Oceanic Data Plus Manual

Oceanic Duikcomputer Data Plus

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owner's guide

DATA PLUS™

OCEANIC

DataPlus

iii

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 Owner's Guide

Thoroughly Before Using the DataPlus.

Responsible

WARNINGS:

• The DataPlus 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) 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 DataPlus 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 guide completely before diving with the DataPlus.

• 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 Oceanic dealer before you utilize this product.

Pay special attention to items marked with this Warning symbol.

DataPlus

LIMITED TWO-YEAR WARRANTY

Oceanic guarantees, to the original purchaser only, that the DataPlus 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 DataPlus prove to be defective for any reason (other than those listed in the limitations section below) it will

be repaired or replaced (at Oceanic’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 Oceanic within

30 days of purchase, and/or if the annual inspection is not done according to this owner’s guide. 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 DataPlus to an Authorized Oceanic 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 DataPlus. Modifications or repair by anyone other than an Oceanic Sales & Service

Center authorized to service the DataPlus will void the warranty. Oceanic will not be responsible for recovery or replacement of the product in

the event of loss or theft. Oceanic, its distributors, and retailers make no warranties, either expressed or implied, with respect to this product

or its owner’s guide except those stated in the preceding paragraphs. In consideration of the sale of the DataPlus to you, you agree and

understand that in no event will Oceanic, 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 Oceanic 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 plastic gauge face, o-rings, batteries, or damage due to accident, abuse, modification, or tampering.

This owner’s guide 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 Oceanic / 2002 Design. The Surface

Time/Mode, Plan Mode, No Decompression Time, Decompression Stop Time, Dive Log, Low Battery, Bottom Time, Maximum Depth,

Ascent Rate, and Caution Zone icons are protected by copyright, and are trademarks of Oceanic.

DataPlus Owner's Guide, Doc. No. 12-1968

2002 Davis Street

San Leandro, Ca. USA 94577

510/562-0500

TRADEMARK NOTICE

Oceanic, the Oceanic logo, DataPlus, the DataPlus logo, Oceanglo, DataLink, Diving Essentials Redefined, Graphic Diver Interface, Tissue

Loading Bar Graph, Pre Dive Planning Sequence, and Variable Ascent Rate Indicator are all registered and unregistered trademarks of

Oceanic. All rights are reserved.

PATENT NOTICE

U.S. Patents have been issued, or applied for, to protect the following design features:

Graphic Diver Interface, Pre Dive Planning Sequence, Data Sensing and Processing Device (U.S. Patent no. 4,882,678), Tissue Loading Bar

Graph (U.S. Patent no. 4,882,687), and Variable Ascent Rate Indicator Bar Graph (U.S. Patent no. 5,156,055).

DECOMPRESSION MODEL

The programs within the DataPlus 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 DataPlus dive computer model is based upon the latest research and

experiments in decompression theory. Still, using the DataPlus, 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.

DataPlus

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CONTENTS

FEATURES OVERVIEW .............................................................. 1

Introduction ..................................................................................................................2

Regulator Attachment..................................................................................................4

Activating the Display ..................................................................................................4

Programming Nitrox Mixes (FO2) ..............................................................................6

Making a Dive ...............................................................................................................7

After the Dive .............................................................................................................11

Knowing When to Fly.................................................................................................13

Altitude Diving ...........................................................................................................14

Sharing the DataPlus .................................................................................................15

LCD Display Legend...................................................................................................16

DETAILED OPERATIONS ........................................................ 17

Informational Displays...............................................................................................18

Depth Display .............................................................................................................18

Time Display ...............................................................................................................19

Graphic Diver Interface™ ..........................................................................................21

Tissue Loading Bar Graph® (TLBG) .........................................................................21

Oxygen Accumulation (O2) Bar Graph .....................................................................22

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CONTENTS (CONTINUED)

Variable Ascent Rate Indicator™ (VARI) ..................................................................24

Operational Modes......................................................................................................25

Activation & Diagnostic Mode ...................................................................................26

Surface Mode ..............................................................................................................27

Pre Dive Planning Sequence™ (PDPS) .....................................................................29

No Decompression Dive Mode ...................................................................................31

Decompression Dive Mode .........................................................................................33

High PO2 Dive Mode..................................................................................................34

Violation Modes ..........................................................................................................34

Gauge Mode ................................................................................................................35

Ascending to the Surface............................................................................................35

Dive Log Mode ............................................................................................................36

Time to Fly Mode........................................................................................................38

External Access (EA) Mode........................................................................................40

Backlight Feature .......................................................................................................41

Ambient Temperature Display ..................................................................................41

Operating Temperature .............................................................................................42

HANDLING THE EXTREMES.................................................. 43

Emergency Decompression ........................................................................................44

Caution Zone (TLBG).................................................................................................46

DataPlus

Decompression Dive Mode .........................................................................................47

Violation Modes ..........................................................................................................50

Conditional Violation Mode .......................................................................................50

Delayed Violation Mode..............................................................................................51

Immediate Violation Mode .........................................................................................54

Gauge Mode ................................................................................................................55

Permanent Violation ..................................................................................................55

Exceeding Maximum Operating Depth.....................................................................56

Oxygen Exposure........................................................................................................57

High O2 Accumulation...............................................................................................59

High PO2 Dive Mode..................................................................................................60

Unexpected Loss of Displayed Information ..............................................................61

CARE & MAINTENANCE.......................................................... 63

Care and Cleaning ......................................................................................................64

Annual Dealer Inspections & Factory Service ..........................................................66

Obtaining Factory Service..........................................................................................67

Battery Life .................................................................................................................68

Low Battery Condition ...............................................................................................69

Battery Removal .........................................................................................................69

Battery Installation ....................................................................................................71

CONTENTS (CONTINUED)

Flooded Battery Compartment ..................................................................................72

Inspection....................................................................................................................73

Returning the Module To Its Boot.............................................................................73

REFERENCE .............................................................................. 75

More About Flying After Diving................................................................................76

More About Altitude Diving.......................................................................................77

More About Nitrox Diving .........................................................................................78

Multiple Tissue Tracking ...........................................................................................80

No Decompression Limits ..........................................................................................82

Repetitive Decompression Diving..............................................................................82

Responsible Computer Diving ...................................................................................84

Specifications ..............................................................................................................85

Glossary.......................................................................................................................88

Index............................................................................................................................92

DataPlus Service Record ............................................................................................94

FEATURES

OVERVIEW

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INTRODUCTION

Welcome to Oceanic and thank you for choosing the DataPlus!

Your new DataPlus presents the information that you need before, during, and

after your air (or nitrox) dives using Oceanic's intuitive combination of easy to

read digital displays and unique identification icons.

Tissue loading of nitrogen, accumulation of oxygen, and ascent rate are pre-

sented as segmented bar graphs alongside color coded reference indicators that

bring quick focus to these important status displays.

As you progress through this instructional guide, you will become familiar with

all of the unique functions and features available and see examples of the dis-

plays that you could expect to see in the DataPlus' various operational modes.

The initial time that you invest becoming acquainted with your new DataPlus

will be returned as you enjoy your underwater activities with the comfort that

your familiarization affords.

The DataPlus' wide array of features are described in detail throughout the

pages that follow. Due to the importance that they be understood thoroughly

prior to using the DataPlus, information will be expanded upon and some

refreshed as you proceed. Relax and read through the complete guide.

DataPlus

It is extremely important that you:

• Read this owner's guide in sequence and understand it completely

before attempting to use the DataPlus.

• Check the DataPlus frequently during your dive.

• You must also be a trained diver, certified by a recognized training agency in

Scuba diving.

• Prior to using the oxygen related features of the DataPlus, you must also be

trained and certified for diving with enriched nitrogen-oxygen (nitrox) mix-

tures by a recognized agency.

Remember that the rules you learned in your basic scuba certification course 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.

WARNING: Inspect your DataPlus prior to every dive, checking

for any signs of the entrance of moisture, damage to the button

membrane, or damage to the LCD display. If any signs of damage

are found, return the unit to an Authorized Oceanic Dealer. DO

NOT attempt to use it until it has received factory service.

Be a -

RESPONSIBLE DIVER

at all times.

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REGULATOR ATTACHMENT

If you have purchased the DataPlus in a console version, you will need to have it

attached to your regulator first stage by an Authorized Oceanic Dealer.

ACTIVATING THE DISPLAY

You activate the DataPlus by pressing and releasing the control button located

below the display (Fig. 1a). Depressing and holding the control button for 8

seconds will allow you to enter the External Access Mode used when you down-

load (copy) dive data from the DataPlus to the OceanLink™ PC software logging

program that is available separately. Depressing the button during the Dive

Mode will activate the unit's temperature and Oceanglo® backlight features.

After a diagnostic check that lasts several seconds, the DataPlus advances

through a sequence of displays, called the Surface Sequence, that will repeat

continually until a dive is made, or until the unit shuts off automatically. First

to appear will be Surface Mode, followed by FO2, then PO2 (if FO2 is 'set'), and

the Pre Dive Planning Sequence. After a dive is made, Time to Fly will appear

prior to FO2. These displays will all be explained as you read through this guide.

The 'pre dive' Surface Mode identified by the Surface Mode icon (Fig. 1b) and

the number "0" indicating that no dive has been made since activation. The

Fig. 1 - Surface Mode

DataPlus

Surface Time display will start counting up from 0:00. If no dive is made within

2 hours (2:00) after activation, the unit will automatically shut off.

After displaying the Surface Mode for several seconds, the DataPlus advances to

the display FO2 and Air for 5 seconds (Fig. 2) during which time percentage

O2 for that dive's nitrox mix can be programmed (set) by pressing and holding

the control button. If you set FO2 for a value other than 'Air', the DataPlus will

advance to the PO2 display (Fig. 3) that shows the Maximum Depth that can be

achieved with an oxygen partial pressure of 1.60 BAR for the FO2 value set. If

FO2 is set for 'Air', the PO2 display will not appear.

Next the DataPlus advances to a Plan Mode (Fig. 4) referred to as the Pre Dive

Planning Sequence or PDPS signified by the PDPS icon (Fig. 4a). The PDPS

displays a sequence of depths from 30 to 160 feet (9 to 48 meters) in 10 foot (3

meter) increments. Each depth is displayed with its corresponding available

adjusted no decompression limit for 3 seconds.

After completing the PDPS, the Surface Sequence will repeat over and over

again until you dive.

WARNING: The DataPlus must be manually activated and be in

the Surface Mode or PDPS Mode prior to start of a dive. The

unit will not activate automatically by immersion in water.

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Fig. 2 - FO2

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Fig. 3 - PO2

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Fig. 4 - PDPS

PROGRAMMING NITROX MIXES

WARNING: FO2 must be set 'before each' nitrox dive.

The DataPlus can be used either as an Air computer or a Nitrox computer. To

program the percentage O2, press and hold the control button when 'FO2' - 'Air'

appears during the Surface Sequence. The percentage O2 will advance 1% per

second from 21 to 50 (%) and display 'Air', then repeat until you release the

button.

If you are using Air as your breathing gas, set FO2 for 'Air', or leave it set for

'Air' after activation. When set with an FO2 value of 'Air', the DataPlus will

perform calculations the same as if FO2 were set for 21% O2, internally account-

ing for oxygen loading for any subsequent Nitrox dives. Oxygen related displays,

warnings, and the O2 bar graph will not appear on the LCD display for that dive

(Fig. 5), or subsequent dives, unless FO2 is set for a numerical value (21 to 50).

You can program the DataPlus for enriched nitrogen-oxygen (nitrox) mixtures of

21% to 50% oxygen (O2) before each nitrox dive. If FO2 is set at a value of 21%,

the unit will remain set as a '21% Nitrox computer' for subsequent nitrox dives

until FO2 is set to a higher value. Once FO2 is set to a value 'greater than' 21%

for a nitrox dive, the FO2 value displayed during the post dive Surface Sequence

that appears 10 minutes after that dive will be 50 (Fig. 6).

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Fig. 5 - No Decompression

Dive Mode (Air)

Fig. 6 - FO2 = 50%

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DataPlus

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FO2 must be reset for each repetitive nitrox dive, or the value will automatically

be 50 and the dives will be calculated based on 50% O2 for oxygen calculations

and 21% O2 (79% nitrogen) for nitrogen calculations. Once a dive is made with

the DataPlus set as a nitrox computer (FO2 set for a numerical value), the unit

cannot be programmed to operate as an 'Air' computer until 24 hours after the

last dive. 'Air' will not be displayed as an option when FO2 appears.

MAKING A DIVE

Once you enter the water and descend to a depth below 5 feet (1.5 m)., the

DataPlus changes to the No Decompression Dive Mode (Fig. 7) signified by

the No Decompression icon (Fig. 7a). Displayed are current depth, elapsed dive

time (and the Elapsed Dive Time icon), no decompression dive time remaining,

maximum depth reached during the dive (and the Max Depth icon), nitrogen

loading (as the Tissue Loading Bar Graph), oxygen accumulation (as the O2 bar

graph), and ascent rate (as the Variable Ascent Rate Indicator bar graph).

To make it easy to check your dive status on the DataPlus, a color coded system

of graphic displays is used for representation of tissue nitrogen loading, oxygen

accumulation, and ascent rate. This Graphic Diver Interface™ (Fig. 8)

consists of three segmented bar graphs appearing alongside green, yellow and

red perimeter sections that signify normal, caution, and danger zones, respec-

tively.

Fig. 7- No Decompression

Dive Mode

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Fig. 8- Graphic Diver

Interface

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When underwater, you can quickly focus on the three bar graphs to make sure

that they are in the green. You can quickly verify that you’re not getting too

close to the no decompression limit, or the oxygen tolerance limit, or ascending

too fast.

The Tissue Loading Bar Graph® (Fig 9) represents nitrogen loading, showing

your relative no decompression or decompression status. As your depth and

elapsed dive time increase, segments will fill the graph to form an arc along the

left perimeter of the LCD. As you ascend to shallower depths, this bar graph will

begin to recede, indicating that additional no decompression time is allowed for

multilevel diving. The TLBG also assists you with managing decompression by

filling a large red 'ceiling stop required' segment. This is explained in detail in

the Handling the Extremes section.

The TLBG gives a visual representation of just how close you are to the no

decompression limit with a yellow Caution (C.Z.) Zone. This Caution Zone

portion of the TLBG (Fig. 9a) allows you to make a decision regarding safety

stop duration or necessity. While you cannot provide a guarantee against the

occurrence of decompression sickness, you may choose your own personal zone of

caution based on age, physique, excessive weight, etc., to reduce the statistical

risk.

The Oxygen Accumulation (O2) Bar Graph (Fig. 10) represents oxygen

loading, your relative oxygen tolerance dosage (OTU), showing the maximum of

Fig. 10 - O2 Bar Graph

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Fig. 9 - Tissue Loading Bar

Graph (TLBG)

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either per dive allowable O2 or 24 hour period allowable O2. As your exposure,

oxygen tolerance dose (OTU), increases during the dive, segments will fill the

graph to form an arc along the right perimeter of the LCD. As your OTU level

decreases, the bar graph will begin to recede, indicating that additional exposure

is allowed for the dive, or 24 hour period.

The O2 bar graph also assists you with managing high PO2 levels. When partial

pressure of oxygen reaches a value of 1.40 BAR (ATA), the PO2 level will appear

as a digital display on the LCD. Once the partial pressure of oxygen reaches the

maximum allowable limit of 1.60 BAR (ATA), the O2 bar graph's large red

Danger Zone will be displayed (Fig.11a), flashing as a warning until PO2 de-

creases below 1.60 BAR. If additional O2 'exposure' is still allowed for that dive,

or 24 hour period, a gap (Fig. 11b) will be present between those bar graph

segments (Fig. 11c) and the red segment. This is explained in more detail on

page 23 and in the Handling the Extremes section.

When rising towards the surface, the Variable Ascent Rate Indicator™ (Fig.

12) shows how fast you are ascending. The Variable Ascent Rate Indicator

(VARI) will alert you with flashing segments if you enter the red zone, which

represents ascent rates faster than 60 feet (18 meters) per minute. Immediately

slow your ascent when you see the 5 segments flashing.

Even if you have not entered decompression, a safety stop made between 15-20

feet (5-6 meters) is strongly recommended as a standard procedure before Fig. 12 - Variable Ascent

Rate Indicator™ (VARI)

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Fig. 11 - O2 Bar Graph

abc

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completing your ascent. Many divers do this to provide a wider zone of caution

from the no decompression limit.

If your depth or elapsed dive time are such that the TLBG enters the red decom-

pression (DECO) zone, the DataPlus will switch to the Decompression Dive

Mode (Fig. 13) signified with the flashing Decompression Dive Mode icon (Fig.

13a). A decompression stop ceiling will be indicated by the TLBG, and the Stop

Ceiling icon (Fig. 13b). Digital displays are current depth, current required

decompression stop depth and time for that stop depth, and total required ascent

time to the surface (that includes required decompression stop times and vertical

ascent time calculated for a rate of 60 feet (18 meters) per minute).

You must stay at, or slightly below, the ceiling stop depth indicated on

the digital display until the next shallower required ceiling stop depth

appears before ascending any further, or you will increase your risk of

decompression sickness.

After displaying the Decompression Dive Mode for 12 seconds an Alternate

Display (Fig. 14) appears automatically for 3 seconds. The alternate display

replaces required stop depth and time information with maximum depth and

elapsed dive time. Also, the Stop Ceiling icon is replaced by the Max Depth (Fig.

14a) and Elapsed Dive Time icons (Fig. 14b). The two displays will continue to

alternate while you are in the Decompression Dive Mode.

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Fig. 14 - Decompression Dive

Mode (Alternate Display)

Fig. 13 - Decompression Dive

Mode

DataPlus

AFTER THE DIVE

After reaching 3 feet (1 meter) upon ascent, the Surface Mode display (Fig. 15)

will replace the Dive Mode display for 10 minutes. After 10 minutes, the

DataPlus advances through the sequence of surface displays - Time to Fly, FO2,

PO2, PDPS, then back to Surface Mode.

Time to Fly shows a 24 hour countdown for your reference. FO2 will show the

FO2 set point. PO2 will show the maximum depth allowed for the FO2 set point

and your 24 hour O2 dosage. PDPS will show 'adjusted' no decompression limits

based on the nitrogen calculated to have been absorbed during your last dive.

If the DataPlus was set for FO2 of 'Air' or 21% prior to the dive, it will stay set

for 'Air' or 21%, respectively, unless set to a higher value prior to the next dive.

If it was set for a value of FO2 greater than 21% prior to the dive, the FO2 value

displayed will be '50' and subsequent dives will be calculated based on 50% O2

for oxygen calculations and 21% O2 (79% nitrogen) for nitrogen calculations,

unless you set FO2 for another value. You must set the FO2 to match the

specific nitrox mix for each dive.

Calculated dive times and the maximum allowed depth displayed by the PDPS

will increase as the real time surface interval increases after completion of a

dive. The PDPS will only scroll to the maximum depth allowed by the nitrogen

or oxygen limit, whichever is in control. If the DataPlus is basing its calcula- Fig. 15 - Surface Mode

(<10 min after a dive)

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tions on nitrogen loading, only the TLBG will be displayed, or if calculations are

based upon oxygen loading, only the O2 bar graph will be displayed.

Immediately after a dive, various information is stored in the DataPlus’ memory

and can be viewed by accessing the Dive Log Mode. This gives you a opportu-

nity to record data in your log book before it is eventually overwritten by subse-

quent data. Your latest 12 dives are stored and can be viewed by pressing the

control button.

Dive Log Mode signified by the Dive Log icon (Fig. 16a) will automatically scroll

through the latest 12 dives, starting with the most recent dive first. Two screens

are displayed for each dive, one showing data associated with nitrogen and the

other showing data associated with oxygen.

The Nitrogen Log (Fig. 16) displays the dive number (#), surface interval prior

to the dive (and Surface mode icon), maximum depth (and Max Depth icon),

elapsed dive time (and Elapsed Dive Time icon), maximum ascent rate (VARI)

attained at any time during the dive, and end of dive tissue loading (TLBG). The

Oxygen Log (Fig. 17) displays 'FO2', the FO2 value set prior to the dive, and the

maximum level of oxygen loading reached during the dive as the O2 bar graph.

If you have acquired the OceanLink™ PC interface software package, you will be

able to download (copy) dive data from the DataPlus to your personal dive log

that you established in your PC.

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Fig. 17 - Oxygen Log

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Fig. 16 - Nitrogen Log

DataPlus

KNOWING WHEN TO FLY

Due to the present lack of a complete data set derived from actual human

testing, there are different recommendations cited by various scientific organiza-

tions for the amount of time a diver should wait before flying after diving. The

DataPlus follows one of the more conservative of these, cited by Divers Alert

Network (DAN); that divers wait at least 12 hours before flying in pressurized

commercial aircraft, and at least 24, or more, hours if your profiles included

repetitive multi-day or decompression dives. More about flying after diving and

DAN's guidelines is presented on page 76 in the Reference section.

The DataPlus tracks how much surface time has elapsed since you surfaced from

your latest dive. The Time to Fly Mode begins a 24 hour countdown that

starts 10 seconds after a dive (Fig. 18). During the first 12 hours, the countdown

appears for several seconds after the Surface Mode during the Surface Sequence.

During the second 12 hours of the countdown, only the word 'FLY' and the

counter will be displayed (Fig. 19). During this second period, depressing the

control button will reactivate the DataPlus, replacing the Time to Fly countdown

with the Surface Display and scrolling Surface Sequence.

WARNING: Battery removal and replacement will clear the Time

to Fly countdown. Fig. 19 - Time to Fly Mode

(second 12 hours)

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Fig. 18 - Time to Fly Mode

(first 12 hours)

ALTITUDE DIVING

The mathematical model within the DataPlus accounts for the reduced No

Decompression time available at higher elevations based on NOAA (National

Oceanic and Atmospheric Administration) guidelines. When diving in high

altitude lakes or rivers from 2,000 to 14,000 feet (610 to 4,268 meters), the

DataPlus will adjust automatically, providing corrected depth and reduced No

Decompression times.

Also, when above 2,000 feet (610 meters), depth calibration of the unit is auto-

matically changed to read in feet of freshwater rather than feet of seawater. The

DataPlus will not activate at altitudes above 14,000 feet (4,268 meters).

More about altitude diving and NOAA guidelines is presented on page 77 in the

Reference section.

WARNING: Until it has shut itself off, you must not use the

DataPlus at a different altitude than the altitude where it was

originally activated. Doing so will result in an error equal to the

difference in barometric pressure, and possibly a false dive mode

with erroneous data.

Be a -

RESPONSIBLE DIVER

at all times.

DataPlus

SHARING THE DATAPLUS

WARNING: Never participate in sharing or swapping of a dive

computer. Doing so may result in injury or death.

The DataPlus provides information based upon a diver’s personal dive profile,

and therefore must not be “shared” between divers. You should never,

under any circumstances, swap your computer with another unit between dives,

or share your computer with another diver underwater. It is impossible for two

divers to stay precisely together underwater, and your computer's dive profile

tracking of previous dives will be pertinent to you only. Nitrogen loading

of a second user may be significantly different and thus swapping dive computers

could lead to inaccurate and potentially dangerous predictions of decompression

status. This rule applies to the use of all dive computers, but is especially

important when using the DataPlus, due to the personal information it provides.

Responsible

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Surface PDPS No Deco Dive

Detail 'A' - Operating Mode Icons Deco Dive

LCD Display Legend

1c 2c

3a 3c

1a. TLBG - (Green - No Decompression zone)

1b. TLBG - (Yellow - Caution zone)

1c. TLBG - (Red - Decompression zone)

2a. O2 Bar Graph - (Green - safe O2 zone)

2b. O2 Bar Graph - (Yellow - Caution zone)

2c. O2 Bar Graph - (Red - Danger zone)

3a. VARI - (Green - rate/speed normal/safe)

3b. VARI - (Yellow - rate/speed excessive)

3c. VARI - (Red - rate/speed 'Too Fast')

4. Icon - Operating Mode - (See Detail A)

5. Icon - Maximum Depth

6. Icon - Low Battery

7. Icon - Log Mode

8. Icon - Temperature

9. Icon - Deco Stop Ceiling

10. Icon - Elapsed Dive Time

11. Control Button

12. Infrared Interface Ports (PC download)

DETAILED

OPERATIONS

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INFORMATIONAL DISPLAYS

Each DataPlus numeric or graphic display represents a unique piece of informa-

tion. It is imperative that you understand the formats, ranges, and values of the

information represented by the DataPlus' displays to avoid any possible misun-

derstanding that could result in error. This section describes each display in

detail.

NOTE: Displays associated with oxygen and the O2 bar graph

will only appear if FO2 has been set at a value other than 'Air'.

Depth Display

During a dive, the Current Depth display, located in the upper portion of the

LCD (Fig. 20a), indicates depths from 0 to 330 feet (99.5 meters) in 1 foot (.5

meter) increments. In the event that you descend deeper than 330 feet (99.5

meters), this display will show three dashes (Fig. 21a) to indicate, until you

ascend to 330 feet (99.5 meters) or shallower, that you have gone 'out of range'.

When the control button is depressed during a dive, current Temperature will be

displayed in place of current Depth for 2 seconds. Other displays that utilize

these segments of the LCD include - dive number, 'FO2', time to fly hours

(during the first 12 hours), and 'FLY' (during the second 12 hours).

A second depth display located in the center left portion of the LCD (Fig. 20b)

Fig. 21 - Depth Displays

(out of range - 3 dashes)

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Fig. 20 - Depth Displays

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indicates the Maximum Depth reached during that dive. In the event that you

descend deeper than 330 feet (99.5 meters), this display will only show three

dashes (Fig. 21b, page 18) for the remainder of that dive, and as the Max Depth

in the Dive Log for that dive. Other displays that utilize these segments of the

LCD include - level of PO2 (if greater than 1.40 BAR), and required decompres-

sion ceiling stop depth.

During a Decompression Dive the required Ceiling Stop Depth (Fig. 24a, page

20) replaces the Maximum Depth display. However, Maximum Depth will

appear for 3 seconds when the screen toggles to the Alternate display once every

15 seconds while in the Decompression Mode.

During a nitrox dive, if the value of PO2 reaches 1.40 BAR, the PO2 value will

remain on display (Fig. 22a) until the level decreases below 1.40 BAR. Max

Depth and Bottom Time (or Stop Depth and Stop Time) will not be displayed

until the PO2 value decreases below 1.40 BAR.

TIME DISPLAY

The Main Time display, located in the lower portion of the LCD (Fig. 23a),

indicates elapsed Surface Time, theoretical Dive Time Available during the

PDPS, No Decompression (or O2 tolerance) Dive Time Remaining, Total Ascent

Time required, or time to fly (during the second 12 hours) depending on the

mode that the DataPlus is in at the time. Other displays that utilize these

Fig. 22 - High PO2

Fig. 23 - Time Displays

segments of the LCD include - FO2 set point value, 'EA' (External Access), and

'FLY' (during the first 12 hours).

A second time display, located in the center right portion of the LCD (Fig. 23b,

page 19), indicates Elapsed Dive Time, or Decompression Stop Time required

(Fig.24b) for the current stop ceiling indicated, as identified by the Elapsed Dive

Time and Ceiling Stop icons, respectively. Other displays that utilize these

segments of the LCD include - 'FO2', 'PO2', 'O2', and time to fly minutes (during

the first 12 hours).

Note that the maximum value of Elapsed Dive Time that will be displayed is

1:59 (hr:min). When Elapsed Dive Time exceeds 1 hour and 59 minutes, the

display will show 1: - - for the remainder of that dive and in the log for that dive.

Time displays are shown in hour:minute format (i.e. 1:06 represents one hour

and six minutes, not 106 minutes!). The colon that separates hours and minutes

blinks once per second when the display is indicating real time such as elapsed

Surface Time or Dive (bottom) Time. Dive Time Available, No Decompression

Dive Time Remaining, Total Ascent Time required, or Time to Fly are calculated

projections of time and use a solid (non-blinking) colon to indicate that they are

counting down, rather than counting up.

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Fig. 24 - Decompression Stop

Depth / Time

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GRAPHIC DIVER INTERFACE™

NOTE: Displays associated with oxygen and the O2 bar graph

will only appear if FO2 has been set at a value other than 'Air'.

Three bar graphs referred to as the Graphic Diver Interface™ are located around

the perimeter of the DataPlus' LCD (Fig. 25). They are color coded green,

yellow, and red to denote normal, caution and danger zones, respectively. The

Graphic Diver Interface allows you to make quick status checks underwater of

your no decompression status, oxygen loading status, and ascent rate. Keeping

these bar graphs in the green at all times will reduce your exposure to decom-

pression sickness, oxygen toxicity, and the effects of an excessive ascent rate.

TISSUE LOADING BAR GRAPH® (TLBG)

The Tissue Loading Bar Graph® (TLBG) represents nitrogen loading, showing

your relative no decompression or decompression status. As your depth and

bottom time increase, segments will add to the graph in an arc beginning from

the lower left. As you ascend to shallower depths, the TLBG will begin to recede,

indicating that additional no decompression time is allowed for multilevel diving.

The TLBG also assists you with managing decompression by filling a large red

'ceiling stop required' segment, which is explained in more detail in the Handling

the Extremes section. Fig. 25 - Bar Graphs

(Graphic Diver Interface™)

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The TLBG, located around the left perimeter of the LCD (Fig. 26), monitors 12

different nitrogen compartments simultaneously and displays the one that is in

control of your dive. It is divided into a green No Decompression zone (NO

DECO), a yellow Caution zone (C.Z.), and a red Decompression zone (DECO).

The large red DECO zone alerts you to focus your attention on current required

Decompression stop 'ceiling' depth and time shown as digital displays across the

center of the LCD. Stop depths will be 10FT (3M), 20FT (6M), 30FT (9M), 40FT

(12M), 50FT (15M), or 60FT (18M), as calculated for your current decompres-

sion situation.

Prior to a repetitive nitrox dive, if all segments of the TLBG are displayed during

the Pre Dive Planning Sequence™ (PDPS), and no segments of the O2 bar graph

are displayed, that next dive is calculated to be controlled by nitrogen loading.

WARNING: Oceanic advocates responsible diving practices

consistent with your individual level of formal training and

experience, and does not recommend decompression diving or

diving below 130 feet (39 m).

OXYGEN ACCUMULATION (O2) BAR GRAPH

The Oxygen Accumulation (O2) Bar Graph (Fig. 27) represents oxygen loading,

showing the maximum of either per dive allowable O2, or 24 hour period allow-

able O2. As oxygen loading (oxygen tolerance dose or OTU) increases during the

Fig. 27 - O2 Bar Graph

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Fig. 26 - TLBG

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VARIABLE ASCENT RATE INDICATOR™ (VARI)

The Variable Ascent Rate Indicator™ (VARI), located along the bottom of the

LCD screen (Fig. 29), is provided to help you to avoid excessive ascent rates by

providing a visual representation of ascent speed, rather than just showing that

you are ascending too fast.

The LCD displays 5 triangular segments above a green, yellow, and red reference

zones. The segments appear beginning from the left side and may be considered

an ascent rate speedometer. Green is a 'normal' rate, yellow is a 'caution' rate,

and red is 'Too Fast'. When your ascent rate exceeds the maximum recom-

mended rate of 60 feet (18 meters) per minute, the VARI segments will enter the

red zone and flash once per second until your ascent speed is slowed. The actual

speeds that the VARI segments represent are shown above Fig. 29.

Ensure that you are familiar with all displays and bar graphs prior to

using your DataPlus.

Fig. 29 - VARI (Variable

Ascent Rate Indicator™)

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Segments = Speed (rate)

0 = 0 - 20 fpm (0 - 6 mpm)

1 = 21 - 30 fpm (6.5 - 9 mpm)

2 = 31 - 40 fpm (9.5 - 12 mpm)

3 = 41 - 50 fpm (12.5 - 15 mpm)

4 = 51 - 60 fpm (15.5 - 18 mpm)

5 = 61+ fpm (18.5+ mpm)

(when 5, all will flash)

Responsible

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OPERATIONAL MODES

NOTE: Displays associated with oxygen and the O2 bar graph

will only appear if FO2 has been set at a value other than 'Air'.

The different operating modes of the DataPlus are easy to tell apart. Each is

clearly identified with unique graphic mode icons (Fig. 30) that provide quick

visual reference during the various modes of operation. Become familiar with all

modes and icons so that you understand exactly what information the DataPlus

is providing you at any specific time.

Above water modes include - Diagnostic Mode, Pre Dive Planning Sequence™

(PDPS), Surface Mode, Dive Log Mode, Time to Fly Mode, and External Access

(EA) Mode. Diagnostic, Dive Log, and EA Modes are accessed by pressing the

control button.

Underwater modes include the No Decompression Dive Mode, Temperature

Mode, Decompression Dive Mode and Alternate Decompression Dive Mode, High

PO2 Dive Mode, Violation Mode, and Gauge Mode. You will not see Decompres-

sion Dive, High PO2 Dive, Violation, or Gauge Modes unless you dive to ex-

tremes. Temperature Mode can be accessed and the Oceanglo® backlight

illuminated by pressing the control button. Fig. 30 - Mode Icons

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Icon

a - Maximum Depth

b - Low Battery warning

c - Dive Log mode

d - Temperature

e - Ceiling (Deco Stop)

f - Elapsed Dive Time

g - Operating (Dive) mode

ACTIVATION AND DIAGNOSTIC MODE

WARNING: Never activate the DataPlus underwater. This may

result in inaccurate depth and no decompression time displays.

Activation is not possible deeper than 4 feet (1.5 meters) under-

water, or at elevations higher than 14,000 feet (4,267 meters).

For Activation, refer to the explanation given on page 4.

Diagnostic Mode is displayed immediately following activation. After pressing

and releasing the control button, the Diagnostic Mode will display all "8's”

followed by dashes, and then a countdown from 9 to 0 (Fig. 31). During the

countdown, the DataPlus checks its display functions and battery voltage to

ensure everything is working properly, then changes to the Surface Mode.

If battery voltage is below the level sufficient for a day's operation, the Battery

icon will be displayed, flashing. Below 15% of rated voltage, all graphic displays

will shut off except the Battery icon that will flash 16 final times prior to shut-

down of the DataPlus. See page 69 for more information regarding Low Battery.

WARNING: If a Low Battery condition is indicated immediately

upon activation, Oceanic strongly recommends that you DO NOT

dive until batteries are replaced.

Fig. 31 - Diagnostic Mode

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If a dive is not made within 2 hours after activation, the DataPlus will shut off

automatically to save battery power. Always check your DataPlus before

entering the water to ensure that it has been activated.

SURFACE MODE

Surface Mode (Fig. 32), identified by the Surface Mode icon to the right of the

Surface Time display, immediately follows Diagnostic Mode after initial activa-

tion. Information provided includes, the number of the most recent dive made

('0' if no dive has been made since activation), elapsed Surface Time with the

colon flashing, tissue nitrogen loading (if any) as the TLBG, and oxygen loading

as the O2 bar graph (if the previous dive was a nitrox dive).

At the end of a dive, when you ascend to 3 feet (1 meter) or shallower, the

DataPlus will automatically enter Surface Mode (Fig 33) and begin counting

your Surface Interval (SI). This first 10 minutes is in affect, a transition period:

• The main Time display will start to count Surface Interval with the colon

flashing.

• The Dive Mode icon will be replaced by the Surface Mode icon that will flash

indicating post dive Surface Mode transition.

• The previous Dive Number will appear near the top of the LCD display.

• The TLBG will indicate current nitrogen loading.

• The O2 bar graph will indicate current oxygen loading (if the previous dive

Fig. 32 - Surface Mode

(after activation)

Fig. 33 - Surface Mode

(after dive <10 min SI)

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was a nitrox dive).

If you descend during that first 10 minute transition period, time underwater

will be considered a continuation of that dive. The time at the surface (if less

than 10 minutes) will not be added as elapsed dive time. During the 10 minute

transition period, the Log Mode is accessible and will display that dive's data,

however, data will not be stored in the unit's memory until the 10 minute period

is completed. The PDPS will not appear until after the first 10 minutes.

Once 10 minutes have elapsed, the Surface Mode icon stops flashing (Fig. 34),

and the dive number will advance to show the number of the next dive. The

Surface Sequence will advance screens from Surface Mode., to Time to Fly, to

FO2, to PO2, to PDPS, and repeat once per minute until the next dive is made,

or until the unit enters Fly Mode after 12 hours. Also, that dive is entered into

the memory of the Dive Log, and a subsequent descent will be considered a new

dive. If the TLBG is displayed during the PDPS, limits are being controlled by

nitrogen. If the O2 bar graph is displayed, limits are being controlled by oxygen.

Remember!! FO2 must be set prior to descending on each nitrox dive.

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Fig. 34 - Surface Mode

(after dive >10 min SI)

DataPlus

PRE DIVE PLANNING SEQUENCE™ (PDPS)

Prior to every dive, Oceanic strongly recommends that you view the

PDPS to review the no decompression limits that will help you plan

your dive as required to avoid decompression or oxygen toxicity. This

is especially important for repetitive dives, when the PDPS (Fig. 35) will indicate

for you the adjusted no decompression bottom times that are available to you on

your next dive, based on any residual nitrogen or oxygen accumulation (which-

ever is in control) following your last dive and surface interval.

WARNING: The PDPS predicts only no decompression times for

subsequent dives. Depending on cylinder size, breathing gas

consumption, and oxygen accumulation, you may have less time

available than shown in the PDPS because of breathing gas

quantity or other limitations.

As you will recall from page 5, after activation and diagnostics, the unit will

enter the Surface Mode for several seconds, then display FO2, then the maxi-

mum depth that can be achieved with a PO2 of 1.60 BAR, then automatically

commence the PDPS, identified by the PDPS icon (Fig. 35a). At that time and

once each minute afterward, the PDPS will sequentially show depths from 30

feet (9 m) to 160 feet (48 m) in 10 foot (3 m) increments, which takes about 42

seconds. Fig. 35 - PDPS

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NO DECOMPRESSION DIVE MODE

Upon descending deeper than 5 feet (1.5 meters), the DataPlus will enter the No

Decompression Dive Mode (Fig. 37), identified by the No Decompression Dive

icon (Fig. 37b) located to the right of the Main Time display.

Information provided includes Current Depth, Maximum Depth for that dive

(and Max Depth icon), Elapsed Dive Time (and Elapsed Dive Time icon), and No

Decompression Dive Time Remaining for that depth. The Graphic Diver Inter-

face is also active, displaying nitrogen loading (TLBG), ascent rate (VARI), and

oxygen loading (O2 bar graph) if FO2 was set to a value other than 'Air'.

No Decompression Dive Time Remaining is the maximum amount of

time you can stay at your current depth before entering a decompression

situation. The No Decompression Time is calculated based on the amount

of nitrogen absorbed by 12 hypothetical tissue compartments. The rates

each of these compartments absorb and release nitrogen is mathemati-

cally modeled and compared against a maximum allowable nitrogen level.

Whichever one of the 12 is closest to this maximum level is the controlling

compartment for that depth. Its resulting value is displayed numerically

(Fig. 37a) along with the No Decompression Dive icon (Fig.37b), and

graphically as the TLBG (Fig. 37c).

As you ascend from depth following a dive that has approached the no Fig. 37 - No Decompression

Dive Mode

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decompression limit, the TLBG will diminish as control shifts to slower

compartments. This is a feature of the decompression model that is the

basis for multilevel diving, one of the most important advantages the

DataPlus offers. (See page 80 in the Reference section for more informa-

tion pertaining to tissue tracking.)

The no decompression algorithm is based upon Haldane’s theory using

maximum allowable nitrogen levels developed by Merrill Spencer. Repeti-

tive diving control is based upon experiments designed and conducted by

Dr. Ray Rogers and Dr. Michael Powell in 1987. Diving Science and

Technology® (DSAT), a corporate affiliate of PADI®, commissioned these

experiments and now uses the findings in the Recreational Dive Planner™

distributed by PADI.

As your depth and bottom time increase, the TLBG will fill with segments in a

clockwise direction from the lower left toward the upper left to represent the

absorption of nitrogen. If the TLBG passes the yellow caution (C.Z.) zone (Fig.

38a), you will have exceeded the No Decompression Limit and the DataPlus will

enter Decompression Mode. Upon ascent to shallower depths, the bar graph will

begin to recede in a counter clockwise direction, indicating that additional no

decompression time is available through multilevel diving. In the event that

this occurs, you must serve your decompression obligation as required,

then further reduce the TLBG with a safety stop.

Fig. 38 - TLBG Caution Zone

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Produkt Specifikationer

Mærke:	Oceanic
Kategori:	Duikcomputer
Model:	Data Plus

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