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Sherwood Scuba Insight Manual Manual

Dive computer
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  • Page 2 Do A Safety Stop On Every Dive • Allow Adequate Surface Interval Between Each Dive • Allow Adequate Surface Interval Between Each Day Of Diving (12 Hours Or Until Your Computer Clears) Read And Understand This Manual Thoroughly Before Using the INSIGHT. Responsible...
  • Page 3 A NOTE is used to emphasize an important maintenance technique. Throughout this owner's manual reference is made to the term 'breathing gas'. The rationale being that the INSIGHT can be used for Air dives or Nitrox dives. For clarity, these terms are defined as - Breathing Gas - the gaseous mixture breathed during a dive.
  • Page 4 WARNINGS: • The INSIGHT is intended for use by recreational divers who have successfully completed a nationally recognized course in scuba diving, and diving with enriched nitrogen-oxygen (nitrox) breathing gas mixtures. • It is intended only for no decompression diving, NOT intentional decompression diving.

  • Page 5: Warranty

    Should your INSIGHT 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: Notices

    DECOMPRESSION MODEL The programs within the INSIGHT 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 INSIGHT dive computer model is based upon the latest research and experiments in decompression theory.

  • Page 7: Table Of Contents

    INSIGHT CONTENTS Warranty ................................. 5 Notices ................................6 FEATURES and DISPLAYS ......................... 11 Introduction ..............................12 Features and Displays ..........................13 Bar Graphs ..............................14 N2/O2 (Nitrogen/Oxygen) Bar Graph ....................... 14 Ascent Rate (ASC) Bar Graph ........................16 Informational Displays ..........................16 Depth Displays ............................
  • Page 8 CONTENTS (CONTINUED) Surface Screens ............................23 Time Screen .............................. 23 Time/Wet Screens ............................ 24 Data Screens ............................25 Plan Screens ............................27 Last Dive Screens ............................. 29 Log Mode ..............................30 History Mode ............................. 33 Simulator ..............................34 Entering Settings ............................37 Set 1 Group (Modes/Basics) ........................
  • Page 9 INSIGHT CONTENTS (CONTINUED) Set 3 Group (Utilities) ..........................49 • Set Wet Activation On/Off ........................49 • Set Units of Measure ........................... 49 • Set Sample Rate Value ........................50 • Set Deep Stop On/Off .......................... 51 Set 4 Group (Date/Time) .......................... 52 •...
  • Page 10 CONTENTS (CONTINUED) CARE and MAINTENANCE ......................... 69 Care and Cleaning ............................70 Inspections and Service ..........................71 Battery Life ..............................72 Low Battery Condition ........................... 72 Battery Replacement ............................ 73 REFERENCE ..............................79 Decompression Model ..........................80 Tissue Compartment Control ........................80 No Decompression Limits ..........................

  • Page 11: Features And Displays

    INSIGHT FEATURES DISPLAYS...

  • Page 12: Introduction

    As you use the INSIGHT, 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...

  • Page 13: Features And Displays

    FEATURES AND DISPLAYS The INSIGHT has two Control Buttons that allow you to activate the unit and access specific informa- tion when you choose to see it. The Left button (Fig. 1a) is referred to as the A (Advance) and the Right button (Fig.

  • Page 14: Bar Graphs

    Decompression condition. When the INSIGHT is set to operate in Nitrox mode, the Bar Graph will represent Oxygen accumula- tion when the O2 data screen (Alternate Display) is accessed temporarily. The O2 icon (Fig. 26a) will appear as an indication.

  • Page 15: Ascent Rate (Asc) Bar Graph

    INSIGHT Ascent Rate Bar Graph (ASC) The ASC (Fig. 4a) provides a visual representation of Ascent speed (i.e., an ascent speedometer), 'nor- mal' rate, a 'cautionary' rate, and 'Too Fast'. The segments of the ASC represent 2 sets of speeds which change at a reference depth of 60 FT (18 M).

  • Page 16: Informational Displays

    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 possible misunderstanding that could result in error. Depth Displays During dives, the Current Depth is displayed (Fig.

  • Page 17: Temperature Display

    INSIGHT Temperature and Altitude Displays Temperature (Fig. 7A_a) and Altitude (Fig. 7A_b) can be viewed on a Data Display, which can be accessed while viewing the TIME screen while on the surface. Temperature can be viewed on an Alternate Display (Fig. 7B_a) which can be accessed during dives.
  • Page 18 A single short beep is emitted after the Diagnostic check, upon automatic return to Surface Mode from Simulator Mode, upon completion of a battery change with calculations/settings saved, or upon change from Delayed to Full Violation after that dive. In the event that another Alarm situation occurs, any scrolling message will be displayed until it is acknowledged, at which time it will be replaced by a message that was previously scrolling.

  • Page 19: Backlight

    POWER SUPPLY The INSIGHT utilizes one (1) 3 volt, CR2450 Lithium Battery that should provide from 300 dive hours of operation if you conduct one 1 - hour dive each time the unit is activated, to over 600 dive hours of operation if you conduct two or more dives each time the unit is activated.

  • Page 20: Operating Temperature

    OPERATING TEMPERATURE The INSIGHT 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 trans- ported in extremely low temperature areas (below freezing), warm the unit and battery with body heat before diving.

  • Page 21: Activation And Setup

    INSIGHT ACTIVATION SETUP...

  • Page 22: Activation

    A momentary press of the A (Left) button activates the INSIGHT. The INSIGHT will automatically turn OFF 2 hours after activation if no dive is made. If the water ac- tivation contacts are still bridged (the unit is wet), it automatically reactivates.

  • Page 23: Diagnostic Mode

    INSIGHT DIAGNOSTIC MODE (ONLY IF MANUALLY ACTIVATED) Immediately following manual (push button) activation, the INSIGHT lights all segments of the LCD and initiates a countdown sequence (Fig. 10). Following the countdown sequence (from 8, -, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) which takes about 2 seconds, it verifies that sensor readings and battery voltage are within tolerance.

  • Page 24: Time/Wet Screens

    TIME/WET SCREENS (Fig. 12/13) Appearing on the display are - • Alpha graphic TIME (Fig. 12), or WET (Fig. 13) • Date (month.day) • Elapsed surface time (or time since activation if no dive made yet that day) with TIME and SURFACE icons •...

  • Page 25: Data Screens

    INSIGHT DATA SCREENS The DATA screens are accessible during a new activation period or greater than 10 minutes after surfacing from a dive. By pressing the A (Left) button 1 time while the TIME (or WET) screen is being displayed (TIME/WET >> DATA), you can ac- cess the DATA screen representing the Mode that you set the dive computer to operate in (Nitrox, Air, or Gauge described later).
  • Page 26 AIR MODE DATA screen (Fig. 14) • Alpha graphic DATA • Temperature and graphic (F or C) • Altitude level graphic SEA (or L - 2 through L - 7, or outr) • AIR graphic (indicating operating mode) Fig. 14 - Air Mode Data NITROX MODE DATA screen (Fig.

  • Page 27: Plan Screens

    INSIGHT PLAN SCREENS The PLAN screens are accessible during a new activation period or greater than 10 minutes after surfacing from a dive. When set for Air or Nitrox operation, pressing and releasing the A (left) button 2 times (< 2 sec each time) while the TIME/ WET screen is being displayed (TIME/WET >>...
  • Page 28 AIR MODE PLAN screen (Fig. 17) • Alpha graphic PLAN • Air graphic (indicating operating mode) • No Deco Limit (hr:min) with DIVE TIME icons, 3 dashes if no time available • Plan Depth with FEET (or METERS) icon • N2 Bar Graph (4 No Deco segments) NITROX MODE PLAN screen (Fig.

  • Page 29: Last Dive Screens

    INSIGHT LAST DIVE SCREENS The LAST Main screen is accessible by pressing the A (Left) button 3 times while the TIME/WET screen is being displayed (TIME/WET >> DATA >> PLAN >> LAST). It displays data for the most recent dive conducted. Pressing the S (Right) button will access the ALT screen, if set for Nitrox, which returns to the Main after 5 seconds or if S is pressed again.

  • Page 30: Log Mode

    LOG MODE Log Mode stores information for each dive as 3 screens referred to as the Date Screen, Screen #1, and Screen #2. Upon gaining access to the screens, information displayed is frozen until either button is pressed again. If neither button is pressed, operation reverts to the TIME screen in 2 minutes.
  • Page 31 INSIGHT LOG GO TO screen (Fig. 20) • Displayed are the Alpha graphics LOG and Go to - While viewing the LOG GO TO screen - > Pressing both buttons for 2 seconds reverts to the TIME/WET screen. > Pressing the A button bypasses Log Mode and accesses the HISTORY screen.
  • Page 32 While viewing the LOG DATE screen - > Pressing and releasing the A button will access that dive’s Log Screen #1 (SCR1). > Pressing and releasing the S button repeatedly (< 2 sec each time) steps through the recorded LOG DATE screens. Pressing and holding it, scrolls through them at a rate of 8 per second. The Backlight does not operate when S is pressed.

  • Page 33: History Mode

    INSIGHT LOG Screen #2 (SCR2 - Fig. 23) • Alpha 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 or Gauge •...

  • Page 34: Simulator

    HISTORY 2 screen (Fig. 25) • Alpha graphic HIST • Minimum Temperature attained with degrees icon and graphic F (or C) • Graphic SEA (or L - 2 through L - 7, or out) representing the highest Altitude at which a dive was conducted •...
  • Page 35 INSIGHT SIMULATOR GO TO screen (Fig. 26) • Displayed are the Alpha graphics SIMU and Go to - While viewing the SIMU GO TO screen - > Pressing both buttons for 2 seconds reverts to the real TIME/WET screen. > Pressing the A button bypasses Simulator Mode and accesses the SET GO TO screen.
  • Page 36 SIMULATOR SURFACE screen (Fig. 29) • Alpha graphic SURF • Date (month.day) • Surface Interval (hr:min) with graphics TIME and SURFACE • NITROX icon, blank if Air • Time of Day (hr:min) Fig. 29 - Simu Surface > Depressing and holding the S button increases Surface Interval (SI) 1 minute per real second. >...

  • Page 37: Entering Settings

    INSIGHT When the Simulator Ascents and Descents are stopped, depressing/holding the S button (> 2 sec) in- creases Elapsed Dive Time 1 minute per real 10 seconds (6 times). Upon ascending to 2 FT (1 M) for 1 second, the Simulator SURF screen will be displayed.

  • Page 38: Set 1 Group (Modes/Basics)

    > Pressing and releasing the A button while the SET 1 GO TO screen is displayed, accesses the Set Operating MODE screen with the Set Point flashing. SET OPERATING MODE Factory set for AIR, the INSIGHT can also be set for NITROX or GAUGE. Appearing on the screen are (Fig. 34) - • Alpha graphic MODE •...

  • Page 39: Set Po2 Alarm Value

    INSIGHT When set for AIR - • calculations are the same as when it is set for NITROX with FO2 set for 21%. • it remains set for AIR until it is set for NITROX. • it internally keeps track of the oxygen accumulation so that if it is subsequently set for NITROX, the O2 values of previ- ous AIR dives are accounted for in the Nitrox dives (during that activation period and series of repetitive dives).

  • Page 40: Set Fo2 Value

    > Pressing and holding the side (Select) button scrolls through the set points at a rate of 4 per sec- ond . > Pressing and releasing the front (Advance) button accepts the setting and advances to SET FO2. > Pressing Both buttons for < 2 seconds activates the Backlight. >...

  • Page 41: Set Fo2 Default On/Off

    INSIGHT > Pressing and releasing the A button saves the setting and advances to SET FO2 DEFAULT. > Pressing both buttons for 2 seconds reverts to the TIME/WET screen. • Operation reverts to the TIME/WET screen if neither button is pressed in 2 minutes.

  • Page 42: Set 2 Group (Alarms)

    SET 2 GROUP (ALARMS) Pressing and releasing the S button momentarily 2 times, while the SET GO TO screen is displayed, will access the SET 2 GO TO screen. Pressing and releasing the A button 1 time, while the SET 2 GO TO screen is displayed, will access the SET ALL ALARMS screen with the Set Point flashing.

  • Page 43: Set Depth Alarm On/Off

    INSIGHT To access SET ASCENT ALARM while viewing the SET 2 GO TO screen, press/release the A button (2 times) until the Set screen appears (Fig. 39) - • Alpha graphics ASNT and AL • Set Point graphic ON (or OFF), flashing •...

  • Page 44: Set Depth Alarm Value

    > Pressing and releasing the A button saves the Set Point and advances to SET DEPTH ALARM VALUE (if set ON) or SET ELAPSED DIVE TIME ALARM (if set OFF). > Depressing both buttons for 2 seconds reverts to the TIME/WET screen. •...

  • Page 45: Set Elapsed Dive Time Alarm On/Off

    INSIGHT SET ELAPSED DIVE TIME ALARM ON/OFF Factory set ON, the ELAPSED DIVE TIME (EDT or Bottom Time) ALARM can also be set OFF. When set OFF, the Alarm will not sound when EDT increases. To access SET ELAPSED DIVE TIME (EDT) ALARM while viewing the SET 2 GO TO screen, press/release the A button (4 or 5 times) until the Set screen appears (Fig.

  • Page 46: Set Reserve Time Alarm On/Off

    > Depressing and holding the S button scrolls upward through the Set Points at a rate of 8 per second until released. > Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) steps upward through the Set Points 1 at a time.

  • Page 47: Set Reserve Time Alarm Value

    INSIGHT • Operation reverts to the TIME/WET screen if neither button is pressed in 2 minutes. SET RESERVE TIME ALARM VALUE Factory set for 5 minutes, the RESERVE TIME ALARM VALUE can also be set from 1 to 30 minutes in increments of 1 minute.

  • Page 48: Set Po2 Alarm On/Off

    To access SET DECO ALARM while viewing the SET 2 GO TO screen, press/release the A button (6 or 7 times) until the Set screen appears (Fig. 46) - • Alpha graphics DECO and AL • Set Point graphic ON (or OFF) flashing, with full N2BG solid >...

  • Page 49: Set 3 Group (Utilities)

    INSIGHT SET 3 GROUP (UTILITIES) Pressing and releasing the S button momentarily 3 times, while the SET GO TO screen is displayed, will access the SET 3 GO TO screen. Pressing and releasing the A button 1 time, while the SET 3 GO TO screen is displayed, will access the SET H2O SENSOR screen with the Set Point flashing.

  • Page 50: Set Sample Rate Value

    To access SET UNITS while viewing the SET 3 GO TO screen, press/release the A button (2 times) until the Set screen appears (Fig. 49) - • Alpha graphics FT (or M) and F (or C) with ° and FEET (or METERS) icons, all flashing >...

  • Page 51: Set Deep Stop On/Off

    INSIGHT > Pressing and releasing the S button steps through the Rate Set Points. > Pressing and releasing the A button saves the Set Point and advances to SET DEEP STOP. > Depressing both buttons for 2 seconds reverts to the TIME/WET screen.

  • Page 52: Set 4 Group (Date/Time)

    SET 4 GROUP (DATE/TIME) Pressing and releasing the S button momentarily 4 times, while the SET GO TO screen is displayed, will access the SET 4 GO TO screen. Pressing and releasing the A button 1 time, while the SET 4 GO TO screen is displayed, will access the SET HOUR FORMAT screen with the Set Point flashing.

  • Page 53: Set Date

    INSIGHT To access SET TIME while viewing the SET 4 GO TO screen, press/release the A button 2 times. In- formation displayed includes (Fig. 53) - • Alpha graphic AM or PM (if set for 12 Hour Format), or 24HR (if set for 24 Hour Format) •...
  • Page 54 To access SET DATE while viewing the SET 4 GO TO screen, press/release the A button 4 times. In- formation displayed includes (Fig. 54) - • Alpha graphic YEAR • Month.Day previously set • Time of Day (hr:min) previously set with TIME icon •...

  • Page 55: Dive Modes

    INSIGHT DIVE MODES...

  • Page 56: No Deco Main

    DIVE MODES During Dive Modes, a Main (Default) screen of information relevant to that Dive Mode is displayed. During No Deco dives deeper than 80 FT (24 M), if enabled a Deep Stop (a Set 3 selection) to be taken at 1/2 Max Depth for 2 minutes (2:00 min:sec) is triggered and displayed as a Preview screen when accessed while 10 FT (3 M) deeper than the calculated Stop Depth and as a Stop screen upon ascent to 10 FT (3 M) below the Stop Depth.
  • Page 57 INSIGHT NO DECO ALT 1 Information displayed includes (Fig. 56) - • Temperature with ° icon and graphic F (or C) • Time of Day (hr:min) with TIME icon • Current Depth with FEET (or METERS) icon > Pressing and releasing the A (Left) button accesses the ALT 2 screen, if Nitrox.

  • Page 58: No Deco Deep Stop

    NO DECO DEEP STOP During No Deco dives in which Depth exceeds 80 FT (24 M), a Deep Stop Preview screen can be ac- cessed 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).
  • Page 59 INSIGHT Upon ascending to within 10 FT (3 M) below the calculated Deep Stop, a Deep Stop (DS) Main screen (Fig. 59) will automatically appear with the alpha graphics DEEP and STOP scrolling at the top of the screen (each On for 2 seconds).

  • Page 60: No Deco Safety Stop

    NO DECO SAFETY STOP Upon ascending to 20 FT (6 M) on any No Decompression dive in which Depth exceeded 30 FT (9 M), a Safety Stop screen appears with a countdown timer beginning at 3:00 (min:sec) and counting down to 0:00. NOTE: The Safety Stop is not required and although recommended, it does not have to be taken.

  • Page 61: Digital Gauge Mode

    INSIGHT DIGITAL GAUGE MODE When set for Digital Gauge Mode, the unit operates without any decompression or oxygen monitoring functions, basically as a Depth Gauge/Timer. A contiguous 24 hour post dive surface interval is then required for the unit to operate as a full function diving computer.

  • Page 62: High Po2 Dive Mode

    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, NDC, and the N2BG (Fig. 64). If PO2 decreases, the Dive Main screen will be displayed.

  • Page 63: High O2 Dive Mode

    INSIGHT 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 Audible Alarm sounds, the graphics HIGH >> O2 flash (each on 1/2 second), and the UP Arrow icon flashes (Fig. 66).

  • Page 64: Decompression Dive Mode

    DECOMPRESSION DIVE MODE 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 Audible Alarm sounds, and the message DECO >> STOP >> xxFT (or xxM) scrolls at the top of the screen (each on 2 seconds).

  • Page 65: Conditional Violation

    INSIGHT CONDITIONAL VIOLATION (CV) If you disregard a Decompression obligation (i.e., ascend above the Required Stop Depth), operation enters Conditional Violation Mode. The Audible Alarm sounds and the message DOWN >> TO >> STOP scrolls at the top of the screen (each on 2 seconds). If the situation is corrected within 5 min- utes, 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.

  • Page 66: Delayed Violation 1

    DOWN >> TO >> STOP DELAYED VIOLATION # 1 (DV1) (scrolling) DV1 is a continuation of CV which occurs if you remain above the Stop Depth for longer than 5 min- utes. At 5 minutes, the Audible Alarm will sound (even if set Off), the Down Arrow icon, Total As- cent Time, and full N2BG will flash, and the message DOWN >>...

  • Page 67: Violation Gauge Mode

    INSIGHT UP >> TOO >> DEEP The Audible Alarm will sound (even if set Off), the Up Arrow icon and N2BG segments (only those (scrolling) loaded) will flash, and the message UP >> TOO >> DEEP will scroll (Fig. 73).
  • Page 68 This rule applies to the use of all dive computers, but is especially important when using the INSIGHT, due to the personal information it provides.

  • Page 69: Care And Maintenance

    WARNING: If any portions of the display are missing or appear dim, or a Low Battery Condition is indicated after Battery replacement, return your INSIGHT to an Authorized Sherwood Scuba Dealer for a complete evaluation before attempting to use it.

  • Page 70: Care And Cleaning

    CLEANING Soak and rinse the Insight 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 de- posits can also be dissolved using a 50% white vinegar/50% fresh water bath.

  • Page 71: Inspections And Service

    Sensor; possibly resulting in erroneous depth or time readings. It is possible to damage the Insight Depth Sensor if it is not pressure tested properly. The Insight must be placed completely underwater when being pressure tested to protect the Depth Sensor.

  • Page 72: Battery Life

    5 seconds followed by shutdown of the Insight. If the Insight did not display the Low Battery symbol prior to entering the Dive mode, and a Low Bat- tery condition occurs during a dive, there will be sufficient battery power to maintain unit operation for the remainder of that dive, however the Backlight will be disabled.

  • Page 73: Battery Replacement

    BATTERY REPLACEMENT PROCEDURES MODULE REMOVAL FROM BOOT If the Insight is in a Wrist Boot, it will be necessary to peel the lips of the Boot downward off the Module while applying pres- sure from underneath, working it out slowly.
  • Page 74 • Inspect the Buttons, 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 Insight until it receives proper service by an Authorized Sherwood Scuba Dealer.
  • Page 75 (set at 'no heat'). WARNING: If damage or corrosion is found in the Battery Compartment, return your Insight to an Authorized Sherwood Scuba Dealer, and DO NOT attempt to Fig. 79 - Battery Insertion use it until it has received factory prescribed service.
  • Page 76 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 77 NOTE: The Wet Activation Contacts are located on the stems of the Buttons and on metal Pins located on the lower left side of the module. The Insight 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.
  • Page 78 • The oxygen features of the Insight are intended for use only by recreational divers trained for nitrox diving by an instructor certified by a recognized training agency to teach diving with nitrox.

  • Page 79: Reference

    INSIGHT REFERENCE...

  • Page 80: Decompression Model

    Note how the No Decompression Limits for the INSIGHT are contrasted with the U.S. Navy limits 150 (45) 8 (8) (Fig. 84). The INSIGHT's Dive Planner does not scroll past 190 FT (57 M), or to depths at which 160 (48) 7 (7)

  • Page 81: Oxygen Exposure Limits

    Exposure Time OXYGEN EXPOSURE LIMITS (OTLS) Per Dive Per 24hr Predicted exposure limits and oxygen calculations of the INSIGHT are based on maximum exposure (ATA) (Min) (Min) durations published by the National Oceanic and Atmospheric Administration (NOAA) in the October 0.60...
  • Page 82 Performing strenuous tasks could cause the symptoms of oxygen poisoning to occur at PO2 levels lower than they normally would appear during casual recreational diving. WARNING: The nitrox features of the INSIGHT are intended for use only by recreational divers trained for nitrox diving by an instructor certified by a recognized training agency to teach diving with nitrox.

  • Page 83: Altitude Diving

    The INSIGHT senses ambient pressure when it is activated, every 15 minutes while it is activated, or every 30 minutes when it is not activated. At an Altitude of 3,001 feet (916 meters), it will automati- cally recalibrate itself to measure depth in feet of fresh water rather than feet of sea water.

  • Page 84: Flying After Diving

    WARNING: The INSIGHT will not sense ambient pressures or provide Altitude compensation when it is wet. DO NOT dive at any different Altitude until the unit shuts off and is reactivated at the new Altitude. If the unit is activated at elevations higher than 14,000 feet (4,270 meters), it will perform a diagnostic check followed by immediate shutdown.

  • Page 85: Dive Time Remaining

    DIVE TIME REMAINING (DTR) One of the most important pieces of information on the Insight is the patented DTR numeric display. To numerically display Dive Time Remaining, the Insight constantly monitors two critical pieces of information; no decompression status and oxygen accumulation status.
  • Page 86 This is a feature of the decompression model that is the basis for multilevel div- ing, one of the most important advantages the Insight offers. The no decompression algorithm is based upon Haldane’s theory using maximum allowable nitrogen levels developed by Merrill Spencer.

  • Page 87: Clear (Reset)

    INSIGHT CLEAR (RESET) The INSIGHT computer is configured with a feature that allows calculations pertaining to a dive series in progress to be interrupted. Activation 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 88: Pc Interface (Upload/Download)

    PC program. When the cable is connected, a PC screen will be displayed for 2 minutes, or until the data transfer is complete if less. While the PC screen is displayed, the buttons on the INSIGHT will be disabled. Interruption of the connection will only occur if the cable is disconnected during the countdown.

  • Page 89: Specifications

    INSIGHT SPECIFICATIONS SURFACE MODES / SCREENS SURFACE MODES / SCREENS (continued) • Set 3 (Utilities): • Activation/Diagnostic • Time/Wet • Wet Activation (On/Off) • Units of Measure (Imperial/Metric) • Fly/Dsat • Data (Air, Nitrox, Gauge) • Sampling Rate (15, 30, 60 min) •...
  • Page 90 SPECIFICATIONS (CONTINUED) BAR GRAPHS DISPLAY RANGES / RESOLUTION Range: Resolution: N2BG: segments • Dive Number 0 - 50 • No Deco up to 4 displayed • Depth 0 - 399 FT (0 - 120 M) 1 FT (.1/1 M) • Deco all 5 displayed •...
  • Page 91 INSIGHT SPECIFICATIONS (CONTINUED) OPERATIONAL PERFORMANCE Function: Accuracy: • Depth ±1% of full scale • Timers 1 second per day Dive Counter: • Displays Dives #1 to 50, 0 if no dive made yet • Resets to Dive #1, upon reactivation after shutdown Dive Log Mode: •...
  • Page 92 SPECIFICATIONS (CONTINUED) Activation: • Manual - push button (recommended) • Automatic - by immersion in water, if set ON • WET graphic indicates Wet Contacts are bridged (unit must be dried prior to transport or storage). • Automatically set for AIR Mode operation upon activation •...
  • Page 93 INSIGHT SPECIFICATIONS (CONTINUED) NO DECOMPRESSION MODEL DEFAULT SETTINGS AS SHIPPED FROM THE FACTORY • Operating Mode Basis: • PO2 Alarm • Modified Haldanean Algorithm • PO2 Alarm Value 1.60 ATA • 12 tissue compartments • FO2 • 50% FO2 Default Data Base: •...

  • Page 94: 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 INSIGHT). Alternate Display - Additional information accessible by pressing a control button.
  • Page 95 INSIGHT GLOSSARY Icon - a small pictorial representation of an operational mode LCD - Abbreviation for liquid crystal display, an easily viewed low voltage display usually found on dive computers Maximum Depth - The deepest depth attained during a dive.

  • Page 96: Altitude Ndl Tables

    DSAT NDLS (HR:MIN) AT ALTITUDE (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 2:15...
  • Page 97 INSIGHT DSAT NDLS (HR:MIN) AT ALTITUDE (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 2:31...

  • Page 98: 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...

  • Page 99: Full Lcd

    INSIGHT KEY: 1. A (Advance) button 2. S (Select) button 3. N2/O2 Bar Graph (shared use) 4. ASC (Ascent Rate) Bar Graph 5. Low Battery symbol 6. Descend (Down Arrow) symbol 7. Ascend (Up Arrow) symbol INSIGHT FULL DISPLAY...
  • Page 100 ©2002 Design, 2009 Doc. No. 12-2971-r01 (1/23/09)

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