Related Manuals for Sherwood Scuba LOGIC
Summary of Contents for Sherwood Scuba LOGIC
- Page 1 L O G I C D I V E C O M P U T E R OWNER’S MANUAL COPYRIGHT SHERWOOD SCUBA FIRMWARE VERSION SH1018 MANUAL - V1.4_09.20.2024 SherwoodScuba.com SherwoodScuba.com SherwoodScuba.com...
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Page 2: Basic Considerations
Authorized Sherwood Scuba Dealer before you diagram. utilize this product. • The LOGIC is intended for use by recreational Information located where divers who have successfully completed a would expect it to be. -
Page 3: Responsible Computer Diving
• Allow Adequate Surface Interval Between Each made to the term ‘breathing gas’. The rationale Dive being that the LOGIC can be used for Air dives or • Allow Adequate Surface Interval Between Each Nitrox dives. These terms are defined as -... -
Page 4: Features And Displays
BUTTONS LAYOUT FEATURES AND DISPLAYS The LOGIC’ s two Control Buttons allows you to activate the unit and access specific information when you choose to see it. While on the surface, you can use the buttons to maneuver through the LOGIC’ s unique Menu System that allows - •... - Page 5 21 - 50 6.5 - 15 51 - 60 15.5 - 18 When the LOGIC is set to operate in Nitrox mode, the > 60 > 18 Bar Graph will represent Oxygen accumulation when the O2 data screen (Alternate Display) is accessed temporarily.
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Page 6: Informational Displays
Display which can be accessed during dives as well by pressing the S (Right) button once while underwater. The MODE the LOGIC is on will be displayed at the bottom of the screen (Air, Nitrox or Gauge will be displayed here. (c) -
Page 7: Audible Alarm
AUDIBLE ALARM When Reminder Alarm situations activate the Reminder Alarm situations include - Alarm, the unit will emit a quick double beep • PO2 equal to or greater than 1.60 ATA, or the Max each second for 10 seconds, or until the situation PO2 Alarm setting. - Page 8 POWER SUPPLY - • If the unit did not display the Low Battery icon The LOGIC utilizes one (1) 3 volt, CR2450 Lithium ‘prior to’ entering the Dive Mode, and a Low Battery that should provide from 300 dive hours...
- Page 9 SET 6 - DEL - Deletes Logbook/ Diving Information NOTE : If the LOGIC is not showing the TIME screen at the beginning of the dive it will not go into DIVE MODE as the diver descends.
- Page 10 SURFACE SCREENS & BASIC SETTINGS SET 1 - MODE SET DEPTH ALARM ON/OFF - Factory set ON, the DEPTH ALARM can also be Toggles between Air, Nitrox or set OFF. When set OFF, the Alarm will not sound Gauge modes. The Air mode will when Depth increases toward 330 ft (120 m).
- Page 11 SURFACE SCREENS & BASIC SETTINGS SET 3 - UNITS SET 3 - UNITS Change the computer units Metric/Imperial, Sampling Rate 15 sec, 30 sec, 60 sec and Deep Stop alarm on or off. Use the S button to view the different options, the A button to select values, and press the A button again to accept the selection &...
- Page 12 SET 5 - DIVE Set 5 contains additional items regarding control when accounting nitrogen absorption/ releases start, when the computer starts imputing dive information into a new log the Conservative Factor CF. & type of water the dive is going to take place.
- Page 13 Set 5 - CONS – CF Set 5 - TYPE – SALt - FrESH Conservative factor is a setting This is the type of water the dive is designed to slightly “tweak” the going to be performed under algorithm to give users some Fresh Water or Salt Water.
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Page 14: Plan Mode
SURFACE SCREENS & BASIC SETTINGS PLAN MODE AIR MODE PLAN • Alpha graphic PLAN • Air graphic (indicating operating mode) The PLAN screens are accessible • No Deco Limit (hr:min) with DIVE TIME icons, 3 during a new activation period dashes if no time available or greater than 10 minutes after •... - Page 15 SURFACE SCREENS & BASIC SETTINGS LAST - DIVE SCREENS LOG MODE The LAST Main screen is accessible by pressing Log Mode stores information the A (Left) button 3 times while the TIME screen for each dive as 3 screens is being displayed (TIME >> DATA >> PLAN >> referred to as the Date Screen, LAST).
- Page 16 SURFACE SCREENS & BASIC SETTINGS LOG SCREEN #1 (SCR1) HISTORY MODE • Alpha graphic SCR1 HISTORY records information • Temperature (minimum recorded that dive) with for up to 999 Total Dives and degrees icon and graphic F (or C) 2999 Dive Hours, and retains •...
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Page 17: Dive Modes
DIVE MODES TYPICAL DISPLAY INFORMATION DIVE DEPTH TIME NITROGEN ASCENT BUILDUP SPEED CURRENT DEPTH MINUTES SAFETY STOP REQUIRED COUNTDOWN DEPTH 3:00 MIN CURRENT DEPTH MINUTES NO FLY DIVE REQUIRED *NO DIVE TIME TIME *If DECO Stop has been violated SherwoodScuba.com... - Page 18 DIVE MODES NO DECO ALT 1 - During Dive Modes, a Main (Default) screen of information relevant to that Dive Mode is displayed. Information displayed includes: • Temperature with ° icon and graphic F (or C) During No Deco dives deeper than 80 ft (24 m), •...
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Page 19: No Deco Deep Stop
DIVE MODES NO DECO DEEP STOP - Upon ascending to within 10 ft (3 m) below the During No Deco dives in which Depth exceeds calculated Deep Stop, a Deep Stop (DS) Main 80 ft (24 m), a Deep Stop Preview screen can screen will automatically appear with the alpha be accessed that will revert to the No Deco Main graphics DEEP and STOP scrolling at the top of... - Page 20 DIVE MODES NO DECO SAFETY STOP - The graphic message SAFE >> STOP >> 15 ft (6 Upon ascending to 15 ft (5 m) on any No m) continues to scroll while the ALT screens are Decompression dive in which Depth exceeded displayed.
- Page 21 DIVE MODES HIGH PO2 - HIGH O₂ - Upon reaching .20 ATA less than the PO2 Alarm A cautionary mode is entered when O₂ increases Set Point, a cautionary mode is entered. The to 80% (240 OTU) of the Maximum allowed for a graphic UP, Up Arrow icon, and PO2 value (x.xx single dive or 24 hour period (100% or 300 OTU).
- Page 22 DIVE MODES DECOMPRESSION DIVE MODE - CONDITIONAL VIOLATION (CV) - Decompression Dive Mode (DECO) is entered If you disregard a Decompression obligation when nitrogen calculations determine that you (i.e., ascend above the Required Stop Depth), cannot safely surface without stopping at a operation enters Conditional Violation Mode.
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Page 23: Violation Gauge Mode (Vgm)
DIVE MODES DELAYED VIOLATION # 1 (DV1) - VIOLATION GAUGE MODE (VGM) - DV1 is a continuation of CV which occurs if you When a Decompression Stop Depth greater than remain above the Stop Depth for longer than 70 ft (21 meters) is required, operation enters VGM 5 minutes. -
Page 24: Care And Maintenance
CLEANING WARNING : If you are unsure how to properly Soak and rinse the LOGIC in fresh water following replace the LOGIC’ s battery and ensure the O-ring each day of diving, preferably after each dive, and is well lubricated and the battery hatch secured... -
Page 25: Annual Inspections And Service
You will be alerted erroneous depth or time readings. by the Battery symbol. It is possible to damage the LOGIC Depth Sensor if CAUTION : Sherwood Scuba strongly it is not pressure tested properly. The LOGIC must... -
Page 26: Battery Replacement Procedures
BATTERY REPLACEMENT PROCEDURES MODULE REMOVAL FROM BOOT BATTERY REPLACEMENT If the LOGIC is in a Wrist Boot, it will be necessary The Battery Compartment should only be opened to peel the lips of the Boot downward off the in a dry and clean environment with extreme care Module while applying pressure from underneath, taken to prevent the entrance of moisture or dust. -
Page 27: Battery Removal
WARNING : If damage or corrosion is found in the Battery Compartment, return your LOGIC to an Authorized Sherwood Scuba Dealer, and DO NOT attempt to use it until it has received factory prescribed service. -
Page 28: Battery Installation
If the condition persist internationally recognized training agencies. then return your LOGIC to an Authorized Sherwood Scuba Dealer for a complete • The LOGIC is not intended for use by military or evaluation before attempting to use it. commercial divers. SherwoodScuba.com... -
Page 29: Decompression Model
LOGIC are contrasted with the U.S. Navy limits. Sherwood Scuba recommends completion of a The LOGIC’s Dive Planner does not scroll past 190 specialized Nitrox training course by a recognized ft (57 m), or to depths at which projected dive training agency prior to diving with any enriched time is less than one minute. -
Page 30: Altitude Diving
- - - of caution. 40 (12) 137 (144) The LOGIC senses ambient pressure when it is 50 (15) 81 (85) activated, every 15 minutes while it is activated, 60 (18) 57 (59) or every 30 minutes when it is not activated. -
Page 31: Flying After Diving
One of the most important pieces of information stop, flying should be delayed for at least 24 on the LOGIC is the patented DTR numeric display. hours, and if possible, for 48 hours. To numerically display Dive Time Remaining, the LOGIC constantly monitors two critical pieces * Excerpted from “The UHMS Flying After Diving Workshop”... -
Page 32: Specifications
• Set 1 (Modes/Basics): advantages the LOGIC offers. - Operating Mode (Air, Nitrox, Gauge) - PO2 Alarm Value (1.20 to 1.60 ATA) Sherwood Scuba Decompression Algorithm uses... - Page 33 REFERENCE DIVE MODES • No Decompression Dive: • Main display • Alternate #1 • Alternate # 2 (if Nitrox) • Deep Stop Preview (if On) • Deep Stop (if On) • Safety Stop • Decompression • Violation - Conditional, Delayed, and Immediate/ Gauge •...
- Page 34 REFERENCE BAR GRAPHS OPERATIONAL PERFORMANCE NDBG SEGMENTS FUNCTION ACCURACY No Deco Up to 4 displayed Depth ±1% of full scale Deco All 5 displayed Timers 1 second per day Dive Counter - O2BG SEGMENTS • Displays Dives #1 to 50, 0 if no dive made yet Normal Up to 4 displayed •...
- Page 35 REFERENCE Shutoff - Decompression Capabilities - • Automatically shuts Off if no dive is made within • Decompression stop ceilings at 10, 20, 30, 40, 2 hours after initial activation. Reactivation 50, 60 FT (3, 6, 9, 12, 15, 18 M) required.
- Page 36 Algorithm - A step-by-step mathematical formula decompression sickness. designed to accomplish a particular result (i.e. Decompression Stop - The depth(s) at which a Dive Time Remaining in the LOGIC). diver must pause during ascent to allow absorbed Alternate Display Additional information nitrogen to escape naturally from the tissues.
- Page 37 GLOSSARY LCD - Abbreviation for liquid crystal display, an Oxygen Tolerance - Dose or exposure to the easily viewed low voltage display usually found physiological affects of elevated levels of oxygen. on dive computers Oxygen Toxicity - The adverse physiological Maximum Depth - The deepest depth attained effects of exposure to elevated levels of oxygen.
- Page 38 L O G I C D I V E C O M P U T E R DSAT NDLS (HR:MIN) AT ALTITUDE (IMPERIAL) ALTITUDE / 3001 4001 5001 6001 7001 8001 9001 10001 11001 12001 13001 DEPTH (FEET) 3000 4000 5000 6000 7000...
- Page 39 L O G I C D I V E C O M P U T E R DSAT NDLS (HR:MIN) AT ALTITUDE (METRIC) ALTITUDE / 1221 1526 1831 2136 2441 2746 3051 3356 3661 3966 DEPTH (METERS) 1220 1525 1830 2135 2440 2745...
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Page 40: Inspection / Service Record
L O G I C D I V E C O M P U T E R 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 SherwoodScuba.com... - Page 41 SherwoodScuba.com...
- Page 42 COPYRIGHT SHERWOOD SCUBA V1.4.06.10.2024 SherwoodScuba.com SherwoodScuba.com SherwoodScuba.com...
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