Suunto VYTEC DS User Manual
EN
SUUNTO
VYTEC DS
INSTRUCTION MANUAL
QUICK REFERENCE GUIDE
DEFINITION OF WARNINGS, CAUTIONS AND NOTES
Throughout this manual, special references are made when deemed
important. Three classifi cations are used to separate these references
by their order of importance.
WARNING - is used in connection with a procedure or situation that
CAUTION - is used in connection with a procedure or situation that
NOTE - is used to emphasize important information.
may result in serious injury or death.
will result in damage to the product.
COPYRIGHT, TRADEMARK AND PATENT NOTICE
This instruction manual is copyrighted and all rights are reserved. It may
not, in whole or in part, be copied, photocopied, reproduced, translated,
or reduced to any media without prior written consent from SUUNTO.
SUUNTO, VYTEC, Consumed Bottom Time (CBT), Oxygen Limit Fraction
(OLF), SUUNTO Reduced Gradient Bubble Model (RGBM), Continuous
Decompression and their logos are all registered or un registered trademarks of SUUNTO. All rights are reserved.
CE
The CE mark is used to mark conformity with the European Union EMC
directive 89/336/EEC and Personal Protective Equipment directive
89/686/EEC. The SUUNTO dive instruments fulfi ll all the required EU
directives.
FIOH, Laajaniityntie 1, FIN-01620 Vantaa, Finland, notifi ed body no.0430,
has EC type-examined this type of personal protective equipment.
EN 250 Respiratory equipment - Open circuit self-contained compressed
air diving apparatus – Requirements, testing, marking.
The cylinder pressure gauge and the parts of this product used in measuring the cylinder pressure meet the requirements set in the section of
the European Standard EN 250 that concern cylinder pressure measurements. The instruments must be serviced by an authorized dealer
every second year or after 200 dives (whichever comes fi rst).
1
PrEN 13319
PrEN 13319 ”Diving accessories – Depth gauges and combined depth
and time measuring devices – Functional and safety requirements, test
methods” is a European diving depth gauge standard draft. The VYTEC
is designed to comply with this draft standard.
ISO 9001
SUUNTO Oy’s Quality Assurance System is certifi ed by Det Norske
Veritas to be according to the ISO 9001 in all SUUNTO Oy’s operations
(Quality Certifi cate No. 96-HEL-AQ-220).
SUUNTO Oy does not assume any responsibility for losses or claims by
third parties, which may arise through the use of this device.
Due to continuous product development, the VYTEC is subject to change
without notice.
WARNING!
READ THIS MANUAL! Carefully read this instruction manual in its
entirety paying close attention to all warnings listed below, including
section 1.1. ”Safety Precautions”. Make sure that you fully understand
the use, displays and limitations of the dive computer because any
confusion resulting from neglecting to follow this instruction manual or
from improper use of this device may cause a diver to commit errors
that may lead to serious injury or death.
WARNING!
NOT FOR PROFESSIONAL USE! Suunto dive computers are intended for recreational use only. The demands of commercial or professional diving may expose the diver to depths and exposures that tend
to increase the risk of decompression illness (DCI). Therefore, Suunto
strongly recommends that the device be not used for commercial or
professional diving activity.
WARNING!
ONLY DIVERS TRAINED IN THE PROPER USE OF SCUBA DIVING
EQUIPMENT SHOULD USE A DIVE COMPUTER! No dive computer
can replace the need for proper dive training. Insuffi cient or improper
training may cause diver to commit errors that may lead to serious
injury or death.
2
WARNING!
THERE IS ALWAYS A RISK OF DECOMPRESSION ILLNESS (DCI)
FOR ANY DIVE PROFILE EVEN IF YOU FOLLOW THE DIVE PLAN
PRESCRIBED BY DIVE TABLES OR A DIVE COMPUTER. NO PROCEDURE, DIVE COMPUTER OR DIVE TABLE WILL PREVENT THE
POSS IBILITY OF DCI OR OXYGEN TOXICITY! An individual’s physiological make up can vary from day to day. The dive computer cannot
account for these variations. You are strongly advised to remain well
within the exposure limits provided by the instrument to minimize the
risk of DCI. As an added measure of safety, you should consult a
physician regarding your fi tness before diving.
WARNING!
SUUNTO STRONGLY RECOMMENDS THAT SPORT DIVERS LIMIT
THEIR MAXIMUM DEPTH TO 40 M [130 FT] OR TO THE DEPTH
CALCULATED BY THE COMPUTER BASED ON THE SELECTED
O2% AND A MAXIMUM PO2 OF 1.4 BAR!
WARNING!
DIVES WITH REQUIRED DECOMPRESSION STOPS ARE NOT
RECOMMENDED. YOU SHOULD ASCEND AND BEGIN DECOMPRESSION IMMEDIATELY WHEN THE DIVE COMPUTER SHOWS
YOU THAT A DECOMPRESSION STOP IS REQUIRED! Note the
blinking ASC TIME symbol and the upward pointing arrow.
WARNING!
USE BACK-UP INSTRUMENTS! Make sure that you use back-up instrumentation including a depth gauge, submersible pressure gauge,
timer or watch, and have access to decompression tables whenever
diving with the dive computer.
WARNING!
PERFORM PRECHECKS! Always activate and check the device before diving in order to ensure that all Liquid Crystal Display (LCD)
segments are completely displayed, that the device has not run out
of battery power, and that the oxygen, altitude and personal adjustments are correct. Also, exit the Data Transfer (TR-PC) mode before
diving, as the computer does not automatically revert to Dive mode
from Data Transfer mode.
3
WARNING!
YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COMPUTER
COUNTS DOWN THE NO-FLYING TIME. ALWAYS ACTIVATE THE
COMPUTER TO CHECK THE REMAINING NO-FLY TIME PRIOR TO
FLYING! The computer goes into the stand-by display auto matically 5
minutes after the dive has ended. The stand-by display shuts off after
two hours. Flying or traveling to a higher altitude within no-fl y time can
greatly increase the risk of DCI. Review the recommendations given
by Diver’s Alert Network (DAN) in chapter 3.6.3. “Flying After Diving”.
There can never be a fl ying after diving rule that is guaranteed to
completely prevent decompression illness!
WARNING!
THE DIVE COMPUTER SHOULD NEVER BE TRADED OR SHARED
BETWEEN USERS WHILE IT IS IN OPERATION! Its information will
not apply to someone who has not been wearing it throughout a dive
or sequence of repetitive dives. Its dive profi les must match that of the
user. If it is left on the surface during any dive, it will give inaccurate
information for subsequent dives. No dive computer can take into account dives made without the computer. Thus any diving activity up
to four days prior to initial use of the computer may cause misleading
information and must be avoided.
WARNING!
DO NOT EXPOSE THE VYTEC´S OPTIONAL PRESSURE TRANSMITTER TO ANY GAS MIX CONTAINING MORE THAN 40%
OXYGEN! Enriched air with greater oxygen content presents a risk
of fi re or explosion and serious injury or death.
WARNING!
DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU HAVE
NOT PERSONALLY VERIFIED ITS CONTENTS AND ENTERED
THE ANALYZED VALUE INTO YOUR DIVE COM PUTER! Failure to
verify cylinder contents and enter the appro priate O2% into your dive
computer will result in incorrect dive planning information.
4
WARNING!
THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL PERCENTAGE VALUES OF OXYGEN CONCENTRATION. DO NOT
ROUND UP FRACTIONAL PERCENTAGES! For example, 31.8%
oxygen should be entered as 31%. Rounding up will cause nitrogen
percentages to be understated and will affect decompression calculations. If there is a desire to adjust the computer to provide more
conservative calculations, use the personal adjustment feature to affect decompression calculations or reduce the PO
oxygen exposure.
setting to affect
2
WARNING!
SET THE CORRECT ALTITUDE ADJUSTMENT MODE! When diving
at altitudes greater than 300 m [1000 ft] the Altitude Adjustment feature
must be correctly selected in order for the computer to calculate the
decompression status. The dive computer is not intended for use at
altitudes greater than 3000 m [10000 ft]. Failure to select the correct
Altitude Adjustment setting or diving above the maximum altitude limit
will result in erroneous dive and planning data.
WARNING!
SET THE CORRECT PERSONAL ADJUSTMENT MODE! Whenever it is believed that factors that tend to increase the possibility
of DCI exist, it is recommended that you use this option to make
the calculations more conservative. Failure to select the correct
Personal Adjustment setting will result in erroneous dive and planning
data.
NOTE!
It is not possible to change between Air, Nitrox and Gauge modes before
the instrument has counted down the no-fl ying time.
There is one exception to this: You can change from Air to Nitrox mode
even during the no-fl ying time. When planning both air and nitrox dives
during the same dive series, you should set the instrument in Nitrox mode
and modify the gas mix accordingly.
In Gauge mode, the no-fl ying time is always 48 hours.
5
TABLE OF CONTENTS
WARNINGS! .................................................................................................... 2
1. INTRODUCTION ......................................................................................... 8
1.1. SAFETY PRECAUTIONS ........................................................................ 9
1.1.1. Emergency Ascents ...................................................................... 9
1.1.2. Dive Computer Limitations ........................................................... 10
1.1.3. Nitrox ............................................................................................ 10
2. GETTING ACQUAINTED .............................................................................. 10
2.1. FUNCTIONS .......................................................................................... 10
2.2. PUSH BUTTONS .................................................................................... 11
2.3. WATER CONTACTS .............................................................................. 12
2.4. WIRELESS PRESSURE TRANSMISSION ............................................ 13
2.4.1. Installing the transmitter ............................................................... 13
2.4.2. Pairing and code selection ........................................................... 14
2.4.3. Transmission data ........................................................................ 15
3. DIVING WITH THE VYTEC ........................................................................... 17
3.1. BEFORE DIVING ................................................................................... 17
3.1.1. Activation and Prechecks ............................................................. 17
3.1.2. Battery indication ......................................................................... 18
3.1.2.1. Battery Power Indicator .................................................. 18
3.1.2.2. Wireless transmitter battery indicator ............................. 20
3.1.3. Dive Planning [PLAN] .................................................................. 20
3.1.4. User Defi nable Functions and Alarms .......................................... 21
3.2. SAFETY STOPS .................................................................................... 21
3.2.1. Recommended Safety Stop ......................................................... 21
3.2.2. Mandatory Safety Stop ................................................................ 22
3.2.3. Deep Stops .................................................................................. 23
3.3. DIVING IN AIR MODE ............................................................................ 23
3.3.1. Basic Dive Data ........................................................................... 23
3.3.2. Bookmark ..................................................................................... 24
3.3.3. Cylinder Pressure Data ................................................................ 24
3.3.4. Consumed Bottom Time (CBT) .................................................... 25
3.3.5. Ascent Rate Indicator ................................................................... 26
3.3.6. Safety Stops and Deep Stops ...................................................... 27
3.3.7. Decompression dives ................................................................... 27
3.4. DIVING IN NITROX MODE .................................................................... 30
3.4.1. Before Diving ............................................................................... 30
3.4.2. Oxygen Displays .......................................................................... 31
3.4.3. Oxygen Limit Fraction (OLF) ........................................................ 33
3.4.4. Gas Change, Multiple Breathing Gas Mixes ................................ 33
3.5. DIVING IN GAUGE MODE ..................................................................... 34
3.6. AT THE SURFACE ................................................................................. 35
3.6.1. Surface Interval ............................................................................ 35
3.6.2. Dive Numbering ........................................................................... 36
3.6.3. Flying After Diving ........................................................................ 37
3.7. AUDIBLE AND VISUAL ALARMS .......................................................... 38
3.8. HIGH ALTITUDE DIVES AND PERSONAL ADJUSTMENT ................... 40
6
3.8.1. Altitude Adjustment ...................................................................... 40
3.8.2. Personal Adjustment .................................................................... 40
3.9. ERROR CONDITIONS ........................................................................... 42
4. MENU BASED MODES ................................................................................ 43
4.1. MEMORIES AND DATA TRANSFER [1 MEMORY] ............................... 45
4.1.1. Logbook and Dive Profi le Memory [1 LOGBOOK] ....................... 45
4.1.2. Dive History Memory [2 HISTORY] .............................................. 48
4.1.3. Data Transfer and PC-Interface [3 TR-PC] .................................. 49
4.2. SIMULATION MODE [2 SIMUL] ............................................................. 50
4.2.1. Dive Simulator [1 SIMDIVE] ......................................................... 50
4.2.2. Dive Planning Simulator [2 SIMPLAN] ......................................... 51
4.3. SET MODES [3 SET] ............................................................................. 51
4.3.1. Dive Parameter Settings [1 SET DIVE] ........................................ 52
4.3.1.1. Altitude Adjustment, Personal Adjustment and RGBM
Settings and Safety Stop / Deep Stop [1AdJ MODE] ................... 52
4.3.1.2. Dive Time Alarm Setting [2 d ALARM] ............................ 53
4.3.1.3. Maximum Depth Alarm Setting [3 MAX DPTH] ............... 53
4.3.1.4. Nitrox/Oxygen Settings [4 NITROX] ............................... 53
4.3.2. Setting Time [2 SET TIME] ........................................................... 54
4.3.2.1. Adjusting Time [1 AdJ TIME] ........................................... 54
4.3.2.2. Adjusting Date [2 AdJ DATE] .......................................... 55
4.3.2.3. Adjusting Daily Alarm [3 T ALARM] ................................. 55
4.3.3. Setting Preferences [3 SET PREF] .............................................. 55
4.3.3.1. Backlight Setting [1 LIGHT] ............................................ 55
4.3.3.2. Dive Computer Units Setting [2 UNITS] .......................... 56
4.3.3.3. Wireless Transmission Settings [3 HP] ........................... 56
4.3.3.4. Profi le Sample Rate Setting [4 REC] .............................. 56
4.3.3.5. Dive Computer Model Setting [5 MODEL]
– AIR/NITROX/GAUGE .................................................. 56
5. CARE AND MAINTENANCE ......................................................................... 57
5.1. IMPORTANT INFORMATION ................................................................. 57
5.2. CARE OF YOUR DIVE COMPUTER ..................................................... 57
5.3. MAINTENANCE ..................................................................................... 58
5.4. WATER RESISTANCE INSPECTION .................................................... 58
5.5. BATTERY REPLACEMENT ................................................................... 59
5.5.1. Computer battery ......................................................................... 59
5.5.2. Wireless transmitter battery replacement .................................... 62
6. TECHNICAL DESCRIPTION ......................................................................... 64
6.1. OPERATING PRINCIPLES .................................................................... 64
6.2. SUUNTO REDUCED GRADIENT BUBBLE MODEL (RGBM) ............... 66
6.3. OXYGEN EXPOSURE ........................................................................... 67
6.4. TECHNICAL SPECIFICATION ............................................................... 68
7. WARRANTY ............................................................................................... 71
8. SUUNTOSPORTS.COM ............................................................................... 72
8.1. SYSTEM REQUIREMENTS ................................................................... 72
8.2. SUUNTOSPORTS.COM SECTIONS ..................................................... 73
8.3. GETTING STARTED .............................................................................. 74
9. GLOSSARY .............................................................................................. 75
7
1. INTRODUCTION
Congratulations on your purchase of the SUUNTO VYTEC advanced
dive computer. The Vytec builds on the Suunto tradition of delivering
feature-rich dive computers. The Suunto Vytec provides many new and
enhanced features that cannot be found in other dive computers, such
as gas switching and optional wireless air-integration. Push button controls access a wide selection of choices. The display is optimized for the
dive mode chosen. This air-integrated dive computer is a compact and
sophisticated multipurpose dive instrument, designed to give you years
of trouble-free service.
Choice of Operating Modes and Set-up Options
User options for the Vytec are selected using the push buttons.
Pre Dive confi guration and setup options include:
• Choice of operating mode – Air / Nitrox / Gauge
• Wireless Air Integration on/off
• Cylinder alarm setting
• Choice of unit – Metric / Imperial
• Maximum depth alarm
• Dive time alarm
• Backlight settings
• Clock, calendar, daily alarm
• Mix Oxygen fraction % (Nitrox mode only)
• Maximum PO
• Altitude adjustment
• Personal adjustment
• RGBM adjustment
• Sample rate setting 10, 20, 30 or 60 seconds for dive profi le
• Multiple breathing gases
The Suunto RGBM/ Deep Stop Algorithm
The Suunto Reduced Gradient Bubble Model (RGBM) utilized in the
Vytec predicts both dissolved and free gas in blood and tissues of divers.
It is a signifi cant advance on the classic Haldane models, which do not
predict free gas. The advantage of Suunto RGBM is additional safety
through its ability to adapt to a variety of situations and dive profi les.
The Suunto Vytec allows the user to choose between a traditional Recommended Safety Stop and Deep Stops. Deep Stops are decompression stops that occur deeper than traditional stops, with the purpose of
minimizing microbubble formation.
8
(Nitrox mode only)
2
In order to optimize how to respond to different added risk situations an
additional category of stop, referred to as a Mandatory Safety Stop, has
been introduced. Also a countdown for the Recommended Safety Stop
is included. The combination of stop types will depend on the specifi c
dive situation.
To get the most from the safety benefi ts be sure to read the summary
of the Reduced.
1.1. SAFETY PRECAUTIONS
Do not attempt to use the dive computer without reading this instruction
manual in its entirety, including all the warnings. Make sure that you fully
understand the use, displays and limitations of the instrument. If you
have any questions about the manual or the dive computer, contact your
SUUNTO dealer before diving with the dive computer.
Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN
SAFETY!
When used properly, the dive computer is an outstanding tool for assisting
properly trained, certifi ed divers in planning and executing sport dives.
It is NOT A SUBSTITUTE FOR CERTIFIED SCUBA INSTRUCTION,
including training in the principles of decompression.
Diving with enriched air mixtures (nitrox) exposes the user to risks
different from those associated with diving with standard air. These risks
are not obvious and require training to understand and avoid. Risks include possible serious injury or death.
Do not attempt to dive with any gas mix other than standard air without
fi rst receiving certifi ed training in this specialty.
1.1.1. Emergency Ascents
In the unlikely event that the dive computer malfunctions during a dive,
follow the emergency procedures provided by your certifi ed dive training
agency or, alternatively,
STEP 1: Assess the situation calmly and then move promptly to
STEP 2: At 18 m [60 ft], slow down your ascent rate to 10 m/min
STEP 3: Stay there as long as you assess your air supply will safely
less than 18 m [60 ft].
[33 ft/min] and move to a depth between 3 and 6 meters
[10 to 20 ft].
allow. After reaching the surface stay out of the water for
at least 24 hours.
9
1.1.2. Dive Computer Limitations
While the dive computer is based on current decompression research
and technology, you must realize that the computer cannot monitor the
actual physiological functions of an individual diver. All decompression
schedules currently known to the authors, including the U.S. Navy Tables,
are based on theoretical mathematical models, which are in tended to
serve as a guide to reduce the probability of decompression illness.
1.1.3. Nitrox
Diving with nitrox provides the diver with an opportunity to increase bottom times or reduce the risk of decompression illness by reducing the
nitrogen content in the breathing gas mix.
However, when the gas mix is altered, the oxygen content of the mix is
generally increased. This increase exposes the diver to an oxygen toxicity
risk not usually considered in recreational diving. In order to manage
this risk, the dive computer tracks the time and intensity of the oxygen
exposure and provides the diver with information to adjust the dive plan
in order to maintain oxygen exposure within reasonably safe limits.
In addition to the physiological effects of enriched air on the body there
are operational considerations to be addressed when handling altered
breathing mixes. Elevated concentrations of oxygen present a fi re or
explosion hazard. Consult with the manufacturer of your equipment in
regards to its compatibility with nitrox.
2. GETTING ACQUAINTED
2.1. FUNCTIONS
The Suunto VYTEC can be set to function as a regular air dive com puter,
a nitrox dive computer or as a depth gauge with timer mode.
The VYTEC multipurpose dive computer is an air integrated computer
featuring three dive computer modes (AIR, NITROX, GAUGE), three
main operating modes (TIME/STAND-BY, SURFACE, DIVING), three
menu based main modes (MEMORY, SIMULATION, SET) and 18 menu
based submodes (review separate Quick Reference Guide). You can
scroll through the modes using the push buttons. The mode indicator at
the left side and the mode text at the bottom of the display indicate the
selected mode.
10
The timekeeping display is the default display
of the instrument (Fig. 2.1.). If a button is not
pressed within 5 minutes, the dive com puter
beeps and returns to the timekeeping display
automatically (except in Diving and Simulation modes). The timekeeping display shuts
off after two hours, but pressing the PLAN or
TIME button activates it.
Making the Vytec personal
For best use of the Vytec take some time and
make it YOUR computer.
Set the correct time and date. Read this manual.
Set dive alarms and make all the other settings
listed in the introduction in this manual. Install
the Vytec in your console or fi t it on your wrist.
If the Vytec is to be used with the optional wireless pressure transmitter install it and enable
the pressure transmission in the Vytec’s settings. Try the pressure transmission.
Use the dive simulator for getting to know the
dive display
All this so you know your computer and have
it set up as you want it before getting into the
water.
2.2. PUSH BUTTONS
The dive computer has easy-to-use push
buttons and an advisory display, which guides
the user. The SMART (MODE) button is the
key to the system. The two scroll buttons,
PLAN and TIME, are used for scrolling up
and down the menus and to show the alternative displays. The dive computer is controlled
with these three push buttons as follows
(see Fig. 2.2.).
Fig. 2.1. Time keeping
display. Pressing PLAN
or TIME button activates
display.
Fig. 2.2. Push buttons
of the dive computer.
O
E
S
P
E
O
L
N
C
A
Fig 2.3. Depth sensor
(A), water/data transfer
contacts (B).
B
11
Press the SMART (MODE) button
• To activate the dive computer.
• To change from the Surface Mode to the menu based modes.
• To select, confi rm or quit a submode (short press).
• To immediately exit any submode to the Surface Mode
(long press).
• To activate the electroluminescent backlight (in the Surface
Mode hold down the mode button for more than two (2)
seconds, during a dive for one (1) second).
• To activate the gas change mode during a dive hold down the
mode button for more than two (2) seconds.
Press the arrow up scroll (PLAN) button
• To activate the timekeeping display, if the display is blank.
• To activate the Dive Planning in the Surface Mode.
• To make a special bookmark in the profi le memory during a dive.
• To scroll up the options (
s, increase).
Press the arrow down scroll (ALTER) button
• To activate the timekeeping display, if the display is blank.
• To activate the alternative display(s).
• To scroll down the options (
t, decrease).
The dive computer is controlled with the SMART (MODE/On/Backlight//
Select/OK/Quit) and the
s PLAN and TIME t push buttons and with the
water contacts as follows:
Activation press the SMART (On) button or immerse the
instrument in water for fi ve (5) seconds.
Dive Planning in the Surface Mode, press the PLAN (s) button.
Menu Modes press the SMART (MODE) -button.
The display is illuminated in surface mode by holding down the ≤SMART
button for more than two seconds .
2.3. WATER CONTACTS
The water contacts control the automatic activation of the Dive Mode.
The water and data transfer contacts are located on bottom of the case
(Fig 2.3). When submerged the water contacts are connected to the push
buttons (which are the other pole of the water contact) by the conductivity of the water. The “AC” text (Active Contacts, Fig. 2.4.) will appear on
display. The AC text will be shown until the water contact deactivates or
the dive computer enters the Dive Mode automatically.
12
2.4. WIRELESS CYLINDER
PRESSURE TRANSMISSION
The Vytec can be used together with an
optional wireless cylinder pressure transmitter
that can easily be attached to the high-pressure port of the regulator (Fig. 2.5). By using
the transmitter the diver can benefi t from cylin-
der pressure and remaining air time data.
In order to use the transmitter the wireless
integration needs to be enabled in the Vytec’s
settings. To enable or disable the wireless
integration refer to chapter 4.3.3.3 Cylinder
pressure settings.
2.4.1. Installing the Transmitter
Upon purchasing the Vytec, Suunto strongly
recommends you have your dealer attach the
transmitter to the fi rst stage of your regulator.
If you decide to attach it yourself, follow the
steps outlined below:
Remove the high pressure (HP) port plug
on the fi rst stage of your regulator using an
appropriate tool.
Thread the high pressure transmitter of the Vytec into the HP port of your regulator with your
fi ngers. DO NOT OVERTIGHTEN! Maxi mum
torque 6 Nm (4.4 ftlbs or 53 inlbs). Sealing is
based on a static o-ring, not force!
Attach the regulator to the scuba cylinder.
Slowly open the valve. Check for leaks by
submerging the regulator fi rst stage in water.
If leaks are detected, check the condition of
the o-ring and sealing surfaces.
Fig. 2.4. Active water
contacts are indicated
by the text AC.
Fig. 2.5. Vytec’s optional
wireless pressure transmitter.
13
2.4.2. Pairing and Code Selection
In order to receive wireless data the transmitter and the Vytec wrist unit
need to be paired. During the pairing procedure the transmitter and wrist
unit select a common transmission code.
The transmitter turns on when the pressure exceeds 15bar [218 psi] and
it then starts sending pressure data together with a code number. During
the pairing procedure the Vytec stores the above mentioned code number
and starts displaying pressure values that are received with that code.
This coding procedure inhibits data mix up from other divers also using
the Vytec’s transmitter.
When there is no stored code the Vytec will display “SETC” and receive
with lowered sensitivity from a very short distance only (Fig. 2.6 a). By
taking the Vytec close to the transmitter it will store the received code
and start receiving with full sensitivity and display data received with this
code only. The code is held stored for approximately 2 hours, or until the
cylinder pressure goes below 10 bar [145 psi]. The set code can also be
manually erased by the user.
To pair the transmitter and the wrist unit:
1. Make sure that the transmitter is properly attached to the regulators
HP port and that the regulator is properly attached to the cylinder.
2. Ensure that the Vytec is turned on, an that the wireless integration is
enabled in the Vytec’s settings (HP set on, see chapter 4.3.3.3). The
Vytec should display “SETC” in the lower left corner.
3. Slowly open the cylinder valve fully and pressurize the regulator. The
transmitter will start transmitting when the pressure exceeds 15bar
[218 psi].
4. Take the Vytec wrist unit close to the transmitter. The Vytec will now
shortly display the selected code number and then start displaying
the transmitted cylinder pressure. A lightning symbol will be displayed
every time the Vytec receives a valid signal.
WARNING:
In case there are several divers using Vytecs with wireless transmission always ensure that all divers are on different codes before
starting the dive.
14
The selected transmission code can later be
verifi ed via the alternative display, by pressing
the “TIME” button twice. If needed, the stored
m
code can be manually erased in this display
by pressing the “PLAN” (up) button and then
pressing “MODE” (select). The Vytec will now
erase the stored code and start displaying
DIVE
bar
TIME
m
“SETC” allowing a new pairing with the transmitter.
The alternative display showing the selected code reverts to the main display after 15
DIVE
bar
TIME
m
seconds in order to avoid accidental code
changes.
The user can manually change the transmitters code by reducing the pressure to less than
DIVE
bar
TIME
m
10 bar [145 psi] and then immediately (within
10-12s) increasing the pressure above 15 bar
[220 psi]. The transmitter will now select a new
code. The wrist unit must be in SETC mode to
pair on the new code. This procedure can be
DIVE
bar
TIME
m
used e.g. if your dive buddy has the same code
and you need to change the code.
NOTE: In order to save battery energy the
transmitter shuts off if the pressure remains
DIVE
bar
TIME
unchanged for more than 5 minutes and it
will continue transmitting with the saved code
when any pressure change is measured.
2.4.3. Transmission Data
Fig 2.6. Pressure
transmission related
displays.
After the pairing procedure the Vytec will receive cylinder pressure data
from the transmitter. The pressure is displayed in either bars or psi depending on the unit selection. Any time the Vytec receives an appropriate signal it fl ashes the lightning fi gure in the display’s lower left corner.
A pressure reading of over 360 bar [5220 psi] will display as “---“ (Fig.
2.6 b).
If the Vytec is unable to receive a valid signal for more than one minute
it will start displaying “FAIL” intermittently with the latest valid pressure
reading (Fig. 2.6 c).
15
In case the transmitter battery is running low, a low battery warning
“LOBT” will be transmitted and displayed intermittently with the pressure
reading on the Vytec (Fig.2.6 d).
If the dive is started without that the Vytec and the transmitter have been
properly paired, the Vytec will indicate that no cylinder data is available
by displaying “OFF” (Fig. 2.6 e).
TABLE 2.1. PRESSURE TRANSMISSION RELATED DISPLAYS
Display Indication Figure 2.6
SETC Set Code. No code stored,
wrist unit ready for pairing with transmitter. a
- - - Pressure reading over 360 bar [5220 psi] b
FAIL Indicates pressure reading has not been
updated in more than 1 minute.
Transmitter is out of range, in power saving
mode or on another channel. Activate the
transmitter by breathing off the regulator,
and recode the wrist unit if necessary. c
LOBT Indicates pressure transmitter battery voltage d
is low. Change the transmitter battery!
OFF Pairing has not been conducted before e
start of dive. No cylinder data available.
16
3. DIVING WITH THE VYTEC
This section contains instructions on how to
operate the dive computer and interpret its
displays. You will fi nd that this dive computer
is easy to use and read. Each display shows
only the data relevant to that specifi c diving
situation.
m
DIVE
ft
CEILING
S
L
O
MAXAVGPO2
W
ASC TIME
STOP
NO
SURF
O2%
AIR
OLF
C
B
T
°
°
F
QUIT
OK
SELECT
NO DEC TIME
TIME
psi
C
bar
DIVE
TIME
OPTIONS
3.1. BEFORE DIVING
3.1.1. Activation and Prechecks
The dive computer will activate if submerged
deeper than 0.5 m (1.5 ft). However, it is necessary to turn on the Dive Mode before diving
to check the cylinder pressure, altitude and
personal adjustment settings, battery condition, oxygen settings etc. Press the SMART
(Mode) button to activate the in strument.
After activation all display elements will turn
on showing mostly fi gure 8’s and graphi-
cal elements (Fig. 3.1.). A few seconds later
the battery power indicator is shown and
the backlight and the buzzer are acti vated
(Fig. 3.2. display a, b, c or d depending on the
battery voltage). If set to Air mode the screen
will enter the Surface mode (Fig. 3.3.). If set to
Gauge mode the text GAUGE is shown (Fig.
3.4.) and if set to Nitrox mode the essential
oxygen parameters are shown with the text NITROX (Fig. 3.21.) before the Surface mode.
At this time, perform your prechecks making
sure that:
• the instrument operates in the correct
mode and provides a complete display
(Air/Nitrox/Gauge modes)
• the low battery indicator is not on
• the altitude, personal adjustment,
RGBM and safety/deep stops settings
are correct
Fig. 3.1. Startup I.
All segments shown.
OK
QUIT
Fig. 3.2. Startup II.
Battery power indicator.
17
m
DIVE
bar
TIME
°
C
Fig 3.3. Startup III. Surface mode. Depth and
dive time are zero and
cylinder pressure is 300
bar [4350 psi]. Pressing
TIME button activates
alternative display of
temperature and current
time.
Fig. 3.4. Startup IV. Gauge
mode.
m
• the instrument displays correct units of
measurement (Metric/Imperial)
• the instrument displays correct
temperature and depth (0.0 m [0 ft])
• the buzzer beeps
IIf the optional wireless pressure trans-mitter
is used (see chapter 2.4. Wireless pressure
TIME
transmission) ensure that:
• the pressure transmitter has been properly attached and that the cy linder
valve is open
• the transmitter and the wrist unit have
been properly paired on a suitable
code
• the pressure transmitter is working
(lightning symbol blinks, cylinder pressure is displayed), and that there
is no low battery warningdisplayed
• you have enough air for your
planneddive. You should also check
the pressure reading against your
back-up pressure gauge.
And if set to Nitrox mode (refer to chapter 3.4
Diving in Nitrox mode), make sure that:
• the correct number of mixes are set
and that the oxygen percentages are
adjusted according to the measured
Nitrox blends in your cylinders
• the oxygen partial pressure limits are
set correctly.
The dive computer is now ready for diving.
DIVE
bar
TIME
Fig. 3.5. Low Battery
Warning. Battery symbol
indicates that the battery is low and battery
replacement is recommended.
18
3.1.2. Battery Indication
3.1.2.1. Battery Power Indicator
This dive computer has a unique graphic Battery Power Indicator designed to give you an
advance notice of impending need to change
the battery.
The Battery Power Indicator can always be seen when the Dive Mode is
activated. The electroluminescent backlight will be on during the battery
check. The following Table and Figure show the various warning levels.
TABLE 3.1. BATTERY POWER INDICATOR
Display Operation Figure 3.2
BAT + 4 segments + OK Normal, full battery. a
BAT + 3 segments Normal, battery power is getting
low or the temperature is low.
Battery replacement is
recommended,
if you are going
to colder conditions or if you are
planning to make a dive trip. b
LOWBAT + Battery power is low and
2 segments + the battery replacement is c
low battery symbol recommended.
The battery symbol is displayed.
The backlight is disabled. c
LOWBAT +
1 segment + QUIT+
low battery symbol Change the battery! d
Returns to the Time display.
Activation and all functions
are disabled.
Temperature or an internal oxidation of the
battery affects the battery voltage. If the instrument is stored for a long period, the low
battery warning may be displayed even though
DIVE
MAX
QUIT
NO DEC TIME
the battery has enough capacity. The low battery warning may also be displayed at low temperatures, even though the battery has enough
capacity in warmer conditions. In these cases
repeat the battery check procedure.
After battery check the Low Battery Warning is
indicated by the battery symbol (Fig. 3.5.).
Fig. 3.6. Dive Planning.
Planning mode is indicated by PLAN text. Nodecompression time limit
at 30.0 m [100 ft] is 14
minutes in A0/P1 mode.
19
If the battery symbol is displayed in the Surface mode or if the display is
faded or weak, the battery may be too low to operate the dive computer
and battery replacement is recommended.
NOTE! For safety reasons the backlight cannot be activated when the
low battery warning is indicated by the battery symbol.
3.1.2.2. Wireless Transmitter Battery Indicator
The pressure transmitter sends out a lowbat (LOBT) warning when its
battery voltage is getting low. This is shown intermittently instead of the
pressure reading (see chapter 2.4.3, Fig 2.6). When you get this warning
the pressure transmitter battery needs to be replaced.
3.1.3. Dive Planning [PLAN]
To enter Planning Mode, press the PLAN button at any time during Surface Mode. After showing the text “PLAN” (Fig. 3.6.), the display will show
the no-decompression limit for the depth of 9 m [30 ft]. By pressing the
down arrow (t) (TIME) button, the dive computer will calculate and show
the next deeper no-decompression limits in 3 m [10 ft] increments ending
at 45 m [150 ft]. By pressing the up arrow (s) (PLAN) button, the next
shallower depth will be shown again.
The Planning Mode is canceled by pressing the SMART (QUIT) button.
NOTE! The Planning mode is disabled in Gauge mode and in Error mode
(see section 3.9. ”Error Conditions”). The planning mode calculates no
dec times for MIX1 only. If additional mixes are enabled in the Nitrox
mode they do not affect the calculations in PLAN mode.
Higher Altitude and conservative Personal Adjustment Modes will shorten
the no-decompression time limits. These limits at different Altitude and
Personal Adjustment Mode selections are shown in Table 6.1 and 6.2 in
section 6.1. ”Operating Principles”.
The Planning mode also accounts for the following information from previous dives:
• any calculated residual nitrogen
• all dive history for the past four days
• oxygen toxicity (Nitrox mode)
The no-decompression times given for different depths will therefore be
shorter than before your fi rst “fresh” dive.
DIVE NUMBERING SHOWN DURING DIVE PLANNING
Dives belong to the same repetitive dive series, if the instrument was still
counting down the no-fl y time at the beginning of the dive.
20
The surface interval must be at least 5 minutes for a dive to be considered
a repetitive dive. Otherwise, it is considered a continuation of the same
dive. The dive number will not change and the dive time will continue,
where it left off (see also section 3.6.2. “Dive Numbering”).
3.1.4. User Defi nable Functions and Alarms
This Vytec has several User Defi nable Functions and depth and time
related alarms that you can set according to your personal preference.
The dive computer model, unit of measurement and backlight preferences can be set in the MODE- SET- SET PREF submode. The dive time
and the depth alarms can be set in the MODE- SET- SET DIVE submode
and the alarm clock can be set in the MODE- SET- SET TIME submode.
Setting of the user defi nable functions and alarms are explained in detail
in section 4.3. “Set Modes”.
3.2. SAFETY STOPS
Safety stops are widely considered “good diving practice” and are an
integral part of most dive tables. Reasons to perform a safety stop include
a reduction in sub clinical DCI, microbubble reduction, ascent control, and
orientation before surfacing.
The Vytec displays two different types of safety stops: Recommended
Safety Stop and Mandatory Safety Stop.
The Safety Stops are indicated by:
- STOP label, when in the depth range 3 m – 6 m [10 ft - 20 ft] =
Recommended Safety Stop Countdown
- STOP+ CEILING label, when in the depth range 3 m – 6 m
[10 ft - 20 ft] = Mandatory Safety Stop Time display
- STOP label, when deeper than 6 m = Mandatory Safety Stop
scheduled
3.2.1. Recommended Safety Stop
With every dive over 10 meters the instrument has a three minute countdown for the recommended safety stop, to be taken in the 3 - 6 meter
[10 ft - 20 ft] range. This is shown with the STOP sign and a three-minute
countdown in the center window instead of the no-decompression time
(Fig. 3.11.).
The Recommended Safety Stop, as the name implies, is recommended.
If it is ignored, there is no penalty applied to the following surface intervals and dives.
21
3.2.2. Mandatory Safety Stop
m
MAX
NO DEC TIME
C
B
T
bar
DIVE
TIME
Fig. 3.7. Dive has just begun
and no air time is shown.
First estimate of remaining
air time will be shown after
30-60 seconds.
m
MAX
MAX
AIR
TIME
NO DEC TIME
C
B
T
bar
DIVE TIME
Fig. 3.8. Diving display. Present depth is 19.3 m
[63 ft] and no-decompression
stop time limit is 23 minutes
in A0/P1 mode. Maximum
depth during this dive was
19.8 m [65 ft], elapsed dive
time is 16 minutes.
m
MAX
MAX
AIR
TIME
NO DEC TIME
C
B
T
bar
DIVE TIME
°
C
Fig. 3.9. Diving display. Present cylinder pressure is 210 bar [3045 psi]
and remaining air time 41 minutes. Alternative display of current time and
temperature is shown for 5 seconds after pressing TIME button.
22
When the ascent rate exceeds 12 meters/min
[40 ft] momentarily or 10 meters/min [33ft] continuously the micro-bubble build-up is predicted
to be more than allowed for in the decompression model. The Suunto RGBM calculation
model responds to this by adding a Mandatory
Safety Stop to the dive. The time of this Mandatory Safety Stop will depend on the severity of
the ascent rate excess.
The STOP sign will appear in the display and
when you reach the depth zone between 6 m to
3 m [20 ft to 10] also the CEILING label, ceiling
depth and the calculated Safety Stop time appear
in the display. You should wait until the Mandatory
Safety Stop warning disappears (Fig. 3.14.).
The Mandatory Safety Stop time always includes the three minute Re commended Safety
Stop time. The total length of the Mandatory
Safety Stop time depends on the seriousness
of the ascent rate violation.
You must not ascend shallower than 3 m [10 ft]
with the Mandatory Safety Stop warning on. If
you ascend above the Mandatory Safety Stop
ceiling, a downward pointing arrow will appear
and a continuous beeping starts (Fig. 3.15.).
You should immediately descend to, or below,
the Mandatory Safety Stop ceiling depth. If you
correct this situation at any time during that dive,
there are no affects on the decompression calculations for future dives.
If you continue to violate the Mandatory Safety
Stop, the tissue calculation model is affected
and the dive computer shortens the available
no-decompression time for your next dive. In
this situation, it is recommended to prolong your
surface interval time before your next dive.
TIME
3.2.3. Deep Stops
The Suunto Vytec allows the user to choose a deep stop algorithm
instead or the traditional recommended safety stop. Deep Stops are
decompression stops that occur deeper than traditional stops, with the
purpose of minimizing microbubble formation and excitation.
The Suunto RGBM model calculates deep stop iteratively, placing the
fi rst stop about halfway between the maximum depth and the ceiling
depth. After the fi rst deep stop has been completed, another deep stop
will be prompted halfway to the ceiling, and so on until the ceiling depth
is reached.
The deep stop length can be set to 1 or 2 minutes.
Enabling the Deep Stops disables the Recommended Safety Stops, but
the Mandatory Safety Stops due to e.g. continuous ascent rate violations
are still prompted.
3.3. DIVING IN AIR MODE
The Vytec has three operating modes: Air mode for diving with standard
air only, Nitrox mode for diving with oxygen enriched (EANx) mixtures and
Gauge mode for use as bottomtimer. The Air mode is enabled in the MODESET-SET PREF-MODEL submode (see section 4.3. “Set Modes”).
3.3.1. Basic Dive Data
The dive computer will remain in the Surface mode at depths less than
1.2 m [4 feet]. At depths greater than 1.2 m the instrument will go into
the Diving mode (Fig. 3.7.).
All information on the display is labeled (Fig. 3.7. and 3.8.). During a nodecompression stop dive, the following information will be displayed:
• your present depth in meters [ft]
• the maximum depth during this dive in meters [ft], indicated as MAX
• the available no-decompression time in minutes in the center
window as NO DEC TIME and as a bar graph on the left side of
the display. It is calculated based on the fi ve factors described in
section 6.1. ”Operating Principles”.
• the water in temperature in °C [°F] in the lower left corner
• the elapsed dive time in minutes, shown as DIVE TIME in the
lower right corner
• the Altitude Adjustment setting on the left side of the center window
with a wave and mountain symbols (A0, A1, or A2) (see Table 3.4.)
23
m
MAX
AIR
TIME
NO DEC TIME
C
B
T
bar
DIVE TIME
Fig. 3.10. Bookmark
activation. An annotation,
Bookmark, is placed
in the profi le memory during
a dive by pressing PLAN
button. Note the Logbook
symbol.
m
MAX
STOP
AIR
TIME
C
B
T
bar
DIVE TIME
Fig. 3.11. A three minute
Recommended Safety
Stop.
m
MAX
AIR
TIME
NO DEC TIME
C
B
T
bar
DIVE TIME
Fig. 3.12. Cylinder pressure warnings. Pressure
has dropped below 50 bar
[725 psi]. Pressure display is blinking and there
is an audible alarm.
24
• the Personal Adjustment setting on the
left side of the center window with a
diver symbol and + signs (P0, P1, or
P2) (see Table 3.5.)
• the Diver Attention Symbol if attenuated
RGBM has been set (see Table 3.3.)
• blinking Diver Attention Symbol if
surface interval should be prolonged
(see Table 3.3.)
In addition with the optional wireless transmission enabled:
• the Remaining Air-time in the left
center window
• the cylinder pressure in bar [or psi]
displayed in the lower left corner
Alternative displays by pressing the TIME button (Fig. 3.9.):
• the current time, shown as TIME
• the water temperature in °C [°F]
NOTE! In Dive Mode the alternative display switches back to the main display after 5 se conds.
3.3.2. Bookmark
It is possible to make special marks in the profi le
memory during a dive. These Bookmarks will be
shown as a dive log symbol when scrolling the
profi le memory on the computer display. The
Bookmarks will also be shown as annotations
in the PC-software, Suunto Dive Manager. To
make a bookmark on the profi le memory during
a dive press the PLAN button (Fig. 3.10.).
3.3.3. Cylinder Pressure Data
When using the optional wireless pressure
transmitter the pressure of your scuba cylinder
in bars [psi] will be shown digitally in the lower
left corner of the display Anytime you enter
into a dive, the remaining air time calculation
begins. After 30 - 60 seconds (sometimes
more, depending on your air consumption),
the fi rst estimation of remaining air time will be
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