: Range: Resolution: N2BG: segments • Dive Number 0 - 50 • No Deco up to 4 displayed • Depth 0 - 330 FT (0 - 99.9 M) 1 FT (.1 M) •...
  • Page 74 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 •...

  • Page 75: Glossary

    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.
  • Page 76 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).
  • Page 77 Profile NOTES...

  • Page 78: Inspection / Service Record

    INSPECTION / SERVICE RECORD SERIAL NUMBER DATE OF PURCHASE PURCHASED FROM (DEALER) BELOW TO BE FILLED IN BY AN AUTHORIZED SHERWOOD SCUBA DEALER: DATE INSPECTION / SERVICE PERFORMED DEALER / TECHNICIAN...

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