Oceanic Data Mask User manual

Mask / Dive Computer
Operating Manual
TM

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DataMask FULL LCD
Components:
a. TLBG / O2BG
b. Icon - Log Mode
c. Icon - Low Battery
d. Icons - SI (S rface Interval)
- FT or M (Depth)
- MAX
e. Icons - EDT (Elapsed Dive Time)
- BAR or PSI (Press re)
f. Icon - Degrees (Temperat re)
g. Icons - TAT (Total Ascent Time)
- OTR (O2 Time Remaining)
- ATR (Air Time Remaining)
- NDC (No Deco Time Remaining)
h. Icon - Descend (arrow)
- Stop (bar)
- Ascend (arrow)
i. Icons - M or FT (Depth)
j. Icon - ATR (Air Time Remaining)
f
c
d
e
g
h
j
k
b
i
a
l

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CONTENTS
FULL LCD ......................................................................................................................................................................... 2
WARRANTY, NOTICES, DECOMPRESSION MODEL ....................................................................................................7
FCC ID ............................................................................................................................................................................... 8
INTRODUCTION AND GENERAL FEATURES AND DISPLAYS .................................................................................... 9
General Interface and H man Factors ................................................................................................................. 10
Mask Optics and Display Interface ....................................................................................................................... 11
Environmental Capabilities ................................................................................................................................... 11
INTERACTIVE CONTROL CONSOLE ..................................................................................................................... 12
OPERATING MODE STRUCTURE ........................................................................................................................... 13
AUDIBLE ALARM ...................................................................................................................................................... 14
BACKLIG T .............................................................................................................................................................. 16
POWER SUPPLY ...................................................................................................................................................... 17
BAR GRAP .............................................................................................................................................................. 18
PC INTERFACE ......................................................................................................................................................... 21
ALP A / NUMERIC DISPLAYS ................................................................................................................................ 22
Tank Press re Display .......................................................................................................................................... 22
Depth Displays ...................................................................................................................................................... 22
Air Time Remaining Display ................................................................................................................................. 23
Time, Date, and Temperat re Displays ................................................................................................................ 23
SURFACE SEQUENCE AND OPERATING MODES ..................................................................................................... 25
OPERATING MODES ................................................................................................................................................ 26
SURFACE MODE ...................................................................................................................................................... 26
NOR (Normal) S rface Main Display ................................................................................................................... 27
NOR S rface Main B tton Operations ................................................................................................................. 28
Transmitter Low Battery .................................................................................................................................... 29
SET MODES .............................................................................................................................................................. 29
SET G GROUP (BACKLIG T) ................................................................................................................................. 30
Set Backlight Level ............................................................................................................................................... 31

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CONTENTS (continued)
SET F GROUP (FO2) ................................................................................................................................................ 32
Set FO2 for NOR Nitrox Dives ............................................................................................................................. 32
Set FO2 ................................................................................................................................................................ 34
Set FO2 50% Defa lt ........................................................................................................................................... 35
SET A GROUP (NOR/GAU ALARMS) ...................................................................................................................... 35
Set A dible Alarm ................................................................................................................................................. 36
Set Depth Alarm ................................................................................................................................................... 37
Set EDT (Elapsed Dive Time) Alarm ................................................................................................................... 38
Set TLBG (Tiss e Loading Bar Graph) Alarm ...................................................................................................... 39
Set DTR (Dive Time Remaining) Alarm ................................................................................................................ 40
Set T rn Press re Alarm ...................................................................................................................................... 41
Set End Press re Alarm ....................................................................................................................................... 42
Set PO2 Alarm ...................................................................................................................................................... 43
SET U GROUP (UTILITIES) ...................................................................................................................................... 43
Set Wet Activation ................................................................................................................................................ 44
Set Units ............................................................................................................................................................... 45
Set NOR Safety Stop ............................................................................................................................................ 46
Set Conservative Factor ....................................................................................................................................... 47
Set Sampling Rate ................................................................................................................................................ 48
Set Transmitter Link Code .................................................................................................................................... 49
SET T GROUP (TIME/DATE) .................................................................................................................................... 51
Set Ho r Format ................................................................................................................................................... 51
Set Time ................................................................................................................................................................ 52
Set Date ................................................................................................................................................................ 53
SERIAL NUMBER (DATAMASK) .............................................................................................................................. 54
NOR SURF ALT DISPLAYS 1 AND 2 ....................................................................................................................... 55
NOR PLAN MODE ..................................................................................................................................................... 56
FLY MODE ................................................................................................................................................................. 59
SAT MODE (DESATURATE) ..................................................................................................................................... 60
NOR/GAU LOG MODE ............................................................................................................................................. 62
NOR/GAU ISTORY MODE ...................................................................................................................................... 66

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CONTENTS (continued)
OVERVIEW OF DIVE MODE INFORMATION ............................................................................................................... 69
POSITIONING A TRANSMITTER AND MASK ......................................................................................................... 70
Link Interr ption Underwater ................................................................................................................................ 70
DIVE TIME REMAINING (DTR) ................................................................................................................................. 71
No Decompression Dive Time Remaining (NDC) ................................................................................................ 72
Oxygen Acc m lation Time Remaining (OTR) .................................................................................................... 73
Air Time Remaining (ATR) .................................................................................................................................... 74
Air Time Remaining Alarm .................................................................................................................................... 75
ASCENT RATE ALARM ............................................................................................................................................ 76
TURN AND END PRESSURE ALARMS ................................................................................................................... 76
CONTROL OF DISPLAYS ......................................................................................................................................... 76
WET CONTACTS ....................................................................................................................................................... 77
NOR (NORMAL) TYPE DIVE MODES ........................................................................................................................... 79
NOR DIVE MAIN AND ALT DISPLAYS ..................................................................................................................... 80
SETTING BACKLIG T LEVEL ................................................................................................................................. 82
NOR DIVE NO DECO SAFETY STOP ...................................................................................................................... 83
DECOMPRESSION DIVE MODE .............................................................................................................................. 85
VIOLATION MODES .................................................................................................................................................. 88
IG PO2 .................................................................................................................................................................. 93
IG O2 .................................................................................................................................................................... 94
NOR POST DIVE MODES .............................................................................................................................................. 97
TRANSITION PERIOD .............................................................................................................................................. 98
AFTER T E TRANSITION PERIOD ....................................................................................................................... 100
GAUGE OPERATING MODE ....................................................................................................................................... 101
GAU SURFACE MAIN AND ALT DISPLAYS .......................................................................................................... 102
GAU DIVE MAIN AND ALT DISPLAYS ................................................................................................................... 104

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CONTENTS (continued)
FREE DIVE OPERATING MODE ................................................................................................................................. 107
FREE SURFACE MAIN AND ALT DISPLAYS ........................................................................................................ 109
FREE SURFACE SET MENU .................................................................................................................................. 111
FREE S rface CDT (Co nt Down Timer) Stat s ............................................................................................... 111
Set FREE CDT ................................................................................................................................................... 112
FREE Dive EDT (Elapsed Dive Time) Alarm ..................................................................................................... 113
Set FREE EDT Alarm ......................................................................................................................................... 113
FREE Dive Depth Alarms ................................................................................................................................... 114
Set FREE Dive Depth Alarms ............................................................................................................................. 114
FREE DIVE MAIN, CDT, AND ALT DISPLAYS ....................................................................................................... 117
FREE DIVE ALARMS .............................................................................................................................................. 119
ENTRY INTO DECO DURING A FREE DIVE ......................................................................................................... 121
OCEANIC WORLDWIDE (INTERNATIONAL DISTRIBUTORS) ............................................................................ 122
REFERENCE ................................................................................................................................................................. 123
UPLOADING SETTINGS AND DOWNLOADING DATA ........................................................................................ 124
PC Compatibility Req irements .......................................................................................................................... 125
MASK PREPARATION AND USE ........................................................................................................................... 126
CARE AND CLEANING ........................................................................................................................................... 127
INSPECTIONS AND SERVICE ............................................................................................................................... 127
BATTERY REPLACEMENT .................................................................................................................................... 130
INSTALLING A TRANSMITTER ON A REGULATOR ............................................................................................ 135
TRANSMITTER COMPATIBILITY WIT NITROX .................................................................................................. 135
ALTITUDE SENSING AND ADJUSTMENT ............................................................................................................ 136
C ARTS OF NO DECOMPRESSION LIMITS AT ALTITUDE ................................................................................ 137
C ART OF OXYGEN EXPOSURE LIMITS ............................................................................................................ 138
SPECIFICATIONS ................................................................................................................................................... 139
ABBREVIATIONS .................................................................................................................................................... 146
INSPECTION/ SERVICE RECORD ......................................................................................................................... 147
Pay special attention to items marked
with this Warning symbol.

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LIMITED TWO-YEAR WARRANTY
For details and online registration, visit www.OceanicWorldwide.com
COPYRIGHT NOTICE
This Operating 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 Oceanic / 2002 Design.
DataMask Operating Manual, Doc. No. 12-2736
© 2002 Design, 2007
San Leandro, CA USA 94577
TRADEMARK, TRADE NAME, AND SERVICE MARK NOTICE
Oceanic, the Oceanic logotype, DataMask, the DataMask logo, Air Time Remaining (ATR), Diver Replaceable Batteries,
Graphic Diver Interface, Tissue Loading Bar Graph (TLBG), Pre Dive Planning Sequence (PDPS), Set Point, Control
Console, Turn Gas Alarm, OceanLog, and Digital Optic System are all registered and unregistered trademarks, trade
names, and service marks of Oceanic. All rights are reserved.
PATENT NOTICE
U.S. Patents have been issued, or applied for, to protect the following design features:
Air Time Remaining (U.S. Patent no. 4,586,136 and 6,543,444) and Data Sensing and Processing Device (U.S. Patent
no. 4,882,678). Set TLBG Alarm and other patents pending. User Setable Display (U.S. Patent no. 5,845,235) is
owned by Suunto Oy (Finland).
DECOMPRESSION MODEL
The programs within the DataMask 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 DataMask dive computer
model is based upon the latest research and experiments in decompression theory. Still, using the DataMask, just
as using the U.S. Navy (or other) No Decompression Tables, is no guarantee of avoiding decom-
pression 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.

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WARNING: If your DataMask stops working for any reason, it is
important that you have anticipated this possibility and are pre-
pared for it. This is an important reason for not pushing the no
decompression and oxygen exposure limits, and a critical reason
to avoid entering decompression. If you dive in situations where
your trip would be ruined or your safety would be jeopardized by
losing the use of your DataMask, a backup instrument system is
highly recommended.
FCC ID: MH8A
FCC COMPLIANCE:
This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1.) this equipment may not
cause harmful interference, and 2.) this equipment must accept any interference received, including interference that may cause undesired
operation.
FCC INTERFERENCE STATEMENT:
This equipment has been tested and found to comply with the limits for an Intentional Radiator, a Class B Digital Device, pursuant to Part
15 of FCC Rules, Title 47 of the Code of Federal Regulations. These rules are designed to provide reasonable protection against harmful
interference in a commercial or residential installation. This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
There is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and receiver.
 Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
 Consult the dealer or an experienced radio/TV technician.
Warning: Changes or modifications to this unit not expressly approved by Oceanic/2002 Design could
void the user's authority to operate the equipment.

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WARNING: Prior to diving with the DataMask, you must also
read and understand the Oceanic Dive Computer Safety and
Reference Manual, Doc. No. 12-2262, which provides Important
Warnings and Safety Recommendations as well as general
product information.
INTRODUCTION
AND
GENERAL FEATURES AND DISPLAYS

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INTRODUCTION
Welcome to OCEANIC and thank you for choosing the DataMask !
It is extremely important that you read this Operating Manual in sequence and understand
it completely before attempting to use the DataMask as a dive computer.
It is equally important that you read the Oceanic Dive Computer Safety and Reference
Manual (Doc. No. 12-2262) provided with your DataMask. It contains information that
you must become familiar with prior to diving with your DataMask.
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.
General Interface and Human Factors
The Mask provides a watertight face seal and comfort level during SCUBA or FREE dives.
The Mask and its components will not interfere with or degrade the user's capability to use
underwater communication or acoustic system headsets that mount over the user's ear(s).
Straps and Strap Adjustments allow for quick and easy donning and doffing of the Mask
as would be done with a typical sport diving Mask.
Mask electronics are activated by manual button operation or by water activation (if set
ON, a predefined user setting).

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A diver who can read his or her instruments with uncorrected vision will be able to read
the Mask display in all the environmental conditions described.
DataMask System components can be located and operated by a diver wearing a 7 mm
thick three finger (lobster claw) wet suit glove. The equipment will not be impaired/
degraded when the diver is wearing a 7 millimeter wet suit or dry suit hood.
Mask Optics and Display Interface
The Display of the Mask is viewed through an integrated Digital Optic System that is
used to display alpha/numeric data and icons/symbols.
After magnification, alpha/numeric characters on the Display can be read by a user who
can read a ½ inch character at a distance of 10" from the eye with uncorrected vision.
NOTE: Characters and symbols (icons) appear as a negative field
which is lighted against a dark background when active and invisible
(dark against a dark background) when not active.
Environmental Capabilities
Functionality is not degraded by exposure to the life cycle environmental profiles and
conditions described. The DataMask meets the manufacturer's environmental test stan-
dards and combined test procedures performed on dive computers and dive masks.
Tests have been conducted to verify performance in the environmental profiles and condi-
tions described.

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Ambient Light Levels
The Mask's display is readable on the surface and while underwater in Ambient Light
Levels ranging from no light to bright light (direct sun). Shading may be required on the
surface in direct sunlight.
Visibility
The Mask's display is readable in external Visibility Conditions ranging from zero to
infinite. It is readable as long as water does not cover the Display Optics. The Mask lens
and Digital Optic System are capable of being prevented from fogging. Water droplets
are prevented from collecting on the Display Optics in wet conditions.
INTERACTIVE CONTROL CONSOLE
The Interactive Control Console consists of 2 Control Buttons that allow you to select mode
options and access specific information. They are also used to link the Transmitter, enter
Settings, activate the Backlight, and acknowledge the Audible Alarm.
Throughout this manual they will be referred to as the A (Top) and S (Side) buttons.
 Top = Advance (A) button
 Side = Select (S) button

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OPERATING MODE STRUCTURE
The A (Top) button is used to access 3 Operating Modes (Fig. 1)
that include NOR (Normal Air/Nitrox Dive Computer), GAU
(Digital Gauge Mode), and FRE (Free Dive Mode).
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.
When Wet Activation is set ON, the DataMask will enter the
selected Dive Mode upon descent to 5 FT (feet) /1.5 M (meters),
regardless of what surface screen is displayed at the time.
WARNING: When Wet Activation is set OFF, the
DataMask must be activated by push button
prior to the first dive of a new series. Com-
mencing a dive will not activate Dive Mode
unless Wet Activation is set ON or the unit is
activated.
Entering Settings and Plan Mode are available in NOR SURF
Mode which also allows access to ALT (Alternate) Displays, Set,
Plan, Fly, Desat, Log, and History Modes. Tank Pressure is
displayed if a Transmitter is active and Linked with the
DataMask.
Fig. 1 - OPERATING MODES
NORMAL (AIR/NITROX)
FREE DIVE
GAUGE

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GAUGE Surface Mode allows access to ALT (Alternate) Displays, Set, Fly, Log, and History
Modes. It also displays Tank Pressure.
FRE Mode allows access to sub modes by first accessing NOR Surface Mode. It does not
display Tank Pressure.
Once a dive is made in GAUGE Mode, the DataMask is locked into that Mode for 24
hours after the dive.
AUDIBLE ALARM
Most warning situations that activate the Audible Alarm while operating in NOR or GAU
Mode cause the DataMask to emit 1 beep per second for 10 seconds, or until the situation
is corrected, or it is acknowledged by momentarily pressing and releasing the A (Top)
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.
FRE Dive Mode has its own set of Alarms which emit 3 short beeps either 1 or 3 times
which cannot be acknowledged.
If the Backlight is OFF, it will come ON at any time at the Level set during the time that an
Alarm strikes even when set OFF. It will remain ON until the Alarm condition is corrected
or clears, even if the S (Side) button is pressed in an attempt to turn it OFF.

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Situations that will activate the NOR/GAU 10 second Alarm include -
 Air Time Remaining (ATR) at 5 minutes, then again at 0 minutes.
 ATR becomes less than No Deco and O2 Time Remaining for 1 minute.
 Turn Pressure at the Set Point selected.
 End Pressure at the Set Point selected.
 Descent deeper than the Max Depth Set Point selected.
 Dive Time Remaining at the Set Point selected.
 Elapsed Dive Time at the Set Point selected.
 PO2 increases to the Set Point selected.
 High O2 of 300 OTU (single or daily exposure).
 Tissue Loading Bar Graph at the segment Set Point selected.
 NOR/GAU Ascent 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.
 Loss of the active Transmitter Link signal for more than 15 seconds during a dive.
 Entry into Decompression Mode (Deco).
 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/99.9 M is exceeded).
A single short beep (which cannot be disabled) is emitted for the following -
 Upon completion of a Hot Swap battery change.
 Change from Delayed to Full Violation 5 minutes after the dive.

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3 short beeps (which cannot be disabled) are emitted for the following -
 FREE Dive Elapsed Dive Time Alarm (3 beeps every 30 seconds if set ON).
 FREE Dive Depth Alarms 1/2/3 (set sequentially deeper) - each 3 beeps 3 times.
 FREE Dive TLBG Alarm (Caution zone, 4 segments) - 3 beeps 3 times.
 Entry into Deco during a FREE Dive (Permanent Violation) - 3 beeps 3 times.
 FREE Dive Mode Countdown Timer reaches 0:00 - 3 beeps 3 times.
During the following NOR Dive situations, the 10 second Audible Alarm will not turn off
when acknowledged -
 Ascending above a required Decompression Ceiling Stop Depth for more than 5
minutes (referred to as a Delayed Violation).
 Decompression requires a Ceiling Stop Depth of 70 FT/21 M or deeper.
 Being on the Surface for 5 minutes after a Conditional Violation.
BACKLIGHT
When the Backlight is OFF, depressing the S (Side) button will activate the Backlight which
will turn ON upon button depression. The Backlight will be ON, at the Level previously
set, until the S (Side) button is depressed again to turn it OFF.
 The Backlight will not be disabled if the S (Side) button is held depressed for any long
time (> 2 seconds) or if a Low Battery Alarm Condition (< 2.50 vdc) is sensed.
 If the Backlight is OFF, it will come ON at the Level previously set upon descent on a
dive, during the time that an Alarm strikes, and upon entry into a Set Menu while on
the surface or during a dive, even when set OFF. If the Backlight is ON, it will remain
ON and will not be turned OFF when the S (Side) button is pressed while operating
in the Set Menu.
 The Backlight does not operate when the DataMask is connected to a PC.

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POWER SUPPLY
The DataMask utilizes one 3 volt, type CR2 Lithium Battery. The
Battery should provide 160 hours of operation over the tempera-
ture ranges specified with the Backlight ON continuously while
set for maximum brightness (Level). The DataMask checks its
battery voltage every 2 minutes during surface operation.
 If the Mask's voltage decreases to the Warning level (2.75
volts), the Battery icon (shell with lid) will appear on
Surface displays (Fig. 2a) as an indication that the Battery
should be changed prior to commencing a series of dives.
 If the Mask's voltage decreases to the Alarm level (2.50
volts), the Battery icon (shell with lid) will flash and the
DataMask will shut Off.
 Low Battery Warning/Alarm conditions are not displayed
during Dive Modes.
 If a Mask 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.
The Transmitter also uses one 3 volt, type CR2 Lithium Battery
that should provide normal operation for 1 year or 300 dive
hours. A Transmitter checks battery voltage when it is pressur-
ized and will send a Low Battery signal to the Receiver in the
DataMask when the voltage drops below the Warning level.
Fig. 2 - LOW BATTERY
a

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 Transmitter Low Battery Warning/Alarm conditions are only
displayed as a Transmitter Low Battery Status screen (Fig.
3) that comes On and alternates with the SURF MAIN
screens when voltage decreases to the Warning level (2.75
volts).
 Each screen will be On for 3 seconds.
 Displayed on the Transmitter Status screen will be the
graphics trtr (meaning Transmitter), Lo (meaning Low
Voltage), and bAt (meaning Battery).
 The Battery should be changed prior to commencing a
series of dives.
 If the Transmitter's voltage decreases to the Alarm level
(2.50 volts), the Lo and bAt graphics will flash. Transmitter
operation will continue until Tank Pressure decreases to 50
PSI (4 BAR).
BAR GRAPH
The DataMask features one shared Bar Graph that represents
either nitrogen loading (Fig. 4A), or when accessed or during a
High O2 condition, oxygen accumulation (Fig. 4B).
By default the Bar Graph represents your relative no decompres-
sion or decompression status and is referred to as the Tissue
Loading Bar Graph (TLBG) identified by the TL icon and left side
bar.
Fig. 3 - TRANSMITTER LOW
BATTERY
Fig. 4B - O2BG
Fig. 4A - TLBG

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As your Depth and Elapsed Dive Time increase, segments will
add to the TLBG (Fig. 5A), and as you ascend to shallower
depths, the segments of the TLBG will begin to recede, indicating
that additional no decompression time is allowed.
The TLBG monitors 12 different nitrogen compartments simulta-
neously and displays the one that is in control of your dive. It
consists of 5 segments, the lower 4 represent No Decompression
status and the one at the top indicates a Decompression condi-
tion.
Within the available NOR Mode parameters that can be set
(described later) are a TLBG Alarm and a Conservative Factor
which, if set ON, reduces No Decompression times allowed.
FREE Dive Mode has a separate (fixed) TLBG Alarm.
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.
When the DataMask is set to operate in NOR Nitrox mode, the
Bar Graph will represent O2 accumulation when the O2 data
screen (Alternate Display) is accessed or a High O2 condition
exists. The O2 icon and right side bar will appear (Fig. 6a).
Fig. 6 -NOR DIVE ALT 2
a
a
Fig. 5 - NOR DIVE MAIN

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Regardless of which parameter the Bar Graph is representing at the time, nitrogen calcula-
tions (if in NOR Nitrox or FRE Mode) and oxygen calculations (if in NOR Nitrox Mode)
will continue to be performed in the background.
While in NOR Mode, displays associated with oxygen and the O2 Bar Graph will be
displayed if FO2 has been set at a value other than AIR (e.g., a numerical value) and the
ALT 2 screen that displays oxygen related data is accessed.
When the oxygen data ALT screen is accessed during a NOR Nitrox dive, the Bar Graph
will show the maximum of either per dive or 24 hour period accumulated oxygen.
As oxygen accumulation (or saturation) increases during a NOR Nitrox dive, segments will
add to the O2 Bar Graph, and as saturation decreases, it will begin to recede, indicating
that additional exposure is allowed for that dive and 24 hour period.
The DataMask will store calculated oxygen accumulation for up to 10 dives conducted
during a 24 hour period. If the maximum limit for NOR Nitrox dive oxygen accumulation
has been exceeded for that day (24 hour period), all of the segments of the O2 Bar Graph
will be displayed flashing (Fig. 7).
Depth/Time values will not appear in Plan Mode until the O2
Bar Graph recedes into the normal zone (lower 4 segments)
indicating that your daily oxygen saturation has decreased an
amount equivalent to the amount accumulated during the latest
dive completed.
Fig. 7 - HIGH O2