Sherwood CR2709 User manual

Brand: Sherwood

Model: CR2709

Category: Scuba diving fins

Type: User manual

This manual is also suitable for

Insight

RESPONSIBLE COMPUTER DIVING

• Always Plan Each Dive

• Always Limit Your Dive to the Level of Your

Training and Experience

• Always Make Your Deepest Dive First

• Always Make The Deepest Part Of Every Dive First

• Check Your Computer Often During the Dive

• 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

INSIGHT

The following symbols are used throughout this manual to bring your attention to situations that require

special consideration. Be sure to read and follow all instructions carefully.

A NOTE is used to emphasize an important maintenance technique.

A CAUTION is used before a maintenance technique that will result in damage to parts if

that technique is not followed carefully.

A WARNING is used before a procedure that will result in serious injury or death if the

procedure is not followed carefully.

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.

Air - a breathing gas that contains approximately 21% oxygen and 79% nitrogen (nature's common nitrogen-oxygen mixture).

Nitrox - a nitrogen-oxygen breathing gas that contains a higher fraction of oxygen (22 to 50%) than air.

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.

• It must not be used by untrained persons who may not have knowledge of the potential risks

and hazards of scuba diving, and diving with enriched nitrogen-oxygen (nitrox) mixtures.

• You must obtain scuba certification, and certification in diving with enriched nitrogen-oxygen

mixtures (nitrox) before using the INSIGHT 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 INSIGHT.

• 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.

INSIGHT

LIMITED TWO-YEAR WARRANTY

Sherwood Scuba guarantees, to the original purchaser only, that the INSIGHT 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 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.

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 manual. This warranty is non transferrable and applies to the original

purchaser only. All correspondence concerning this warranty must be accompanied by a copy of the original sales receipt and a copy of the owner’s

portion of the warranty registration card including the annual inspection record.

Once each year you must return the INSIGHT to an Authorized Sherwood 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 INSIGHT. Modifications or repair by anyone other than a Sherwood Sales and Service Center authorized

to service the INSIGHT 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 INSIGHT to you, you agree and understand that

in no event will Sherwood Scuba, its distributors or retailers, be held liable for any personal injuries resulting from its operation, or for any

other damages whether direct, indirect, incidental, or consequential even if Sherwood Scuba is advised of such damages.

Some states do not allow the exclusion or limitation of implied warranties or liabilities for incidental or consequential damages, so the above limitation

may not apply to you.

Warranty does not extend to the plastic gauge face, o-rings, batteries, or damage due to accident, abuse, modification, or tampering.

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 LLC / 2002 Design.

INSIGHT Dive Computer Manual, Doc. No. 12-2971

TRADEMARK NOTICE

Sherwood Scuba, the Sherwood Scuba logo, and HydroGlo are registered or unregistered trademarks of Sherwood Scuba LLC. INSIGHT and

the INSIGHT logo are trademarks of Sherwood Scuba LLC. All rights are reserved.

PATENT NOTICE

U.S. Patents, registered in the U.S. Patent and Trademark Office, have been issued to protect the following design features:

Data Sensing and Processing Device (U.S. Patent no. 4,882,678) and Ascent Rate Indicator (U.S. Patent no. 5,156,055).

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. Still, using the INSIGHT, 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.

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.......................................................................................................................................... 16

Time and Date Displays ............................................................................................................................ 16

Temperature Display ................................................................................................................................. 17

Audible Alarm................................................................................................................................................17

Backlight ....................................................................................................................................................... 19

Power Supply................................................................................................................................................ 19

Operating Temperature ................................................................................................................................. 20

ACTIVATION AND SETUP ........................................................................................................................... 21

Activation ......................................................................................................................................................22

Push Button .............................................................................................................................................. 22

Water Contact ........................................................................................................................................... 22

Diagnostic Mode .......................................................................................................................................23

Responsible

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) ....................................................................................................................38

• Set Operating Mode ............................................................................................................................ 38

• Set PO2 Alarm Value ...........................................................................................................................39

• Set FO2 Value ..................................................................................................................................... 40

• Set FO2 Default On/Off ....................................................................................................................... 41

Set 2 Group (Alarms)................................................................................................................................ 42

• Set All Alarms On/Off...........................................................................................................................42

• Set Ascent Alarm On/Off......................................................................................................................42

• Set Depth Alarm On/Off....................................................................................................................... 43

• Set Depth Alarm Value ........................................................................................................................ 44

• Set Elapsed Dive Time Alarm On/Off ..................................................................................................45

• Set Elapsed Dive Time Alarm Value.................................................................................................... 45

• Set Reserve Time Alarm On/Off .......................................................................................................... 46

• Set Reserve Time Alarm Value............................................................................................................ 47

• Set Deco Alarm On/Off ........................................................................................................................ 47

• Set PO2 Alarm On/Off ......................................................................................................................... 48

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

• Set Hour Format .................................................................................................................................. 52

• Set Time .............................................................................................................................................. 52

• Set Date...............................................................................................................................................53

DIVE MODES ...............................................................................................................................................55

No Deco Main ...............................................................................................................................................56

No Deco Deep Stop ......................................................................................................................................58

No Deco Safety Stop ....................................................................................................................................60

Digital Gauge Mode ......................................................................................................................................61

High PO2 Dive Mode .................................................................................................................................... 62

High O2 Dive Mode ...................................................................................................................................... 63

Decompression Dive Mode ..........................................................................................................................64

Conditional Violation.....................................................................................................................................65

Delayed Violation 1.......................................................................................................................................66

Delayed Violation 2.......................................................................................................................................66

Delayed Violation 3.......................................................................................................................................66

Violation Gauge Mode .................................................................................................................................. 67

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............................................................................................................................. 80

Oxygen Exposure Limits............................................................................................................................... 81

Altitude Diving...............................................................................................................................................83

Flying After Diving .........................................................................................................................................84

Dive Time Remaining....................................................................................................................................85

Clear (Reset) ................................................................................................................................................87

PC Interface (Upload/Download) .................................................................................................................. 88

Specifications ................................................................................................................................................ 89

Glossary........................................................................................................................................................94

Altitude NDL Tables ...................................................................................................................................... 96

Inspection/Service Record............................................................................................................................ 98

Full LCD ........................................................................................................................................................ 99

INSIGHT

FEATURES

and

DISPLAYS

INTRODUCTION

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

Your new INSIGHT 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 INSIGHT'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 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

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

INSIGHT

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. 1b) as the S (Select).

While on the surface, you can use the buttons to maneuver through the Insight's unique Menu System

that allows -

• selection of 3 Main Operating Modes (Air, Nitrox, or Gauge)

• viewing of various information displays (Last Dive, Plan Depths/Times, Dive Logs, History,

etc.)

• entering of settings divided into 4 convenient categories (Basics, Alarms, Utilities, and Time)

• activation of the Backlight

• operation of an onboard Simulator

• setup for a PC interface program

During the Dive modes, the buttons may be used to -

• activate the display's Backlight

• view Alternate displays of information

• acknowledge Alarms

The INSIGHT uses easy to understand alpha/numeric displays and graphic icons (Fig. 2). It is impera-

tive that you understand the formats, ranges, and values of the information presented by the

INSIGHT's numeric and graphic displays to avoid any possible misunderstanding that could result in

an error.

Fig. 1 - Buttons & Icons

BAR GRAPHS

N2/O2 (Nitrogen/Oxygen) Bar Graph

The INSIGHT features a shared Bar Graph that represents either Nitrogen loading identified by the N2

icon (Fig. 2a), or when accessed, Oxygen accumulation identified by the O2 icon (Fig. 3a). By de-

fault, 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-

lower depths, the segments will begin to recede, indicating that additional no deco time is allowed.

The N2BG monitors 12 different nitrogen compartments simultaneously and displays the one that is in

control of your dive. It consists of 5 segments, the lower 4 represent No Decompression status and the

fifth at the top indicates a 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.

Regardless of which parameter the Bar Graph is representing at the time, nitrogen and oxygen calcula-

tions will continue to be performed in the background.

Fig. 2 - Nitrogen BG

Fig. 3 - Oxygen BG

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). Refer to the chart at the right 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. 4 - ASC

Ascent Bar Graph

=> 60 FT (18 M)

Segments Ascent Rate =

Displayed FPM MPM

0 0 - 20 0 - 6

1 21 - 50 6.5 - 15

2 51 - 60 15.5 - 18

3 > 60 > 18

< 60 FT (18 M)

Segments Ascent Rate =

Displayed FPM MPM

0 0 - 10 0 - 3

1 11 - 25 3.5 - 7.5

2 26 - 30 8 - 9

3> 30> 9

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. 5a) from 0 to 330 FT (99.9 M) in 1 FT (.1 M) in-

crements. The Max Depth reached during that dive will also be displayed (Fig. 5b).

• When the unit is set to operate as a Digital Depth Gauge/Timer (referred to as Gauge Mode), the

Depth Display range is 'extended' to 399 FT (120 M).

• At depths greater than 99.9 M, it will indicate metric values in increments of 1 M.

Time and Date Displays

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 in-

dicating real time (e.g., Dive Time), and is solid (not blinking) when times are calculated projections

(e.g., Time to Fly).

Primary times such as Time of Day (Fig. 6a) are configured with larger digits, while secondary times

such as Surface Interval (Fig. 6b) are smaller.

Date (Fig. 6c) is only displayed during select surface modes such as the TIME screen.

Fig. 5 - Depth

Fig. 6 - Times

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.

NOTE: The Informational Displays are described in detail as the various

operating modes they appear in are presented throughout this manual.

AUDIBLE ALARM

When Reminder Alarm situations activate the Alarm, the unit will emit a quick double beep each sec-

ond for 10 seconds, or until the situation is corrected, or it is acknowledged by pressing the S (Right)

button.

When Cautionary Alarm situations activate the Alarm, the beep will be on for 1/2 second then off 1/2

second, repeating for 10 seconds, or until the situation is corrected, or it is acknowledged by pressing

the S (Right) button.

Some Alarms cannot be acknowledged. These are differentiated by 1 beep per second for 10 seconds

followed by a full 3 second beep.

If an Alarm is acknowledged and the situation corrected, the Alarm will sound again if the situation

occurs again, or another Alarm situation occurs.

Fig. 7B - Temp (dives)

Fig. 7A - Temp & Altitude

(surface)

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.

Reminder Alarm situations include -

• PO2 equal to or greater than 1.60 ATA, or the Max PO2 Alarm setting.

• Descent deeper than the Max Depth Alarm setting.

• Dive Time Remaining decreases to the Alarm setting.

Cautionary Alarm situations include -

• Entry into Decompression Mode

• O2 Accumulation equal to or greater than allowable per dive limit, or limit for a 24 hour period.

• Ascending above a required Decompression Stop Depth for less than 5 minutes.

• Ascent rate exceeds 60 FPM (18 MPM) when deeper than 60 FT (18 M), or 30 FPM (9 MPM) at 30 FT (9 M) or less.

• Entry into Delayed or Full Violation modes (described later).

Situations in which the Alarm cannot be acknowledged include -

• Being above a required Decompression Stop Depth for more than 5 minutes.

• Being in Decompression that requires a Stop Depth much greater than 60 FT (18 M).

• Being on the surface for 5 minutes without completing a Decompression obligation.

INSIGHT

BACKLIGHT

To activate the HydroGlo

Backlight, press the S (Right) button momentarily (< 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 dive lights when

conducting dives that could include low light situations.

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.

Battery Indicator

A Battery icon (Fig. 8a) provides an indication of Low Battery Condition. It will only appear on the

Surface TIME (or WET), DATA, and FLY/SAT screens. It will not be displayed on other surface dis-

play screens or during Dive Modes.

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 warn-

ing that the Battery is to be changed prior to conducting any further dives with the unit.

Fig. 8 - Low Battery

• If a Low Battery Condition exists when the unit is activated (by pressing the button), the Battery icon will appear flash-

ing 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 past 4 feet (1.2 meters). 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 TIME (or WET) screen is displayed.

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.

It is possible to damage the electronics if left exposed to direct sunlight, or in a hot confined space (like a car trunk). Af-

ter 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.

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Sherwood CR2709 User manual

Brand: Sherwood

Model: CR2709

Category: Scuba diving fins

Type: User manual

This manual is also suitable for

Insight

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Sherwood CR2709 User manual

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Sherwood CR2709 User manual

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