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. WARNING 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.
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.
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.
Quick reference I O2 mix icon (input) English Microbubble level icon (input / MB level reduced) Do not fly Icon Do not dive icon Microbubble warning Gauge icon Logbook icon Dive planner icon Dive time / No-fly time / SOS duration Current depth NO Service icon CNS O2% Ascent obligation Altitude sections Too fast ascent 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 ti
List of chapters I Safety considerations Introduction Important remarks concerning signal words and symbols Quick reference / Operating scheme List of chapters ___________________________________2 ___________________________________4 II 1 System and operation System description ___________________________________8 ___________________________________8 2 Operation 2.1 Operating elements 2.2 SmartTRAK 2.3 Switching on the display 2.4 Checking the battery capacity 2.
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 IV Gauge mode __________________________________26 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.
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.
II System and operation 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.
2 Operation II 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 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 NO CNS O2% NO DECO STOP LEVELSTOP NO STOP • TEC switches on by bridging the contacts B and E.
2 Operation / 3 SOS mode 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. 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.
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 • Use air and Nitrox components in accordance with the law of the country. Procedure: HP (Adaptor) Do not hold the transmitter by its plastic part. Mount the transmitter at the HP oulet.
Bottom Mix Transmitter 1 Lowest oxygen % Travel Mix Transmitter 2 Intermediate oxygen % Deco Mix Transmitter 3 Highest oxygen % 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 .
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).
III Diving with Smart TEC III 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.
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.
2 Attention messages and alarms III The audible attention messages (but not the alarms) can be selectively switched off with SmartTRAK. 2.2 Alarms WARNING Serious injury or death may result from failing to immediately respond to alarms given by TEC. 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.
3 Preparation for the dive 3.1 Setting the gas mixture and MOD WARNING 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.
III 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.
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.
4 Functions during the dive III 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 toxiCNS O2% WARNING 4 sec CNS O2% WARNING CNS O2% NO STOP city reaches 75%.
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.
CNS O2% DECO STOP % Decompression stop depth Decompression time III 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.
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.
% Altitude range 1 Desaturation time Adaptation time Altitude ranges III TEC measures the atmospheric pressure every 60 seconds even while the display is switched off. If the computer detects a sufficient increase in altitude, it switches on automatically and indicates the new altitude range (1-4) and the desaturation time. Desaturation time indicated at this moment refers to adaptation time at this altitude.
IV Gauge mode WARNING In gauge mode ALL audible and visual alarms and attention messages are turned off. This includes ascent speed, low tank pressure and interrupted signal from transmitter. In gauge mode TEC will display depth, dive time and tank pressure, the maximum depth is stored, ascent rate and tank pressure are monitored. By pressing you can switch from maximum depth to temperature and vice versa. You can also activate the stopwatch and check the split time.
IV Gauge mode III Stopwatch icon Hours Timing Minutes Seconds Stopwatch Example will start 00h00 00 automatically after 00h00 15 immersion 00h02 35 Automatically at the end of 00h00 00 dive In gauge mode, after immersion, TEC will automatically monitor the dive time and at the same time activate the stopwatch. If the gauge symbol and "on" are displayed (-> 26, point 1) the stopwatch can also be activated at the surface by pressing .
V Diving with microbubble levels (MB) The following chapter deals with the characteristics of diving with microbubble levels (MB level). For general information about displays and features of diving with TEC see chapter III. Microbubbles are tiny bubbles that can build up inside a diver's body during any dive and normally dissipate naturally during an ascent and on the surface after a dive.
2 Terminology V This chapter will exclusively deal with terminology and display features used while diving with MB levels. All other features are described in chapter III (page 15). Level stop phase MB no-stop phase Dive phase during which surfacing is possible without MB level stop. MB level activated Level L2 is active English 2.
3 Preparation for a dive with microbubble levels (MB levels) 3.1 Setting the MB level To change the MB level TEC must be in user mode. 1. Bridge contacts B and + until the symbol for MB levels appears. 2. Confirm that you wish to change the displayed MB level by bridging B and E. + – 3. Change MB level by bridging contacts B and + or B and – . 4. Confirm with B and E the selected MB level. Without confirmation the display will disappear after 3 minutes and your entries will not be accepted.
4 sec WARNING CNS O2% LEVELSTOP V The attention message "Level stop ignored" is activated if the requested level stop is not observed. An attention beep* goes off, the arrow LEVELSTOP , the depth and duration of the ignored level stop begin flashing.
4 Functions during the dive with microbubble levels 4.4 Level stop and deco stop When the level stop depth equals the depth of the first obligatory decompression stop and if you are within 1.5m/5feet of the stop depth itself, TEC shows DECOSTOP and LEVELSTOP . The indicated duration refers to level stop duration.
VI Diving with more than one gas mixture VI Setting the gas mixture and the depth for changing the gas mixture During dives with more than one gas mixture the bottom mix Range of O2 fraction (tank 1) contains the lowest fraction of oxygen, while the deco mix (tank D) contains the highest fraction. The additional travel O2 fraction mix (tank 2) for dives with 3 gas mixtures holds a fraction of 100% oxygen that is between that of tank 1 and tank D.
VI Diving with more than one gas mixture Switching off gas mixtures Tanks which are not going to be used during the next dive (even though their fraction of oxygen has been defined) must be "switched off". This is achieved by switching off the appropriate gas mixture at TEC. Gas mixtures which have been switched off cannot be selected during the dive and TEC will ignore their transmitters. Tank 1 cannot be switched off.
Diving with more than one gas mixture VI DECO STOP … LEVELSTOP NO STOP % Procedure: • switch to the regulator with the new gas mixture and start breathing • confirm the change by pressing and holding (long beep) within 30 seconds. The tank symbol will stop flashing. change of gas mixture confirmed No change of gas mixture: If a diver fails to confirm the change of gas mixture, TEC will continue to calculate with the previous gas mixture and adapt the decompression calculation accordingly.
VI Diving with more than one gas mixture 7. Above MOD for 100%, missed switch: now TEC-3 gives the same decompression prognosis as TEC1. TEC-4 gives the same decompression prognosis as TEC-2. 8. Again below the MOD for 100%: TEC-3 and TEC-4 again show credit for the presence of the 100% mix in their calculations 9. Above MOD for 100%, switch carried out: TEC-3 and TEC-4 show the tank pressure in the 100% tank. The RBT agrees. TEC-2 is not receiving anymore signals from the 50% tank and shows “- - -“.
VII Dive planner VII Basis of the planning: • • • • • • selected fraction of oxygen and MOD of all active gas mixtures selected microbubble level water temperature of the most recent dive altitude range (if any) status of saturation at the time the dive planner is selected assuming a normal workload of the diver and observance of the prescribed ascent rates • assumption: changes of gas mixture are performed at the selected MOD of mixtures 2 and D.
VII Dive planner 2 Planning a decompression dive 1. Activate the dive planner for a no-stop dive ->37. 2. Wait until the desired depth appears, then switch into decompression planning by bridging contacts B and E. TEC shows the bottom time (no-stop time + 1 minute) and the appropriate decompression information or level stop data respectively. 3. asks that you set the bottom time. This is done with contacts B and +, B and – respectively.
VIII Logbook icon Diving in gauge mode MB level reduced* Ignored decompression stop* or diving in SOS mode CNS O2% Too fast ascent* Altitude range (if any) DECO Maximum depth / Lowest temp.
IX Appendix 1 Technical information Operating altitude: with decompression information: sea level up to approx. 4000 m (13120ft); w/o decompression, w/o RBT information: usable in gauge mode (at any altitude) 120m (394 ft), resolution between 0.8 m and 99.9 m: 0.1 m, >99.9 m: 1m The resolution in feet is always 1 foot Max. displayed depth: WARNING • Do not dive deeper than the limits given by the chosen fraction of oxygen (decompression sickness, oxygen toxicity).
IX Appendix IX Never touch the metal surface of the battery with bare fingers. The two battery poles must never be short circuited. Transmitter Battery CR2450 Transmitter Cap English WARNING HP port o-ring 8.73 x 1.78 mm Transmitter screws PT®KA 30 x 16 mm Transmitter cap o-ring 26.00 x 2.00 mm Procedure: To replace the battery you need a Phillips screwdriver and a clean cloth.
IX Appendix WARNING 10. The transmitter cap will only fit in one position. Check the proper position of the guide slots on the electronic support and in the transmitter cap. Slide the transmitter cap carefully back into its proper position. 11. Do not overtighten the screws! Fasten the transmitter cap with the 3 screws. 12. Mount the transmitter on the HP outlet of the first stage of the regulator and check transmission and pairing.
IX 5 FCC This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
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