ALADIN ALADIN PRO User manual

1
SWISS MADE BY UWATEC AG
DECOMPRESSION COMPUTER
OPERATING MANUAL
depth dive time
deco info
max. depth
NO STOP
®
®
English

Operating Manual Aladin®Pro
Aladin®Pro is a valuable diving companion which offers you highest possible comfort and a so far
never reached standard of safety, if you strictly observe the following rules:
– Aladin®Prodoesnot replaceeithera profounddiving trainingor adiving
partner!
– Always dive according to your level or training. Aladin®Pro does not
increase your abilities as a diver!
– Due to the danger of nitrogen narcosis do not dive deeper than 40 m.
Aladin®Pro does not warn you in this respect.
– Strictly obey the optical and acoustic alarm signals of Aladin®Pro. Avoid
risk situations, which are marked or in this operating manual.
– You must read this operating manual carefully and completely!
B
Remarks about Safety
December 1995, Copyright by Uwatec, Switzerland

Operating Manual Aladin®Pro
Aladin®Pro
C
–+ E
depth dive time
deco info
max. depth
DIVE
®
B
• Dive Computer
Aladin®Pro
• Interface and Logbook Software
DataTrak/DataTalk (Option)
• Logbook (Option)
• External Memory
Extension (Option)

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Operating Manual Aladin®Pro
This operating manual makes use of the following icons to indicate especially important comments:
Remarks: Information and tips which are important for optimal use of the functions of your
Aladin®Pro.
Attention! Informationwhichdrawsyourattentiontosituationsandspecialfeaturesimportant
for your diving comfort and the early avoidance of risk situations.
Danger! Alarms which indicate risk situations and dangers. Ignoring these warnings can
leadto situations involving danger to life andlimb. Thesealarmsmust be obeyed!
The following symbols are used in the operating manual:
Important Remarks
D
Flashing display
Acoustic alarm signal
Operating instruction for manual input
(Example: bridging contacts B and E)
B
E
- +

1
I Introduction
I
I INTRODUCTION
1 Aladin®Pro – With More Safety ______________________________________ 2
2 Aladin®Pro – Your Personal Companion ______________________________________ 3
3 The Calculation Model ZH-L8 ADT 3.1 Description ____________________________ 5
3.2 Advantages ____________________________ 6
4 Safety in Diving ______________________________________ 8

2I Introduction
1 Aladin®Pro – With More Safety
Impressive operational features, advanced safety
information and robust reliability combine to make
theAladin®Pro an outstanding dive computer. A new
and revolutionary decompression model is
incorporated in this Aladin®Pro, providing
a greater level of safety.
Aladin®Pro displays only the
information necessary at the time
so that it is both easy to read and
understand. It‘s simple operation and comfort
in use are obvious from the first dive.
The new generation Aladin®
Pro provides an increased
level of safety and more
features together with
it‘s traditional ease of
use. Read this operating manual carefully and to
the last page!

3
I Introduction
I
Aladin®Pro considers your individual reactions during
the dive, the cooling of your skin and includes your
workload as a constant value in the calculations.
The test results of medical and physiological research
were taken into consideration. The new calculation
model also predicts and considers the effects of the
formation of micro-bubbles in both the venous and
arterial circulation depending on workload and skin
temperature. This has led to the development of a
unique, adaptive calculation model.
Aladin®Pro was exclusively designed for diving with
compressed air and distinguishes itself from previous
models and other commercial diving computers in a
number of significant ways.
• The ZH-L8 ADT decompression calculation model
considers eight body tissues as well as the diver's
conduct and the ambient conditions. This allows
for an even more precise calculation of the risk of
decompressionsicknesswhichincreasesdiversafety.
• Compared to all previous models the Aladin®Pro is
muchmoreof a personal instrument,as itconsiders
the individual conduct of the diver.
Different actions by diving buddies can lead to
distinctive differences in the display of the decom-
pression information. This is because risk situations
(violations of diving rules) can have a significant
effect onthe physiologicalprocesses.On theother
hand Aladin®Pro ‘rewards’ good diving conduct.
• The diver's workload is incorporated in the decom-
pression calculations as a constant value. For the
calculation of the surface intervals and the
decompression information for repetitive dives the
newmodelcalculatesonthebasisthatthephysical
performance at the surface is smaller than during
the dive.
• Alarms are given optically and acoustically, the
reasonscan be distinguished by the characteristics
of the sound series.
2 Aladin®Pro –Your Personal Companion

4I Introduction
2 Aladin®Pro – Your Personal Companion
• By means of the logbook, the diver can directly
call up the information of the last 19 dives. Via
interface to the PC, 37 dives and
200 minutes of precise dive-profile
in intervals of 20 seconds can
be read out.
• The dive planner allows
the advance planning of
no-stop dives and decom-
pression dives with freely
determinable surface intervals.
• Aladin®Pro is designed to be
mounted on the diver's wrist or built
in consoles.
• Ease of operation, ease of under-
standing the unambiguous display,
enhanced safety advice, the PC interface
option and comfort in use are all strong features
of the new Aladin®Pro.

5
I Introduction
I
3 Calculation Model ZH-L8 ADT
3.1 Description
The Model ZH-L8 ADT (8 compartments with a nomi-
nal half-time periods from 5 to 640 minutes) differs
considerably from other models by the consideration
of additional physiological processes:
1. Bloodperfusion of the organs is not constant.Skin
and in particular muscles are subject to
considerable changes of blood perfusion
depending on temperature and workload. A
change in blood perfusion also causes a change
ofthesaturationtolerance.The model takes these
effects into account. Therefore, skin and muscle
compartmentsshow variablehalf-time periods and
saturation tolerances.
Thenecessarydecompressiontimes arecalculated
accordingto the workloadandthedecreasingskin
temperature. The decrease of skin temperature is
estimated based on the water temperature and
the dive time. At the surface, the diver’s physical
performance is lower than during the dive. By
consideringthedifferencesinphysicalperformance
the no fly time becomes considerably longer.
2. The model considers inert gas not only in the
dissolved state, but also in the gaseous phase
(microbubbles). Formation of microbubbles is
calculatedwith allowancefor thedifferent influen-
ces in arterial and venous blood. With normal
ascents gas bubbles mainly form in venous blood,
with fast ascents also in arterial blood and on
ignoring decompression stops in the tissues. As
themodel calculatesmicrobubbles,those physiolo-
gical processes are reconstructed which actually
occur.
The bubbles on the venous side of the circulation
are carried into the lungs where they change the
arterial nitrogen pressure. This influences mainly
repetitivedives,diveswithverylong decompression
times and the no fly time.

6I Introduction
3 Calculation Model ZH-L8 ADT
• Gross disregard of the ascent rate, exceeding the
decompression depth and repeated ascents to the
surface (yoyo dives), can all cause microbubbles to
form on the arterial side and in tissues. Where the
bubbles partially impair circulation, the rate of gas
diffusionandthesaturationtolerance arechanged.
Decompression time, and if necessary decom-
pression depth, are adjusted so that existing
bubbles stop growing. In addition, altered
decompression assures that the tissue desaturates
sufficientlyifmicrobubblesimpaircirculationlocally.
• The calculation of the gas bubbles results in a new
ascentinstruction. The ascentratenear the surface
is reduced down to 7m/min. This prevents with
high reliability the formation of microbubbles in
thearterial circulationandminimizes theformation
ofmicrobubblesin the venous circulation after the
dive.
3.2 Advantages
On first dives with correct diving technique and
avoiding risk situations, there are no extended
decompressiontimes.Onthe other hand, it ispossible
to react correctly in risk situations due to the realistic
simulation of the physiological processes in the body.
This increases safety considerably. Risk situations are,
for example:
• Repetitivedives (especially withshortintervals) and
dives on several successive days
• Dives in cold water
• Yoyo dives
• Flying after the dive