Uwatec ALADIN PRO ULTRA User manual

OPERATING MANUAL
American
SWISS MADE BY UWATEC AG
THE SYSTEM
®
American
®
Active Light
Feet
PRO ULTRA

2Uwatec®Aladin®Pro Ultra
Operating scheme
Operating scheme
for surface functions
2
3
54
5sec
(or 3min)
(or 3min)
3s
(or 3min) (or 3min)
NO STOP
depth dive time
deco info
automatically
Sleep
Surface Sleep
1
Ready or
Surface
Input stage Input stage
Battery
capacity
LOGBOOK
LOGBOOK
DIVEPLAN
Input stage
DIVEPLAN
O2 % MIX
O2 % MIX
(or 3min)
(or 3min)
6
max. depth
B and E B and + B and –

3
Uwatec®Aladin®Pro Ultra
American
The following symbols are used in the operating manual:
Uwatec®Aladin®Pro Ultra
Indicates a potentially hazardous situation which, if not avoided, could result
in death or serious injury.
This operating manual makes use of the following icons to indicate especially important comments:
Remarks: Informations and tips which are important for optimal use of the functions of
your Aladin®Pro Ultra.
- + E
B
Operating instruction for manual input
Example: bridging contacts B and E
Flashing display
Acoustic alarm signal
Important remarks concerning signal words and symbols
January 2000, Copyright by Uwatec Switzerland
WARNING

4
Safety considerations
Uwatec®Aladin®Pro Ultra
You must carefully read and understand this entire manual before using your Aladin®Pro Ultra.
Diving has many inherent risks. Even if you follow the instructions of this
manual in a careful manner, it is still possible that you may be seriously inju-
red or die from decompression sickness, oxygen toxicity or some other inhe-
rent risk of scuba Nitrox or compressed air. Unless you are fully aware of these
risks and are willing to personally accept and assume responsibility for those
risks, do not use the Aladin®Pro Ultra!
The Aladin®Pro Ultra is a decompression tool to assist a trained and certified diver in making decisions
concerning dive planning and execution. As with any tool, the Aladin®Pro Ultra may be misused if the fol-
lowing safety and operational precautions are not strictly followed. If they are followed, careful use of the
Aladin®Pro Ultra can increase your diving enjoyment and reduce your risk of decompression sickness. If
they are not, you will be placing yourself at serious risk for decompression sickness.While the Aladin®Pro
Ultra is a technically advanced tool based on mathematical models of decompression sickness and oxygen
toxicity, neither it nor any other diving computer (or table) can exactly monitor the physiological changes
that occur in your body as you dive. In addition, each diver will vary in his or her susceptibility to decom-
pression sickness. In addition, each diver will vary in his or her susceptibility to decompression sickness. In
addition to this, each individual diver‘s own susceptibility may vary from day to day. Combined with the
fact that decompression modelling is an inexact science, and must be based to
some extend on certain
unproven assumptions, it is emphasis on you, the individual diver, to dive responsibly and to carefully follow all
standard safe diving practices as well as the recommendations contained in this manual.
Guidelines for the use of Aladin®Pro Ultra:
The following guidelines for using Aladin®Pro Ultra are derived from the latest medical research and the
recommendations of the American Academy of Underwater Sciences for diving with diving computers.
Following these guidelines will greatly increase your safety while diving, but cannot guarantee that decom-
pression sickness will not occur.
–
The Pro Ultra is designed for dives with nitrox (max.50 %O2)and compressed air (21%O2) only. Do not use
the Pro Ultra for dives made with other mixed gases. It is absolutely necessary to check the set mixture
before each dive and to compare it to the gas mixture actually used. Always remember: Setting a wrong
mixture carries an inhered risk of decompression sickness and/or oxygen toxicity!
–Always check the diving limits considering the oxygen content and standard sports diving procedures
WARNING

5
Safety considerations
Uwatec®Aladin®Pro Ultra
American
(decompression sickness, oxygen toxicity).
–Do not use the Aladin®Pro Ultra for planned decompression diving. The decompression algorithm con-
tained in the Aladin®Pro Ultra should be used only for emergency or unintended decompression.
–In accordance with the recommended maximum diving limit of all instructional agencies, do not dive
deeper than 130 feet.
–The danger of nitrogen narcosis has to be taken into consideration for all dives regardless of the gas mix-
ture. The Aladin®Pro Ultra gives no warning about this.
–On all dives with the Ultra, make a safety stop for at least 1 to 3 minutes within the 10 to 15 feet zone.
–Always make the deepest dive of the day first when repetitive dives are planned, and for each dive make
sure that the deepest portion of that dive is done at the beginning of the dive.
–All divers using dive computers to plan dives and indicate or determine decompression status must use
their own computer which they take with them on all dives.
–If the Pro Ultra fails at any time during the dive, the dive must be terminated, and appropriate surfacing
procedures (including a slow ascent and a 3 to 5 minute safety stop) should be initiated immediately.
–On any given dive, all divers in a buddy group must follow the most conservative dive computer for that
particular dive.
–You should not dive for a period of twenty-four hours before activating the Aladin®Pro Ultra (or any
borrowed or rented dive computer) to use it to plan or control your diving.
–You MUST follow the ascent rates as indicated by the Aladin®Pro Ultra, and should the computer fail
for any reason, you must ascend at a rate of no greater than 30 feet per minute.
–You MUST be familiar with all signs and symptoms of decompression sickness before using the Aladin®
Pro Ultra! Seek IMMEDIATE treatment for decompression sickness should any of these signs or sym-
ptoms occur after a dive! There is a direct correlation between the effectiveness of treatment and the
delay between the onset of symptoms and the treatment for decompression sickness.
–Always observe the optical and acoustic alarm signals of the Aladin®Pro Ultra. Avoid situations of increa-
sed risk which are marked with a warning sign in this operating manual.
–Never dive the Aladin®Pro Ultra to the limits. Neither the Aladin®Pro Ultra, nor any other diving com-
puter or decompression table should be pushed to its limit. Give yourself a margin of safety by always
leaving at least a few minutes in the “no-stop“box before making your ascent.
–Avoid repeated ascents and descents (yo-yo diving) while using the Aladin®Pro Ultra.
–See also page 11, 54, 55, 83.

6Uwatec®Aladin®Pro Ultra
Aladin®Pro Ultra –The Diving System
- + E
B
MemoMouse and
logbook software
DataTrak (Option)
Screen Guard
(Optional: several colours)
Dive Computer
Aladin®Pro Ultra

7
Uwatec®Aladin®Pro Ultra
American
List of chapters
Aladin®Pro Ultra –Introduction ______9
1 Aladin®Pro Ultra –Introduction _________10
2 Aladin®Pro Ultra –More Safety in Diving _10
3 Safety Considerations ______________11, 12
4 Pro Ultra –Your Personal Companion ____13
5 The Calculation Model ZH-L8 ADT
5.1 Description _______________________14
5.2 Advantages ______________________15
6 Safety in Diving _______________________16
Aladin®Pro Ultra –The System _______17
1 Description___________________________18
2 Dive Computer
2.1 Operation ________________________19
Switching on display _______________19
Switching off display _______________19
Active backlight ___________________20
2.2 Operating surface
functions _________________________21
2.3 Operating mode___________________26
Diving with Aladin®
Pro Ultra ____________________________31
1 Terminology/Symbols __________________32
1.1 Display during no-stop phase________32
1.2 Display during decompression phase__33
1.3 Nitrox information _________________34
2 Attention Messages and Alarms _________35
2.1 Attention messages ________________35
2.2 Alarms ___________________________37
2.3 Alarm low battery _________________38
I
3 Preparation for the Dive ________________39
3.1 Switching on______________________39
3.2 Setting gas mixture ________________40
4 Functions during the Dive ______________41
4.1 Dive time_________________________41
4.2 Current depth_____________________41
4.3 Maximum depth___________________41
4.4 Ascent rate _______________________42
4.5 Partial pressure of oxygen (ppO
2
)_____44
4.6 Oxygen toxicity (CNS O
2
%)__________45
4.7 Decompression information _________46
5 Functions at the Surface________________48
5.1 End of a dive _____________________48
5.2 Desaturation time _________________48
5.3 No fly time _______________________49
5.4 Warning of bubbles ________________50
6 Diving in Mountain Lakes ___________51, 52
Diving at Reduced Risk with
Aladin®Pro Ultra ____________________53
1 Diving at Reduced Risk with
Aladin®Pro Ultra
1.1 Diving at reduced risk ______________54
1.2 Diving at reduced risk for the first dive 54
1.3 Minimizing risk on repetitive dives____55
1.4 Response in increased risk situation56-58
Logbook ____________________________59
1 Survey_______________________________60
2 Selection and Activation________________61
3 Selection of Dive ______________________62
II
III
IV
V

8Uwatec®Aladin®Pro Ultra
VII
4 Leaving the Logbook-Mode ____________63
5 Output on PC ________________________64
Dive Planner ________________________65
1 Survey_______________________________66
2 Selection and Activation from
Ready-Mode__________________________67
3 Selection and Activation from
Surface-Mode ________________________68
4 Planning a No-Stop Dive _______________69
5 Planning a Decompression Dive _________71
6 Planning a Nitrox-dive__________________72
6.1 Calculation of maximum depth ______72
6.2 Calculation of mixture for a
given depth __________________________73
7 Leaving the Diveplan-Mode _____________74
Communication Software
for Windows®_______________________75
1 MemoMouse, DataTrak and DataTalk
1.1 Personal programming of the
dive computer (DataTalk) ___________76
1.2 Analysis and storage of real
dives (DataTrak) ___________________76
1.3 Updates (DataTrak, DataTalk) ________76
Trouble Shooting ____________________77
1 Trouble Shooting ______________________78
Appendix ___________________________79
1 Maintenance of Aladin®Pro Ultra________80
List of chapters
2 Technical Information _________________81
3 Warranty ___________________________82
3.1 Ecognition of warranty _____________82
3.2 Scope of the warranty______________82
3.3 Warranty period and claim __________82
4 Safety considerations __________________83
5 Serial No. / Dealer address ______________84
VIII
IX
VI

9
Introduction
I Uwatec®Aladin®Pro Ultra
American
1 Aladin®Pro Ultra – Introduction ________________________________________ 10
2 Aladin®Pro Ultra – More Safety in Diving ________________________________________ 10
3 Safety Considerations _____________________________________ 11, 12
4 Aladin®Pro Ultra – Your Personal Companion ________________________________________ 13
5 The Calculation Model ZH-L8 ADT 5.1 Description _______________________________ 14
5.2 Advantages ______________________________ 15
6 Safety in Diving ________________________________________ 16
I

10
Aladin®Pro Ultra …
I Uwatec®Aladin®Pro Ultra
1 Introduction
What can further increase your diving pleasure?
The good feeling of having the highest possible
safety and freedom to move. A dive computer
which constantly controls the data of your dive and
your individual behaviour meets these require-
ments. Aladin®Pro Ultra watches over the nitrogen
and oxygen toxicity of your body without interrup-
tion. With Aladin®Pro Ultra you dive more safely
than ever before. In addition, Aladin®Pro Ultra
offers an unmatched comfort in carrying and ope-
ration. Aladin®Pro Ultra gives you increased safety
due to its calculation model.
2 More Safety in Diving
Nitrox is a gas mixture consisting of nitrogen and
oxygen. The kind of air used for diving with com-
pressed air is the same as the normal air of the
earth‘s atmosphere (78% nitrogen, 21% oxygen
and 1% inert gases). Therefore, normal air is also
Nitrox!
When talking of Nitrox as the breathing gas for
diving, it concerns a mixture with a higher share of
oxygen. A higher share of oxygen (and automati-
cally the reduction of the share of nitrogen) has the
advantage of lengthening the no-stop phase (or
reducing the decompression phase), since less
nitrogen is dissolved in the diver‘s body during the
dive.
But the higher share of oxygen in the Nitrox-mixtu-
re also causes additional physiological problems by
the toxic effects at a higher partial pressure of oxy-
gen (ppO
2
). When breathing oxygen at a higher
partial pressure, two kinds of oxygen toxicity can
occur:
• CNS damages:
Symptoms of poisoning occurring at short notice in
the central nervous system (CNS). Such symptom
s
are: irritations of the respiratory organs, sickness,
headache, pulmonary oedema, cramps, uncons-
ciousness. The symptoms occur at a ppO
2
of
essentially more than 1 bar and depend on the
length of exposure and on the partial pressure of
oxygen.
• Damages of the lungs:
Symptoms of pulmonary poisoning occuring in
the long run. The symptoms occur at a ppO
2
from
0.5 bar and higher and with terms of exposure in
the range of hours/days.

11
Aladin®Pro Ultra …
I Uwatec®Aladin®Pro Ultra
American
I
Aladin®Pro Ultra considers the short term toxic
effect of oxygen (CNS damages) by means of the so
called „oxygen-clock“. It is based on a list which
shows the units of toxicity for oxygen per unit of
time in dependence of the ppO
2
. The indication of
toxicity uses „CNS O
2
%“ (= relative toxicity of oxy-
gen for the central nervous system). CNS O
2
= 0%
corresponds to the normal state before the first
dive, and CNS O
2
= 100% corresponds to the criti-
cal upper limit. The list, initially published by the US
Navy, is nowadays known by the name IANTD-list.
We modified this list for the use with Aladin®Pro
Ultra in cooperation with Dr. Bill Hamilton,
Hamilton Research Ltd. (Tarrytown, NY), a well-
known specialist.
The long term kind of oxygen poisoning has prac-
tically no relevance for diving with independent
diving equipment and is therefore not considered in
the design of Aladin®Pro Ultra.
The physiological peculiarities of oxygen and the
changing decompression due to the reduced share
of nitrogen require a profound training, if nitrox is
used for diving. Additional technical problems with
the use and the maintenance of parts of the equip-
ment bear further dangers when diving with nitrox.
Therefore, we recommend to adhere to the follo-
wing guidelines by all means.
3 Safety Considerations
1.Only dive with nitrox if you have been trained thoroughly by a recognised
institution.
2.Only use Aladin®Pro Ultra with open breathing systems. Aladin®Pro Ultra
must be set for a determined gas mixture. In partially-open and in closed cir-
culation-systems, the gas mixture can vary considerably. The calculations may
yield results different from those necessary for the actual mixture.
3.Only use Aladin®Pro Ultra for diving with an independent breathing appara-
tus. Aladin®Pro Ultra is not designed for long-term exposures with Nitrox.
WARNING

12
Aladin®Pro Ultra …
I Uwatec®Aladin®Pro Ultra
4.Aladin®Pro Ultra always calculates considering the gas mixture set by the
user. It is absolutely necessary to check the set mixture before each dive and
to compare it to the gas mixture actually used. Maximum deviation from the
measured mixture must not exceed 1% O2. A wrong gas mixture can be lethal!
5.Aladin®Pro Ultra disposes of a pp O2 -warning, the default-limits of which are
set at 1.5 bar pp O2 max. This limit can be adjusted via MemoMouse/Data Talk
in the range of 1.2 to 1.95 bar. An alternation of the pp O2 max to higher than
1.6 bar is risky and we do not recommend it.
6.Frequently check the „oxygen-clock“ (CNS
O2 Limit), especially in the range
higher than 1.5 bar pp O2 . Close the dive if the CNS O2 Limit exceeds 75%.
7.Make sure you have a sufficiently long surface interval, just as when diving
with compressed air. Oxygen also needs sufficient time to leave the body. Go
on the next dive only when the CNS
O2 % has dropped below 40%.
8.Of course, Aladin®Pro Ultra is a personal instrument like any other diving
computer. This also applies when diving with compressed air between two
nitrox-dives. Aladin®Pro Ultra can be adjusted to compressed air (21% oxy-
gen) and then also includes the calculation of the CNS
O2 % in the same way
as with any other nitrox-dive.
9.Always remember: setting a wrong mixture causes either insufficient decom-
pression calculations or a too low calculation of the oxygen-toxicity!
WARNING

13
4 Aladin®Pro Ultra - Your Personal Companion
I Uwatec®Aladin®Pro Ultra
American
By considering your individual gas mixture, depth
and time profile and water temperature, the
Aladin®Pro Ultra can be considered a personal
diving control instrument. Relying on the latest
results of medical and physiological research for its
decompression modeling, the Aladin
®
Pro Ultra
differs
from earlier diving computers in a number
of significant ways:
• The ZH-L8 ADT decompression calculation model
considers eight body tissues as well as ambient
temperature. This allows for a more precise cal-
culation of a modelled risk for decompression
sickness which can lead to greater diving safety.
• The Aladin®Pro Ultra uses both optical and acou-
stic alarms. The acoustic alarm uses varied sound
signals to assist in establishing the reason for the
alarm.
You must strictly observe all optical and acoustic
alarms and take appropriate action based upon
those alarms to avoid serious injury or death
from decompression sickness!
I
• By using the Aladin®Pro Ultra‘s logbook, a diver
may directly call up information from the last 19
dives. The last 37 dives and 200 minutes of dive
profile in intervals of 20 seconds can be read out
into a MemoMouse, which can be later interfaced
with a personal computer (Windows®). The
MemoMouse can store up to 66 hours of diving
data.
• The dive planner allows the advance planning of
no stop dives and decompression dives with rea-
dily determinable surface intervals.
Although the Aladin®Pro Ultra can be used to
plan decompression dives, such dives are
beyond the realm of recreational or sport
diving and must not be attempted by recrea-
tional or sport scuba divers.
• The Aladin®Pro Ultra is designed to be mounted
on the diver‘s left or right wrist, which offers the
maximum freedom of movement as well as easy
operation and use.
WARNING
WARNING

14
5 The Calculation Model ZH-L8 ADT
I Uwatec®Aladin®Pro Ultra
5.1 Description
The Aladin® Pro Ultra uses a new decompression
calculation model known as the ZH-L8 ADT. This
model uses eight compartments or “tissue“ groups
with nominal half time periods from 5 to 640 minu-
tes. This model differs considerably from other
models by its consideration of the following addi-
tional physiological processes:
1.Blood perfusion to the body‘s organs is not con-
stant. Skin and muscle tissues are in particular
subject to changes in blood perfusion, depending
on temperature. Changes in blood perfusion to
these organs change their nitrogen saturation
tolerance. The model used by the Aladin®Pro
Ultra takes these effects into account and thus
the “skin“ and “muscle“ compartments in the
Aladin®Pro Ultra show variable half-time periods
and saturation tolerances.
Decompression information is calculated accor-
ding to the diver‘s individual behaviour and
decrease in skin temperature. The decrease in
skin temperature is based upon the water tem-
perature and the dive time. By considering these
changes in saturation, the time that must be
spent at the surface prior to flying may be consi-
derably increased, depending upon the depth,
time, and temperature of a dive, as well as the
diver‘s behaviour during that dive.
2.The decompression model used by the Aladin®
Pro Ultra considers nitrogen in both its dissolved
as well as its gaseous phase (microbubbles).
Formation of microbubbles is considered to be a
strong indicator of a high risk of decompression
sickness. The Aladin®Pro Ultra model calculates
the formation of microbubbles depending on
various assumed influences in arterial and venous
blood. In normal, slow ascents, microbubbles
form mainly in venous blood. During fast ascents,
microbubbles may also form in arterial blood and
in the body‘s tissues as well. If a particular dive
profile may result in the creation of microbubbles
according to the Aladin®Pro Ultra‘s model,
decreased bottom time and/or increased decom-
pression times as well as increased “no fly“ time
will be indicated.
• Microbubbles can form if the diver makes too
fast an ascent, ignores required decompression
stops, or makes repeated ascents during a dive
(yo-yo diving). These microbubbles can form in
arterial blood as well as in the body‘s tissues. If
these microbubbles partially impair circulation,
the rate of gas diffusion and saturation tolerance
for those tissues immediately surrounding this
area of impaired circulation are changed. If requi-
red decompression time will be adjusted in such
a way that already existing microbubbles will stop
growing. Increased decompression time will also
assist those local areas of impaired circulation to
desaturate with less risk of decompression
sickness.

15
5 The Calculation Model ZH-L8 ADT
I Uwatec®Aladin®Pro Ultra
American
• The calculation of microbubbles results in altered
ascent instructions. If microbubbles are assumed
to be present based on the data used by the
Aladin®Pro Ultra, the ascent rate to the surface is
reduced to 23 feet/minute. This will help prevent
the formation of microbubbles in the arterial cir-
culation and minimizes formation of microbub-
bles in the venous circulation after the dive.
I
5.2 Advantages
On the first dives following responsible diving pro-
cedures, a diver using the Aladin®Pro Ultra should
never require decompression stops, although a one
to three minute safety stop between 10 and 15
feet is recommended for every dive. If, however,
unplanned circumstances arise during the dive
which increase the risk of decompression, the
Aladin®Pro Ultra can, if closely followed, reduce
the risk of decompression sickness by increasing
decompression time. Some of the more common
risk situations are as follows:
• Repetitive dives, especially those deeper than 60
feet and those with short surface intervals.
• Repetitive dives using square dive profiles.
•
Repetitive diving over the course of several
successive days.
• Diving in cold water.
• Diving with increased workloads.
• Yo-yo diving (repeated descents and ascents to
the surface during a given dive).
• Flying within 24 hours after diving.
• Excessive ascent rate.
If a diver experiences any of these risk factors while
diving, the Aladin®Pro Ultra will add required
decompression time in order to help minimize the
risk of decompression sickness.
If signs or symptoms of decompression sickness
occur after diving with Aladin®Pro Ultra, seek
IMMEDIATE treatment at the nearest recom-
pression facility.
Do not use the Aladin®Pro Ultra for planned
decompression dives!
WARNING

With its new decompression model the Aladin®Pro
Ultra is an extremely versatile tool which can
increase
your diving comfort and safety. As with
any diving tool, however, ultimate responsibility for
diving safety remains with the individual diver. The
same responsible diving practices taught by all
diving certification agencies are still absolutely
necessary in order to safely dive with the Aladin®
Pro Ultra.
Certain mistakes which may be made by a diver,
such as ascending at an excessive rate, going too
deep, or staying too long at depth, may be overco-
me if the diver carefully follows the Aladin®Pro
Ultra‘s corrected ascent instructions. Of course, the
Aladin®Pro Ultra can do nothing to prevent the
occurrence of lung overexpansion injuries or nitro-
gen narcosis, whose avoidance lies solely with the
individual diver. The Aladin®Pro Ultra is a highly
sophisticated technical instrument which, if used
16
6 Safety in Diving
I Uwatec®Aladin®Pro Ultra
and maintained properly, will have high reliability.
Despite this no dive should be made with an
Aladin®Pro Ultra without a thorough understan-
ding of decompression theory and dive table use,
and every diver must have a set of decompression
tables with him on every dive.
Do not use the Aladin®Pro Ultra without a set
of accepted nitrox diving tables with you as a
back up decompression tool on every dive.
Should decompression sickness occur, whether
the Aladin
®
Pro Ultra was used correctly or not, a
detailed history of the previous dives may be used
to allow a better diagnosis and the most effective
treatment for the diver.
WARNING

17
Aladin®Pro Ultra – The System
II Uwatec®Aladin®Pro Ultra
American
1 Description ________________________________________ 18
2 Dive Computer 2.1 Operation _______________________________ 19
Switching on display_______________________ 19
Switching off display ______________________ 19
Active backlight __________________________ 20
2.2 Operating the surface functions ____________ 21
2.3 Operating modes _________________________ 26
II

18
1 Description
II Uwatec®Aladin®Pro Ultra
The Aladin®Pro Ultra system consists of two units:
1The dive computer displays only the important general dive-
and decompression data.
2The dive computer has a data memory which stores the dive
data. The data can be downloaded out into a MemoMouse
from where they can be transmitted to a Windows®personal
computer with the logbook program DataTrak. MemoMouse
and DataTrak are available as an option.
depth dive time
max. depth deco info
CNS O2LIMIT
NO STOP
%
Screen Guard
(Optional: several colours)
2
1

19
2 Dive Computer
II Uwatec®Aladin®Pro Ultra
American
2.1 Operation
Switching on display:
– automatically, on submerging in water or when adaptation to atmospheric
pressure is necessary.
– manually by manipulating contacts on housing.
Switching off display: – automatically, after three minutes without operation.
The Aladin®Pro Ultra has 4 operating contacts B, E, +, – on the outside of the housing. For manual ope-
ration, touch base contact B and any one of the other three contacts above the display with moistened
fingers.
Contact B:
Base contact, which has to be touched for all operations.
Contact E:
Enter contact. It serves the switching on of the computer, the activation of log-
book and dive-plan mode and the switching between no-stop and decompres-
sion planning. It is also used to confirm inputs and is therefore comparable to
the ENTER- or RETURN-key of a computer.
+ / – contacts:
They initiate the selection of the logbook and dive-plan as well as the setting
of values (time, depth, dive-number, O
2
% mix etc.).
II
- + E
B

20
2 Dive Computer
II Uwatec®Aladin®Pro Ultra
Active backlight
The display of the Aladin®Pro Ultra can be illuminated both on the surface and underwater.
The backlight can be switched on by pressing the unit above the display.
The light will turn off automatically after 7 seconds.
The backlight can only be activated if the computer display is on.
• The active backlight is no substitute for a dive torch. When diving at
night or at increased depth we recommend the use of a dive torch.
• Replace the battery if the battery warning appears. See page 38.
WARNING