Sherwood CW6600 User Manual

AMPHOS DC MANUAL

AMPHOS

DIVE COMPUTER MANUAL

CONTENTS

AMPHOS DC MANUAL

NOTICES, WARRANTY, MODEL ......................................................... 3

GLOSSARY...........................................................................................4

DISPLAY ICONS, ABBREVIATIONS & TERMS .................................. 5

FEATURES & DISPLAYS ..................................................................... 6

CONTROL BUTTONS ......................................................................7

OPERATING MODE STRUCTURE .................................................. 7

OPERATION AS A DIVE COMPUTER ............................................. 7

AUDIBLE ALARM .............................................................................7

BACKLIGHT .....................................................................................8

POWER SUPPLY .............................................................................. 8

WATCH FEATURES & DISPLAYS .......................................................9

LOCAL DEFAULT TIME .................................................................10

MAIN TIME ...................................................................................... 10

WATCH ALT .................................................................................... 10

SET MAIN TIME .............................................................................. 10

Set Date Format .........................................................................10

Set Hour Format ........................................................................10

Set Time......................................................................................11

Set Date ...................................................................................... 11

ALTERNATE TIME .......................................................................... 11

Set Alternate Time ..................................................................... 11

WATCH CDT (COUNTDOWN TIMER) STATUS............................. 11

Set CDT ......................................................................................12

CHRONOGRAPH STATUS ............................................................. 12

DAILY ALARM STATUS .................................................................12

Set Daily Alarm .......................................................................... 12

DIVE COMPUTER FEATURES & DISPLAYS .................................... 13

BAR GRAPHS ................................................................................14

ALPHA/NUMERIC DISPLAYS ........................................................14

DIVE COMPUTER SURFACE MODES ..............................................15

OPERATING MODES .....................................................................16

SURFACE MODE ...........................................................................16

NORM SURF MAIN.........................................................................16

NORM SURF ALT 1 ........................................................................16

NORM SURF ALT 2 ........................................................................16

NORM PLAN MODE .......................................................................21

FLY MODE ......................................................................................21

DESAT MODE .................................................................................22

NORM/GAUG LOG MODE ............................................................. 22

HISTORY MODE ............................................................................. 23

NORM DIVE MODES ..........................................................................24

DIVE TIME REMAINING (DTR) ...................................................... 25

No Deco Time Remaining (NDC) ..............................................25

O2 Time Remaining (OTR) ........................................................25

ASCENT RATE INDICATOR (ASC)................................................25

NORM NO DECOMPRESSION DIVE MODE .................................25

NORM NO DECO MAIN..................................................................25

NORM NO DECO ALTS ..................................................................25

NO DECO DEEP STOP .................................................................. 26

NO DECO SAFETY STOP .............................................................. 26

CAUTIONARY MODES .......................................................................27

DECOMPRESSION ........................................................................28

CONDITIONAL VIOLATION (CV) ................................................... 28

DELAYED VIOLATION 1 (DV1) ......................................................29

DELAYED VIOLATION 2 (DV2) ......................................................29

DELAYED VIOLATION 3 (DV3) ......................................................29

VIOLATION GAUGE MODE (VGM) ................................................30

HIGH PO2 .......................................................................................30

HIGH O2 .......................................................................................... 31

SWITCHING GAS MIXES ...................................................................32

SWITCHING (NORM)......................................................................33

GAUGE OPERATING MODE ............................................................. 34

SURF MAIN.....................................................................................35

SURF ALT .......................................................................................35

DIVE MAIN ......................................................................................35

DIVE ALT ........................................................................................ 35

DELAYED VIOLATION 3 (DV3) ......................................................35

NORM/GAUG SET MODES............................................................17

Setting FO2 for Nitrox Dives ....................................................17

FO2 Set for Air ........................................................................... 17

SET F GROUP (FO2) ...................................................................... 17

Set FO2 Gas 1 ............................................................................17

Set FO2 Gas 2 ............................................................................17

Set FO2 50% Default .................................................................18

SET A GROUP (ALARMS) .............................................................18

Set Audible Alarm ......................................................................18

Set Depth Alarm .........................................................................18

Set EDT Alarm ............................................................................18

Set NIBG Alarm .......................................................................... 19

Set DTR Alarm ...........................................................................19

Set PO2 Alarm ............................................................................19

SET U GROUP (UTILITIES) ...........................................................19

Set Wet Activation .....................................................................19

Set Units .....................................................................................19

Set NORM Deep Stop ................................................................ 20

Set NORM Safety Stop .............................................................. 20

Set Conservative Factor (CF) ................................................... 20

Set Backlight Duration ..............................................................20

Set Sampling Rate .....................................................................20

SERIAL NUMBER ...........................................................................21

FREE DIVE OPERATING MODE ........................................................36

SURF MAIN.....................................................................................37

SURF ALT 1 ....................................................................................37

SURF ALT 2 ....................................................................................37

FREE CDT (COUNTDOWN TIMER) ............................................... 37

FREE ELAPSED DIVE TIME (EDT) Alarm .................................... 38

FREE DEPTH ALARMS (DA) ......................................................... 38

FREE DIVE MAIN AND ALTS ......................................................... 38

FREE DIVE ALARMS ..................................................................... 39

REFERENCE ......................................................................................41

CARE AND CLEANING .................................................................. 42

INSPECTIONS AND SERVICE .......................................................42

BATTERY REPLACEMENT ............................................................ 42

ALTITUDE SENSING AND ADJUSTMENT .................................... 43

UPLOADING SETTINGS AND DOWNLOADING DATA ................ 43

ERROR (RESET DURING A DIVE) ................................................44

SPECIFICATIONS ...........................................................................45

INSPECTION/SERVICE RECORD ..................................................... 49

AMPHOS DC MANUAL

NOTICES

LIMITED TWO-YEAR WARRANTY

Sherwood Scuba guarantees, to the original purchaser only, that the AMPHOS 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 AMPHOS 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 computer is not registered online at SherwoodScuba.com within 30 days of the purchase date, and if the annual inspection is not done according to this owner’s manual. This warranty is not transferable and applies to the original purchaser only. All correspondence concerning this warranty must be accompanied by a copy of the original sales receipt and the serial number of the device submitted for warranty coverage.

Once each year you must return the AMPHOS 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 verication 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 AMPHOS. Modications or repair by anyone other than a Sherwood Sales and Service Center authorized to service

the AMPHOS 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 AMPHOS 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, modication, or tampering.

This manual is copyrighted, all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine readable form without prior consent in writing from Sherwood Scuba LLC / 2002 Design.

AMPHOS DC Manual, Doc. No. 12-5301

TRADEMARK NOTICE

Sherwood Scuba, the Sherwood Scuba logo, and HydroGlo are registered or unregistered trademarks of Sherwood Scuba LLC. AMPHOS and the AMPHOS logo are trademarks of Sherwood Scuba LLC. All rights are reserved.

PATENT NOTICE

U.S. Patents, registered in the U.S. Patent and Trademark Ofce, have been issued to protect the following design features: Data Sensing and Processing Device (U.S. Patent no. 4,882,678), Dive Time Remaining (U.S. Patent no. 4,586,136), and Ascent Rate Indicator (U.S. Patent no. 5,156,055).

DECOMPRESSION MODEL

The programs within the AMPHOS 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 AMPHOS dive computer model is based upon the latest research and experiments in decompression theory. Still, using the AMPHOS, 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 prole.

AMPHOS DC MANUAL

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 Wisdom 3).

Alternate Display - Additional information accessible by pressing a control button.

Altitude Dive - A dive made at an elevation above sea level (> 3,000 feet/915 meters) when no decompression limits are reduced .

Ascent Rate - The speed that a diver ascends toward the surface.

Ascent Rate Indicator - A display that shows ascent rate as a bar graph.

Audible Alarm - A computer emitted tone that alerts the diver to potential danger.

Battery Indicator - An icon displayed while in Surface Time/Wet Mode, indicates a Low Battery Condition.

Caution Zone - The sections of the Nitrogen Bar Graph , O2 Bar Graph, and Ascent Rate Indicator that give a visual warning of a diver ’s proximity to

decompression limits, oxygen tolerance limits, and ascent rate, respectively.

Ceiling - See decompression ceiling.

Clean Dive - A dive preceded by 24 hours of no diving activity.

CNS - Abbreviation for the Central Nervous System of the body.

Competitive Dive - A dive conducted for prot or prize.

Compartment - A term applied to the hypothetical modeling of nitrogen absorption in the tissues (more accurate than the term “tissue” because dive com-

puter models have no direct relation to human tissues).

DCS - Abbreviation for decompression sickness, i.e., “the bends”.

DECO - Abbreviation for Decompression.

Decompression Ceiling - The shallowest depth a diver may reach upon ascent without risking decompression sickness.

Decompression Stop - The depth(s) at which a diver must pause during ascent to allow absorbed nitrogen to escape naturally from the tissues.

Deep Stop - A depth at which a diver may choose, but is not required, to pause during ascent to allow absorbed nitrogen to escape naturally from the tissues.

Depth Sensor - an electro-mechanical device that converts water pressure into an electrical signal, that is converted to a visual depth display.

Display - A visual readout of information.

Dive Log Mode - A computer display of previous dive information.

Dive Planner - A display of available dive times at 10 foot (3 meter) intervals from 30 to 190 feet. (9 to 57 meters) used when dive planning.

Dive Time Remaining - A display of the time before a diver must surface based on no decompression dive time remaining or O2 time remaining.

Elapsed Dive Time - Total time spent underwater during a dive between 5 feet (1.5 meters) on initial descent to 3 feet (1 meter) on nal ascent.

FO2 - The fraction (percent / 100) of oxygen (O2) in the breathing gas mixture.

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.

Mode - A specic set of functions in a dive computer.

Multi-level Dive - A type of dive prole where the diver spends various times at different depths (opposite of a “Square Wave” dive prole).

Nitrogen Bar Graph - A graphic display of simulated nitrogen absorption on Sherwood dive computers.

Nitrox - A nitrogen-oxygen breathing gas mixture that contains a higher fraction of oxygen than air.

Nitrox Dive - A dive conducted using nitrox (22 to 50 % O2) as the breathing gas.

NOAA - Abbreviation for National Oceanic and Atmospheric Administration.

No Deco - Abbreviation for No Decompression.

No Deco Time Remaining (NDC) - The amount of dive time remaining based on no-decompression status.

No Decompression - Any part of a dive where the diver can surface without requiring a decompression stop.

O2 Bar Graph - A visual representation of oxygen accumulation on a dive computer display.

OTU - Abbreviation for oxygen tolerance unit. A Hamilton's Repex method term for oxygen dose.

Out of Range - The point at which a dive computer can no longer supply correct dive information.

Oxygen Tolerance - Dose or exposure to the physiological affects of elevated levels of oxygen.

Oxygen Toxicity - The adverse physiological affects of exposure to elevated levels of oxygen.

Partial Pressure - The proportion of the total pressure contributed by a single gas in a mixture of gases.

PO2 - Partial pressure of oxygen. The proportion of total pressure of a gas mixture contributed by oxygen.

Repetitive Dive - Any dive that takes place within 12 hours of a previous dive.

Safety Stop - A depth at which a diver may choose, but is not required, to pause during ascent to allow absorbed nitrogen to escape naturally from the tissues.

Square Wave Dive - A type of dive prole where the entire dive is spent at one depth between descent and ascent.

Tissue Compartment - See Compartment.

Transducer - An electro-mechanical device in a dive computer that acts as a depth or pressure sensor.

Transition Period - The rst 10 minutes of surface time after ascending above 3 feet (1 meter) from a dive.

go Up

value is Max Depth

value is PO2

Gas #

a Gas is Nitrox

Depth id

DISPLAY ICONS

Depth/Time

is for Stop

Depth id

Bar Graph id

Daily

AL On

Low Batt

AMPHOS DC MANUAL

Time id

Surface Interval

go Down

Total Ascent Time

value is FO2

Time value

Time is No Deco

Temperature

Activ = Activation ALRM = Alarm Alt = Alternate AMPH = Amphos ASC = Ascent Rate Indicator ATA = Atmospheres Absolute AUD = Audible AVAIL = Available BATT = Battery (bAtt) C = Centigrade (temperature) CDT = Countdown Timer CF = Conservative Factor CHRO = Chronograph CV = Conditional Violation D - M = Day - Month DA = Depth Alarm DC = Dive Computer DECO = Decompression DFLT = Default DSP = Deep Stop Preview DS = Deep Stop DSAT = Desaturation (time) DTR = Dive Time Remaining dur = Duration (backlight) DV = Delayed Violation EDT = Elapsed Dive Time EL = Elevation (altitude) ERR = Error F = Fahrenheit (temperature)

ABBREVIATIONS/TERMS

FO2 = Fraction of Oxygen (%) FPM = Feet Per Minute (ascent rate) FREE = Free Dive Mode FT = Feet (depth) GAUG = Digital Gauge Dive Mode (GAU) GLO = Glow (backlight) HR = Hour (Hr) HIST = History Lo = Low (battery) M = Meters (depth) M - D = Month - Day MAX = Maximum MIN = Minutes (min) MPM = Meters Per Minute (ascent rate) NDC = No Deco DTR NDL = No Deco Limit NIBG = Nitrogen Bar Graph NO-D = No Decompression NORM = Normal Dive Mode (Nor) O2 = Oxygen PC = Personal Computer PO2 = Partial Pressure of O2 (ATA) SAFE = Safety (stop) SEC = Seconds (sec) SN = Serial Number SURF = Surface tot = Total VGM = Violation Gauge Mode Vio = Violation (VIOL)

FEATURES

AMPHOS DC MANUAL

DISPLAYS

INTRODUCTION

Welcome to Sherwood and thank you for choosing the AMPHOS !

It is extremely important that you read this Owner's Manual in sequence and understand it completely before attempting to use the AMPHOS as a dive computer.

Remember that 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.

CONTROL BUTTONS

The AMPHOS features 4 Control Buttons that allow you to select mode options and access speciﬁc information. They are also used to enter Settings, activate the Backlight, and acknowledge the Audible Alarm.

Throughout this manual they will be referred to as the M, S, L, and A buttons.

• Upper/Left - Mode (M) button

• Upper/Right - Select (S) button

• Lower/Right - Light (L) button

• Lower/Left - Advance (A) button

OPERATING MODE STRUCTURE

Unless it is operating in Dive Computer mode, the AMPHOS will be On in the default Watch Main Time (home time) mode (Fig.

1), like a standard watch, until the mode is changed.

The M button is used to access 4 other Modes that include Alternate Time Mode, Countdown Timer, Chronograph (stop watch/ lap timer), and Daily Alarm. It is also used to revert to the Local Default Time display and access Computer Modes.

AMPHOS DC MANUAL

BUTTONS

The screens of the Main Modes and Sub Modes will remain on display until a button is pressed to access another screen or Mode, activate a sequence, or for 2 minutes if no button is pressed. The Chronograph remains on display as long as it is running unless another Mode is accessed.

When Wet Activation is set On, the AMPHOS will enter the selected Dive Mode upon descent to 5 FT (feet)/1.5 M (meters) for 5 seconds, regardless of what operating mode it is in.

WARNING: When Wet Activation is set OFF, the AMPHOS must be in Dive Surface Mode (NORM, GAUG, or FREE) prior to the ﬁrst dive of a new series. Commencing a dive while in Watch modes will not activate Dive Mode unless Wet Activation is set ON.

OPERATION AS A DIVE COMPUTER

The AMPHOS features 3 Dive Computer (DC) Operating Modes, NORM (Fig. 2A) which is used for Air and Nitrox dives, GAUG (Fig. 2B) used for dives in which Nitrogen-Oxygen calculations are not performed, and FREE (Fig. 2C) used for breath hold activities that do not use SCUBA.

NORM and GAUG Modes allow access to Fly, Log, History, and Set Modes.

NORM Mode (only) allows access to Desat Mode.

FREE Mode has it's own group of settings. Shared features such as Backlight duration can be set by accessing NORM or GAUG.

AUDIBLE ALARM

Most warning situations that activate the Audible Alarm while operating in NORM or GAUG Mode will sound 1 beep per second for 10 seconds, or until the situation is corrected, or it is acknowledged by pressing and releasing the S button (less than 2 seconds). After being acknowledged and the situation corrected, the Alarm will sound again upon reentry into the warning situation, or entry into another type of warning situation.

FREE Dive Mode has its own set of Alarms which emit 3 beeps either 1 or 3 times which cannot be acknowledged or set Off.

Fig. 1 - WATCH MAIN TIME

The Audible will not be active if it is Set OFF (a group A setting).

Situations that will activate the NORM/GAUG 10 second Alarm include -

• Descent deeper than the Max Depth value selected.

• Dive Time Remaining decreases to the value selected.

• Elapsed Dive Time at the value selected.

• High PO2 increases to the value selected.

• O2 reaches 300 OTU (100% of allowed single or daily exposure).

• Nitrogen Bar Graph at the value (segment) selected.

• NORM/GAUG Ascent Rate Alarm - rate exceeds 60 FPM (18 MPM) when deeper than 60 FT (18 M), or 30 FPM (9 MPM) at 60 FT (18 M) and shallower.

Fig. 2 - SURFACE MAINS

• Entry into Decompression (NORM).

• Conditional Violation (above a required Deco Stop Depth for less than 5 minutes).

• Delayed Violation (above a required Deco Stop Depth for more than 5 minutes).

• Delayed Violation (a Deco Stop Depth greater than 60 FT/18 M is required).

• Delayed Violation (Maximum Operating Depth of 330 FT/100 M is exceeded).

• A Gas Switch to another tank would expose the diver to PO2 greater than 1.60 ATA.

• Watch Daily Alarm reaches time set (on surface only).

• Watch Countdown Timer reaches 0:00 (on surface only).

A single short beep (which cannot be disabled) is emitted for the following -

• Upon completion of a battery change.

• Change from Delayed to Full Violation 5 minutes after the dive.

3 short beeps (which cannot be disabled) are emitted for the following -

• NORM/GAUG Ascent Rate Warning - rate is 51 to 60 FPM (15.1 to 18 MPM) when deeper than 60 FT (18 M), or 26 to 30 FPM (7.5 to 9 MPM) at 60 FT (18 M) and shallower.

• FREE Dive Elapsed Dive Time Alarm - 3 beeps at each 30 second interval, if set On.

• FREE Dive Depth Alarms 1/2/3 (set sequentially deeper) - each 3 beeps 3 times.

• FREE Dive NIBG Alarm (Caution zone, 4 segments) - 3 beeps 3 times.

• Entry into Deco during a FREE Dive (Violation) - 3 beeps 3 times.

• Free Mode Countdown Timer reaches 0:00 - 3 beeps 3 times.

During the following NORM Dive situations, the 10 second continuous tone will be followed by a 5 second steady beep that cannot be acknowledged/silenced -

• Ascending above a required Decompression Stop Depth for more than 5 minutes (referred to as a Delayed Violation).

• Decompression requires a Stop Depth of 70 FT (21 M) or deeper.

• Being on the Surface for 5 minutes after a Conditional Violation.

BACKLIGHT

To activate the Backlight, press the L (lower/right) button.

• The Backlight will activate and illuminate the display for button depression time* plus the Duration time set (0, 5, or 10 seconds) for a maximum of 20 seconds.

*The Backlight turns Off if the button is held depressed for more than 10 seconds.

• Press L again to activate as desired.

AMPHOS DC MANUAL

Fig. 3 - LOW BATTERY

WARNING

NOTE: Extensive use of the Backlight reduces estimated Battery life. Also, the Backlight does not operate during a Low Battery condition or when the AMPHOS is connected to a PC.

POWER SUPPLY

The AMPHOS uses (1) 3 volt CR2430 Lithium Battery. Used as a Dive Computer, the battery should operate normally for 1 year

Fig. 4 - LOW BATTERY

ALARM

or 300 dive hours if 2 dives are conducted during each dive period. Voltage is checked every 2 minutes on the surface.

• If voltage decreases to the Warning level (2.75 volts), the Battery icon will appear on Surface Main (Fig. 3a) as an indication that the Battery should be changed prior to commencing a series of dives.

• If the voltage decreases to the Alarm level (2.50 volts), the Battery icon will ﬂash and the message CHANGE BATT will ﬂash (Fig. 4) for 5 seconds, then operation will revert to Watch Main Time. The AMPHOS would then only operate in Watch modes until the Battery becomes completely depleted.

• Low Battery conditions are not displayed during dives.

• If a Low Battery Condition was not displayed prior to starting a Dive, and a Low Battery Condition occurs during the dive, there will be sufﬁcient Battery power remaining to maintain operation for the remainder of that dive.

WARNINGS AND SAFETY RECOMMENDATIONS

• It should not be considered that the capabilities built into the AMPHOS provide an implied approval or consent from Sherwood for individuals to exceed the dened limits for recreational diving, as agreed on by all internationally recognized training agencies.

• The oxygen features of the AMPHOS are intended for use by recreational divers trained for Nitrox diving by an instructor certied by a recognized training agency to teach diving with Nitrox.

• Conducting repetitive dives using enriched nitrogen-oxygen mixtures can lead to oxygen buildup, reducing oxygen tolerance while increasing the risk of pulmonary oxygen toxicity.

• The AMPHOS provides information based upon a personal dive prole, and therefore must not be shared between divers. It is impossible for two divers to stay precisely together underwater, and your computer's dive prole tracking of previous dives will be pertinent to you only. Nitrogen and oxygen loading of a second user may be signicantly different and swapping dive computers could lead to inaccurate and dangerous predictions of decompression and oxygen accumulation status.

WATCH

AMPHOS DC MANUAL

FEATURES & DISPLAYS

LOCAL DEFAULT TIME

Watch Main Time (Fig. 5) is the current Time at your home location and is normally selected as the Local Default Time.

The normal Watch screen sequence accessed with momentary presses (less than 2 seconds each) of the M button is -

Main Time >> Alternate Time >> Countdown Timer >> Chronograph >> Daily Alarm

AMPHOS DC MANUAL

Watch Alternate Time (Fig. 6), which is set by Hour Differential, is the current Time at a remote travel location. Upon arrival

at the location, Alternate Time can be interchanged with Main Time to make it the Local Default Time.

While viewing Alternate Time, depressing the S button for 2 seconds will replace Main Time with Alternate Time that will then become the Local Default Time until changed.

While viewing any of the Watch Mode displays, depressing the M button for 2 seconds or if no button is pressed for 2 minutes, operation will revert to the Watch Default Time screen selected.

MAIN TIME, information displayed includes (Fig. 7):

> Daily Alarm icon (clock) if it is set On (Fig. 7a). > Time of Day (hr:min:sec) with P icon (if PM), no icon if AM or if 24 Hour Format. > Day of the Week graphic MON (or TUE, WED, THU, FRI, SAT, SUN). > Battery icon, if a Low Battery Condition exists. > Nitrogen Bar Graph, if any after NORM/FREE dives.

• M (< 2 sec) will access Watch ALT Time (remote, set for travel location).

• M (2 sec) will access Dive Computer Surface Mode (NORM, GAUG, or FREE).

• A (< 2 sec) will access NORM/GAUG Log and History Modes.

• A (2 sec) will access the ALT (Alternate) screen (Elev, Temp, Date).

• S (< 2 sec) will silence/acknowledge the Daily Alarm.

• L (press) will activate the Backlight.

• A + S (simultaneously 2 sec) will access the Set Time menu.

WATCH ALT, information includes (Fig. 8):

> Altitude graphic (EL2 to EL7), if above 3000 feet (915 meters), blank if Sea level. > Date (Month.Day or Day.Month). > Temperature with ° icon and graphic F (or C).

Fig. 5 - MAIN TIME

Fig. 6 - ALTERNATE TIME

Fig. 7 - MAIN TIME

(12 Hour Format)

• After 5 seconds, operation will revert to the Watch Time screen.

• A (< 2 sec) will revert to the Watch Default Time screen.

• L (press) will activate the Backlight.

SET MAIN TIME This mode allows the Date and Time of Day to be set which will also serve as the basis for Watch Alternate Time values.

> Set items include Date Format, Hour Format, Time, and Date > Day of the Week is set automatically when the Date is set. > When the AMPHOS is operating in Dive Computer mode, Date is displayed only to identify dives when they are accessed in

the Log Mode

• A (repeatedly, < 2 sec each time) will step through the menu items.

• M (2 sec) at any time, or if no button is pressed during a period of 2 minutes, operation will revert to Watch Default Time.

Set Date Format

While viewing the Watch Default Time screen, depressing the A and S buttons simultaneously for 2 seconds will access the Set Date Format screen displaying the graphic SEt and the Set Point M - D (or D - M) ﬂashing (Fig. 9).

> M - D means that Month will be displayed to the left of Day. > D - M means that Day will be displayed to the left of Month.

• S (< 2 sec) will toggle between M - D and D - M.

• A (< 2 sec) will save the setting and access Set Hour Format.

Set Hour Format

The Set Hour Format screen displays the graphic SEt with the Set Point 12HR (or 24HR) ﬂashing (Fig. 10).

• S (< 2 sec) will toggle between 12 and 24.

• A (< 2 sec) will save the setting and access Set Time.

Fig. 8 - WATCH ALT

Fig. 9 - SET DATE FORMAT

Fig. 10 - SET HOUR FORMAT

Set Time

The Set Time screen displays the graphics SEt and TIME with the Time of Day (hr:min) with the Hour digits ﬂashing (Fig. 11). The graphic P is displayed when PM, no graphic if AM or 24 Hour Format.

• S (press/hold) will scroll upward through the Hour Set Points in 1 hour increments at a rate of 8 per second.

• S (< 2 sec) will step upward through the Set Points one at a time.

• A (< 2 sec) will save the Hour setting and ﬂash the Minute digits.

• S (press/hold) will scroll upward through the Minute Set Points in 1 minute increments at a rate of 8 per second.

• S (< 2 sec) will step upward through the Set Points one at a time.

• A (< 2 sec) will save the Minute Set Point and access Set Date.

Set Date

The Set Date screen displays the graphic SEt and Month.Day (or Day.Month) with the Year digits ﬂashing (Fig. 12).

• S (press/hold) will scroll upward through the Year Set Points in 1 Year increments at a rate of 8 per second from 2011 to 2054 (with leap year corrections).

• S (< 2 sec) will step upward through the Year Set Points one at a time.

• A (< 2 sec) will save the Year setting and ﬂash the Month digits (regardless of their position on the display).

• S (press/hold) will scroll upward through the Month Set Points in 1 month increments at a rate of 8 per second.

• S (< 2 sec) will step upward through the Month Set Points one at a time.

• A (< 2 sec) will save the Month Set Point and ﬂash the Day digits.

• S (hold) will scroll upward through the Day Set Points in 1 Day increments at a rate of 8 per second.

• S (repeatedly, < 2 sec each time) will step upward through the Day Set Points one at a time.

• A (< 2 sec) will save the Date setting and revert to Watch Default Time.

> Year will not be displayed in any mode other than Set Date. > Main Time/Date can also be set using the PC Interface program. > Prior to shipment from the factory, any error of the Main Time is corrected.

AMPHOS DC MANUAL

Fig. 11 - SET TIME

Fig. 12 - SET DATE

ALTERNATE TIME, information includes (Fig. 13):

> Alarm icon, if the Daily Alarm is set On, blank if Off. > Graphic ALt, indicating Time as Alternate (remote location). > Time of Day (hr:min:sec), blank if Off. > Day of the Week graphic MON (or TUE, WED, THU, FRI, SAT, SUN), or OFF.

• S (< 2 sec) will silence/acknowledge the Daily Alarm.

• S (2 sec) will interchange ALT Time with Main Time making ALT Time the local Watch Default Time screen.

• A + S (2 sec) will access Set ALT Time.

• M (< 2 sec) will access the Watch CDT Status (Countdown Timer).

• M (2 sec) will revert to the Watch Default Time screen.

• L (press) will activate the Backlight.

Set Alternate Time

• ALT TIME can be set OFF, or to an Hour Differential ranging from + 1 through +23 through - 23 through -1 (hours).

• Once the Differential is selected and saved, values of ALT Time will be based upon the Main Time setting.

Information includes (Fig. 14):

> Graphics SEt and ALt. > Graphic OFF (or numeric value) ﬂashing.

• S (press/hold) will scroll through the Set Points in increments of 1 Hour at a rate of 8 per second.

• S (< 2 sec) will step upward through the Set Points one at a time.

• A (< 2 sec) will save the Set Point and revert to the Watch ALT Time screen.

• M (2 sec) will revert to the Watch Default Time screen.

• If no button is pressed during a period of 2 minutes, operation will revert to the Watch Default Time screen.

WATCH CDT (COUNTDOWN TIMER) STATUS, information includes (Fig. 15, 16):

> Graphic OFF (or ON) ﬂashing, with 0:00 if no time was previously set, the remaining Countdown Time (hr:min) if running,

or the Countdown Time previously set.

> Graphic CDT.

• S (< 2 sec) will toggle between ON and OFF. A toggle to ON will Start the Timer if a Time has been set.

>> If OFF is selected, the CD Time in progress will stop counting down. Access to Set will be allowed.

>> If ON is selected, the CD Time displayed (time previously set, or the time remaining when stopped) will start counting

down. Access to Set will be blocked.

• A + S (2 sec) will display the graphic SEt in place of OFF, allowing the Time to be set.

• M (< 2 sec) will access Chrono.

• M (2 sec) will revert to the Watch Default Time screen.

• L (press) will activate the Backlight.

Fig. 13 - ALTERNATE TIME

Fig. 14 - SET ALTERNATE

TIME

Fig. 15 - CDT STATUS

(no time set)

Once set ON, a CDT will run in the background (on surface) until turned OFF, or it counts down to 0:00 at which time the alarm will strike. Upon entry into Dive Mode the CDT will turn OFF with the Time reverting to the value previously set.

Fig. 16 - CDT STATUS

(running)

Set CDT, information includes (Fig. 17):

> Graphic SEt with last Time (hr:min) set, Hour digits ﬂashing. > Graphic CDT.

• S (press/hold) will scroll upward through the Hour Set Points in 1 hour increments at a rate of 8 per second.

• S (< 2 sec) will step upward through the Set Points one at a time.

• A (< 2 sec) will save the Hour setting and ﬂash the Minute digits.

• S (press/hold) will scroll upward through the Minute Set Points in 1 minute increments at a rate of 8 per second.

• S (< 2 sec) will step upward through the Set Points one at a time.

• A (< 2 sec) will save the Minutes setting and revert to the CDT Status screen with the graphic OFF ﬂashing in place of SEt.

• S (< 2 sec) will toggle from OFF to ON, starting countdown.

• M (2 sec), or no button press for 2 min, will revert to Watch Default Time.

CHRONOGRAPH STATUS (Stop Watch, Lap Timer), information includes (Fig. 18, 19):

> 0:00:00.00, or total elapsed run time (hr:min & sec. 1/100th sec) if previously started and running. > Graphic CHRO if not running, or LAP1 (2 to 9, the one in progress) if running.

• S (< 2 sec) will Start the Timer which will begin counting up from 0:00:00.00 to 9:59:59.99 (hr:min_ _sec.1/100th sec) in increments of .01 (1/100th sec).

During the ﬁrst 4 seconds the 1/100th second values will be displayed after which 2 dashes ( . - - ) will be displayed. The 1/100th values will be recorded and displayed when Laps are frozen and when later recalled.

• Subsequent presses of S (< 2 sec) will freeze Lap Times (LAP 1 through LAP 9). After 9 Laps are recorded, additional Laps will replace LAP 9, shift the others to lower LAP numbers, while discarding LAP 1.

If the Timer reaches 9:59:59.99, it will stop and save that as a LAP. Subsequent presses of S will then have no effect.

AMPHOS DC MANUAL

Fig. 17 - SET WATCH CDT

sec_.01 sec

Fig. 18 - CHRONO STATUS

(not running)

hr:min

• A (< 2 sec) will Stop the Timer and Recall LAP 1, displaying the graphic LAP1 and Lap Time. Repeat presses will display other Laps (2 to 9).

• A (2 sec) will Stop the Timer and Reset the Time to 0:00:00.00.

• M (< 2 sec) will access Daily Alarm Status.

• M (2 sec), or no button press for 2 min, will revert to Watch Default Time.

While the Chrono is running, it will remain on the screen until a button operation is performed. If another screen is accessed, it will then continue to run in the background.

Upon descending on a dive, Chrono operation will be terminated and reset to 0:00:00.00.

DAILY ALARM STATUS, information includes (Fig. 21):

> Graphic ON (or OFF), ﬂashing. > Alarm Time last set (hr:min) with A (or P) icon. > Graphic ALRM and alarm icon.

• S (< 2 sec) will toggle between ON and OFF.

>> If OFF is selected, alarm activation is disabled. Access to Set will be allowed. >> If ON is selected, the alarm time set is enabled. Access to Set will be blocked.

• A + S (2 sec) will display the graphic SEt in place of OFF, allowing the Time to be set.

• M (< 2 sec) will revert to Watch Default Time.

• M (2 sec), or no button press for 2 min, will revert to Watch Default Time.

• L (press) will activate the Backlight.

Set Daily Alarm, information provided includes (Fig. 22):

> Graphic SEt. > Alarm Time previously set (hr:min), Hour digits ﬂashing. > Graphic ALRM and alarm icon.

• S (press/hold) will scroll upward through the Hour Set Points in 1 hour increments at a rate of 8 per second.

• S (< 2 sec) will step upward through the Set Points one at a time.

• A (< 2 sec) will save the Hour setting and ﬂash the Minute digits.

• S (press/hold) will scroll upward through the Minute Set Points in 1 minute increments at a rate of 8 per second.

• S (< 2 sec) will step upward through the Set Points one at a time.

• A (< 2 sec) will save the Minutes setting and revert to the Daily Alarm Status, the graphic OFF ﬂashing in place of SEt.

• S (< 2 sec) will toggle from OFF to ON, starting countdown.

Fig. 19 - CHRONO STATUS

(Lap in progress)

Fig. 20 - LAP RECALL

Fig. 21 - DAILY ALARM

Fig. 22 - SET DAILY ALARM

Once the Daily Alarm has been set and turned ON, it will run in the background while on the surface until turned OFF. Alarm time is synchronized with the local Default Time selected for the current location. It will also run in the background while in Dive Computer modes but will not sound the audible or ﬂash the icon when the alarm time is reached during dives.

DIVE COMPUTER

AMPHOS DC MANUAL

FEATURES & DISPLAYS

BAR GRAPHS

The AMPHOS features 2 bar graphs, one on each side of the LCD.

• The one on the left (Fig. 23a) is dual function. It represents either Nitrogen loading or Oxygen accumulation. The icons N2 and O2 identify which is displayed at that time.

Regardless of which parameter the Bar Graph is representing at the time,

nitrogen and oxygen calculations will continue to be performed in the background.

• The one on the right (Fig. 23b) represents Ascent Rate. It is referred to as the ASC (Ascent Rate Indicator).

NIBG (Nitrogen Bar Graph)

The NIBG represents tissue loading of nitrogen, showing your relative no decompression or decompression status. As your depth and elapsed dive time increase, segments will add to the NIBG, and as you ascend to shallower depths, the segments will recede, indicating that additional no decompression time is allowed for multilevel diving.

The NIBG monitors 12 different nitrogen compartments simultaneously and displays the one that is in control of your dive. It is divided into a No Decompression (normal) zone, a Caution zone (also No Decompression), and a Decompression (danger) zone.

While you cannot provide a guarantee against the occurrence of decompression sickness, you may choose your own personal zone of caution based upon age, physique, excessive weight, etc., to reduce the statistical risk.

NOTE: Information associated with oxygen and the O2BG will only be displayed when FO2 has been set for Nitrox (e.g., a numerical value).

Oxygen Bar Graph (O2BG)

The O2BG represents oxygen accumulation, showing the maximum of either per dive accumulated oxygen, or 24 hour period accumulated oxygen.

As your oxygen exposure (accumulation) increases during the dive, segments will add to the O2BG, and as saturation decreases, it will begin to recede, indicating that additional exposure is allowed for that dive and 24 hour period.

AMPHOS DC MANUAL

Fig. 23 - BAR GRAPHS

ASC values

Deeper than 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) & Shallower 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

Ascent Rate Indicator (ASC)

The ASC provides a visual representation of ascent speed (i.e., an ascent speedometer).

The segments of the ASC represent two sets of speeds that change at a reference Depth of 60 FT (18 M).

See chart at right.

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).

ALPHA / NUMERIC DISPLAYS

Depth

During dives, the Current Depth display (Fig. 24a) and Maximum Depth which is on an Alternate Display (Fig. 25a) indicate Depths from 0 to 330 FT (100 M) in increments of 1 FT (0.1 M).

No Deco Deep and Safety Stops, as well as Decompression Stops, display required Stop Depths.

Time and Date

Most Time displays like Time of Day (Fig. 25b) are shown in hour:minute format (i.e., 9:56 represents 9 hours and 56 minutes, not 956 minutes!). The colon that separates hr:min (min;sec) blinks once per second when the display is indicating real time (e.g., Time of Day).

Other times displayed include NDC (No Deco Time Remaining, Fig. 26a), and EDT (Elapsed Dive Time, Fig. 26b).

No Deco Stops and FREE Dive Mode times are displayed in minute:second format.

Temperature, Date, Elevation

Elevation, Date, and Temperature can be viewed by accessing the Watch Alternate Display (Fig. 27).

The only other place that Date is displayed is on Log Preview screens that identify dives (Fig. 28a).

Fig. 24 - DEPTH

Fig. 25 - MAX DEPTH, TIME

Fig. 26 - NDC, EDT

When above the sea level range, which extends up to 3000 feet (915 meters), Altitude is displayed as EL (Elevation Level) from 2 up to 7.

EL2 = 3,01 to 5000 feet (916 to 1525 meters) EL3 = 5001 to 7000 feet (1526 to 2135 meters) EL4 = 7001 to 9000 feet (2136 to 2745 meters) EL5 = 9001 to 11000 feet (2746 to 3355 meters) EL6 = 11001 to 13000 feet (3356 to 3965 meters) EL7 = 13001 to 14000 feet (3966 to 4270 meters)

Fig. 27 - ELEV, DATE, TEMP

Fig. 28 - DATE

DIVE COMPUTER

AMPHOS DC MANUAL

SURFACE MODES

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