THE SYSTEM

OPERATING MANUAL

English

Digital Pressure Gauge

SWISS MADE BY UWATEC AG
Uwatec Digital Pressure Gauge

Attention!

This Digital Pressure Gauge is according to EN 250 a piece of safety equipment of a SCUBA. It may only be completed to a complete SCUBA with components, which passed the EU-Certification and come up to the EN 250 norm. According to the EN 250 a complete SCUBA consists at least of the following components: a) b) c) d) e) f) g) Air pressure tank(s) and tank valve(s) Regulator Safety equipment Frame or holding device for air cylinder(s) with the possibility to mount the harness Carrier device Breathing connection (face mask and mouthpiece, full face mask, or diving helmet) Instructions for use must be included
The high-pressure hose of the Digital Pressure Gauge is equipped at its connection (7/16) with a flow through reduction. According the law of technical working devises we point to the following points: Base of each use of the Digital Pressure Gauge and its component parts is the knowledge and consideration of this Manual. The Digital Pressure Gauge may only be used for the purposes mentioned in this manual or confirmed in writing by Uwatec. The Digital Pressure Gauge has to be yearly inspected (inspection-maintenance-reparation) by an educated authorised person. These inspections have to be recorded. Only original Uwatec spare parts may be used for replacements. The EN 250 Certification maximum depth is 50 m.
Important remarks concerning 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 your the Digital Pressure Gauge. Indicates information about specialities which are important to prevent a risky situation and to dive more comfortably.

Danger!

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. Acoustical confirmation (short beep) Acoustical Alarm Overview over the chapter Flashing part of the display Details of the chapter How to get into the actual part of the program How to leave the actual part of the program
The following symbols are used in the operating manual: LCD display samples

E S B P > 8 bar

Operating instruction for Manual input (Example: bridging contacts B and E). Tank pressure higher than 8 bar.

List of chapters

Introduction / Overview.6 Safety considerations / Warnings.7 Set Up Procedure Switching the unit on and off.9 Before the first dive.10 User Mode /.10 Set Up the tank pressure alarm.11 Set Up pressure and temperature unit.13 Mounting the high-pressure hose to the first stage.14 Connecting the Digital Pressure Gauge.14 Disconnecting the Digital Pressure Gauge.16 Measurement Mode. Tank Pressure Alarm Preparation for the Dive Logbook.17.18.19.19.20.21.22.23 Warranty.24 EC type-approval.25 Overview user interface.26, 27 Serial No. / Dealer address.28
Battery Warning. Maintenance and Storing Trouble Shooting. Technical Information.

Introduction / Overview

The Uwatec Digital Pressure Gauge measures the tank pressure and displays it together with the ambient temperature on the display. A high-pressure hose connects the Digital Pressure Gauge on the first stage of the diving tank. The Digital Pressure Gauge has two pressure alarm values. One is fixed at 50 bar, the other one can be set by the user between 30 and 100 bar (450-1500 psi). The Digital Pressure Gauge warns the diver optically and acoustically if the tank pressure falls short off one of these pressure alarm values. Furthermore the diver can select the units for the pressure and temperature indication. The logbook stores the original and the final tank pressure of a given dive and displays the pressure difference.
Symbols: Logbook, Set Up, Maintenance, Battery warning Contact E Contact S Tank pressure (graphically) Tank pressure alarm symbol Contact B Tank pressure (bar, psi) Temperature (C, F) Overpressure valve
Safety considerations / Warnings
Do not use the Digital Pressure Gauge, until you have carefully read all instructions and safety precautions found in this manual. Diving has many inherent risks. Even if you follow the instructions of this manual, it is still possible that you may not have enough air until the end of the dive. Unless you are fully aware of the risks and are willing to personally accept responsibility for those risks, do not use the Digital Pressure Gauge! The Digital Pressure Gauge may only be used together with compressed air. Do not use it for oxygen enriched gases. The Digital Pressure Gauge does not give any warning about a too low air reserve. Check frequently your tank pressure! Do not use on cylinders charged above the maximum working pressure. See "Technical Information" page 23. The Pressure Gauge may only be used if it is in working condition. If your diving cylinder is equipped with a reserve or J-type valve, make certain that the reserve function is in an open position for the Digital Pressure Gauge works correctly. Rubber boot and console must not cover the overpressure valve, enabling air to leave without resistance. (Hole diameter 6 mm)

There is a danger of insufficient air supply if air leaves the over pressure valve or another part of the measurement system. Start ascent immediately! The Pressure Gauge should be secured in a way that will not cause the unit to be caught or snagged whilst diving. If the maintenance symbol appears, do not continue diving with the Digital Pressure Gauge anymore. If the symbol appears during a dive: start ascending immediately! If the maintenance symbol appears, the display may be blocked without further warning. Take the unit to your authorised Uwatec Dealer for battery exchange. If CAL appears, you must not dive with the Digital Pressure Gauge any more. If the symbol appears during a dive: start ascending immediately! The display is blocked. Have the unit repaired. If the Digital Pressure Gauge fails at any time during the dive, the dive must be terminated except when a second pressure gauge is available. Retain this manual for your reference. The Digital Pressure Gauge has been exclusively made for sports diving (EN 250). It may only be used together with high-pressure hose with a flow through reduction.
Set Up Procedure Switching the unit on and off
The Digital Pressure Gauge can be switched on either by bridging the contacts B and E or if the connected tank pressure exceeds 8 bar.
After switching the unit on by bridging the contacts the display shows for a short time all segments and goes into the User Mode, which can be run through by bridging B and S as many times you want. See User Mode, page 10. P > 8 bar If the pressure (>8 bar) switches the unit on, it will switch directly into the Measurement Mode (see page 17).
The unit switches off automatically after 3 minutes if no entry has been made and the pressure is less than 8 bar. See also Overview user interface, page 26.
Set Up Procedure Before the first dive
Before the first dive the value of the tank pressure alarm and the units for the pressure and temperature indication has to be set. Without new settings the default settings will be valid.

User Mode

/ The User Mode allows to read the logbook (pressure difference, pressure at the beginning and at the end of a dive). See page 19. set the value of the user selectable tank pressure alarm. Setting can be made between 30 and 100 bar (450-1500 psi) in steps of 10 bar (150 psi). See page 11. select the unit of the pressure and temperature indication. See page 13. On page 26 and 27 a graphical overview of the user interface is shown. If the display is switched off, bridge B and E to enter into the User Mode. If the unit indicates the tank pressure (Measurement Mode), the pressure has to be reduced below 8 bar (120 psi) to enter into the User Mode. The User Mode will be left automatically after 3 minutes (switching off) or if the tank pressure exceeds 8 bar (120 psi).

Set Up Procedure

The User Mode is programmed as a loop, which can be run through by bridging B and S, as many times you want. See also overview user interface, page 26. If the User Mode is left during the setting of the tank pressure alarm or the units, the indicated value will not been taken in to account, the old setting will be kept.
Set up the tank pressure alarm
Independent of the fixed 50 bar (750 psi) pressure alarm you can enter your own tank pressure alarm value. See also page 6 and 18. The Digital Pressure Gauge has to be in the User Mode (see page 10). Bridge the contacts B and S until the symbols for the Set Up and the tank pressure alarm are indicated. The Digital Pressure Gauge displays the actually set value of the tank pressure alarm. The default value of the user selectable tank pressure alarm is 50 bar (750 psi). If you don`t want to change the indicated valve, bridge the contacts B and S. If you want to change the indicated value, bridge B and E. The value of the tank pressure alarm starts flashing.
The value of the tank pressure alarm should not be selected lower than 50 bar. Lower values should only be selected if special precautions have been taken. If a low value of the tank pressure alarm has been selected, the alarm may be activated to late. Serious injury or death from not having enough air may occur. Select the value of the tank pressure alarm high enough! Overview set up tank pressure alarm Each bridging of the contacts B and S increases the value of the tank pressure alarm by 10 bar (150 psi). When the pressure alarm setting reaches 100 bar (1500 psi) the next contact of B, S will loop the alarm setting to 30 bar (450 psi). Bridging the contacts B and E confirms the actual displayed value as the new tank pressure alarm and the displayed alarm value stops flashing. If the measured pressure falls short of this value, the Digital Pressure Gauge activates the tank pressure alarm.
Set Up Procedure Set Up pressure and temperature unit
until The Digital Pressure Gauge has to be in the User Mode (see page 10). Bridge the contacts B and S until the symbol for the Set Up Mode and both the pressure and temperature units appear.

The Digital Pressure Gauge shows the actual combination of pressure and temperature units. If you don`t want to change the displayed units, bridge the contacts B and S. Overview units To change one or both units, bridge B and E. The displayed units start flashing. The display shows the next combination of units after bridging the contacts B and S. Bridge these contacts until the display shows the units of your choice. Bridging B and E confirms the displayed units as the new combination. The displayed units stop flashing.
Set Up Procedure Mounting the high-pressure hose to the first stage
Adaptor The high-pressure hose is mounted on the high-pressure outlet (HP-outlet) of the first stage of the regulator. 1. Mount the high-pressure hose on the HP-outlet. If the threads do not match, you can obtain an adapter from your diving retailer.
2. Tighten the connection with a matching wrench.
Connecting the Digital Pressure Gauge
Make sure that the tank valve is closed and the regulator is depressurised. 1. Place the bayonet ring of the high-pressure hose on the connecting part of the Digital Pressure Gauge in such a manner that the guiding pins of the bayonet ring grip into the guides provided.
2. Turn the bayonet ring to the right until it reaches the stop and then let go of the ring. Make sure that the bayonet ring springs back a few millimeters. Check the correctness of the connection by forcefully pressing and pulling the hose. The bayonet ring must have a range of spring of a few millimeters. 3. Open the tank valve and check the tightness of the connections.
Check tank pressure before every dive.
If the pressure exceeds 8 bar the Digital Pressure Gauge switches automatically to the Measurement Mode (see page 17).
Set Up Procedure Disconnecting the Digital Pressure Gauge
After diving, the Digital Pressure Gauge can be disconnected. Make sure that the tank valve is closed and the regulator is depressurised. The Digital Pressure Gauge cannot be disconnected under pressure.
Never try to disconnect the Digital Pressure Gauge under pressure.

Measurement Mode

In the Measurement Mode the Digital Pressure Gauge indicates the tank pressure (numerically and graphically) and the temperature. The Digital Pressure Gauge activates an optical and acoustical alarm if the tank pressure goes below the fixed 50 bar alarm or below the user selected alarm pressure value.

Independent of the actual mode of the Digital Pressure Gauge, it activates the Measurement Mode as soon the connected pressure exceeds 8 bar (120 psi).

P > 8 bar

P < 8 bar
If the pressure falls short of 8 bar (120 psi), the unit switches to the User Mode.
The number of bars shown in the tank symbol correlates to the relation between the actual pressure and 200 respectively 300 bar, depending on the measured maximum pressure. If the maximum pressure exceeds 250 bar (3600 psi) the number of bars is displayed as a proportion of 300 bar (4500 psi). With a maximum pressure of less than 250 bar (3600 psi) the number of bars is proportional to 200 bar (3000 psi).

Tank Pressure Alarm

, In the Measurement Mode the unit alarms the diver if the pressure falls short of the set value of the tank pressure alarm or 50 bar (750 psi). The alarms, given acoustically and graphically, warn about the danger of not having enough air until the end of the dive. The alarms are given on the surface and under water. If the pressure falls short of the set value of the tank pressure alarm or 50 bar (750 psi) the symbol gets indicated and an acoustic alarm signal is given. If the pressure falls under the selected value of the tank pressure alarm, the unit repeats after every 5 bar (50 psi) pressure reduction the acoustical alarm signal.
Start ascending immediately if an optical or acoustical tank pressure alarm is given. Even if the Digital Pressure Gauge gives no tank pressure alarm, the air reserve can be used up before the end of the dive. Frequently check the tank pressure and start ascending early enough. If you don`t start ascending after a tank pressure alarm, you may not have enough air until the end of the dive. If the pressure is less than 8 bar, there is no warning given by the Digital Pressure Gauge.

Preparation for the Dive

Make sure before each dive that the Digital Pressure Gauge is correctly mounted (see page 14) selected value of the tank pressure alarm is high enough (see page 11)
If the air reserve is to low for your dive, it may result in serious injury or death. Check the tank pressure before each dive. Never dive with leaky equipment! Check the connections and the instruments against leaking parts.

Logbook

The logbook stores the tank pressure at the beginning and the end of the last dive and displays the pressure difference. The Digital Pressure Gauge has to be in the User Mode (see page 10). Bridge the contacts B and S until the Logbook symbol appears. Pressure difference: Beginning/end
If the tank pressure exceeds 8 bar, the unit switches to the Measurement Mode. After 3 minutes in the Logbook Mode, it switches off automatically. Pressure at the beginning The User Mode is programmed as a loop that can be run through by bridging B and S, as many times you want. See overview user interface page 26. The Logbook stores the pressure data of a dive if the pressure has been at least during 3 minutes higher than 8 bar and the pressure reduction between the beginning and the end was at least 10 bar. Pressure at the end The Logbook of a new unit contains test values.

Battery Warning

The battery has to be replaced if the battery symbol unit to an authorised Uwatec retailer. , appears. Bring the
If the maintenance symbol appears, do not continue diving with the Digital Pressure Gauge anymore. If the symbol appears during a dive: start ascending immediately! If the maintenance symbol appears, the display may be blocked without further warning. Take the unit to your authorised Uwatec Dealer for battery exchange.

Maintenance and Storing

Depressurising the Digital Pressure Gauge after use reduces the battery consumption. Protect the unit from impacts and intensive sun and heat. Do not rest heavy objects on the unit. After diving in salt water rinse the unit with freshwater. Dry the instrument thoroughly after use, taking care not to scratch the lens. Store the unit in a cool, dark and dry location. To replace the battery if the battery or service symbol is shown. Take the unit to an authorised Uwatec retailer. Do not clean the unit with liquids containing solvents. Liquids containing solvents are destroying the Digital Pressure Gauge. Use only fresh water and soap water to cleaning the unit.

Trouble Shooting

No Pressure The Digital Pressure Gauge displays no P and gives a short beep is submerged and the connected pressure is lower than 8 bar. , if it
Check the connection of the Digital Pressure Gauge, the tank valve and the tank pressure.
Battery Voltage to low If CAL appears, you must not dive with the Digital Pressure Gauge anymore. If the symbol appears during a dive: start ascending immediately! The display is blocked. Have the unit repaired. CAL appears if the battery has not been replaced even the battery- and service symbols have been displayed. The display is blocked. Have the unit repaired.

Technical Information

Optical and acoustical alarms Maximum Working Pressure: 300 bar (4350 psi) Maximum depth: 80 m (260 ft) Maximum depth for EN250 Certification: 50 m (164 ft) Operating temperature: -20C to +50C (-4F to +122F) Storage temperature: -30C to +70C (-22F to +158F) Resolution of the numerically pressure indication: 1 bar (10 psi) Display update: each 4 sec. Tank pressure alarm: 50 bar (750 psi), fixed User selectable alarm pressure: Range: 30-100 bar (450-1500 psi) Steps: 10 bar (150 psi)
Battery lifetime: 10 years Size: like standard pressure gauges

Warranty

Please pay attention to the following remarks on warranty claims: Recognition of warranty The warranty only covers units which have been provably bought from an authorised retailer or from the manufacturer. The manufacturer will repair all defects which are provably traceable to defects of material or faults in production. The warranty covers the repair of the unit free of charge, the replacement of faulty parts or the entire Digital Pressure Gauge, respectively. Uwatec reserves the right to determine the merits of the warranty claim and to determine whether the unit will be repaired or replaced. Excluded are faults or defects due to: excessive wear and tear disassembly of the instrument. exterior influences, e.g. transport damage, impact, diving accidents damage due to bumping and hitting, influences of weather or other phenomena Warranty period and claim The warranty is given by a period of 12 months. Repairs or replacements during the warranty period do not increase the warranty period. In order to put forward a warranty claim, send the unit together with a dated receipt of the purchase to your authorised retailer or an authorised servicing point. The manufacturer is not obligated to accept extensions of the warranty granted by national importers. Please confirm that you have read and understood the complete manual:

Place: ___________________ Date: ______________ Signature: _____________________

EC type-approval

SCUBAPRO UWATEC Via Latiro 21/C Sestri Levante (GE), Italy as an authorised agent situated in the EU Community of UWATEC AG Engenbhl Hallwil, Switzerland confirms herewith: The Pressure Gauge described in this manual corresponds with the unit for which RINA Spa, Gruppo REGISTRO ITALIANO NAVALE, Via Corsica, GENOVA, Italy gave the EC type-examination certificate No. CCE2832099.
EN 250 Directive: 89 / 686 / EEC CE 0474
Overview user interface User Mode Logbook Set Up
Measurment Mode (see page 27)

Logbook Set Up the Units

Differential Pressure
Set Up the Alarm Pressure Pressure at the beginning End Pressure
Overview user interface Measurement Mode

Display off

P > 8 bar Measurement Mode
P < 50 bar or P < P Alarm

User Mode (see page 26)

Serial No. / Dealer address
Serial No. of your Instrument: Dealer address:

(Dealer to affix stamp)

Copyright 1999 by Uwatec Switzerland
Printed in Switzerland 1/00

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.

I UWATEC Smart dive computers
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.
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.

II 1 2

III Diving with Smart TEC __________________________________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 __________________________________17 __________________________________17 __________________________________17
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
6 Diving in mountain lakes 6.1 Altitude ranges 6.2 Prohibited altitude 6.3 Decompression dives in mountain lakes
__________________________________25 __________________________________25 __________________________________25 __________________________________25 __________________________________26 __________________________________28 __________________________________28 __________________________________29 __________________________________29 __________________________________29

IV Gauge mode V 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
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 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
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 TEC Package. Infrared interfaces are available in PC stores. A list of recommended interfaces is available on the UWATEC homepage (www.uwatec.com).

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 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.

Temperature

O2 Mix Do not fly icon
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 % 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.

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.
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
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.
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.
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 regulators first stage before the first dive.

Procedure:

Use air and Nitrox components in accordance with the law of the country.

(Adaptor)

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.

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.
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.

5.4 Microbubble warning Through repetitive dives microbubbles accumulate in the lungs if the surface interval is not long enough. Ignoring decompression stops or ascending at an excessive rate can also lead to microbubbles in tissues. In order to reduce the risk of decompression sickness for repetitive dives, the surface interval should be planned long enough. If TEC calculates that the formation of microbubbles occurs during the surface interval, it will advise a diver to extend the surface interval via the microbubble warning. The duration of the microbubble warMicrobubble ning is visible by entering the dive planner -> 37. warning

Desaturation time

If the <microbubble warning (NO DIVE)> is visible during the surface interval, the diver should not undertake another dive.
If the dive is made in spite of the microbubble warning, the diver must cope with a clearly shorter no-stop time or an extension of decompression. Also, the duration of the microbubble warning at the end of the dive can increase considerably.
6 Diving in mountain lakes

6.1 Altitude ranges

Altitude range 1 Desaturation time Adaptation time Altitude ranges
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. If the dive starts within this adaptation time, TEC treats it as a repetitive dive, since the body is offgassing. Altitude is divided into five ranges, which are influenced by barometric pressure. That is why the defined altitude ranges overlap on their fringes. If a mountain lake is reached, the altitude range is indicated at the surface, in the logbook and in the dive planner by a stylised mountain filled with one or more of 4 segments representing the 4 ranges. Sea level to an altitude of approximately 1000m (3300 feet) is not Switching at approx. indicated. In the following No deco data 610 mbar diagram, you can see the gauge mode 4000 m 8.85 psi approximate breakdown of 13120 ft the altitude ranges:

Microbubble accumulation at the end of dive

Depth Time

3m/10ft 6m/20ft 9m/30ft 12m/40ft 15m/50ft

NO STOP NO STOP NO STOP

Decompression values Level stop values Decompression obligation, ->31

LEVELSTOP

DECO LEVELSTOP
V UWATEC Smart dive computers

Stop depth

2 Terminology
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). 2.1 Display during microbubble (MB) no-stop phase
MB level activated Level L2 is active
MB no-stop phase Dive phase during which surfacing is possible without MB level stop. Time

Level stop phase

Dive time

MB no-stop time

MB no-stop time Remaining time at a respective depth allowing ascent without level stop.

29.9 m

2.2 Display during level stop phase
Total ascent time including level stops Time Depth
Total ascent time (14 min)
3m/10ft 6m/20ft 9m/30ft Lowest level stop depth 3 min Level stop duration
Level stop depth The deepest level stop is displayed. Level stop duration The duration of a level stop at a given level stop depth is displayed.
MB no-stop phase Level stop phase To complete the dive without being reduced to a lower MB level all requested level stops must be observed.
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 + or 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. TEC will display the symbol to confirm that an MB level beyond L0 (L1-L5) has been chosen. During the dive the MB level is shown by pressing briefly. If however a level stop is ignored, the new MB level is permanently shown (->31). MB levels have an influence on the dive planner.
4 Functions during the dive with microbubble levels
4.1 Level stop information Microbubble (MB) no-stop time While diving with MB levels L1 to L5 TEC will display the MB no-stop time instead of the ordinary no-stop time. Within the MB no-stop time no level stops are required. The arrow NO STOP and the MB level symbol are visible. The remaining MB no-stop time is shown in minutes. Information and alarms for MB no-stop time and ordinary nostop time are the same (->22). Regardless of the MB level, we generally recommend to perform a slow ascent during the last few metres / feet.
MB no-stop time Level stop Level stop icon
On entering the level stop phase, the arrow NO STOP disappears and the arrow LEVELSTOP appears. The LEVELSTOP arrow flashes for 8 seconds and an audible attention beep goes off. To complete the dive without being reduced to a lower MB level, all requested level stops must be observed. To the right of the LEVELSTOP arrow, the deepest level stop is displayed in metres/feet. The display <3m 2:> (<10ft 2:>) means that a level stop of 2 minutes at a depth of 3 metres (10ft) has to be observed. When a level stop obligation is finished, the next higher level stop if present is displayed. When all level stops have been observed, the arrow LEVELSTOP extinguishes and the arrow NO STOP reappears. The indication of time shows the MB no-stop time again.

Deepest level stop depth Level stop duration Total ascent time
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. To complete the dive without being reduced to a lower MB level, you must descend to the prescribed depth immediately! The warning "microbubble level reduced" is activated if the diver ascends more than 1.5m (5ft) above the required level stop. TEC reduces the microbubble level, an attention beep* goes off and for the rest of the dive the new MB level is indicated in the position of the maximum depth. The level stop for the reduced MB level is now displayed. To complete the dive without being further reduced to an even lower MB level the new level stop must be observed.
Level stop ignored Microbubble level reduced 4 sec

New microbubble level

* Attention beeps can be suppressed via SmartTRAK.
4.2 Total time of ascent TEC displays the level stop information and the total time of ascent. This includes the time of ascent as well as all level stops.
Total ascent time 4.3 Decompression obligation Decompression obligation
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.
Avoid decompression dives when diving with MB levels.
Level stop information 4 sec
TEC calculates and displays level stops to reduce microbubble formation, but it also calculates the diver's decompression data. If decompression stops become obligatory, the DECO symbol will be displayed. The total ascent time will now also contain a decompression stop.
You are close to entering decompression: At the beginning of a decompression phase an attention beep goes off and the DECO symbol flashes for 8 seconds. In order to prevent a dive with long decompression stops it is recommended that you ascend a few metres/feet on seeing this message.
4.4 Level stop and deco stop
L0 3m/10ft Deco stop duration Level stop duration

Submerging again after a change of gas mixture:
Examples for clarification of RBT and change of gas mixtures The following figures show a dive profile and the display of various TECs in the following settings: TEC-3: set to 21% (tank 1) and 100% (tank D) TEC-1: set to 21% (tank 1) TEC-4: set to 21% (tank 1), 50% (tank 2) and TEC-2: set to 21% (tank 1) and 50% (tank D) 100% (tank D) 1. Start of ascent: the TECs have different decompression prognosis, indicating the benefit of the travel and/or decompression gases. However, the RBT is the same for all four, as it relates to tank 1 only. It indicates that starting the ascent within the next three minutes the diver will have enough gas for the ascent and the decompression obligations shown on TEC-1. At RBT=3 or less, the ascent arrow is showing: TEC suggests that the diver starts the ascent. 2. Slightly below MOD for 50% mix (MOD=22m): The slow ascent has caused significant build-up of decompression obligations. There is a marked difference in ascent times, indicating the benefit of decompressing at high oxygen percentage. 3. Above MOD for 50%, missed switch: TEC-2 adjusts its decompression prognosis to be same as TEC1. TEC-4 adjusts its decompression prognosis to be the same as TEC-3. 4. Again below MOD for 50%: TEC-2 and TEC-4 once again show credit for the presence of the 50% mix in their calculations. 5. Above MOD for 50%, switch carried out: TEC-2 and TEC-4 show the tank pressure in the 50% tank. The RBT agrees because also in TEC-4 it considers the 50% tank will be used to finish the dive. TEC-1 and TEC-3 are not receiving any signals from the transmitter on the 21% tank and show - - -. 6. Slightly below the MOD for 100% mix (MOD=6m): During the slow ascent from 22m, TEC-2 using 50% oxygen has caught up on the decompression schedule of TEC-3, which is still using 21% oxygen but gives credit for the upcoming switch to 100% oxygen.
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 - - -. However, the slow ascent and delayed switch to 100% has caused the decompression prognosis to be shorter on TEC-2 than TEC-3.

TEC-1 21% tank 1

CNS O2% CNS O2% CNS O2%
TEC-2 21% tank 1 50% tank D TEC-3 21% tank 1 100% tank D
TEC-4 21% tank 1 50% tank 2 100% tank D

Depth (m)

0 Time (min) TEC-1 21% tank 1

VII Dive planner

TEC has a dive planner which allows the planning of no-stop dives as well as decompression dives with freely determinable surface intervals and with up to three different gas mixtures. 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. If two or more divers using computers are planning a dive, planning for all divers has to be based on the dive computer showing the shortest no-stop times. Failure to do this may lead to serious injury or death from decompression sickness.

3 Conversion of tank pressure
Tank pressure indicated may differ from the information given by a manometer/pressure gauge. TEC displays pressure always converted to a temperature of 20C / 68F, whereas the mechanical pressure gauge displays the current pressure influenced by temperature. The figure below allows you to compare the information given by a conventional pressure gauge and by TEC at six different temperatures. bar psi Display pressure gauge 230 bar 3335 psi Display Smart TEC
35o C 95o F 30o C 86o F 20o C 10o C 5o C 0o C 68o F 50o F 41o F 32o F

4 Warranty

The warranty only covers dive computers which have been bought from an authorised SCUBAPRO UWATEC retailer. The warranty is given for a period of 2 years. Repairs or replacements during the warranty period do not increase the warranty period. In order to put forward a warranty claim: send the dive computer together with a dated receipt of the purchase to your authorised retailer or an authorised servicing point. UWATEC reserves the right to determine the merits of a warranty claim and to determine whether the computer will be repaired or replaced.
Excluded are faults or defects due to: excessive wear and tear; exterior influences, e.g. transport damage, damage due to bumping and hitting, influences of weather or other natural phenomena; servicing, repairs or the opening of the dive computer by anybody not authorised by the manufacturer. This especially concerns the change of battery; pressure tests which do not take place in water; diving accidents; improper placement of the transmitter cap.
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.

6 Index

Active backlight___________________________11 Ascent rate________________________15, 17, 19 Battery alarm _____________________________17 Battery capacity, Checking the ____________10 Battery lifetime ___________________________40 Beep, Switch off the _____________________17 Changing the gas mixture ______________26, 34 CNS O2 ________________2, 3, 15, 16, 17, 21, 39 Deco data during decompression phase ______15 Deco data during no-stop phase ____________15 Decompression stop, Ignored __________17, 23 Depth, current ____________________________19 Desaturation time _________________________24 Dive ____________________________________15 Dive planner _____________________________37 Dive time ________________________________19 Dive, end of a dive ________________________24 Fly, "no-fly time" ______________________10, 24 Gas mixture, Setting _____________________18 Gauge mode _____________________________26 Light ____________________________________11 Logbook _________________________________39 Maintenance _____________________________40 Maximum depth_______________________19, 39 Microbubbles_____________________________28 Microbubbles, Warning of ____________24, 37 Mountain lakes, Diving in ____________25, 39 Mounting the transmitter to the first stage ___12 Nitrox ______________________________16

iX UWATEC Smart dive computers
No-stop time ______________________15, 22, 28 O2% mix, Set up ________________________18 O2 fraction ________________________15, 16, 18 O2 partial pressure__________________16, 17, 20 O2 partial pressure, maximum ___________16, 20 O2 toxicity __________________15, 16, 17, 21, 39 Operating TEC ________________________4, 8, 9 Oxygen, see "O2" PC, transfer to PC (logbook) ________________39 ppO2, see O2 partial pressure Premix, setting the gas mixture______________18 RBT ______________________________15, 17, 22 Safety stop timer__________________________23 Setting the MOD ______________________18, 33 SmartTRAK ___________________8, 9, 16, 17, 39 SOS mode _______________________________11 Stopwatch _______________________________27 Surface interval________________________37, 39 Switching off gas mixtures__________________34 System ___________________________________8 Tank pressure ____________________________21 Technical information ______________________40 Transmitter _________________________8, 12, 40 Warnings ________________________________17 Workload _______________________________21 Workload, Increased ____________________ 21
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