THE SYSTEM

OPERATING MANUAL

dive time

O2 % MIX

NO STOP

max. depth

deco info

English

SWISS MADE BY UWATEC AG

Safety considerations
You must carefully read this entire manual before using your Aladin Pro Nitrox. Diving has many inherent risks. Even if you follow the instructions of this manual in a careful fashion, it is still possible that you may be seriously injured or die from decompression sickness, oxygen toxicity or some other inherent risk of scuba nitrox. 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 Nitrox! The Aladin Pro Nitrox 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 Nitrox may be misused if the following safety and operational precautions are not strictly followed. If they are followed, careful use of the Aladin Pro Nitrox 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 Nitrox is a technically advanced tool based on biophysical models of decompression sickness and oxygen toxicity, neither it nor any other diving computer (or table) can actually monitor the physiological changes that occur in your body as you dive. In addition, each diver will vary in his or her susceptibility to decompression sickness. Not only that, but each individual divers own susceptibility may vary from day to day. Combined with the fact that decompression modelling is an inexact science, and of necessity must be based at least partly on certain unproven assumptions, it is incumbent upon you, the individual diver, to dive responsibly and to carefully follow all standard safe diving practices as well as the admonitions contained in this manual.
Operating Manual Aladin Pro Nitrox
Aladin Pro NitroxThe Diving System

th div

dec o in fo
Interface and logbook software DataTrak (Option)
Dive Computer Aladin Pro Nitrox
Important remarks concerning signal words and symbols
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 Nitrox.
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
The following symbols are used in the operating manual: Flashing display
Acoustic alarm signal B Operating instruction for manual input (Example: bridging contacts B and E) +E February 1996, Copyright by Uwatec Switzerland
Guidelines for the use of Aladin Pro Nitrox: The following guidelines for using Aladin Pro Nitrox are derived from the latest medical research for diving with diving computers. Following these guidelines will greatly increase your safety while diving, but cannot guarantee that decompression sickness will not occur. The Aladin Pro Nitrox is designed for dives made with nitrox and compressed air (21% O2) only. Do not use the Aladin Pro Nitrox for dives made with other mixed gases. It is essential to check the set mixture before each dive and to compare it to the gas mixture to be used. Always remember: Setting a wrong mixture causes either insufficient decompression calculations or a too low calculation of the oxygen-toxicity! Do not dive deeper than 40 metres. Always check the diving limits given by the chosen percentage of oxygen. On all dives with the Aladin Pro Nitrox, make a safety stop for three to five minutes within the 3 to 9 metre zone. Always make the deepest dive of the day first when repetitive dives are planned, and for each successive 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. If the Aladin Pro Nitrox 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 Nitrox to use it to plan or control your diving. Always observe the optical and acoustic alarm signals of the Aladin Pro Nitrox. Avoid situations of increased risk which are marked with a warning sign in this operating manual.

LIST OF CHAPTERS I II III INTRODUCTION ALADIN PRO NITROX THE SYSTEM DIVING WITH ALADIN PRO NITROX 27

I II III

IV DIVING AT REDUCED RISK WITH ALADIN PRO NITROX V LOGBOOK

55 IV 65

VI DIVE PLANNER VII INTERFACE DATATRAK / DATATALK VIII TROUBLE SHOOTING IX APPENDIX, Maintenance, Technical Information, Warranty
71 VI 81 VII 85 VIII 89 IX

I INTRODUCTION

1 Aladin Pro Nitrox: Introduction 2 Aladin Pro Nitrox More Safety in Diving 3 Aladin Pro Nitrox Your Personal Companion 4 The Calculation Model ZH-L8 ADT ______________________________________ 2 ______________________________________ 3 ______________________________________ 6 4.1 Description _________________________ 7 4.2 Advantages ________________________ 9 _____________________________________ 10

5 Safety in Diving

I Introduction
1 Aladin Pro Nitrox 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 requirements. Aladin Pro Nitrox watches over the nitrogen and oxygen saturation of your body without interruption. With Aladin Pro Nitrox you dive more safely than ever before. In addition, Aladin Pro Nitrox offers an unmatched comfort in carrying and operation. Aladin Pro Nitrox gives you increased safety due to the new calculation model. All informations necessary for safe diving are combined in one instrument. The Aladin Pro Nitrox can increase both your diving pleasure and safety by reducing your risk of decompression sickness provided you carefully follow the instructions and guidelines given you in this manual. Unlike previous diving computers, which only base their decompression information on depth and time data, the Aladin Pro Nitrox also considers the temperature which is known to be additional risk factor for decompression sickness. Aladin Pro Nitrox allows you to plan and execute dives with a greater degree of safety than with previous models of decompres sion computers.
Please read this operating manual carefully and to the last page.
2 Aladin Pro Nitrox More Safety in Diving I
Nitrox is a gas mixture consisting of nitrogen and oxygen. The kind of air used for diving with compressed air is the same as the normal air of the earths 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 describes a mixture with a higher percentage of oxygen. A higher percentage of oxygen (and automatically the reduction of nitrogen) has the advantage of lengthening the no-stop phase (or reducing the decompression phase), since less nitrogen is dissolved in the divers body during the dive. The higher share of oxygen in the Nitrox-mixture also causes additional physiological problems by the toxic effects at a higher partial pressure of oxygen (ppO2). When breathing oxygen at a higher partial pressure, two kinds of oxygen toxicity can occur: CNS damages: Symptoms of poisoning occuring at short notice in the central nervous system(CNS). Such symptoms are: irritations of the respiratory organs, sickness, headache, pulmonary oedema, cramps, unconsciousness. The symptoms occur at a ppO2 of more than 1 bar and depend on the term 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 ppO2 from 0.5 bar and higher and with terms of exposure in the range of days/weeks. Aladin Pro Nitrox 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 and is dependent on the ppO2. The indication of toxicity is shown as CNS O2 LIMIT (= relative toxicity of oxygen

2 Aladin Pro Nitrox More Safety in Diving
for the central nervous system). CNS O2 LIMIT 0% corresponds to the normal state before the first dive, and CNS O2 LIMIT 100% corresponds to the critical upper limit. The list, initially published by the US Navy, is nowadays known by the names IANTD- or NOAAlist. We modified this list for the use with Aladin Pro Nitrox in cooperation with Dr. Bill Hamilton, Hamilton Research Ltd. (Tarrytown, NY), a well-known specialist. The long term kind of oxygen poisoning has practically no relevance for diving with independent diving equipment and is therefore not considered in the design of Aladin Pro Nitrox. If nitrox is used for diving profound additional training is needed because of the physiological peculiarities of oxygen and the changing decompression due to the reduced percentage of nitrogen.Additional technical problems with the use and the maintenance of parts of the equipment are additional potential dangers when diving with nitrox. Therefore, we recommend strict adherence to the following guidelines.
1. Only dive with nitrox if you have been trained thoroughly by a recognised agency. 2. Only use Aladin Pro Nitrox with open breathing systems. Aladin Pro Nitrox must be set for a determined gas mixture. In partially-open and in closed circulation-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 Nitrox for diving with an independent breathing apparatus. Aladin Pro Nitrox is not designed for long-term exposures with Nitrox.
4. Aladin Pro Nitrox always calculates considering the gas mixture set by the user. It is essential to check the mixture calculation before each dive and to compare it to the gas mixture to be used. Maximum deviation from the mixture calculation must not exceed 1% O2. A wrong gas mixture can be lethal! 5. Aladin Pro Nitrox has a ppO2-warning, the default-limits of which are set at 1.5 bar ppO2max. This limit can be adjusted via Interface/Data Talk in the range of 1.2 to 1.95 bar. An alternation of the ppO2max to higher than 1.6 bar is risky and is not recommended. 6. Frequently check the oxygen-clock (CNS O2 Limit), especially when the ppO2 is greater than 1.5 bar. 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 Limit has dropped below 40%. 8. Aladin Pro Nitrox is a personal instrument like any other diving computer. This still applies when diving with compressed air (21% oxygen) between two nitrox-dives. Aladin Pro Nitrox can be adjusted to compressed air and then also includes the calculation of the CNS O2 Limit in the same way as with any other nitrox-dive. 9. Always remember: setting a wrong mixture causes either insufficient decompression calculations or a too low calculation of the oxygen-toxicity!

Ready-mode

th dive

o info

4.b) Activating the logbook: B and E. Aladin Pro Nitrox shows the most recent dive.
4.c) Leaving the logbook: B and E or automatically after three minutes.
Surface-mode or after 3 minutes
5. a) Selecting the O2% Mix function: B and. Cancel: B and +: or automatically after three minutes.

O2 MIX

5.b) Activating the O2% Mix function: B and E By B and + or B and the percentage of oxygen is set.

or after 3 minutes

5.c) Leaving the O2% Mix function: B and E or automatically after three minutes (new setting is not accepted).
6.a) Selecting the dive-plan function From ready or surface mode: Twice B and Cancel: Twice B and + or automatically after three minutes without operation.
6.b) Activating the dive-plan B and E. Aladin Pro Nitrox starts by listing no-stop times. If the dive-plan is activated out of the surfacemode, first enter the desired interval by B and + or B and. Confirmation with B and E.
6.c) Leaving the dive-plan: B and E for approx. 3 seconds: or automatically after three minutes.

2.3 Operating modes

Aladin Pro Nitrox works in various operating modes: Sleep-mode: Activation: automatically When Aladin Pro Nitrox is not used, it is in the sleep-mode. The display does not show any information. The computer is briefly activated once every minute to measure atmospheric pressure. The display remains switched off. If a change in altitude is recognized, Aladin Pro Nitrox switches to -> surfacemode for 3 minutes.
DO NOT FLY DIVEPLAN LOGBOOK

S L O W

Ready-mode: Activation: By touching contacts B and E from sleep-mode. To check the display, all signs light up for 5 seconds.

DECOSTOP

ft h m
After activation the Aladin Pro Nitrox switches into ready-mode. Once in readymode, the display is switched on and the set percentage of oxygen is shown. In certain circumstances altitude sections are also displayed. By touching contacts B and E in the ready-mode once more, Aladin Pro Nitrox will display the remaining battery capacity in percent. Three minutes after activating the ready-mode, Aladin Pro Nitrox will fall back into the -> sleep-mode.

Dive-mode: Activation: automatically at depth of about 0.5 m. In dive-mode, all diving functions are monitored, i.e. depth and dive time are displayed, maximum depth is stored, saturation of tissues is calculated, no-stop time or decompression prognosis is determined, ascent rate is controlled and displayed and the correctness of the decompression procedure is supervised. The set percentage of oxygen is displayed at the beginning of a dive until maximum depth is reached, but at least for the first 5 minutes of the dive.

dive time dive time

max. depth max. depth deco info deco info
Wait-mode: Activation: automatically on reaching the surface The wait-mode is activated if the the diver surfaces (diving depth less than 0.5 m). At the surface, the dive is not completed and entered into the logbook for an interval of 5 minutes. This allows the short surfacing for orientation or tank exchange. During the 5 minutes waiting time, the set percentage of oxygen is displayed alternatively with the maximum depth.
Surface-mode: Activation: automatically after a dive or when changing altitude. After a dive has been completed, Aladin Pro Nitrox is in surface-mode. All data belonging to the surface interval are calculated and displayed: simulation of microbubble formation, actualization of oxygen toxicity and nitrogen saturation of the tissues depending on the calculated skin temperature and the assumed work load at the surface, calculation of desaturation time, and no fly interval. Desaturation time is determined either by oxygen- or nitrogen saturation, value becomes 0%.
In order to save energy, Aladin Pro Nitrox falls into the surface-sleep after 3 minutes. The functions of surface-mode are then carried out in the background. The atmospheric pressure is measured in surface-sleep once every minute. If the atmospheric pressure decreases, for example in case of change of altitude, Aladin Pro Nitrox switches from sleep-mode or from surface-sleep into surfacemode automatically and displays the adaptation time. The adaptation time is the time after which all body tissues have adapted to the ambient pressure (= desaturation time).

2 Attention Messages and Alarms
3 Preparation for the Dive 4 Functions during the Dive
5 Functions at the Surface
6 Diving in Mountain Lakes
_____________________________________ 53
III Diving with Aladin Pro Nitrox

1 Terminology/Symbols

The information on the display of the Aladin Pro Nitrox varies depending on the kind of dive and the dive phase. 1.1 Display during no-stop phase No-stop phase: Dive phase during which ascent is allowed without decompression stops. Dive time: Time of the dive below depth of 1.2 m. CNS O2 Limit: Oxygen toxicity

no-stop phase

decompression phase

current depth A

C 24min
maximal depth D dive time

B no-stop time

1.2 Display during decompression phase Decompression depth: Lowest stage is displayed. Decompression time: Prescribed duration of the decompression stop at the displayed decompression stage. Total ascent time to surface: Total ascent time including decompression stops. CNS O2% Limit: Oxygen toxicity
A (7 min) total ascent time to surface
lowest deco-stop 2 min decompression time

no-stop range

decompression range

39,0 m

1.3 Nitrox information (O2 information) For dives with compressed air in normal recreational diving nitrogen is the decisive gas for the decompression calculations. When diving with nitrox, the toxicity of oxygen rises with the increase of the portion of oxygen and increasing depth and can limit dive time. Aladin Pro Nitrox includes this in the calculations and displays the necessary information: <O2 % MIX> Percentage of oxygen: The percentage of oxygen in the Nitrox mixture can be set between 21% (normal compressed air) and 50%. Partial pressure of oxygen: The higher the percentage of oxygen in the used mixture, the smaller the dive depth at which the tolerable partial pressure of oxygen (ppO2 max) is reached. Aladin Pro Nitrox does not display the value, but warns the diver when he reaches the tolerable maximum depth. Oxygen toxicity: With the increased percentage of oxygen, the oxygen in the tissues, especially in the central nervous system (CNS) becomes important for the decompression calculations. If the partial pressure of oxygen rises above 0.5 bar, the tissues begin to saturate with O2.

ppO2 max

<CNS O2 LIMIT>
Nitrox diving may only be attempted by experienced divers with special training.
O2 Toxizitt sinkt 0,5 bar

O2 Toxizitt steigt

Aladin Pro Nitrox draws the divers attention to certain situations and warns the diver of unsafe diving practices. Attention messages and alarms are always optical and acoustic under water, only optical at the surface except the decompression alarm. The acoustic attention messages (but not the alarms) can be switched off (see chapter VII Interface page 82). 2.1 Attention messages Attention messages are communicated to the diver visually by symbols, letters or flashing figures. In addition, two short acoustic sequences can be heard (in an interval of 4 seconds) in two different frequencies. Attention messages come up in the following situations: 4 sec Dive in mountain lake On a change of altitude, the altitude section (0-3) and adaptation time is shown. See page 53.

4 Functions during the Dive
4.1 Dive time The whole time spent below a depth of 1.2 metres is displayed as dive time in minutes. While the dive time is running, the colon on the right of the figures is flashing in one second intervals. Maximum dive time displayed is 199 minutes.
If a dive lasts longer than 199 minutes the dive time display starts again at 0 minutes, because the display cannot show a larger figure.
4.2 Current depth Current depth is given in 10 cm-increments. On switching on and at a diving depth of less than 1.2 metres the void display <> appears.
Depth measurement is based on freshwater. Therefore, Aladin Pro Nitrox shows a slightly greater depth than actually true when diving in salt water, depending on the salinity of the water.
4.3 Maximum depth The maximum depth is displayed if it is lower than the current depth. To prevent the display changing very frequently when diving in the vicinity of the maximum depth, it is only displayed if it exceeds the current depth by more than 1 metre.
The percentage of oxygen is displayed instead of the maximum depth until a first maximum depth is reached (but at least for the first 5 minutes of the dive).

4.4 Ascent rate

Optimal ascent rate varies depending on depth between 7 and 20 m/min. It is displayed in percent of the reference variable. If the ascent rate is greater than 100% of the set value, the black arrow <SLOW> appears. If the ascent rate exceeds 140%, the arrow starts flashing. The Aladin Pro Nitrox provides an acoustic alarm if the ascent rate is 110% or greater of the set value. The intensity of the alarm increases in direct proportion to the degree that the prescribed ascent rate is exceeded.
The prescribed ascent rate must be observed at all times! Exceeding the prescribed ascent rate can lead to microbubbles in the arterial circulation which can lead to serious injury or death due to decompression sickness. The Aladin Pro Nitrox may require a decompression stop even within the nostop phase because of the danger of formation of microbubbles due to an improper ascent. The decompression time necessary for the prevention of microbubbles can increase massively if the ascent rate is exceeded. From great depth, too slow an ascent may cause heightened saturation of tissues and an extension of both decompression time and total ascent time. At shallow depth, a slow ascent may shorten the decompression time because the tissues are desaturating during the slow ascent. The display of the ascent rate has priority over the <CNS O2LIMIT>) display.

Decompression values

On entering the decompression phase, the arrow NO STOP disappears. The arrow DECOSTOP appears. Right beside the arrow, the deepest decompression stage in metres is displayed. Beside the decompression depth, the decompression time is displayed in minutes for this stage. The display <3m5:> means that a decompression stop of 5 minutes at a depth of 3 metres has to be made. When a decompression stop has been finished, the next higher decompression stop is displayed. When all decompression stops have been made, the arrow NO STOP DECOSTOP extinguishes and the arrow reappears. The indication of time on the lower right shows the no-stop time again. The decompression alarm is activated if the decompression stop is ignored. The arrow DECOSTOP begins flashing and an acoustic alarm is initiated. Due to the formation of microbubbles decompression can increase massively if a decompression stop is ignored. When the surface is reached during the decompression alarm, the arrow DECOSTOP continues flashing, in order to point to the risk of a decompression accident. The SOS-mode is activated 3 minutes after the dive if corrective action is not taken. If the total (cumulative) duration of the decompression alarm is longer than a minute, it is entered in the logbook. Response: Descend to the prescribed decompression depth immediately!

Total time of ascent

As soon as decompression stops are necessary, Aladin Pro Nitrox shows the total time of ascent. The time of ascent to the first decompression stage and all decompression stops are included. The time of ascent is calculated on the basis of the prescribed ascent rate. Total time of ascent can be subject to change if the ascent rate is not ideal (100%).
5.1 End of a dive After reaching the surface, Aladin Pro Nitrox switches into wait-mode automatically for five minutes. This is the time span necessary to recognize the end of the dive. The delay allows for surfacing for a short period for orientation or for a O % MIX O % MIX change of tank. max. depth max. depth deco info deco info During the five minutes waiting time the percentage of oxygen display alternates with maximum depth display. When the dive is closed after 5 minutes in wait-mode, it is entered into the logbook and Aladin Pro Nitrox switches into surface-mode.

depth depth dive time dive time
In surface-mode, Aladin Pro Nitrox shows desaturation time, no fly time and <CNS O2LIMIT>). If the tank is changed in this phase, you must make sure that the mixture is exactly the same as the one previously used. If you want to dive with another mixture, you must wait at the surface for 5 minutes to allow the Aladin Pro Nitrox to close the dive. Then the setting of the mixture must be adjusted to the new mixture. Disregarding this rule causes the Aladin Pro Nitrox to calculate with wrong mixture data. This can lead to injury or death.

5.2 Desaturation time

When DESATURATION appears, the Aladin Pro Nitrox is in surface-mode. Desaturation time in hours and minutes, the set mixture (percentage of oxygen) and, if available, oxygen toxicity is displayed next to it. Desaturation time is continually indicated until the next dive or until it reaches zero. The display is switched off to save energy three minutes after the last manipulation is made (surface-sleep-mode).
In some cases, desaturation times with the Aladin Pro Nitrox are considerably longer than those of its predecessors. This is because the calculation model assumes reduced physical activity at the surface (therefore less nitrogen off gassing) and uses longer half-times. If desaturation time reaches zero, the tissue models of the Aladin Pro Nitrox are desaturated and it switches into the sleep-mode. Desaturation time is determined either by oxygen or nitrogen saturation, depending on which gas requires the longer desaturation time. Oxygen saturation (<CNS O2LIMIT>) is displayed and adjusted until the value becomes 0%.

5.3 No fly time

The waiting period until the next flight is indicated as follows: DO NOT FLY. Beside this the time in hours that should pass before a flight is displayed. In some cases the no fly time is considerably longer than with previous models (because of recalibrated desaturation time).
Flying while the Aladin Pro Nitrox displays death from decompression sickness.
may lead to serious injury or

5.4 Warning of bubbles

Through repetitive dives microbubbles accumulate in the lungs if the surface interval is not long enough. Ignoring decompression stops or an excessive ascent rate can also lead to bubbles in tissues. In order to reduce the risk of decompression sickness for future repetitive dives, the surface interval should be planned long enough to reduce the risk of decompression sickness. If Aladin Pro Nitrox calculates that the formation of microbubbles occur during the surface interval, it will advise a diver to extend the surface interval. If the display <Atn> (=attention) is visible instead of the depth during the surface interval (surface-mode), the diver should not undertake another dive. Through the extension of the interval the diver may prevent a high concentration of bubbles in the lungs during the planned dive and avoid a higher risk situation. If the dive has to be made during <Atn>-time, the <Atn> time of the following dive can increase considerably. If the dive is made in spite of the display <Atn>, the diver must cope with a clearly shorter no-stop time and an extension of decompression.

Aladin Pro Nitrox measures the atmospheric pressure even while in sleep-mode. If the computer detects a higher altitude, it switches into surface-mode automatically. Desaturation time indicated at this moment refers to adaptation time at this altitude. If diving starts within this adaptation time, Aladin Pro Nitrox treats it as a repetitive dive, since the body still has a higher saturation.
The entire altitude range is divided into four sections which are influenced by barometric pressure. That is why the defined altitude sections overlap on their fringes. The altitude section is indicated at the surface, in the logbook and in the dive planner by stylised mountains, if a mountain lake altitude is reached. Sea level to an altitude of approximately 1000 metres is not indicated. In the following, you can see the approximate altitude ranges of the four sections:
4000 m 3000 m switching at approx. 610 mbar switching at approx. 725 mbar switching at approx. 815 mbar switching at approx. 905 mbar

2000 m

1000 m
In order to assure optimal decompression even at higher altitudes, the 3 m decompression stage is divided into a 4 m stage and a 2 m stage (the pescribed decompression depths are, in sequence, 2 m, 4 m, 6 m, 9 m). Aladin Pro Nitrox can be used as a decompression computer in case of an depth dive time emergency up to an altitude of 4000 m. If atmospheric pressure is below 620 mbar (altitude higher than 4000 m above sea level), no decompression information is displayed. Dive-plan-mode can no longer be started, since no decompression information is available. Beside the display of the altitude section 3, <HI> (=high) appears, telling the diver that he will not get any decompression information for max. depth deco info the dive. Oxygen-toxicity is still calculated. Very small differences in the pressure sensors can cause an indication of different altitude sections of two dive computers at the same altitude on the fringes of the altitude ranges. These differences are not meaningful and do not interfere with the functions of Aladin Pro Nitrox. But if an altitude section is displayed at sea level or the altitude readouts of two computers differ by more than one altitude section (e.g. section 2 instead of 0), there may be a computer defect. In this case, send your computer back to your retailer for testing. Diving while at altitude can considerably increase the risk of decompression sickness. Do not undertake high altitude diving without being specifically trained in the special techniques of such diving.

Situation: Reaction of computer:
The diver ascends too rapidly: The model calculates the formation of bubbles due to the excessively rapid ascent. The no-stop time is shor tened or a longer (and eventually at gr eater depth) decompr ession pr escription is displayed in or der to assur e incr eased decompr ession.
Recommended response of the diver During the dive: Obser ve the new decompr ession pr escription shown by Aladin After the dive:

Pro Nitr ox.

Watch for symptoms of ar terial gas embolism and decompr ession sickness. Seek immediate medical attention at a r ecompr ession chamber should any signs or symptoms of decompr ession sickness appear. Befor e the next dive, plan a suf ficiently long inter val (display <Atn> should have disappear ed).
An exessive ascent rate can lead to serious injur y or death fr om decompr ession sickness. Failur e to seek IMMEDIA TE tr eatment for any signs or symptoms of decompr ession sickness after a dive may r esult in serious injur y or death.
The diver disregards the prescribed decompression depth. The model calculates the for mation of bubbles due to ignoring decompr ession. A longer (and eventually at gr eater depth) decompr ession is displayed in or der to assur e suf ficient time for desaturation.
Recommended response of the diver During the dive: Descend to the pr escribed decompr ession depth at once. Do not descend to gr eater depths during the dive. Obser ve the decompr ession pr escribed by Aladin Pro Nitr ox. After the dive: Watch out for symptoms of ar terial gas embolism and decompr ession sickness. Befor e the next dive, plan a suf ficiently long inter val (display <Atn> should have disappear ed). Failur e to comply with all decompr ession infor mation on the Aladin Pro Nitr ox may r esult in serious injur y or death due to decompr ession sickness. Ther e is a risk of decompr ession sickness on ever y dive even if all pr ecautions described in this manual ar e taken.

Situation:

It is very unlikely to have a surface interval long enough to clear the <Atn> prior to the next dive during an organized dive trip from a boat. This previous buildup of nitrogen must be taken into consideration for the next dive. Aladin Pro Nitr ox calculates a shor ter no-stop time or decompr to r educe the risk of decompr ession sickness. ession pr escription

Reaction of computer:

Recommended response of the diver During the dive: Dive conser vatively on all r epetitive dives. Limit your maximum depth to no mor than 25 metr es at the ver y beginning of the dive, do not allow the RBT to go below thr ee minutes, and make a ver y slow ascent. After the dive: Befor e the next dive, plan a suf disappear). ficiently long sur face inter val (<Atn> display should

4 Leaving the Logbook-Mode
Touch contacts B and E. Aladin Pro Nitrox switches back into ready- or surfacemode. This also happens 3 minutes after activating logbook-mode.

5 Output on PC

With the optional DataTrak interface and software information on the last 37 dives can be read out. The dive profiles of the last dives, up to a total of 200 minutes, can be reproduced. Time and date of the dive are entered automatically, based on the clock of the PC-system when the data are transferred via interface. The possibilities and the procedure of this data transfer are described in a separate manual.

h dive

VI DIVE PLANNER
1 Survey 2 Selection and Activation from Ready-Mode 3 Selection and Activation from Surface-Mode 4 Planning a No-Stop Dive 5 Planning a Decompression Dive 6 Planning a Nitrox-dive _____________________________________ 72 _____________________________________ 73 _____________________________________ 74 _____________________________________ 75 _____________________________________ 77 6.1 Calculation of maximum depth ___________ 78 6.2 Calculation of mixture for a given depth ___ 78 _____________________________________ 79
7 Leaving the Diveplan-Mode

VI Dive Planner

The Aladin Pro Nitrox is equipped with a dive planner which allows the planning of no-stop dives with freely determinable surface intervals for the portion of oxygen set at the moment. The water temperature of the most recent dive and eventual altitude sections < > are incorporated in the calculation.
Planning of Nitrox- dives
Presetting the surface interval (only during desaturation)
Planning of no-stop dives
Planning of decompression dives
If you do not alter the setting of the gas mixture (portion of oxygen) the planning will be based on the already set mixture. Planned decompression dives are not to be attempted by recreational scuba divers. Only divers with extensive experience, training and the appropriate equipment for decompression diving should attempt to plan a decompression dive!
2 Selection and Activation from Ready-Mode
1. From ready-mode, you switch into the diveplan input stage by twice bridging contacts B and. 2. The display shows <DIVEPLAN>. You return to ready-mode by B and + twice.
3. Contacts B and E afterwards activate the planning mode.
4. The display shows no-stop times for increasing depths (scrolling no-stop times, see page 75, planning of a no-stop dive).
3 Selection and Activation from Surface-Mode
1. From surface-mode, you switch into the diveplan input stage by twice bridging B and. 2. The display shows <DIVEPLAN>. You return to surface mode by B and +.
3. After confirming by B and E, the display shows <Add>, <Int> and the interval (flashing). Aladin Pro Nitrox expects your input for the duration of the dive interval.

max. depth max. depth deco info
4a.If no surface interval is to be entered, (diving at the present moment), confirm this with contacts B and E, and you switch into no-stop planning (page 75).
4b. You can extend the interval with contacts B and +. B and shorten the interval.
5. You confirm the new surface interval and get into nostop planning (page 75).
4 Planning a No-Stop Dive
After confirming the surface interval (if possible), no-stop times are displayed in 3 metre-increments. The process starts with 9 metres. The no-stop time for every 3 metre-increment is displayed for about 3 seconds (scrolling no-stop times).
No-stop times are displayed to the depth at which the partial pressure of oxygen (ppO2) has not yet reached the set maximum value.
Repetitive dives usually cause more microbubbles in the lungs than on first dives if the surface interval is not long enough. Too rapid an ascent and/or disregarding decompression instructions can lead to microbubbles. By calculating the formation of bubbles, Aladin Pro Nitrox is able to advise the diver to extend the surface interval if necessary. If <Atn> is displayed instead of the depth in addition to the no-stop times, the diver should plan an extension of the interval if possible.
By repeatedly recalling of the diveplan with varying surface intervals the minimum interval can be determined.
Diving with the display <Atn>, a clear shortening of the no-stop time and/or an extension of decompression has to be expected. If a dive is made during <Atn>-time, the <Atn>-time following the dive can increase considerably.
Making a repetitive dive when <Atn> is displayed will increased your risk of serious injury or death from decompression sickness!
5 Planning a Decompression Dive
1. In order to plan a dive that requires decompression, wait until the scrolling nostop time shows the desired depth. 2. By means of contacts B and E you can switch into decompression planning. Dive time is now one minute longer than no-stop time, and the decompression information appears. 3. <Add> demands that you set the time. This is done with contacts B and +, B and respectively. As soon as the contacts are no longer bridged, Aladin Pro Nitrox calculates the decompression information for this set time. This calculation takes some time. If you wish to plan a dive requiring decompression at another depth, switch from decompression planning to no-stop planning by means of B and E. Aladin Pro Nitrox again shows the scrolling no-stop times. Now you can switch between no-stop planning and decompression planning at will with contacts B and E.

Leaving the Logbook-Mode ____________63 Output on PC ________________________3 Technical Information _________________81 Warranty ___________________________82 3.1 Ecognition of warranty _____________82 3.2 Scope of the warranty______________82 3.3 Warranty period and claim __________82 Safety considerations __________________83 Serial No. / Dealer address ______________84
VI Dive Planner ________________________Survey _______________________________Selection and Activation from Ready-Mode__________________________Selection and Activation from Surface-Mode ________________________Planning a No-Stop Dive _______________Planning a Decompression Dive _________Planning a Nitrox-dive__________________72 6.1 Calculation of maximum depth ______72 6.2 Calculation of mixture for a given depth __________________________Leaving the Diveplan-Mode _____________74 VII Communication Software for Windows _______________________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 VIII Trouble Shooting ____________________Trouble Shooting ______________________78 IX Appendix ___________________________Maintenance of Aladin Pro Ultra________80

Introduction

5 Aladin Pro Ultra Introduction Aladin Pro Ultra More Safety in Diving Safety Considerations Aladin Pro Ultra Your Personal Companion The Calculation Model ZH-L8 ADT 5.1 5.2
________________________________________ 10 ________________________________________ 10 _____________________________________ 11, 12 ________________________________________ 13 Description _______________________________ 14 Advantages ______________________________ 15 ________________________________________ 16

Safety in Diving

I Uwatec Aladin Pro Ultra

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 requirements. Aladin Pro Ultra watches over the nitrogen and oxygen toxicity of your body without interruption. With Aladin Pro Ultra you dive more safely than ever before. In addition, Aladin Pro Ultra offers an unmatched comfort in carrying and operation. 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 compressed air is the same as the normal air of the earths 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 describes a mixture with a higher percentage of oxygen. A higher percentage of oxygen (and automatically the reduction of nitrogen) has the advantage of lengthening the no-stop phase (or reducing the decompression phase), since less nitrogen is dissolved in the divers body during the dive. The higher share of oxygen in the Nitrox-mixture also causes additional physiological problems by the toxic effects at a higher partial pressure of oxygen (ppO2). 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 symptoms are: irritations of the respiratory organs, sickness, headache, pulmonary oedema, cramps, unconsciousness. The symptoms occur at a ppO2 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 ppO2 from 0.5 bar and higher and with terms of exposure in the range of hours/days.
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 and is dependent on the ppO2. The indication of toxicity is shown as CNS O2 % (= relative toxicity of oxygen for the central nervous system). CNS O2 = 0% corresponds to the normal state before the first dive, and CNS O2 = 100% corresponds to the critical 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.

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.
Aladin Pro Ultra The System
Description Dive Computer 2.1
________________________________________ 18 Operation _______________________________ Switching on display_______________________ Switching off display ______________________ Active backlight __________________________ 19 20

2.2 2.3

Operating the surface functions ____________ 21 Operating mode __________________________ 26
II Uwatec Aladin Pro Ultra

1 Description

The Aladin Pro Ultra system consists of two units: 1 The dive computer displays the dive and decompression data. 2 The 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. 1

CNS O2 LIMIT

2 Dive Computer
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 operation, touch base contact B and any one of the other three contacts above the display with moistened fingers. - + E Contact B: Base contact, which has to be touched for all operations. Contact E: Enter contact. It serves to switch on the computer, to activate the logbook and dive-plan mode and to switch between no-stop and decompression 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, O2% mix etc.). B
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.
2.2 Operating the surface functions
On page 2 of the English manual you will find a reference guide. On page 3 of the German manual you will find an openable operating scheme. 1. Der Aladin Pro Ultra is in a state of rest; no information is displayed. -> sleep-mode or -> surface-sleep-mode

max. depth depth

DO NOT FLY DIVEPLAN LOGBOOK

deco info dive time

S L O W

DECOSTOP

ft h m
After activation the Aladin Pro Ultra switches into ready-mode. Once in readymode, the display is switched on and the set percentage of oxygen is shown. In certain circumstances altitude sections are also displayed.
By touching contacts B and E in the ready-mode once more, Aladin Pro Ultra will display the remaining battery capacity in percent. Three minutes after activating the ready-mode, Aladin Pro Ultra will fall back into the -> sleepmode.
Dive-mode: Activation: automatically at depth of about 0.5 m. In dive-mode, all diving functions are monitored, i.e. depth and dive time are displayed, maximum depth is stored, saturation of tissues is calculated, no-stop time or decompression prognosis is determined, ascent rate is controlled and displayed and the correctness of the decompression procedure is supervised. The set percentage of oxygen is displayed at the beginning of a dive until maximum depth is reached, but at least for the first 5 minutes of the dive.

dive time dive time

max. depth max. depth deco info deco info
Wait-mode: Activation: automatically on reaching the surface The wait-mode is activated if the the diver surfaces (diving depth less than 0.5 m). At the surface, the dive is not completed and entered into the logbook for an interval of 5 minutes. This allows the short surfacing for orientation or tank exchange. During the 5 minutes waiting time, the set percentage of oxygen is displayed alternatively with the maximum depth.
Surface-mode: Activation: automatically after a dive or when changing altitude. After a dive has been completed, Aladin Pro Ultra is in surface-mode. All data belonging to the surface interval are calculated and displayed: simulation of microbubble formation, actualization of oxygen toxicity and nitrogen saturation of the tissues depending on the calculated skin temperature and the assumed work load at the surface, calculation of desaturation time, and no fly interval. Desaturation time is determined either by oxygen- or nitrogen saturation, depending on the gas requiring the longer time. Oxygen saturation <CNS O2 %> is displayed and adjusted until the value becomes 0%. In order to save energy, Aladin Pro Ultra falls into the surface-sleep after 3 minutes. The functions of surface-mode are then carried out in the background. The atmospheric pressure is measured in surface-sleep once every minute. If the atmospheric pressure decreases, for example in case of change of altitude, Aladin Pro Ultra switches from sleep-mode or from surface-sleep into surface-mode automatically and displays the adaptation time. The adaptation time is the time after which all body tissues have adapted to the ambient pressure (= desaturation time). Logbook-mode: Activation: manually by contacts Data of 19 past dives can be called up in the logbook-mode. It shows maximum depth, dive time, preceding interval*, altitude sections and, where appropriate, alarms. A dive is entered in the logbook if it has lasted more than 2 minutes. When the dive was a repetitive dive then it also shows the interval which has passed since the last dive or a preceding change of altitude. The last 37 dives and the last 200 minutes of dive-profiles can be downloaded out into a MemoMouse and later from there into a personal computer (Windows). * Preceding interval is only shown when the computer calculated that there was a residual nitrogen uptake at the beginning of the logged dive.

DO NOT FLY LOGBOOK

O2-Mix-mode: The O2-Mix-mode serves to select the percentage of oxygen in the nitrox gasmixture. The percentage of oxygen can be set from 21% to 50%.
Before every dive, make sure that the setting of the gas mixture corresponds to the actual mixture used.
Diveplan-mode: Activation: manually by contacts The diveplan-mode serves the planning of a future dive. It allows the planning of no-stop dives and decompression dives with determinable depth, dive time and composition of the gas mixture. On repetitive dives, the surface interval can also be chosen. Calculations are based on the temperature data of the last dive, assuming normal workload and on the set gas mixture.
SOS-mode: Activation: Activation: automatically If the diver remains above a depth of 0.5 metres for more than three minutes without observing the prescribed decompression, the computer switches into SOS-mode after the dive and displays <SOS> instead of the depth. The computer is locked from use for the next 24 hours. Desaturation is still calculated including microbubbles in the tissues. Diving is again possible after 24 hours, but the SOS-mode can influence the calculations of Aladin Pro Ultra for three days after the incident due to the possible presence of microbubbles. If a diver using Aladin Pro Ultra experiences a diving accident resulting in decompression sickness, the dive can be analyzed by means of the MemoMouse and DataTrak-software. An automatic program transmits the logbook data after connecting the dive computer via MemoMouse with a PC once a minute from the locked dive computer to the personal computer. Dive computer, MemoMouse and PC need to be connected. The PC has to be ready for receiving data and the DataTrak download-procedure has to be activated. Serious injury or death may result if a diver does not seek immediate treatment at a recompression chamber should any signs or symptoms of decompression sickness occur after a dive.
III Diving with Aladin Pro Ultra
1 Terminology/Symbols 1.1 1.2 1.3 2.1 2.2 2.3 3.1 3.2 4.1 4.2 4.3 4.4 4.5 4.6 4.7 5.1 5.2 5.3 5.4
Display during no-stop phase________________ 32 Display during decompression phase _________ 33 Nitrox information _________________________ 34 Attention messages________________________ 35 Alarms___________________________________ 37 Alarm low battery _________________________ 38 Switching on _____________________________ 39 Setting gas mixture ________________________ 40 Dive time ________________________________ Current depth ____________________________ Maximum depth __________________________ Ascent rate _______________________________ Partial pressure of oxygen___________________ Oxygen toxicity ___________________________ Decompression information _________________ End of a dive _____________________________ Desaturation time _________________________ No fly time _______________________________ Warning of bubbles________________________ 50

CNS O22LIMIT CNS O LIMIT

When oxygen toxicity reaches 100%, an acoustic alarm is sent every 4 seconds. <CNS O2 LIMIT> and the percentage value flashes continuously. See also page 58. Start ascent at once.
During an ascent and if the CNS O2 % value does not increase anymore (due to a lower partial pressure of oxygen), the acoustic warning is suppressed. During the ascent, the display of the oxygen toxicity is replaced by the ascent rate display. If the ascent is stopped, the display changes back to the indication of oxygen toxicity.
4.7 Decompression information No-stop time is displayed if no decompression stops are necessary. The arrow <NO STOP> is visible if no decompression stops are necessary. The figures indicate no-stop time in minutes.
No-stop display <99:> means remaining time of 99 minutes or more. No-stop time is calculated assuming normal workload and current water temperature. Messages: There is an acoustic signal if no-stop time is less than 1 minute. In this last minute, the no-stop display shows the flashing value <0>.
In order to prevent a decompression dive, you must ascend a few meters after this message. It is dangerous and an unsafe diving practice to "push" the Aladin Pro Ultra or any other decompression tool to its limits. Avoid no-stop times of less than three minutes at any given depth.

Decompression values

On entering the decompression phase, the arrow NO STOP disappears. The arrow DECOSTOP.appears. Right beside the arrow, the deepest decompression stage in metres is displayed. Beside the decompression depth, the decompression time is displayed in minutes for this stage. The display <3m5:> means that a decompression stop of 5 minutes at a depth of 3 metres has to be made. When a decompression stop has been finished, the next higher decompression stop is displayed. When all decompression stops have been made, the arrow DECOSTOP extinguishes and the arrow NO STOP reappears. The indication of time on the lower right shows the no-stop time again.
The decompression alarm is activated if the decompression stop is ignored. The arrow DECOSTOP begins flashing and an acoustic alarm is initiated. Due to the formation of microbubbles decompression can increase massively if a decompression stop is ignored. When the surface is reached during the decompression alarm, the arrow DECOSTOP continues flashing, in order to point to the risk of a decompression accident. The SOS-mode is activated 3 minutes after the dive if corrective action is not taken. If the total (cumulative) duration of the decompression alarm is longer than a minute, it is entered in the logbook. Descend to the prescribed decompression depth immediately!

The waiting period until the next flight is indicated as follows: DO NOT FLY Beside this the time in hours that should pass before a flight is displayed.
In some cases the no fly time is considerably longer than with previous models (because of recalibrated desaturation time).
Flying while the Aladin Pro Ultra displays injury or death from decompression sickness.

may lead to serious

For the calculations of the desaturation and No Fly Time it is assumed that the diver inhales air.
If desaturation time reaches zero, the tissue models of the Aladin Pro Ultra are desaturated and it switches into the sleep-mode. Desaturation time is determined either by oxygen or nitrogen saturation, depending on which gas requires the longer desaturation time. Oxygen saturation (<CNS O2 LIMIT>) is displayed and adjusted until the value becomes 0%.
5.4 Warning of bubbles Through repetitive dives microbubbles accumulate in the lungs if the surface interval is not long enough. Ignoring decompression stops or an excessive depth dive time ascent rate can also lead to bubbles in tissues. In order to reduce the risk of h decompression sickness for future repetitive dives, the surface interval should be planned long enough to reduce the risk of decompression sickness. If % O % MIX Aladin Pro Ultra calculates that the formation of microbubbles occur during h the surface interval, it will advise a diver to extend the surface interval. If the max. depth deco info display <Atn> (=attention) is visible instead of the depth during the surface interval (surface-mode), the diver should not undertake another dive. Through the extension of the interval the diver may prevent a high concentration of bubbles in the lungs during the planned dive and avoid a higher risk situation. See also page 70.
If the dive has to be made during <Atn>-time, the <Atn> time of the following dive can increase considerably. If the dive is made in spite of the display <Atn>, the diver must cope with a clearly shorter no-stop time and an extension of decompression.
6 Diving in Mountain Lakes
Aladin Pro Ultra measures the atmospheric pressure even while in sleep-mode. If the computer detects a higher altitude, it switches into surface-mode automatically. Desaturation time indicated at this moment refers to adaptation time at this altitude. If diving starts within this adaptation time, Aladin Pro Ultra treats it as a repetitive dive, since the body still has a higher saturation. The entire altitude range is divided into four sections which are influenced by barometric pressure. That is why the defined altitude sections overlap on their fringes. The altitude section is indicated at the surface, in the logbook and in the dive planner by stylised mountains, if a mountain lake altitude is reached. Sea level to an altitude of approximately 1000 metres is not indicated. In the following, you can see the approximate altitude ranges of the four sections:

4000 m 3000 m

switching at approx. 610 mbar switching at approx. 725 mbar switching at approx. 815 mbar switching at approx. 905 mbar

2000 m

1000 m
In order to assure optimal decompression even at higher altitudes, the 3 m decompression stage is divided into a 4 m stage and a 2 m stage (the pescribed decompression depths are, in sequence, 2 m, 4 m, 6 m, 9 m). Aladin Pro Ultra can be used as a decompression computer in case of an depth dive time emergency up to an altitude of 4000 m. If atmospheric pressure is below 620 mbar (altitude higher than 4000 m above sea level), no decompression information is displayed. Dive-plan-mode can no longer be started, since no decompression information is available. Beside the display of the altitude section 3, <HI> (=high) appears, telling the diver that he will not get any decompression max. depth deco info information for the dive. Oxygen-toxicity is still calculated. Very small differences in the pressure sensors can cause an indication of different altitude sections of two dive computers at the same altitude on the fringes of the altitude ranges. These differences are not meaningful and do not interfere with the functions of Aladin Pro Ultra. But if an altitude section is displayed at sea level or the altitude readouts of two computers differ by more than one altitude section (e.g. section 2 instead of 0), there may be a computer defect. In this case, send your computer back to your retailer for testing.
Diving while at altitude can considerably increase the risk of decompression sickness. Do not undertake high altitude diving without being specifically trained in the special techniques of such diving.
IV Diving at Reduced Risk with Aladin Pro Ultra
1 Diving at Reduced Risk with Aladin Pro Ultra 1.1 1.2 1.3 1.4
Diving at reduced risk ______________________ 54 Diving at reduced risk for the first dive ________54 Minimizing risk on repetitive dives ___________ 55 Response in increased risk situations ______ 5658
IV Uwatec Aladin Pro Ultra
1 Diving at Reduced Risk with Aladin Pro Ultra
1.1 Diving at reduced risk Aladin Pro Ultra recognizes and reacts intelligently to certain risk situations, although of course it is much better that each individual diver avoid these higher risk situations altogether. If a decompression accident does occur, the optional MemoMouse and DataTrak software allows the analysis of the dive profile and certain risk parameters to provide for more complete information for treatment purposes. Analysis of the most recent results of decompression research and statistical analysis of diving accidents involving decompression sickness supports the following guidelines for diving with a reduced risk of decompression sickness. The following suggestions are highly recommended: 1.2 Diving at reduced risk for the first dive Neither the Aladin Pro Ultra nor any other diving computer or decompression table can guarantee that decompression sickness will not occur even if the computer or table is used correctly and all of the following precautions are followed. Always make your first dive the deepest dive of the day. Always make the deepest descent of each given dive on a particular day at the beginning of that dive. Avoid repeated ascents and descents (yo-yo diving). Avoid repeated heavy workload whilst at depth. Plan the dives shorter if they are made in cold water. After finishing the decompression or at the end of a no-stop dive, the final stage of the ascent should be as slow as possible. On all dives with the Aladin Pro Ultra, make a safety stop for at least one to three minutes within the 3 to 5 metre zone. Check <O2% MIX> (gas mixture) and the dive depth limit given by the maximum ppO2 selected. Observe <CNS O2 %> (ascend at 75%). Comply with the ascent rate and carry out any decompression stop required. If the Aladin Pro Ultra fails at any time during the dive, the dive must be terminated, and appropriate surfacing procedures should be initiated immediately.

You MUST follow the ascent rates as indicated by the Aladin Pro Ultra and if the computer should fail for any reason, you must ascend at a rate of no greater than 10 metres per minute. All divers using dive computers to indicate or determine decompression status must use their own diving computer. On any given dive, both divers in a buddy pair must follow the most conservative dive computer for that particular dive. 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 symptoms 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 visual and acoustic alarm signals of the Aladin Pro Ultra. Avoid situations of increased risk which are marked with a warning sign in this operating manual. 1.3 Minimizing risk on repetitive dives With consecutive repetitive dives, there will be excess nitrogen in the body due to the accumulation of nitrogen on the preceding dives. Depending on the length of the surface interval, there could even be gaseous nitrogen (microbubbles) in your body. This accumulation of both absorbed as well as gaseous nitrogen in the body can greatly increase the risk of decompression sickness on subsequent dives. That risk can be minimized. Wait until <CNS O2 LIMIT> is less then 40%. Match gas mixture to the intended dive. Respect the rules for the first dives. Descend less deep for the repetitive dive than for the previous dive. Plan for a minimum surface interval of three to four hours. Do not attempt to repetitive dive if the <Atn> is visible on the display. Take a day off from diving every week. Repetitive dives after exchanging the dive computer: Wait at least 24 hour before you start with the repetitive dive.
1.4 Response in increased risk situations If the dive includes an increased risk situation, Aladin Pro Ultra reacts automatically to warn the diver of this risk and increase required decompression, as the case may be. A change of decompression may be indicated to minimize the risk. The diver can further reduce the risk by following conservative diving practices on the next dive and at the same time avoiding long decompression stops. A few examples are on the following pages:
Situation 1: Reaction of computer:
The diver ascends too rapidly: The model calculates the formation of bubbles due to the excessively rapid ascent. The no-stop time is shortened or a longer (and eventually at greater depth) decompression prescription is displayed in order to assure increased decompression. See pages 37, 42 and 43.

Recommended response of the diver: During the dive: Observe the new decompression prescription shown by Aladin Pro Ultra. After the dive: Watch for symptoms of arterial gas embolism and decompression sickness. Seek immediate medical attention at a recompression chamber should any signs or symptoms of decompression sickness appear. Before the next dive, plan a sufficiently long interval (display <Atn> should have disappeared). An exessive ascent rate can lead to serious injury or death from decompression sickness. Failure to seek IMMEDIATE treatment for any signs or symptoms of decompression sickness after a dive may result in serious injury or death.
Situation 2: Reaction of computer: The diver disregards the prescribed decompression depth.
The model calculates the formation of bubbles due to ignoring decompression. A longer (and eventually at greater depth) decompression is displayed in order to assure sufficient time for desaturation. See page 37, 47. Recommended response of the diver: During the dive: Descend to the prescribed decompression depth at once. Do not descend to greater depths during the dive. Observe the decompression prescribed by Aladin Pro Ultra. After the dive: Watch out for symptoms of arterial gas embolism and decompression sickness. Before the next dive, plan a sufficiently long interval (display <Atn> should have disappeared). Failure to comply with all decompression information on the Aladin Pro Ultra may result in serious injury or death due to decompression sickness. There is a risk of decompression sickness on every dive even if all precautions described in this manual are taken.

Situation 3:

Reaction of computer:
It is very unlikely to have a surface interval long enough to clear the <Atn> prior to the next dive during an organized dive trip from a boat. This previous buildup of nitrogen must be taken into consideration for the next dive. Aladin Pro Ultra calculates a shorter no-stop time or decompression prescription to reduce the risk of decompression sickness. See page 36 and 50.
Recommended response of the diver: During the dive: Dive conservatively on all repetitive dives. Limit your maximum depth to no more than 25 metres at the very beginning of the dive, and make a very slow ascent. After the dive: Before the next dive, plan a sufficiently long surface interval (<Atn> display should disappear).

Situation 4: Reaction of computer: <CNS O2%-value> reaches 100%. An acoustic and visual alarm is given. See also page 37, 45.
Recommended response of the diver: During the dive: Ascend immediately until ppO2 is less then 0.5 bar and the buzzer stops.
Situation 5: Reaction of computer:
ppO2 reaches the set value. An acoustic warning is given, depth indication is flashing (attention message). See page 36, 44.
Recommended response of the diver: During the dive: Ascend above critical depth limit. Observe <CNS O2%-value> carefully.

V Logbook

5 Survey Selection and Activation Selection of Dive Leaving the Logbook-Mode Output on PC
_________________________________________60 _________________________________________61 _________________________________________62 _________________________________________63 _________________________________________64
V Uwatec Aladin Pro Ultra

1 Survey

The Aladin Pro Ultra records the last 37 dives and the dive profiles of the last 200 minutes of diving (see Output on PC page 64). The last 19 dives can be displayed directly on the dive computer. A dive is only entered in the logbook if the dive time is longer than 2 minutes. Displayed information of the dive:

alarms during the dive

altitude sections if any

dive number

maximum depth
duration of surface interval (only with repetitive dives)
If a dive is started within adaptation time (after a change of altitude), the adaptation time is displayed instead of the surface interval.
2 Selection and Activation
1.The logbook is selected by bridging contacts B and + in ready- or surface-mode. Indication LOGBOOK appears. If Aladin Pro Ultra has been in surfacemode before, the surface interval appears as well. You go back into ready- or surface-mode by B and.
2.In order to activate the logbook, bridge contacts B and E. The most recent dive is displayed.

3 Selection of Dive

1.Bridge contacts B and + to get the information of the dive preceding the most recent one. Display <DIVE 2> appears.
2.On additional bridging of B and + the logbook jumps to the next older dive (DIVE 3).
3.On constant bridging of the contacts all dives are displayed successively.

Safety considerations Serial No. / Dealer address
IX Uwatec Aladin Pro Ultra
1 Maintenance of Aladin Pro Ultra Dive Computer
Your Aladin Pro Ultra is virtually maintenance free. All you need to do is to rinse it carefully with fresh water after each use and to have the batteries changed when needed. To avoid possible problems with your Aladin Pro Ultra, the following recommendations will help assure that it will give you years of trouble free service: Avoid dropping or jarring your Aladin Pro Ultra. Do not allow your Aladin Pro Ultra to be exposed to direct, intense sunlight. Rinse your Aladin Pro Ultra thoroughly with fresh water after each dive. Do not store your Aladin Pro Ultra in an gas mixture-tight area; make sure there is free ventilation. If there are problems with operating the contacts, the surface of your Aladin Pro Ultra housing can be treated with silicone grease. Use soapy water to clean the Aladin Pro Ultra before using silicone grease and dry it thoroughly. There are borings in two of the contacts for the reception of the PC interface connection (MemoMouse). Free these borings from dirt with a needle if necessary.
Take the dive computer to an authorized Uwatec dealer in order to change the batteries. The actual change of the batteries is made at the manufacturer or the importer. The computer is checked for its technical functioning at the same time. Do not attempt to have the batteries changed by anyone other than an authorized dealer.

2 Technical Information

Operating altitude: with decompression information: without decompression information: Operating depth: No limit for recreational dives. sea level up to approx. 4000 metres unlimited
Always check the diving limits given by the chosen percentage of oxygen (decompression sickness, oxygen toxicity). Do not dive deeper than 40 metres. Maximum operating pressure: 13 bar Clock: quartz timer, display up to 199 minutes
Operating temperature: -10 to +50C. Power supply: Life of the battery: Special battery Uwatec LR07 (standard values) For an average diving time of 60 minutes and a surface interval of 20 hours after every dive Number of dives per year dive computer (years) 6 4

3 Warranty

Please pay attention to the following remarks on warranty claims: 3.1 Recognition of warranty: 3.2 Scope of the warranty: The warranty only covers dive computers which have been provably bought from an authorized retailer or from the manufacturer. The manufacturer will repair all defects which are provably traceable to defects of material or faults in production. The warranty covers the repair of the dive computer free of charge, the replacement of faulty parts or the entire dive computer, respectively. UWATEC reserves the right to determine the merits of a warranty claim and to determine whether the computer will be repaired or replaced. Excluded are faults or defects due to: excessive wear and tear exterior influences, e.g. transport damage, damage due to bumping and hitting, influences of weather or other natural phenomena servicing, repairs or the opening of the dive computer by anybody not authorized by the manufacturer. This especially concerns the change of batteries for the dive computer pressure tests which do not take place in water diving accidents 3.3 Warranty period and claim The warranty is given for a period of 12 months. Repairs or replacements during the warranty period do not increase the warranty period. In order to put forward a warranty claim, send the dive computer together with a dated receipt of the purchase to your authorized retailer or an authorized servicing point. The manufacturer does not have to accept extensions of the warranty granted by national importers.

4 Safety considerations

The Aladin Pro Ultra gives to the diver a high level of reassurance and safety. However these units can never be a substitute for a thorough diving education. Pay careful attention to warnings given by the Aladin Pro Ultra. Do not make risky dives. Pay special attention to the parts of this manual which are marked with and. Follow all standard safe diving practices: Never dive without a buddy. The Aladin Pro Ultra does not substitute for a dive buddy! Only make dives that are appropriate to your level of dive training. The Aladin Pro Ultra does not increase your knowledge of diving. Always check the diving limits given by the chosen percentage of oxygen (decompression sickness, oxygen toxicity). Do not dive deeper than 40 metres. This manual is part of the Aladin Pro Ultra safety concept. Please confirm that you have read and understood the complete manual:
Place: ________________ Date: ______________
Signature: ____________________
5 Serial No. / Dealer address
Serial No. of your Aladin Pro Ultra:
Printed in Switzerland 1/00

Dealer address:

(Dealer to affix stamp)