Oceanic VT Pro User manual

VT Pro
dive computer
operating manual
OCEANIC®

2
VT PRO
Components:
a. LED Warning Light
b. Advance (front) Button
c. Smartg o Sensing Port
d. Air Time Remaining Bar Graph
e. Se ect (side) Button
f. Icon - Operating Mode
g. Icon - Time
h. Variab e Ascent Rate Indicator
i. Graphic - Depth
j. Graphic - Demo Mode
k. Icon - Descend Arrow
Icon - Decompression Cei ing
Icon - Ascend Arrow
. Icon - Log Mode
m. Tissue Loading Bar Graph
n. Icon - A arm (Set Mode)
o. Icon - Temperature
p. Battery Indicator
q. O2 (oxygen) Bar Graph
r. Graphic - Transmitter Link
a
b
c
d
e
f
g
h
i
jk
l
m
q
r
p
n
o
r

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CONTENTS
LIMITED TWO-YEAR WARRANTY ............................................................................................................................. 7
NOTICES ..................................................................................................................................................................... 7
DECOMPRESSION MODEL ....................................................................................................................................... 7
FCC COMPLIANCE ..................................................................................................................................................... 8
FEATURES AND DISPLAYS ............................................................................................. 9
INTERACTIVE CONTROL CONSOLE ...................................................................................................................... 10
BAR GRAPHS ........................................................................................................................................................... 11
Tissue Loading Bar Graph (TLBG) ....................................................................................................................... 11
Oxygen Bar Graph (O2BG) ................................................................................................................................... 11
Variab e Ascent Rate Indicator (VARI) ................................................................................................................. 12
Air Time Remaining Bar Graph (ATRBG) ............................................................................................................. 12
DIVE TIME REMAINING ........................................................................................................................................... 13
ALPHA / NUMERIC DISPLAYS ................................................................................................................................ 13
Cy inder Pressure ................................................................................................................................................. 13
Depth Disp ays ..................................................................................................................................................... 14
Time and Date Disp ays ....................................................................................................................................... 14
Temperature Disp ay ............................................................................................................................................. 15
AUDIBLE ALARM ...................................................................................................................................................... 15
LED Warning Light ............................................................................................................................................... 15
SMARTGLO BAC LIGHT ......................................................................................................................................... 17
POWER SUPPLY ...................................................................................................................................................... 17
Low Battery Condition .......................................................................................................................................... 18
FO2 MODE ................................................................................................................................................................. 19
FO2 50% Defau t .................................................................................................................................................. 20

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CONTENTS (continued)
SETUP AND ACTI ATION ............................................................................................... 21
PRESSURE TRANSMITTER .................................................................................................................................... 22
ACTIVATION .............................................................................................................................................................. 22
Disp ay Modu e Identification ............................................................................................................................... 24
SURFACE MODE ...................................................................................................................................................... 25
Accessing Other Modes ....................................................................................................................................... 26
SET MODES .............................................................................................................................................................. 26
ENTERING SETTINGS -SET MODE #1 ............................................................................................................... 27
ENTERING SETTINGS -SET MODE #2 ............................................................................................................... 30
PLAN AND DI E MODES ................................................................................................ 45
TRANSMITTER SIGNAL RECEPTION GUIDE ........................................................................................................ 46
POSITIONING OF THE DISPLAY MODULE ............................................................................................................ 47
LIN INTERRUPTION UNDERWATER .................................................................................................................... 47
PRE DIVE PLANNING SEQUENCE ......................................................................................................................... 48
TISSUE LOADING BAR GRAPH .............................................................................................................................. 50
OXYGEN ACCUMULATION BAR GRAPH ............................................................................................................... 50
VARIABLE ASCENT RATE INDICATOR .................................................................................................................. 51
AIR TIME REMAINING BAR GRAPH ....................................................................................................................... 51
CONTROL OF DISPLAYS ......................................................................................................................................... 52
NO DECOMPRESSION DIVE MODE ....................................................................................................................... 53
No Decompression Dive Safety Stop ................................................................................................................... 54
DECOMPRESSION DIVE MODE ............................................................................................................................. 55
VIOLATION MODES .................................................................................................................................................. 57
Conditiona Vio ation Mode .................................................................................................................................. 57
De ayed Vio ation Modes ..................................................................................................................................... 58
Immediate Vio ation Mode and Gauge Mode ...................................................................................................... 60
HIGH PO2 DIVE MODE ............................................................................................................................................. 61
HIGH OXYGEN ACCUMULATION ............................................................................................................................ 62
USER SET DIGITAL GAUGE MODE ........................................................................................................................ 63

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CONTENTS (continued)
POST DI E MODES ........................................................................................................ 65
POST DIVE SURFACE MODE .................................................................................................................................. 66
TRANSITION PERIOD .............................................................................................................................................. 66
AFTER THE TRANSITION PERIOD (THE FIRST 2 HOURS) .................................................................................. 67
To access the Pre Dive P anning Sequence ........................................................................................................ 68
To access the Time to F y Countdown ................................................................................................................. 68
To access the Time to Desaturate Countdown .................................................................................................... 69
LOG MODE .......................................................................................................................................................... 69
AFTER THE FIRST 2 HOURS ................................................................................................................................... 72
WET CONTACTS ....................................................................................................................................................... 72
DOWNLOADING DATA TO A PC .............................................................................................................................. 73
RESET FEATURE ..................................................................................................................................................... 74
SIMULATOR (DEMO) MODE .......................................................................................... 75
GENERAL ........................................................................................................................ 83
CARE AND CLEANING ............................................................................................................................................. 84
INSPECTIONS AND SERVICE ................................................................................................................................. 84
BATTERY REPLACEMENT ...................................................................................................................................... 86
TRANSMITTER INSTALLATION ............................................................................................................................... 92
SPECIFICATIONS ..................................................................................................................................................... 93
OCEANIC WORLD WIDE .......................................................................................................................................... 99
SERVICE RECORD ................................................................................................................................................. 100

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WARNING: Prior to diving with the T Pro, you must also read and
understand the Oceanic Dive Computer Safety and Reference
Manual.
Pay special attention to items marked
with this Warning symbol.

7
LIMITED TWO-YEAR WARRANTY
For details, refer to the Product Warranty Registration Card provided.
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.
VT Pro Operating Manual, Doc. No. 12-2338
© 2002 Design 2002
San Leandro, Ca. USA 94577
TRADEMAR NOTICE
Oceanic, the Oceanic logo, VT Pro, the VT Pro logo, Smart Glo, OceanGlo, Graphic Diver Interface, Tissue Loading
Bar Graph, Pre Dive Planning Sequence, Variable Ascent Rate Indicator, Set Point, Control Console, Turn Gas Alarm,
and OceanLog 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:
Dive Time Remaining (U.S. Patent no. 4,586,136), Data Sensing and Processing Device (U.S. Patent no. 4,882,678),
Air Time Remaining (U.S. Patent no. 4,586,136), and Variable Ascent Rate Indicator (U.S. Patent no. 5,156,055). User
Setable Display (U.S. Patent no. 5,845,235) is owned by Suunto Oy (Finland).
DECOMPRESSION MODEL
The programs within the VT Pro 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 VT Pro dive computer model
is based upon the latest research and experiments in decompression theory. Still, using the VT Pro, 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.

8
FCC ID: MH8A
FCC Compliance:
This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following 2
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 con-
nected.
• Consult the dealer or an experienced radio/TV technician.
Warning: Changes or modifications to this unit not expressly ap-
proved by Oceanic/2002 Design could void the user's authority to
operate the equipment.

9
FEATURES and DISPLAYS
WARNING: Prior to diving with the T Pro, you
must also read and understand the Oceanic Dive
Computer Safety and Reference Manual which
provides Important Warnings and Safety Recom-
mendations as well as general product information.

10
INTRODUCTION
Welcome to Oceanic and thank you for choosing the VT Pro !
It is extremely important that you read this Operating Manual in sequence and understand it
completely before attempting to use the VT Pro.
It is equally important that you read the Oceanic Dive Computer Safety and Reference
Manual (Doc. No. 12-2262) provided with your VT Pro. It contains information that you
must become familiar with prior to diving with your VT Pro.
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.
INTERACTI E CONTROL CONSOLE
The Interactive Control Console consists of two Control Buttons
that allow you to select display options and access specific
information when you want to see it. They are also used to link
the Transmitter, enter Settings, activate the Backlight, and ac-
knowledge the Audible Alarm.
The Front button is referred to as Advance (Fig. 1a) and the
Side button as Select (Fig. 1b).
Fig. 1 - Interactive Contro
Conso e
b
a

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O
2
ATR
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20
40
50
60
0
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BAR GRAPHS
Tissue Loading Bar Graph (TLBG)
The Tissue Loading Bar Graph (Fig. 2a) represents tissue loading of nitrogen, showing your
relative no decompression or decompression status. As your depth and elapsed dive time
increase, segments will add to the Graph, and as you ascend to shallower depths, the Bar
Graph will begin to recede, indicating that additional no decompression time is allowed for
multilevel diving.
The Tissue Loading Bar Graph monitors 12 different nitrogen compartments simultaneously
and displays the one that is in control of your dive. It is divided into a green No Decom-
pression (normal) zone, a yellow Caution zone (also No Decompression), and a red De-
compression (danger) zone.
While you cannot provide a guarantee against the occurrence of decompression sickness,
you may choose your own personal zone of caution based upon age, physique, excessive
weight, etc., to reduce the statistical risk.
NOTE: Displays associated with oxygen and the O2
Bar Graph will only appear if FO2 has been set at a
value other than 'Air' (e.g., a numerical value).
Oxygen Accumulation Bar Graph (O2BG)
The O2 Bar Graph (Fig. 2b) represents oxygen loading, showing
the maximum of either per dive accumulated oxygen, or 24 hour
period accumulated oxygen. Fig. 2 - TLBG & O2BG
a
b

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O2
ATR
5
10
20
40
50
60
0
O
2
30
As your oxygen exposure (accumulation) increases during the
dive, segments will add to the Bar Graph, and as loading de-
creases, it will begin to recede, indicating that additional expo-
sure is allowed for that dive and 24 hour period.
ariable Ascent Rate Indicator ( ARI)
The Variable Ascent Rate Indicator (Fig. 3a) provides a visual
representation of ascent speed (i.e., an ascent speedometer).
Green is a 'normal' rate, yellow a 'caution' rate, and red is 'Too
Fast'. The segments of the VARI represent two sets of speeds
which change at a reference depth of 60 feet (18 meters). Refer
to the chart for segment values.
WARNING: At depths greater than 60 feet (18 meters),
ascent rates should not exceed 60 fpm (18 mpm). At
depths of 60 feet (18 meters) and shallower, ascent
rates should not exceed 30 fpm (9 mpm).
Air Time Remaining Bar Graph (ATRBG)
The Air Time Remaining Bar Graph (Fig. 3b) provides a graphic
representation of the time that you can remain at your present
depth and then, following a safe ascent, surface with a predeter-
mined reserve of Air. This calculation and display is based on
your Air Consumption Rate that is continuously monitored by the
VT Pro, and it takes into account the air required for a safe
ascent including any required decompression stops.
Fig. 3 - VARI & ATRBG
a
60 feet (18 m) & Shallower
Segments Ascent Rate =
Displayed FPM MPM
0 0-10 0 - 3
1 11-15 3.5-4.5
2 16-20 5-6
3 21-25 6.5- .5
4 26-30 8-9
5 >30 >9
Deeper than 60 feet (18 m)
Segments Ascent Rate =
Displayed FPM MPM
0 0-20 0 - 6
1 21-30 6.5-9
2 31-40 9.5-12
3 41-50 12.5-15
4 51-60 15.5-18
5 >60 >18
VARI Va ues
b

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FEET
ATR
5
10
20
0
PSI
O
2
The green, yellow, and red zones adjacent to the bar graph enable you to quickly focus on
remaining breathing gas times of 60 minutes and less, based on your pre selected End
Pressure Alarm Set Point (described later). The bar graph is more precise as time decreases
toward the red zone.
DI E TIME REMAINING
The VT Pro constantly monitors three critical pieces of information; no decompression status,
oxygen accumulation, and breathing gas consumption rate. Refer to the Oceanic Dive
Computer Safety and Reference Manual which describes Dive Time Remaining which is a
display that indicates the time that is more critical for you at that particular moment (i.e.;
whichever time is the least amount available of the three).
Displayed will be either Time Remaining before reaching the No Decompression limit (Fig.
5a), or Time Remaining before reaching the limit for Oxygen Accumulation, or Time Re-
maining before reaching the End Pressure Alarm set point.
ALPHA / NUMERIC DISPLAYS
Cylinder Pressure Display
Cylinder Pressure (Fig 5b) is displayed any time the Transmitter is
connected to a pressurized cylinder, and the Display Module is in
an active operating mode and properly linked.
Values of pressure are displayed numerically from 5 PSI (.5 BAR)
up to 5000 PSI (352 BAR) in increments of 5 PSI (.5 BAR).
Fig. 5 - Dive Time Remaining
a
b

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FEET
ATR
5
10
20
0
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M
A
X
Depth Displays
During a dive, the Current Depth display (Fig. 6a), indicates Depths from 0 to 399 feet
(120 meters) in 1 foot (.1 meter) increments.
By pressing the Front (Advance) button, the Maximum Depth reached during that dive
will be displayed (Fig. 6b).
During a Decompression Dive, the required Ceiling Stop Depth is displayed in the Max
Depth position. Maximum Depth can be viewed by pressing the Front (Advance) button.
Time and Date Displays
Time displays are shown in hour:minute format (i.e., 1:16 represents 1 hour and 16
minutes, not 116 minutes!). The colon that separates hours and minutes blinks once per
second when the display is indicating real time (e.g., Elapsed Dive Time), and is solid (non-
blinking) when times are calculated projections (e.g., Time to Fly).
The Main Time display has the largest digits of the display (Fig.
6c) A second time display (Fig. 6d) is located above it. Both
displays are identified by clock icons.
Date is displayed only to identify dive data while it is viewed in
the Log Mode. When Units of Measure are set for 'Imperial', the
Month appears to the left of Day. When set for Metric, the
Month appears to the right of Day.
Fig. 6 - Cy inder Pressure
and Depth Disp ays
b
a
c
a
d

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Temperature Display
Ambient Temperature is displayed in Surface Mode and Log Mode, and can be
viewed on an Alternate Display when the Front (Advance) button is pressed while in a dive
mode (Fig. 7a). If the Temperature exceeds a value of '99', 2 dashes ( - - ) will be dis-
played until temperature decreases to '99'.
NOTE: Each display represents unique pieces of information. It is imperative
that you understand the formats, ranges, and values of the information repre-
sented to avoid any possible misunderstanding that could result in error. The
Informational Displays are described in detail as the various operating modes
they appear in are presented throughout this manual.
AUDIBLE ALARM
When warning situations activate the Audible Alarm, the unit will
emit a continuous tone for 10 seconds, or until the situation is
corrected, or it is acknowledged by the user pressing the Front
(Advance) button for 2 seconds. If acknowledged by the user
and the situation corrected, the Alarm will sound again upon
reentry into the warning situation, or entry into another type of
warning situation.
A red LED Warning Light will flash when the Audible Alarm
sounds. They will turn off when the Alarm is acknowledged or
the situation is corrected. They will not be active if the Alarm is
Set OFF (a user setting).
Fig. 7 - Temperature Disp ay
FEET
ATR
5
10
20
0
PSI
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2
a

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Situations that will sound the Alarm, if it is turned ON (a user setting), include -
• Entry into Decompression Mode.
• Air Time Remaining Bar Graph Alarm (a user setting).
• Air Time Remaining = 5 minutes, then 0 minutes.
• Turn Pressure Alarm (a user setting).
• End Pressure Alarm (a user setting).
• PO2 => than the Max PO2 Alarm (a user setting), or => 1.60 ATA.
• Descent deeper than the Max Depth Alarm (a user setting).
• Tissue Loading Bar Graph Alarm (a user setting).
• Dive Time Remaining Alarm (a use setting).
• Elapsed Dive Time Alarm (a use setting).
• O2 Accumulation => allowable per dive limit, or limit for a 24 hour period.
• Ascending above a required Decompression ceiling stop depth for less than 5 minutes
(referred to as a Conditional Violation).
• Ascent Rate exceeds 60 feet/minute (18 meters per minute) if greater than 60 feet (18
meters), or 30 feet/minute (9 meters/minute) at 60 feet (18 meters) and shallower.
• Loss of Transmitter Link signal for > 1 minute during Dive Modes.
A single short beep (which cannot be disabled) is emitted for the following -
• After the Diagnostic countdown, if everything is okay.
• If the unit automatically returns to Surface Mode from Simulator Mode.
• Upon completion of a Hot Swap battery change with calculations saved.
• Change from Delayed to Full Violation 5 minutes after the dive.

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During the following situations, the 10 second continuous tone will be followed by a
5 second steady beep that 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 feet/21 meters or deeper.
• Being on the Surface for 5 minutes after a Conditional Violation (Permanent Violation).
SMARTGLO® BACKLIGHT
To activate the Backlight - press the Side (Select) button.
• The Smart Glo®feature senses the intensity of natural light present. If a low level of light
is present, the Backlight will activate and illuminate the display for button depression
time plus the user set Duration time of 0, 3, or 7 seconds.
• Press the button again to activate as desired.
NOTE: Extensive use of the Backlight reduces estimated Battery life. Also,
the Backlight does not operate during a Low Battery Condition or when down-
loading data to a PC.
POWER SUPPLY
The Transmitter utilizes 1 - 3 volt, CR2 Lithium Battery and the Display Module utilizes 1 - 3
volt CR2450 Lithium Battery. They should provide from 50 dive hours of operation, if you
conduct 1 - one hour dive each time the unit is activated, to over 150 dive hours of opera-
tion, if you conduct 3 or more one dives each time the unit is activated.

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Low Battery Condition
Voltage level is checked upon activation and every 10 minutes
during operation. When a Low Battery Condition occurs (either
the Display Module or Transmitter), the Battery icon appears on
the display flashing during Surface Mode (Fig. 8) and Fly/Desat
Mode (after 2 hours on the surface following a dive).
To determine whether the Low Battery Condition involves the
Transmitter or Display Module - press the Side (Select) button for
2 seconds while in Surface Mode.
• The Battery icon will be displayed for 3 seconds indicating
the condition of the Display Module's Battery (Fig. 9A).
• If the Transmitter is active and linked to the Display Module,
the Battery icon and the Transmitter icon will then be dis-
played for 3 seconds indicating the condition of the
Transmitter's Battery (Fig. 9B).
• The display will then revert to Surface Mode.
• If 75 % of the Rated Power has been consumed (Low Battery
Condition), the Battery icon will only display 1 bar inside the
shell and it will flash as a warning that the Battery is to be
replaced prior to conducting any further dives.
• Battery condition cannot be checked during Dive Modes.
• If the unit did not display a Low Battery Condition prior to
entering the Dive Mode, and a Low Battery Condition occurs
during the dive, there will be sufficient Battery power to
maintain unit operation for the remainder of that dive.
Fig. 9B - Battery Indicator
Transmitter
ATR
O
2
ATR
O2
Fig. 9A - Battery Indicator
Disp ay Modu e
Fig. 8 - Low Battery
(Surface Mode)
ATR
PSI
O
2

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Fig. 10 - FO2 set for Air
FO2 MODE
After Activation, the VT Pro will operate as an Air computer
without displaying information associated with oxygen calcula-
tions, unless it is set for a percentage of oxygen (FO2) other than
Air (a numerical value between 21 and 50 %).
When set with an FO2 value of 'Air' (Fig. 10), the VT Pro will
perform calculations the same as if FO2 were set for 21% oxy-
gen, internally accounting for oxygen loading for any subsequent
Nitrox dives. However, oxygen related displays, warnings, and
the O2 Bar Graph will not appear on the display for that dive, or
subsequent dives, unless FO2 is set for a numerical value (21 -
50).
Once a dive is made with the unit set as a Nitrox Computer (FO2
set for a numerical value), it cannot be programmed to operate
as an Air Computer until 24 hours after the last dive. 'Air' will
not be displayed as an option in the FO2 Mode. However, you
can set FO2 for 21% for use with Air.
When FO2 is set at a value of 21% (Fig. 11), the unit will
remain set at 21% for subsequent nitrox dives until FO2 is set to
a higher value, or until it automatically turns off and is reacti-
vated.
ATR
O
2
Fig. 11 - FO2 set at 21%
ATR
O
2

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FO2 50% Default
If the Default function is set to ON (Fig. 12) and FO2 is
set to a value 'greater than 21%', the FO2 set point value will
automatically revert to 50% 10 minutes after that dive. The
Maximum Depth that can be achieved with a PO2 of 1.60 ATA
will also be displayed.
• FO2 must therefore be reset for each repetitive nitrox dive,
or the value will automatically 'default' to 50(%) and the
dives will be calculated based on 50% O2 (50% nitrogen)
for oxygen calculations and 21% O2 (79% nitrogen) for
nitrogen calculations.
If the Default function is set to OFF (Fig. 13), the FO2
value for repetitive dives remains the same as previously set until
the set point is manually changed.
WARNING: When the unit shuts off, the FO2 set
point will default to AIR regardless if the 50% Default
is set ON or OFF. Always set, or verify, the FO2 set
point prior to each nitrox dive.
Setting FO2 for a nitrox dive is described on page 27.
Fig. 12 - FO2 Defau t ON
Fig. 13 - FO2 Defau t OFF
ATR
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ATR
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