User manual UWATEC SMART TEC

Smart TEC ® SWISS MADE BY UWATEC AG English Operating Manual Safety considerations You must carefully read and understand this entire manual before using your Smart TEC. 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 Smart TEC! WARNING Guidelines for the use of Smart TEC: The following guidelines for using Smart TEC 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. · Smart TEC is designed for dives with Nitrox (to a max.100% O2) and compressed air (21%O2) only. Do not use Smart TEC 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 Smart TEC with open circuit breathing systems. The gas mixture must be determined for each pressure tank you use. · Only use Smart TEC for diving with an independent breathing apparatus. Smart TEC is not designed for long term exposures with Nitrox. · Always observe the visual and audible alarm signals of Smart TEC. 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. · Smart TEC 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 Limit), 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. Smart TEC gives no warning about this. · On all dives with Smart TEC, 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 Smart TEC 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 TEC does not substitute for a dive buddy. · Only make dives that are appropriate to your level of dive training. Smart TEC does not increase your knowledge of diving. 2 I 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 Smart TEC! 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. · Do not attempt a repetitive dive if the microbubble warning is visible on the display. · 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 Smart TEC prohibits via the flashing altitude segments. (->25) Flying after diving · After diving, wait at least 24 hours prior to flying. Smart TEC 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. I UWATEC® Smart dive computers 3 English Introduction Congratulations on purchasing Smart TEC 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. Smart TEC enables you to use up to three different gas mixtures during the same dive. However, for an easy reading this manual mainly refers to dives with a single gas mixture. Information for diving with several gas mixtures is marked with ( ) or has been summarised in special chapters. We thank you for choosing Smart TEC 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 'TEC' as an abbreviation for 'UWATEC Smart TEC 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 TEC. Important remarks concerning signal words and symbols This operating manual makes use of the following icons to indicate especially important comments: Remarks Information and tips which are important for optimal use of the functions of Smart TEC. Danger! 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 Valid only for dives with more than one gas mixture -> Page reference e.g. ->10 Audible signals 4 sec. Audible attention signal Audible alarm signal Instructions for manual input ­+E B September 2004, Copyright© by UWATEC Switzerland Bridge contacts Example: bridging contacts B and E Push buttons Press or press and hold (->9) e.g. press the upper left button 4 I UWATEC® Smart dive computers Quick reference O2 mix icon (input) Gauge icon Logbook icon Dive planner icon Current depth Service icon CNS O2% NO NO I Microbubble level icon (input / MB level reduced) Do not fly Icon Do not dive icon Microbubble warning Dive time / No-fly time / SOS duration Icon for stopwatch and safety stop 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 / Number of active tanks Tank pressure warning At the surface: several gas mixture have been set Decompression depth / Level stop depth Oxygen toxicity CNSO2 Ascent rate Battery capacity Ascent obligation Altitude sections Too fast ascent Maximum depth Temperature Microbubble level Maximum Operating Depth (MOD) DECO STOP LEVELSTOP NO STOP % Transmitter warning O2 mix Tank icons Decompression stop obligation Ignored decompression stop Tank pressure / Gas consumed Partial pressure of oxygen ppO2 Level stop indicator No-stop indicator Decompression stop indicator Operating scheme Start / Confirmation / Enter + / Navigate ­ / Navigate Display switched off Select (press) and confirm (press and hold) gas mixtures Activate the timer for safety stops (dive mode only, in depths < 6.5 m / 20 ft) (press) Operate the stopwatch (gauge mode only) (press) Set a bookmark (press) Toggle between maximum depth > temperature > MB level > ...(press) Intermediate time and reset (in gauge mode only and while stopwatch is active) (press) Switching on the backlight (press and hold) 10 O2 mix 18 Microbubble level 28 Gauge mode 26 Switching on Dive planner 37 Logbook 39 Navigation ( % + Surface ­ interval ) % % % Battery capacity % 10 + ­ Percentage of oxygen NO STOP + ­ Maximum operating depth (MOD) Microbubble level + ­ Gauge mode on and off + ­ + ­ Bottom time Dive number + ­ Exit (2 sec.) Exit Confirmation Confirmation Confirmation Display switches off automatically after 3 minutes without operation. I UWATEC® Smart dive computers 5 English List of chapters I Safety considerations Introduction Important remarks concerning signal words and symbols Quick reference / Operating scheme List of chapters 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 TEC 4.1 Mounting of transmitter 4.2 Pairing of transmitter and dive computer ___________________________________2 ___________________________________4 ___________________________________4 ___________________________________5 ___________________________________6 ___________________________________8 ___________________________________8 ___________________________________8 ___________________________________8 ___________________________________9 __________________________________10 __________________________________10 __________________________________10 __________________________________11 __________________________________11 __________________________________11 __________________________________12 __________________________________12 __________________________________13 II 1 2 3 4 III Diving with Smart TEC __________________________________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 1.3 Nitrox information (O2 information) __________________________________16 2 Attention messages and alarms 2.1 Attention messages 2.2 Alarms __________________________________17 __________________________________17 __________________________________17 3 Preparation for the dive __________________________________18 3.1 Setting the gas mixture and MOD __________________________________18 3.2 Setting the MB level __________________________________18 3.3 Preparation for diving with more than one gas mixture ________________________________18 3.4 Preparation for the dive and function check __________________________________18 Functions during the dive __________________________________19 4.1 Immersion __________________________________19 4.2 Setting bookmarks __________________________________19 4.3 Dive time __________________________________19 4.4 Current depth __________________________________19 4.5 Maximum depth / Temperature __________________________________19 4.6 Ascent rate __________________________________19 4.7 Partial pressure of oxygen (ppO2) / Maximum Operating Depth (MOD) ___________________20 4.8 Oxygen toxicity (CNS O2%) __________________________________21 4.9 Tank pressure __________________________________21 4.10 Remaining Bottom Time (RBT) __________________________________22 4.11 Decompression information __________________________________22 4.12 Safety stop timer __________________________________23 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 I UWATEC® Smart dive computers 4 5 6 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 Diving with more than one gas mixture Dive planner Planning a no-stop dive Planning a decompression dive Leaving the dive planner __________________________________30 __________________________________30 __________________________________31 __________________________________31 __________________________________32 __________________________________32 __________________________________32 __________________________________37 __________________________________37 __________________________________38 __________________________________38 __________________________________39 __________________________________39 __________________________________39 __________________________________40 __________________________________40 __________________________________40 __________________________________40 __________________________________42 __________________________________42 __________________________________43 __________________________________43 5 VI VII 1 2 3 VIII Logbook 1 Survey 2 Operation IX 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 I UWATEC® Smart dive computers 7 II System and operation 1 System description TEC displays all important dive and decompression data and comes with a unique multichannel receiver, which can receive tank pressure data from up to 3 transmitters. Each transmitter is mounted at the high pressure (HP) outlet of the regulator, where it measures the tank pressure and radio transmits the information to TEC. UWATEC's specially patented transmission process prevents interference and ensures continuous and reliable reception TEC 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 SmartTRAK Package. Infrared interfaces are available in PC stores. A list of recommended interfaces is available on the UWATEC homepage (www.uwatec.com). Smart TEC SmartTRAK Infrared port Infrared Interface (option) Pressure transmitter 2 Operation On page 5 you will find an operating schematic. 2.1 Operating elements Contacts + E TEC 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 TEC 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. NO CNS O2% NO DECO STOP LEVELSTOP NO STOP % B 8 II UWATEC® Smart dive computers II System and operation Push buttons I To use the push buttons TEC must be switched on. Operation of the push buttons is divided into «press» and «press and hold (1 second)». The push buttons , and activate the following functions: Select the gas mixture (press) Confirm the gas mixture (press and hold) Activate the timer for safety stops (dive mode only, in depths < 6.5 m / 20 ft) (press) Operate the stopwatch (gauge mode only) (press) Set a bookmark (press) Toggle between maximum depth > temperature > MB level > ... (press) Intermediate time and reset (in gauge mode only and while stopwatch is active) (press) Switching on the backlight (press and hold) 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 Replace audible RBT alarm by audible attention signal Workload sensitivity Safety stop duration metric/imperial selective 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 1-5 min. The following data may be recalled with SmartTRAK: · · · · · · · · · · Number of past dives Total length of past dives Atmospheric pressure Pairing information from up to 3 transmitters Dive profile Logbook Temperature curve Workload curve Alarms and attention messages Bookmarks I 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). II NO CNS O2% NO · When TEC is in state of rest no information is displayed but the atmospheric pressure is continuously monitored. If a higher altitude range is detected, TEC switches on for 3 minutes automatically. -> 25 · TEC 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 appertaining 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, TEC also displays the remaining desaturation time, the oxygen toxicity and the "no-fly time" ->24. DECO STOP LEVELSTOP NO STOP % Temperature % O2 Mix Do not fly icon NO No-fly time Oxygen toxicity Desaturation time % 2.4 Checking the battery capacity After switching on TEC 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. For a 7-day diving vacation TEC uses between 2 ­ 5 % of its battery capacity. Battery capacity 2.5 Selection and activation of user functions 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. Gauge mode ->26 Input microbubble level ->30 Input O2 mix ->18 Logbook ->39 Dive planner ->37 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. 10 I UWATEC® Smart dive computers 2 Operation / 3 SOS mode 2.6 Active backlight The display of TEC can be illuminated both on the surface and underwater. The backlight can be activated by pushing and holding button for 1 second. 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. I WARNING 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. 2.7 Switching off the display On the surface TEC switches off automatically after 3 minutes without operation. 3 SOS mode Time remaining until SOS mode switches off automatically NO CNS O2% NO 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. I UWATEC® Smart dive computers 11 English 4 Setting up Smart TEC (transmitter and dive computer) 4.1 Mounting of transmitter Each individual pressure tank requires a separate 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. If pressure tanks 2 and D are carried at the side, make sure the position of their transmitters in relation to TEC resembles that of the transmitter of the main tank on the back. 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 I 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 transmitters, each transmitter must be assigned to one tank symbol and paired with TEC. Pairing is necessary: · before the first use of TEC with the transmitter; · if you use a new transmitter or a new computer; · after changing the battery; · if a different tank symbol (1, 2, or D) is to be paired to the transmitter; e.g. The transmitter is to be paired to tank symbol D instead of tank symbol 2. To distinguish your tanks and transmitters you should regard the following assignments: Bottom Mix Transmitter 1 Lowest oxygen % Travel Mix Transmitter 2 Intermediate oxygen % Deco Mix Transmitter 3 Highest oxygen % I Note that you can also set 2 or even 3 tanks to the same gas mixture. This comes in handy when diving with twin tanks or with double outlet on a single tank. Pairing procedure: 1. Shut the valve, depressurise the regulator and wait for 15 seconds. 2. Switch on TEC (bridge contacts B and E). Select the tank symbol you wish to pair with a certain transmitter by pressing . Selected tank symbol will flash. Confirm the selection by pressing for at least 1 second. Tank symbol stops flashing. Tank symbol 2 can only be selected after tank symbol D has been assigned to a certain gas mixture. 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 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 display remains still. % % 10 sec. 7. "PAIr" disappears after approx. 10 sec. % % In case of faulty pairing, the display appears instead of . In that case, completely purge the regulator and repeat the pairing procedure. This is only possible after at least 15 seconds. I UWATEC® Smart dive computers 13 English 4 Setting up Smart TEC · Pairing of transmitter and dive computer may already be carried out at home and need only be executed once, before the first use. · A transmitter can only be paired with a single tank symbol at a time. If you try to pair the same transmitter with a second tank symbol, the first pairing will automatically be deleted. · The pairing of transmitter and tank symbol will remain valid, even if the gas mixture is switched off (-> 34, switching off of gas mixtures). · You may delete the pairing of transmitter and dive computer by means of the SmartTRAK software. How to check if transmitter and computer are paired correctly: 1. Switch on the computer manually (B and E) 2. To check the pairing of a certain tank symbol, press to select the tank symbol. Confirm your choice by pressing for 1 second. 3. Move the computer into transmitting range of the transmitter. 4. Open the tank valve. The transmitter switches on automatically. 5. Check the display: Pairing has been carried out correctly if the pressure is displayed within 5-10 seconds. % Pairing ok Check the assignment of all tanks and transmitters as well as the pairing of transmitters and dive computer! % If the transmitter of a selected pressure tank has been correctly paired, but TEC cannot receive the tank pressure, "- - -" will appear on the display. In that case, check the position of transmitter and dive computer. Pairing present, no pressure data available If the specific channel of transmission (i.e. tank) 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. % Pairing not present 14 I UWATEC® Smart dive computer III Diving with Smart TEC 1 Terminology / Symbols III 1.1 General terminology / Display during no-stop phase No-stop phase Oxygen toxicity CNS O2% Ascent rate (Only while ascending) Current depth In metres (feet) Dive time Duration of the dive (min) % SPEED Decompression phase Dive phase during which surfacing is allowed only after decompression stops are completed. Dive phase during which surfacing is allowed without stop. Time Depth CNS O2% NO STOP % Tank pressure No-stop time Remaining time at a given depth during which ascent is allowed without decompression stop (min). RBT, Remaining bottom time Current depth 24min 26.2 m Maximum depth 37 min. Dive time Elapsed bottom time No-stop time O2% Mix Selected oxygen fraction tank 1 Maximum depth Temperature Maximum depth reached during the dive MB Level... 1.2 Display during decompression phase / Remaining Bottom Time (RBT) Decompression stop All required decompression stops must be observed. Total ascent time to surface (7 min) Time Depth 3m 6m Decompressionstop duration 2 min CNS O2% Deepest decompression stop depth DECO STOP % Decompression stop depth Deepest stage is displayed. Decompression stop duration Prescribed duration of the decompression stop at the displayed decompression stage (minutes). RBT 21 min 35.7 m No-stop range Total ascent time Including decompression stops in minutes. Decompression range Remaining bottom time, RBT Maximum remaining time at current depth including all decompression obligations (minutes). III UWATEC® Smart dive computers 15 English The information on the display of TEC varies depending on the kind of dive and the dive phase. For information about diving with microbubble levels (MB level) see chapter IV ->28. Specific features of "Diving with more than one gas mixture", are described in chapter VI -> 32. 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. TEC includes this in the calculations and displays the necessary information: 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, TEC will display the ppO2 max. limit setting and the corresponding MOD. TEC 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 TEC (->18, setting the gas mixture). · The CNS O2% value/alarm is not influenced by the selected ppO2max. setting. 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 CNS O2% decreases 0,5 bar CNS O2% increases ppO2 max. WARNING Nitrox diving may only be attempted by experienced divers after proper training from an internationally recognized agency. 16 III UWATEC® Smart dive computers 2 Attention messages and alarms III TEC 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. 2.2 Alarms 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) Serious injury or death may result from failing to immediately respond to alarms given by TEC. 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 zero ( can be switched to attention beep) · Exceeding the prescribed ascent rate (Particular scale of beeps, ->20) · Low battery alarm* 21 23 22 20 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 · Depth for tank switch has been reached 35 see below 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 TEC* The service symbol appears if the battery capacity reaches 0%. Take the unit to your authorised SCUBAPRO UWATEC retailer. Transmitter battery low: * flashing and alternating with the display of the tank pressure. Replace the battery in the transmitter. ->40 % NO STOP NO STOP *without audible alarm *without audible alarm III 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 mixtures correspond with the current mixtures used. An incorrect setting causes TEC 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. WARNING For dives with a single gas mixture, assign the gas mixture to tank symbol 1 and shut off gas mixtures 2 and D. ->34 If more than one gas mixture has been selected, TEC will display at the surface and the number of gas mixtures. For dives with several gas mixtures please read pages 32 and 13 for further reference. To set the gas mixture, TEC must be in user mode. 1. Press to choose the tank for the O2 mixture you are going to enter. The tank symbol will start flashing. Press and hold to confirm your selection. ... 2. Bridge contacts B and + or B and ­ until the symbol for the setting of the O2 mixture appears. ... 3. Confirm that you wish to change the displayed oxygen fraction by bridging B and E. 4. Change the oxygen fraction in increments of 1% by bridging B and + or B and ­. TEC will display the current fraction of oxygen, the maximum partial +­ pressure limit, ppO2 max (as pre-set by means of SmartTRAK) and the MOD. 5. Confirm the selected percentage with B and E. % 6. By bridging B and + or B and ­ you can change the MOD for the chosen fraction of oxygen. TEC will now display the corresponding partial pressure limit (ppO2 +­ O2% mix max) for the new MOD. PpO2max. 7. Confirm your MOD settings with B and E. Max. Operating % ppO2max. Depth MOD · Without confirmation the display will disappear after 3 minutes and your entries will not be accepted. · Please refer to page 32 for the setting of gas mixtures for tanks 2 and D. · 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 3.3 Setting the MB level See chapter V, ->28 Preparation for diving with more than one gas mixture See chapter VI, ->32 3.4 Preparation for the dive and function check The following descriptions of the preparation are based on the assumption that all transmitters have been correctly mounted at the HP outlet of the regulators (->12) and successfully paired with TEC (->13). 1. Mount the regulator together with the transmitter on the tank 2. If present, check the reserve valve of your tank, the reserve valve must be open. 3. Switch on TEC (B-E) and check the test display: Are all elements of the display activated? Do not use TEC 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! Repeat 4 and 5 with all transmitters you are going to use. WARNING NO CNS O2% NO DECO STOP LEVELSTOP NO STOP % 18 III UWATEC® Smart dive computers 4 Functions during the dive III 4.2 Setting bookmarks During the dive you can create bookmarks in your dive profile by pressing . An audible signal confirms the creation of the bookmark. These bookmarks will be graphically displayed in the dive profile of SmartTRAK. To visualize the bookmarks on the dive profile, you must select the box "Generate bookmarks" under "Program options" in SmartTRAK. 4.3 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 999 minutes. If a dive lasts longer than 999 minutes the dive time display starts again at 0 minutes. NO STOP % 4.4 Current depth Current depth is given in 10 cm increments (1 foot). On switching on and at a diving depth of less than 0.8 m (3 ft) the display shows <­ ­ ­>. Depth measurement is based on freshwater. Therefore, TEC shows a slightly greater depth when diving in salt water, depending on the salinity of the water. No calculation however is affected. % NO STOP % Current depth 4.5 Maximum depth / Temperature Maximum depth is only displayed if it exceeds the current depth by more than 1 m (3 feet) (maximum indicator function). If maximum depth is not displayed, TEC shows the temperature. CNS O2% 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 display will flash and the ascent arrow will be displayed. Ascend until the ascent arrow disappears. Maximum depth NO STOP % Ascent arrow 4.6 Ascent rate NO STOP % Ascent rate III UWATEC® Smart dive computers 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 appears. If the ascent rate exceeds 140%, the arrow starts flashing. TEC 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. 19 English 4.1 Immersion After immersion, starting at a depth of about 0.8 m (3 ft), TEC automatically selects gas mixture 1, 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, TEC 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 TEC 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 . WARNING Ascent rate Visual alarm S L O W Audible alarm % SPEED % SPEED S L O W % SPEED S L O W % SPEED S L O W Excessive ascent rates for longer periods are entered in the logbook. 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 TEC (->18, setting the gas mixture, point 6). 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 passed TEC 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. Change to the gas mixture that is required at this depth by selecting the appropriate tank symbol. 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. 20 III UWATEC® Smart dive computers 4 Functions during the dive CNS O2% III 4 sec CNS O2% WARNING city reaches 75%. The symbol flashes and the ascent arrow appears. Ascend to shallower depth to decrease oxygen loading. When oxygen toxicity reaches 100%, an audible alarm goes off every 4 seconds. , the precentage value and the ascent arrow flash. Danger of oxygen toxicity! Start ascent at once. WARNING CNS O2% NO STOP % · During an ascent and if the CNS O2 % value does not increase anymore (due to a lower partial pressure of oxygen), the audible warning is suppressed. · During the ascent, the display of the oxygen toxicity is replaced by the ascent rate. If the ascent is stopped, the display changes back to the indication of the CNS value. · TEC will display CNS O2 % values exceeding 199 % with 199 %. The tank pressure is also used for the calculation of the remaining bottom time (RBT) and the workload. 4.9 Tank pressure % 4 sec WARNING When the tank pressure reaches the set warning pressure (SmartTRAK) an audible alarm goes off and the tank symbol is shown. Default value of warning pressure: 100 bar (1450 psi) Do not dive any deeper. Start to ascend soon. In case of increased workload, TEC displays a lung symbol and an audible alarm goes off. (The sensitivity of workload can be changed with SmartTRAK). In order to prevent additional saturation, reduce exertion, relax and breathe more slowly. If TEC receives no data for 30 seconds, an audible alarm goes off and the transmitter warning appears. 4 sec WARNING 4 sec WARNING % Transmitter warning If TEC does not receive pressure data for another 40 seconds, it will activate another audible alarm. RBT and transmitter warning will no longer be displayed. Instead of the tank pressure value TEC will display "- - -". Check the position of transmitter and TEC. Start ascending at once. TEC will switch back to its normal display as soon as new data is received. If the tank pressure is lower than 14bar/200psi the transmitter switches off and TEC will display "---". Do not let the tank pressure drop below 14bar/200psi. WARNING If tank pressure <14 bar/200psi III UWATEC® Smart dive computers 21 English 4.8 Oxygen toxicity (CNS O2%) TEC calculates oxygen toxicity from depth values, time and the gas mixture and displays it in place of the ascent rate. The toxicity is expressed in 1% increments of a maximum tolerated value (O2 clock). The symbol is displayed together with the percentage. % Oxygen toxicity An audible attention signal goes off if oxygen toxiNO STOP 4 Functions during the dive 4.10 Remaining Bottom Time (RBT) RBT is the time left at the current depth until the point of time when the ascent must be started. The RBT is calculated on the basis of the current tank pressure, breathing rate, the temperature, and the dive data so far recorded. The RBT is based on the assumption that the tank pressure should amount to the set pressure (default 40 bar/600 psi) at the end of the dive. Alterations can be made with SmartTRAK. A graphic representation of RBT is on page 15. During dives with several gas mixtures, the calculation of the RBT is based on the assumption that the diver will use the current gas mixture to finish the dive.->34, 35 Never allow the RBT to go below three minutes. If the RBT goes below three minutes there is a danger of insufficient supply of gas mixture for the ascent as well as an increased risk of decompression sickness, and serious injury or death may result! Correct calculation of RBT when using a reserve or "J" type valve is possible only if the reserve function of the valve is in the open (down) position during the dive. WARNING 4 sec WARNING If the RBT drops below three minutes, an audible attention signal is activated, the ascent arrow is displayed and the tank icon start flashing. Start ascent immediately. The RBT value should never reach <0:>. With RBT=0 the remaining tank reserve may not be sufficient for the ascent. NO STOP % WARNING RBT < 3 minutes When the last minute has passed (RBT=0) an audible alarm is activated every 4 seconds. The RBT, the ascent arrow and the tank icon start flashing. The audible alarm* on exceeding the RBT is suppressed at depths less than 6.5 m (21 ft) if TEC is in the no-stop phase. Start ascent at once. NO STOP * % The audible RBT alarm can be changed to an audible attention signal by 4 sec means of SmartTRAK. RBT = 0 minutes 4.11 Decompression information No-stop time is displayed if no decompression stops are necessary. The arrow NO STOP decompression stops are necessary. The figures indicate no-stop time in minutes. is visible if no NO STOP · No-stop display <199:> means remaining time of 199 minutes or more. · No-stop time is calculated on line and influenced by the current workload and current water temperature If no-stop time drops below 3 minutes, an audible attention signal is activated and the no-stop value begins to flash. If no-stop time is less than 1 minute, the no-stop display shows the flashing value "0". In order to prevent a decompression dive, ascend slowly until the no-stop time is 5 minutes or more. Dives that require decompression stops are not recommended. III UWATEC® Smart dive computers % No-stop time 4 sec CNS O2% WARNING NO STOP % WARNING 22 4 Functions during the dive Decompression values III CNS O2% DECO STOP % Decompression stop depth Decompression time On entering the decompression phase, the arrow NO STOP disappears, the arrow DECOSTOP appears and an attention beep goes off. Right beside the arrow, the deepest decompression stage in metres (feet) is displayed. Next to the decompression stop depth, the decompression stop duration of the displayed stage appears in minutes. The display <3m 7:> means that a decompression stop of 7 minutes at a depth of 3m 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. Deco stop depths deeper than 27m (90 ft) are displayed as <­ ­ : ­ ­ > The decompression alarm is activated if the decompression stop is ignored. The arrow DECOSTOP , the decompression stop duration and decompression stop depth begin to flash and an audible alarm goes off. 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 , the decompression stop duration and decompression stop depth continue 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 (->11). 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 stop depth immediately! WARNING CNS O2% DECO STOP Ignored decompression alarm Total time of ascent As soon as decompression stops are necessary TEC shows the total time of ascent. This includes the ascent time from the current depth to the surface and all decompression stop obligations. The total time of ascent is calculated on the basis of the prescribed ascent rate and a normal workload. Total time of ascent can be subject to change if the ascent rate is not ideal (100%) or if TEC detects a higher workload. Ascent time greater than 199 minutes is displayed as <­ ­>. DECO STOP % Total time of ascent WARNING On all dives with TEC, make a safety stop for at least three minutes at a depth of 5 m (15 feet). 4.12 Safety stop timer The safety stop timer displays the time span a diver should spend at the safety stop depth at the end of the dive. The timer is activated by the diver and counts back to zero, starting with the time that was pre-set with SmartTRAK. It can be restarted any number of times. Range: 1 - 5 minutes (default 3 min.) CNS O2% The safety stop timer can be activated under the following conditions: Depth < 6.5 m (21 ft), no-stop display 199 min., gauge mode is switched off. Activate the safety stop timer by pressing . The timer begins to count backwards and a bookmark will be created in the dive profile. The safety stop timer will switch off automatically if the depth exceeds 6.5 m (21 ft) or the no-stop phase is shorter than 199 minutes. STOP % safety stop icon remaining time span minutes seconds III UWATEC® Smart dive computers 23 English 5 Functions at the surface 5.1 End of a dive After reaching the surface (<0.8 m/3 ft) TEC remains in dive mode for 5 minutes. The delay allows for surfacing for a short period for orientation. After 5 minutes the dive is closed and it is entered into the logbook. % WARNING For the calculations of the desaturation and no-fly time it is assumed that the diver breathes air while on the surface. 5.2 Desaturation time NO