User manual SCUBAPRO-UWATEC SMART Z

Smart Z ® SWISS MADE BY UWATEC AG Français English Operating Manual Deutsch Safety considerations You must carefully read and understand this entire manual before using your new computer. 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 injured or die from decompression sickness, oxygen toxicity or some other inherent risk of scuba with 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 computer! WARNING Guidelines for the use of your UWATEC dive computer: The following guidelines 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 decompression sickness or oxygen toxicity will not occur. · This computer is designed for dives with Nitrox (to a max.100% O2) and compressed air (21%O2) only. Do not use the computer 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 currently used. Always remember: setting an incorrect mixture carries an inherent risk of decompression sickness and/or oxygen toxicity! Maximum deviation from the measured mixture must not exceed 1% O2. An incorrect gas mixture can be lethal! · Only use this computer with open circuit breathing systems. The computer must be set for a determined gas mixture. · Only use this computer for diving with an independent breathing apparatus. The computer is not designed for long term exposures with Nitrox. · Always observe the visual and audible alarm signals of the computer. Avoid situations of increased risk which are marked with a warning sign in this operating manual. · If the ascent arrow appears, start to ascend. · If the flashing ascent arrow appears, start to ascend immediately. · This computer has a ppO2 warning, the default limits of which are set at 1.4 bar ppO2max. This limit can be adjusted via SmartTRAK. An alteration of the ppO2max to higher than 1.6 bar is dangerous and we do not recommend this. · Frequently check the "oxygen clock" (CNS O2), especially in the range higher than 1.4 bar ppO2. Ascend and finish the dive if the CNS O2 exceeds 75%. · Never dive deeper than the Maximum Operating Depth (MOD) pertinent to the gas mixture in use. · Always check the diving limits considering the oxygen content and standard sports diving procedures (decompression sickness, oxygen toxicity). · In accordance with the recommended maximum diving limit of all instructional agencies, do not dive deeper than 40 metres/130 feet. · The danger of nitrogen narcosis has to be taken into consideration. The computer gives no warning about this. · On all dives, with or without dive computer, make a safety stop for at least 3 minutes at 5 metres (15 feet). · 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 computer 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 at 5 metres /15 ft) should be initiated immediately. · Comply with the ascent rate and carry out any decompression stop required. If the computer should fail for any reason, you must ascend at a rate of 10m (30 feet) per minute or less. · On any given dive, both divers in a buddy pair must follow the most conservative dive computer for that particular dive. · Never dive without a buddy. Smart Z does not substitute for a dive buddy. · Only make dives that are appropriate to your level of dive training. A dive computer does not increase your knowledge of diving. 2 UWATEC® Smart dive computers Safety considerations I · Always dive with back-up instruments. Make sure that you always use back-up instrumentation including a depth gauge, submersible pressure gauge, digital bottom timer or dive watch, and have access to decompression tables whenever diving with a dive computer. · Avoid repeated ascents and descents (yo yo diving). · Avoid repeated heavy workload while at depth. · Plan the dives to be 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. · You MUST be familiar with all signs and symptoms of decompression sickness before using this computer! 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. · Only dive with Nitrox after you have been thoroughly instructed by a recognised institution. Repetitive dives · Do not start your next dive before your CNS O2% status has dropped below 40%. · Diving with Nitrox: Make sure your surface interval is long enough (just like diving with compressed air). Plan for a minimum surface interval of two hours. Oxygen, too, needs sufficient time to leave the body. · Match gas mixture to the intended dive. is visible on the display. · Do not attempt a repetitive dive if the microbubble warning · Plan a day without diving once a week. · If you have to change computers, wait at least 48 hours before carrying out your next dive. NO Altitude and diving · Do not dive at altitudes higher than 4000m (13000 feet). · After a dive do not rise to altitudes that the computer prohibits via the flashing altitude segments (see page 25). Flying after diving · After diving, wait at least 24 hours prior to flying. Smart Z dive instrument is a personal protective equipment in compliance with the essential safety requirements of the European Union directive 89/686/EEC. RINA SpA, Via Corsica 12, I-16128 Genoa, notified body no. 0474, have certified the conformity with the European Standard EN 250:2000 and EN 13319:2000. EN250:2000 Respiratory equipment - Open circuit self contained compressed air diving apparatus Requirements, testing, marking (pressure gauge test). EN13319:2000 Diving accessories - Depth gauges and combined depth and time measuring devices Functional and safety requirements, test methods. Any information on decompression obligation displayed by equipment covered by this standard is explicitly excluded from its scope. UWATEC® Smart dive computers 3 English Introduction Congratulations on purchasing a Smart Z dive computer and welcome to UWATEC. From now on you will enjoy the assistance of the most extraordinary dive computer - equipped with UWATEC's most innovative technology - while diving. We thank you for choosing this computer and we hope you will enjoy safe dives in the future! Further information on UWATEC Smart dive computers and other products by UWATEC can be found on our web page at www.uwatec.com. To make this manual easier to read we will use the term 'Smart Z' as an abbreviation for 'UWATEC Smart Z diving computer' throughout this booklet. Safety considerations Dive computers provide divers with data; they, however, do not provide the knowledge how this data should be understood and applied. Dive computers cannot replace common sense! You must therefore carefully read and understand this entire manual before using your Smart Z. Important remarks concerning signal words and symbols This operating manual makes use of the following icons to indicate especially important comments: Remarks Danger! Information and tips which are important for optimal use of the functions of Smart Z. WARNING 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 -> Page reference e.g. ->10 Audible signals 4 sec. Audible attention signal Audible alarm signal Instructions for manual input ­+E B April 2005, Copyright© by UWATEC Switzerland Bridge contacts Example: bridging contacts B and E 4 UWATEC® Smart dive computers Quick reference O2 mix icon (input) Microbubble level icon (input / MB level reduced) Logbook icon Dive planner icon I Temperature Do not fly icon Do not dive icon Microbubble warning NO Current depth Dive time / No-fly time / SOS duration Service icon Logbook indicator Total ascent time / Dive number Ascent time icon Desaturation time indicator No-stop time / Decompression duration / MB no-stop time Level stop duration / Duration of Microbubble Warning Desaturation duration / Duration of surface interval Increased workload warning Remaining bottom time RBT Tank pressure warning NO Gauge icon Altitude sections Too fast ascent Ascent obligation CNS O2% Maximum depth Microbubble level Maximum Operating Depth (MOD) O2 mix DECO STOP LEVELSTOP NO STOP % Transmitter warning Decompression stop obligation Ignored decompression stop Tank pressure / Gas consumed Partial pressure of oxygen ppO2 Level stop indicator No-stop indicator Decompression stop indicator Decompression depth / Level stop depth Oxygen toxicity CNS O2% Ascent rate Battery capacity Operating scheme Start / Confirmation / Enter + / Navigate ­ / Navigate Display switched off Switching on Dive planner Logbook O2 mix Microbubble level Gauge mode Navigation ( % + Surface ­ interval ) % % CNS O2% % CNS O2% Battery capacity + Percentage ­ of oxygen NO STOP % + ­ Microbubble level + ­ Gauge mode on and off + Bottom time ­ Exit (2 sec.) + Dive number ­ + Maximum operating ­ depth (MOD) Confirmation Confirmation Confirmation Exit Display switches off automatically after 3 minutes without operation. UWATEC® Smart dive computers 5 English List of chapters I Safety considerations ___________________________________ 2 Introduction ___________________________________ 4 Important remarks concerning signal words and symbols ______________________________ 4 Quick reference / Operating scheme ___________________________________ 5 List of chapters ___________________________________ 6 System and operation System description Operation 2.1 Operating elements 2.2 SmartTRAK 2.3 Switching on the display 2.4 Checking the battery capacity 2.5 Selection and activation of user functions 2.6 Active backlight 2.7 Switching off the display SOS mode Setting up Smart Z 4.1 Mounting of transmitter 4.2 Pairing of transmitter and dive computer ___________________________________ 8 ___________________________________ 8 ___________________________________ 8 ___________________________________ 8 ___________________________________ 9 __________________________________ 10 __________________________________ 10 __________________________________ 10 __________________________________ 11 __________________________________ 11 __________________________________ 11 __________________________________ 12 __________________________________ 12 __________________________________ 13 II 1 2 3 4 III Diving with Smart Z __________________________________ 15 1 Terminology / Symbols __________________________________ 15 1.1 General terminology / Display during no-stop phase __________________________________ 15 1.2 Display during decompression phase / Remaining Bottom Time __________________________________ 15 __________________________________ 16 1.3 Nitrox information (O2 information) 2 Attention messages and alarms 2.1 Attention messages 2.2 Alarms Preparation for the dive 3.1 Setting the gas mixture and MOD 3.2 Setting the MB level 3.3 Preparation for the dive and function check __________________________________ 17 __________________________________ 17 __________________________________ 17 __________________________________ 18 __________________________________ 18 __________________________________ 18 __________________________________ 18 3 4 Functions during the dive __________________________________ 19 4.1 Immersion __________________________________ 19 4.2 Dive time __________________________________ 19 4.3 Current depth __________________________________ 19 4.4 Maximum depth __________________________________ 19 4.5 Temperature __________________________________ 19 4.6 Ascent rate __________________________________ 19 4.7 Partial pressure of oxygen (ppO2) / Maximum Operating Depth (MOD) ___________________ 20 __________________________________ 21 4.8 Oxygen toxicity (CNS O2%) 4.9 Tank pressure __________________________________ 21 4.10 Remaining Bottom Time (RBT) __________________________________ 22 4.11 Decompression information __________________________________ 22 Functions at the surface 5.1 End of a dive 5.2 Desaturation time 5.3 No-fly time 5.4 Microbubble warning __________________________________ 24 __________________________________ 24 __________________________________ 24 __________________________________ 24 __________________________________ 24 5 6 UWATEC® Smart dive computers List of chapters 6 Diving in mountain lakes 6.1 Altitude ranges 6.2 Prohibited altitude 6.3 Decompression dives in mountain lakes I __________________________________ 25 __________________________________ 25 __________________________________ 25 __________________________________ 25 __________________________________ 26 __________________________________ 28 __________________________________ 28 __________________________________ 29 __________________________________ 29 __________________________________ 29 English IV Gauge mode V 1 2 Diving with microbubble levels (MB) Comparison of dives with MB level L0 and MB level L5 Terminology 2.1 Display during microbubble (MB) no-stop phase 2.2 Display during level stop phase 3 4 Preparation for a dive with microbubble levels (MB levels) __________________________________ 30 3.1 Setting the MB level __________________________________ 30 Functions during the dive with microbubble levels 4.1 Level stop information 4.2 Total time of ascent 4.3 Decompression obligation 4.4 Level stop and deco stop Complete a dive with MB levels Dive planner Planning a no-stop dive Planning a decompression dive Leaving the dive planner __________________________________ 30 __________________________________ 30 __________________________________ 31 __________________________________ 31 __________________________________ 32 __________________________________ 32 __________________________________ 33 __________________________________ 33 __________________________________ 34 __________________________________ 34 __________________________________ 35 __________________________________ 35 __________________________________ 35 __________________________________ 36 __________________________________ 36 __________________________________ 36 __________________________________ 36 __________________________________ 38 __________________________________ 38 __________________________________ 39 __________________________________ 39 5 VI 1 2 3 VII Logbook 1 Survey 2 Operation VIII Appendix 1 Technical information 2 Maintenance 2.1 Replacing the battery of the transmitter 3 Conversion of tank pressure 4 Warranty 5 FCC 6 Index UWATEC® Smart dive computers 7 II System and operation 1 System description Smart Z displays all important dive and decompression data and comes with a unique receiver which can receive tank pressure data from a transmitter. Mounted at the high pressure (HP) outlet of the regulator, the transmitter measures the tank pressure and radio transmits the information to Smart Z. UWATEC's specially patented transmission process prevents interference and ensures continuous and reliable reception. Smart Z has a data memory which stores the dive data. The data can be transmitted with an infrared interface (IrDA) and the SmartTRAK software to a Windows® personal computer. The SmartTRAK CD software is included with the Smart Z Package. Infrared interfaces are available in PC stores. A list of recommended interfaces is available on the UWATEC homepage (www.uwatec.com). Infrared port SmartTRAK Pressure transmitter Infrared Interface (option) 2 Operation On page 5 you will find an operating schematic. 2.1 Operating elements Contacts Smart Z 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 («bridging» contacts). Contact B: Base contact, which has to be touched for all operations. Contact E: Enter contact. It serves to switch on Smart Z and to confirm or enter the displayed value. It is therefore comparable to the ENTER or RETURN key of a keyboard. + / ­ Contacts: These allow to navigate between menus and, once inside a menu, to increase or decrease the indicated value. 8 UWATEC® Smart dive computers II System and operation 2.2 SmartTRAK With SmartTRAK you can transfer dive data to a personal computer and graphically display the data. The following settings may be changed with SmartTRAK: · Unit system · Audible attention signal suppression · Gauge mode · Depth alarm · Backlight illumination duration · Maximum partial pressure of oxygen (ppO2 max) · Time limit to reset the O2 % mix to air · Minimum reserve pressure at the end of the dive (basis for RBT calculation) · Tank pressure alarm · Workload sensitivity The following data may be recalled with SmartTRAK: · Number of past dives · Total duration of past dives · Atmospheric pressure · Pairing information · Dive profile · Logbook · Temperature curve · Workload curve · Alarms and attention messages metric/imperial selective on / off 5 - 100 m (20 - 330 feet) 2-12 sec. 1-1.95 bar no reset / 1 - 48 hrs. 20 ­ 120 bar (300 - 1750 psi) 50 - 200 bar (750 - 2900 psi) 25 steps II UWATEC® Smart dive computers 9 English 2 Operation 2.3 Switching on the display · automatically, on submerging in water or when adaptation to atmospheric pressure is necessary; · manually, by bridging contacts on housing (B-E). · When Smart Z is in state of rest no information is displayed but the atmospheric pressure is continuously monitored. If a higher altitude range is detected, Smart Z switches on for 3 minutes automatically -> 25. · Smart Z switches on by bridging the contacts B and E. All segments light up for 5 seconds. Afterwards the display shows the selected O2 mix, the temperature and in certain circumstances an altitude range ->25. If the transmitter is switched on and located within transmitting distance, the tank pressure is displayed, otherwise "---" will be displayed. If no transmitter has been paired yet, the display will be blank. If there is a remaining saturation due to the last dive or change of altitude, Smart Z also displays the remaining desaturation time, the oxygen toxicity and the "no-fly time" ->24. NO NO CNS O2% DECO STOP LEVELSTOP NO STOP % Temperature O2 Mix % Do not fly icon NO CNS O2% No-fly time Oxygen toxicity Desaturation time % 2.4 Checking the battery capacity After switching on Smart Z you can check the battery capacity by bridging the contacts B and E. The remaining capacity is displayed for 3 seconds as a percentage. If the value reaches 0%, the battery warning gets activated (->17) and the battery has to be replaced by an authorised SCUBAPRO UWATEC dealer. Battery capacity For a 7-day diving vacation Smart Z uses between 2 ­ 5 % of its battery capacity. 2.5 Selection and activation of user functions Gauge mode ->26 Input microbubble level ->30 Input O2 mix ->18 Logbook ->35 Dive planner ->33 After the selection of the desired function you can activate and deactivate it by bridging the contacts B and E. Details to the user functions are to be found on the pages mentioned above. At the surface you can select the dive planner, the logbook and gauge mode as well as the functions to enter the O2% mix and the microbubble levels by bridging the contacts + and B or ­ and B. 10 UWATEC® Smart dive computers 2 Operation / 3 SOS mode 2.6 Active backlight II The display of Smart Z can be illuminated both on the surface and underwater. The backlight can be activated by pressing on top of the case. The light will turn off automatically after 8 seconds or after the time selected via SmartTRAK. The backlight can only be activated if the computer display is on. 2.7 Switching off the display On the surface Smart Z switches off automatically after 3 minutes without operation. 3 SOS mode Time remaining until SOS mode switches off automatically NO NO CNS O2% Activation: automatic If the diver remains above a depth of 0.8m (3 feet) for more than three minutes without observing a prescribed decompression, the computer will automatically switch into SOS mode after the dive. The display shows the "SOS" sign and the remaining length of the SOS mode. The dive will be entered in the logbook with "SOS". Other than that the SOS mode has no further impact on the displays and functions on the surface. · Serious injury or death may result if a diver does not seek immediate treatment should any signs or symptoms of decompression sickness occur after a dive. · Do not dive to treat symptoms of decompression sickness! · Diving in SOS mode is extremely dangerous and you must assume full responsibility for such behaviour. UWATEC will assume no liability. % WARNING Once in the SOS mode, the computer will lock up and will be inoperable as a diving instrument for 24 hours. A diving accident can be analyzed at any time in the logbook and downloaded to a PC by means of the infrared interface (IrDA) and the SmartTRAK software. UWATEC® Smart dive computers 11 English 4 Setting up Smart Z (transmitter and dive computer) 4.1 Mounting of transmitter The transmitter is mounted at the high pressure (HP) outlet of the regulator's first stage before the first dive. WARNING Procedure: Use air and Nitrox components in accordance with the law of the country. (Adaptor) HP Do not hold the transmitter by its plastic part. Mount the transmitter at the HP oulet. If the threads do not match, you can get a fitting adaptor at your diving equipment retailer. Tighten the transmitter by means of a size 3/4" wrench. The transmitter is best mounted laterally on the regulator. It is advisable to mount the transmitter on the same side that the computer is located. This is the optimal position for transmission. Position of the transmitter for left handers. Position of the transmitter for right handers. Position of the transmitter for left handers, if there is no connection possible on the left hand side. Position of the transmitter for right handers, if there is no connection possible on the right hand side. 12 UWATEC® Smart dive computers 4 Setting up (transmitter and dive computer) 4.2 Pairing of transmitter and dive computer To receive the data of the transmitter, the transmitter itself must be paired with Smart Z. Pairing is necessary: · before the first use of Smart Z with the transmitter; · if you use a new transmitter or a new computer; · after changing the battery. Pairing procedure: 1. Shut the valve, depressurise the regulator and wait for 15 seconds. 2. Switch on Smart Z (bridge contacts B and E). II 3. Move the dive computer and transmitter into the shown position. Transmitter and dive computer must be in physical contact during the entire pairing procedure. 4. Open the tank valve. The transmitter briefly sends a pairing sequence to the computer. % 5. The dive computer shows a flashing "PAIr" shortly after the valve has been opened. 6. In order to confirm the pairing, the B and E contacts have to be bridged within 5 sec. A beep confirms the input and the "PAIr" display remains still. % 10 sec. % 7. "PAIr" disappears after approx. 10 sec. % In case of faulty pairing, the display "FAIL" appears instead of "PAIr". In that case, completely purge the regulator and repeat the pairing procedure. This is only possible after at least 15 seconds. · Pairing of transmitter and dive computer may already be carried out at home and need only be executed once, before the first use. · You may delete the pairing of transmitter and dive computer by means of the SmartTRAK software. UWATEC® Smart dive computers 13 English 4 Setting up Smart Z How to check if transmitter and computer are paired correctly: 1. 2. 3. 4. Switch on the computer manually (B and E) Move the computer into transmitting range of the transmitter. Open the tank valve. The transmitter switches on automatically. Check the display: Pairing has been carried out correctly if the pressure is displayed within 5-10 seconds. % Pairing ok % Pairing present, no pressure data available If the transmitter has been correctly paired, but Smart Z cannot receive the tank pressure, "- - -" will appear on the display. In that case, check the position of transmitter and dive computer. % Pairing not present If the transmitter has not been paired, or if an existing pairing has been deleted via SmartTRAK, the display will remain empty. In that case, transmitter and computer must be paired again. 14 UWATEC® Smart dive computer III Diving with Smart Z 1 Terminology / Symbols The information on the display of Smart Z varies depending on the kind of dive and the dive phase. III 1.1 General terminology / Display during no-stop phase Oxygen toxicity CNS O2% Ascent rate (Only while ascending) Dive time Duration of the dive (min) % SPEED No-stop phase Dive phase during which surfacing is allowed without stop. Decompression phase Dive phase during which surfacing is allowed only after decompression stops are completed. Temperature CNS O2% NO STOP % Tank pressure No-stop time Remaining time at a given depth during which ascent is allowed without decompression stop (min). Depth Current depth In metres (feet) Time Current depth 24min O2% Mix Selected oxygen fraction RBT, Remaining bottom time 26.2 m Maximum depth 37 min. Dive time Elapsed bottom time No-stop time Maximum depth reached during the dive 1.2 Display during decompression phase / Remaining Bottom Time (RBT) Total ascent time to surface (7 min) Depth Decompression stop All required decompression stops must be observed. Time 3m 6m Decompression stop duration 2 min Deepest decompression stop depth CNS O2% DECO STOP % Decompression stop depth Deepest stage is displayed. Decompression stop duration Prescribed duration of the decompression stop at the displayed decompression stage (minutes). UWATEC® Smart dive computers RBT 21 min 35.7 m No-stop range Decompression range Total ascent time Including decompression stops in minutes. Remaining Bottom Time, RBT Maximum remaining time at current depth including all decompression obligations (minutes). 15 English For information about diving with microbubble levels (MB levels) see chapter V ->28. 1 Terminology / Symbols 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 risk of oxygen toxicity rises with the increase of the fraction of oxygen and the increase of depth and can limit dive time and the maximum depth. Smart Z includes this in the calculations and displays the necessary information: "O2% MIX" Fraction of oxygen: The fraction of oxygen in the Nitrox mixture can be set between 21% (normal compressed air) and 100% in 1% increments. Your selected mix will be the basis for all calculations. Maximum allowed partial pressure of oxygen: the higher the fraction of oxygen in the mixture, the shallower the dive depth at which this value of the partial pressure of oxygen is reached. The depth at which ppO2 max. is reached is called Maximum Operating Depth (MOD). Default setting is 1.4 bar, but it can be set by means of SmartTRAK between 1.0 and 1.95 bar. When you enter the settings for the gas mixture, Smart Z will display the ppO2 max. limit setting and the corresponding MOD. Smart Z warns the diver audibly and visually once the depth is reached at which the ppO2 reaches the maximum allowed value. · The partial pressure limit set by means of SmartTRAK can be reduced manually at Smart Z (->18, setting the gas mixture). · The CNS O2% value/alarm is not influenced by the selected ppO2max. setting. "CNS O2" Oxygen toxicity: With the increased percentage of oxygen, the oxygen in the tissues (especially in the central nervous system (CNS)) becomes important. If the partial pressure of oxygen rises above 0.5 bar, the CNS O2 value increases, if the partial pressure of oxygen is below 0.5 bar, the CNS O2 value decreases. The closer the CNS O2 value is to 100%, the closer the limit where symptoms can occur. See page 21. ppO2 0,21 bar ppO2 max. CNS O2% decreases 0,5 bar CNS O2% increases WARNING Nitrox diving may only be attempted by experienced divers after proper training from an internationally recognized agency. 16 UWATEC® Smart dive computers 2 Attention messages and alarms III Smart Z draws the diver's attention to certain situations and warns the diver of unsafe diving practices. Attention messages and alarms are always visual and audible under water, only visual at the surface except the decompression alarm. The audible attention messages (but not the alarms) can be selectively switched off with SmartTRAK. WARNING 2.1 Attention messages Attention messages are communicated to the diver visually by symbols, letters or flashing figures. In addition, two short audible sequences can be heard (in an interval of 4 seconds) in two different frequencies under water. 4 sec (can be switched off) 2.2 Alarms Serious injury or death may result from failing to immediately respond to alarms given by Smart Z. Alarms are given to the diver visually by flashing symbols, letters or figures. In addition, an audible sequence in one frequency can be heard during the whole duration of the alarm. (can not be switched off) An alarm occurs in the following situations (more information can be found on the listed pages): Page · · · · Oxygen toxicity reaches 100% Ignored decompression Remaining Bottom Time = 0 Exceeding the prescribed ascent rate (Particular scale of beeps, ->20) 21 23 22 20 see below Attention messages come up in the following situations (more information can be found on the listed pages): Page · Maximum Operating Depth / max ppO2 is reached 20 · Set maximum depth is reached 19 · Oxygen toxicity reaches 75% 21 · No-stop time = 2 minutes 22 · Prohibited altitude* (surface mode) 25 · Entering decompression when diving with L0 23 · Remaining Bottom Time < 3 minutes 22 · Tank pressure has reached set warning level 21 · Increased workload 21 Diving with microbubble levels (L1-L5): · · · · MB no-stop time = 0 MB level stop ignored MB level reduced Entering decompression when diving with MB level L1-L5 30 31 31 31 · Low battery alarm** Low battery alarm Smart Z** The service symbol appears if the battery capacity reaches 0%. Take the unit to your authorised SCUBAPRO UWATEC retailer. Transmitter battery low: ** "bAt" flashing and alternating with the display of the tank pressure. Replace the battery in the transmitter ->36. *without audible attention beep **without audible alarm UWATEC® Smart dive computers 17 English 3 Preparation for the dive 3.1 Setting the gas mixture and MOD Before every dive and after changing the tank, make sure that the settings for the gas mixture correspond with the current mixture used. An incorrect setting causes Smart Z to miscalculate this particular dive. If the fraction of oxygen is set too low this can lead to oxygen poisoning without warning. If the value is set too high decompression sickness may occur. Inaccuracies in the calculations are carried over to repetitive dives. To set the gas mixture, Smart Z must be in user mode. ... ... 1. Bridge contacts B and + or B and ­ until the symbol for the setting of the O2 mixture appears. 2. Confirm that you wish to change the displayed oxygen fraction by bridging B and E. +­ % WARNING 3. Change the oxygen fraction in increments of 1% by bridging B and + or B and ­. Smart Z will display the current fraction of oxygen, the maximum partial pressure limit, ppO2 max (as pre-set by means of SmartTRAK) and the MOD. 4. Confirm the selected percentage with B and E. O2% mix PpO2max. Max. Operating Depth MOD % +­ 5. By bridging B and + or B and ­ you can change the MOD for the chosen fraction of oxygen. Smart Z will now display the corresponding partial pressure limit (ppO2 max) for the new MOD. 6. Confirm your MOD settings with B and E. ppO2max. · Without confirmation the display will disappear after 3 minutes and your entries will not be accepted. · The time to reset the O2 % mix to air can be set with SmartTRAK between 1 and 48 hours or to "no reset" (default). 3.2 Setting the MB level See chapter V, ->28 3.3 Preparation for the dive and function check The following descriptions of the preparation are based on the assumption that the transmitter has been correctly mounted at the HP outlet of the regulators (->12) and successfully paired with Smart Z (->13). 1. Mount the regulator together with the transmitter on the tank WARNING NO NO 2. If present, check the reserve valve of your tank, the reserve valve must be open. 3. Switch on Smart Z (B-E) and check the test display: Are all elements of the display activated? Do not use Smart Z if the display does not show all elements. 4. Open the valve (transmitter will switch on automatically) and check the tank pressure (after approx. 10 seconds). If the pressure is insufficient, change the tank. 5. Check the connections and instruments for leaks. Never dive with leaky equipment! UWATEC® Smart dive computers CNS O2% DECO STOP LEVELSTOP NO STOP % 18 4 Functions during the dive III 4.2 Dive time Dive time The whole time spent below a depth of 0.8m (3 feet) is displayed as dive time in minutes. The time above 0.8m (3 feet) is counted as dive time only if the diver descends again below 0.8m (3 feet) within 5 minutes. While the dive time is running, the colons on the right of the figures are 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. Current depth is given in 10 cm increments (1 foot). At a diving depth of less than 0.8 m (3 ft) the display shows "­ ­ ­". Depth measurement is based on freshwater. Therefore, Smart Z shows a slightly greater depth when diving in salt water, depending on the salinity of the water. No calculation however is affected. NO STOP 4.3 Current depth NO STOP % Current depth 4.4 Maximum depth CNS O2% % Maximum depth is only displayed if it exceeds the current depth by more than 1 m (3 feet) (maximum indicator function). NO STOP 4 sec CNS O2% WARNING Set maximum depth reached If the maximum depth set with SmartTRAK has been reached (default 40m/130 feet), the current depth will flash and the ascent arrow will be displayed. Ascend until the ascent arrow disappears. Maximum depth NO STOP Ascent arrow 4.5 Temperature Smart Z permanently displays the temperature, under water and on the surface as long as the computer is turned on. Temperature NO STOP 4.6 Ascent rate Optimal ascent rate varies depending on depth between 7 and 20 m/min (23 and 67 ft/min). It is displayed as a percent of the reference variable ascent rate. 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. Smart Z provides an audible alarm if the ascent rate is 110% or greater. The intensity of the alarm increases in direct proportion to the degree that the prescribed ascent rate is exceeded. NO STOP Ascent rate UWATEC® Smart dive computers 19 English 4.1 Immersion After immersion, starting at a depth of about 0.8 m (3 ft), all diving functions are monitored, i.e. depth and dive time displayed, maximum depth stored, saturation of tissues calculated, no-stop time or decompression prognosis determined, ascent rate controlled and displayed and the correctness of the decompression procedure supervised. In addition, Smart Z also shows the tank pressure and about 2 minutes into the dive the Remaining Bottom Time (RBT) is displayed. 4 Functions during the dive WARNING 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. · In case of an improper ascent Smart Z may require a decompression stop even within the no-stop phase because of the danger of microbubble formation. · The decompression duration necessary for the prevention of microbubbles can increase massively if the ascent rate is exceeded. · From great depth a slow ascent may cause heightened saturation of tissues and an extension of both decompression duration and total ascent time. At shallow depth, a slow ascent may shorten the decompression duration. · Display of the ascent rate has the priority over "CNS O2". WARNING Ascent rate % SPEED Visual alarm S L O W Audible alarm % SPEED S L O W % SPEED S L O W % SPEED S L O W Reduce ascent rate Excessive ascent rates for longer periods are entered in the logbook. The following ascent rates correspond to the 100% value in Smart Z. depth (m) speed (m/min) depth (ft) speed (ft/min) <6 7 <20 23 <12 8 <40 26 <18 9 <60 29 <23 10 <75 33 <27 11 <88 36 <31 13 <101 43 <35 15 <115 49 <39 17 <128 56 <44 18 <144 59 <50 19 <164 62 >50 20 >164 66 4.7 Partial pressure of oxygen (ppO2 max) / Maximum Operating Depth (MOD) The maximum partial pressure of oxygen ppO2 max (default 1.4 bar) determines 4 sec the Maximum Operating Depth (MOD). Diving deeper than the MOD will expose the diver to oxygen partial pressures higher than the set maximum level. The MOD and consequently the ppO2 max can be reduced manually at Smart Z (->18, setting the gas mixture, point 5). In addition the maximum allowed ppO2 can be set by means of SmartTRAK % between 1.0 to 1.95 bar. CNS O2% NO STOP WARNING The MOD is a function of ppO2 max and the mixture used. If during the dive the MOD is reached or exceeded Smart Z sends an audible attention message, the ascent arrow appears and the current depth display starts flashing. Ascend to a shallower depth in order to diminish the danger of oxygen poisoning. WARNING · The MOD should not be exceeded. Disregarding the warning can lead to oxygen poisoning. · ppO2 max should not be set higher than 1.6 bar. UWATEC® Smart dive computers 20