Suunto VYTEC DS manual

SUUNTO VYTEC DS EN INSTRUCTION MANUAL[...]

QUICK REFERENCE GUIDE[...]

1 DEFINITION OF W ARNINGS, CAUTIONS AND NOTES Throughout this manual, special references are made when deemed important. Three classi fi cations are used to separate these references by their order of importance. W ARNING - is used in connection with a procedure or situation that may result in serious injury or death. CAUTION - is used in connecti[...]

2 PrEN 13319 PrEN 13319 ”Diving accessories – Depth gauges and combined depth and time measuring devices – Functional and safety requirements, test methods” is a European diving depth gauge standard draft. The VYTEC is designed to comply with this draft standard. ISO 9001 SUUNTO Oy’ s Quality Assurance System is certi fi ed by Det Norske[...]

3 W ARNING! THERE IS AL WA YS A RISK OF DECOMPRESSION ILLNESS (DCI) FOR ANY DIVE PROFILE EVEN IF YOU FOLLOW THE DIVE PLAN PRESCRIBED BY DIVE T ABLES OR A DIVE COMPUTER. NO PRO- CEDURE, DIVE COMPUTER OR DIVE T ABLE WILL PREVENT THE POSS IBILITY OF DCI OR OXYGEN TOXICITY! An individual’ s physi- ological make up can vary from day to day . The dive [...]

4 W ARNING! YOU ARE ADVISED TO A VOID FL YING ANY TIME THE COMPUTER COUNTS DOWN THE NO-FL YING TIME. AL WA YS ACTIV A TE THE COMPUTER T O CHECK THE REMAINING NO-FL Y TIME PRIOR TO FL YING! The computer goes into the stand-by display auto matically 5 minutes after the dive has ended. The stand-by display shuts of f after two hours. Flying or traveli[...]

5 W ARNING! THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL PER- CENT AGE V ALUES OF OXYGEN CONCENTRA TION. DO NOT ROUND UP FRACTIONAL PERCENT AGES! For example, 31.8% oxygen should be entered as 31%. Rounding up will cause nitrogen percentages to be understated and will affect decompression calcu- lations. If there is a desire to adjust the computer [...]

6 T ABLE OF CONTENTS W ARNINGS! .................................................................................................... 2 1. INTRODUCTION ......................................................................................... 8 1.1. SAFETY PRECAUTIONS ........................................................................ 9 1.1.1. E[...]

7 3.8.1. Altitude Adjustment ...................................................................... 40 3.8.2. Personal Adjustment .................................................................... 40 3.9. ERROR CONDITIONS ........................................................................... 42 4. MENU BASED MODES ...........................[...]

8 1. INTRODUCTION Congratulations on your purchase of the SUUNTO VYTEC advanced dive computer . The Vytec builds on the Suunto tradition of delivering feature-rich dive computers. The Suunto V ytec provides many new and enhanced features that cannot be found in other dive computers, such as gas switching and optional wireless air-integration. Push [...]

9 In order to optimize how to respond to different added risk situations an additional category of stop, referred to as a Mandatory Safety Stop, has been introduced. Also a countdown for the Recommended Safety Stop is included. The combination of stop types will depend on the speci fi c dive situation. T o get the most from the safety bene fi ts [...]

10 1.1.2. Dive Computer Limitations While the dive computer is based on current decompression research and technology , you must realize that the computer cannot monitor the actual physiological functions of an individual diver . All decompression schedules currently known to the authors, including the U.S. Navy T ables, are based on theoretical ma[...]

11 The timekeeping display is the default display of the instrument (Fig. 2.1.). If a button is not pressed within 5 minutes, the dive com puter beeps and returns to the timekeeping display automatically (except in Diving and Simula- tion modes). The timekeeping display shuts off after two hours, but pressing the PLAN or TIME button activates it. M[...]

12 Press the SMART (MODE) button • T o activate the dive computer . • T o change from the Surface Mode to the menu based modes. • T o select, con fi rm or quit a submode (short press). • T o immediately exit any submode to the Surface Mode (long press). • T o activate the electroluminescent backlight (in the Surface Mode hold down the mo[...]

13 2.4. WIRELESS CYLINDER PRESSURE TRANSMISSION The V ytec can be used together with an optional wireless cylinder pressure transmitter that can easily be attached to the high-pres- sure port of the regulator (Fig. 2.5). By using the transmitter the diver can bene fi t from cylin- der pressure and remaining air time data. In order to use the trans[...]

14 2.4.2. Pairing and Code Selection In order to receive wireless data the transmitter and the V ytec wrist unit need to be paired. During the pairing procedure the transmitter and wrist unit select a common transmission code. The transmitter turns on when the pressure exceeds 15bar [218 psi] and it then starts sending pressure data together with a[...]

15 The selected transmission code can later be veri fi ed via the alternative display , by pressing the “TIME” button twice. If needed, the stored code can be manually erased in this display by pressing the “PLAN” (up) button and then pressing “MODE” (select). The V ytec will now erase the stored code and start displaying “SETC” al[...]

16 In case the transmitter battery is running low , a low battery warning “LOBT” will be transmitted and displayed intermittently with the pressure reading on the V ytec (Fig.2.6 d). If the dive is started without that the V ytec and the transmitter have been properly paired, the V ytec will indicate that no cylinder data is available by displa[...]

17 QUIT 3. DIVING WITH THE VYTEC This section contains instructions on how to operate the dive computer and interpret its displays. Y ou will fi nd that this dive computer is easy to use and read. Each display shows only the data relevant to that speci fi c diving situation. 3.1. BEFORE DIVING 3.1.1. Activation and Prechecks The dive computer wil[...]

18 • the instrument displays correct units of measurement (Metric/Imperial) • the instrument displays correct temperature and depth (0.0 m [0 ft]) • the buzzer beeps IIf the optional wireless pressure trans-mitter is used (see chapter 2.4. Wireless pressure transmission) ensure that: • the pressure transmitter has been - properly attached a[...]

19 The Battery Power Indicator can always be seen when the Dive Mode is activated. The electroluminescent backlight will be on during the battery check. The following T able and Figure show the various warning levels. T ABLE 3.1. BA TTERY POWER INDICA TOR Display Operation Figure 3.2 BA T + 4 segments + OK Normal, full battery . a BA T + 3 segments[...]

20 If the battery symbol is displayed in the Surface mode or if the display is faded or weak, the battery may be too low to operate the dive computer and battery replacement is recommended. NOTE! For safety reasons the backlight cannot be activated when the low battery warning is indicated by the battery symbol. 3.1.2.2. Wireless T ransmitter Batte[...]

21 The surface interval must be at least 5 minutes for a dive to be considered a repetitive dive. Otherwise, it is considered a continuation of the same dive. The dive number will not change and the dive time will continue, where it left off (see also section 3.6.2. “Dive Numbering”). 3.1.4. User De fi nable Functions and Alarms This V ytec ha[...]

22 3.2.2. Mandatory Safety Stop When the ascent rate exceeds 12 meters/min [40 ft] momentarily or 10 meters/min [33ft] con- tinuously the micro-bubble build-up is predicted to be more than allowed for in the decompres- sion model. The Suunto RGBM calculation model responds to this by adding a Mandatory Safety Stop to the dive. The time of this Mand[...]

23 3.2.3. Deep Stops The Suunto V ytec allows the user to choose a deep stop algorithm instead or the traditional recommended safety stop. Deep Stops are decompression stops that occur deeper than traditional stops, with the purpose of minimizing microbubble formation and excitation. The Suunto RGBM model calculates deep stop iteratively , placing [...]

24 • the Personal Adjustment setting on the left side of the center window with a diver symbol and + signs (P0, P1, or P2) (see T able 3.5.) • the Diver Attention Symbol if attenuated RGBM has been set (see T able 3.3.) • blinking Diver Attention Symbol if surface interval should be prolonged (see T able 3.3.) In addition with the optional wi[...]

25 shown in the left center window of the display . The calculation is always based on the actual pressure drop in your cylinder and will automatically adapt to your cylinder size and current air consumption. The change in your air consumption will be based on constant one second interval pressure measurements over 30 - 60 second pe riods. An incre[...]

26 Red Zone – As all of the bars appear (red zone), your no-decompression stop time has become zero and your dive has become a decompression stop dive (for more information see section 3.3.6. “Decompression dives”). 3.3.5. Ascent Rate Indicator The ascent rate is shown graphically along the right side of the display as follows: T ABLE 3.2. AS[...]

27 3.3.6. Safety Stops and Deep Stops If Deep Stops are not used a 3 minute Recom- mended Safety Stop is prompted after every dive to 10m depth ( fi g. 3.1 1). Continuous ascent rate violations will result in Mandatory Safety Stops ( fi g. 3.14). When enabled, Deep stops are calculated. The length of the recommended Deep Stop is indicated in seco[...]

28 plus • the time needed to reach the surface after the ceiling and safety stops have been completed. W ARNING! YOUR ACTUAL ASCENT TIME MA Y BE LONGER THAN DISPLA YED BY THE INSTRUMENT! The ascent time will increase if you: • remain at depth • ascend slower than 10 m/min [33 ft/min] or • make your decompression stop deeper than at the ceil[...]

29 lift you above the ceiling. Suunto recommends that decompression takes place deeper than 4 m [13 ft], even if the indicated ceiling is shallower . NOTE! It will take more time and more air to decompress below the ceil- ing than at the ceiling. W ARNING! NEVER ASCEND ABOVE THE CEILING! Y ou must not ascend above the ceiling during your decompress[...]

30 DISPLA Y ABOVE THE CEILING If you ascend above the ceiling during a de- compression stop, a downward pointing arrow will appear and a continuous beeping starts (Fig. 3.19.). In addition, an error warning Er reminds you that you have only three minutes to correct the situation. Y ou must immediately descend to or below the ceiling. If you continu[...]

31 on Nitrox use result in longer no-decompression times and shallower maximum depths than div- ing with air . As a safety precaution the oxygen calculations in the computer are made with an oxygen per- centage of 1% + setO 2 % . When the dive computer is set in Nitrox mode the Dive Planning and Dive Simulation modes both calculate with the O 2 % a[...]

32 label NITROX, is shown after activation. In Dive Planning mode the Nitrox display shows (Fig. 3.21.): • the oxygen percentage, labeled with O 2 %, is shown in the left side of the center window • the set oxygen partial pressure limit, labeled with PO 2 , is shown in the upper right display • the maximum allowed depth based on the set oxyge[...]

33 After fi ve seconds the display will automatically revert to the original display . 3.4.3. Oxygen Limit Fraction (OLF) In addition to tracking the diver ’s exposure to nitrogen, the instrument tracks the exposure to oxygen, if set to Nitrox mode. These calculations are treated as entirely separate functions. The dive computer calculates separ[...]

34 set maximum oxygen partial pressure. T issue calculation during dive is based on the mix you have selected. The V ytec allows gas change to enabled gas mixes during the dive. Gas change is made by the following procedure: • Press the MODE button until the V ytec starts to show blinking “MIX” instead of temperature/cylinder pressure in the [...]

35 T ank pressure and ascent rate indicator are also displayed during the dive (Fig. 3.28.). Remaining Air Time, temperature and current time are shown in the alternative display when the TIME button is pressed. NOTE! If you dive with the Gauge mode, it is not possible to change between the modes within 48 hours. 3.6. A T THE SURF ACE 3.6.1. Surfac[...]

36 Or when the TIME button is pressed once or twice: • the current time, shown as TIME instead of the DIVE TIME • the current temperature with °C for Centigrade [or °F for Fahrenheit] • the surface time in hours and minutes (separated by a colon), telling the duration of the present surface interval (Fig. 3.30.) • the desaturation/no- fl[...]

37 in the Planning Mode will increment to the next higher number if another dive is made. T ABLE 3.3. WARNING SYMBOLS 3.6.3. Flying After Diving The no- fl ying time is shown in the center window next to the airplane image. Flying or travelling to a higher altitude should be avoided at any time the computer counts down the no- fl ying time. NOTE![...]

38 • If a diver had less than 2 hours total accumulated dive time in the last 48 hours, then a 12 hour surface interval before fl ying is recommended. • Following any dive that required a decompression stop, fl ying should be delayed for at least 24 hours, and if possible, for 48 hours. • Suunto recommends that fl ying is avoided until all[...]

39 Y ou are able to preset alarms before the actual dive. The user program- mable alarms can be set for maximum depth, dive time and time. The alarms activate when: • The preset maximum depth is reached • continuous beep series for 24 seconds or until any button is pressed. • the maximum depth blinks as long as the present depth value exceeds[...]

40 3.8. HIGH AL TITUDE DIVES AND PERSONAL ADJUSTMENT The dive computer can be adjusted both for diving at altitude and also to increase the conservatism of the mathematical nitrogen model. 3.8.1. Altitude Adjustment When programming the instrument for the correct altitude, you need to select the correct Altitude Mode according to T able 3.4. The di[...]

41 • cold exposure - water temperature less than 20 °C [68 °F] • the diver is below average physical fi tness level • diver fatigue • diver dehydration • previous history of DCI • stress • obesity The Personal Adjustment Mode is indicated by a diver symbol and plus signs (P0 = a diver , P1 = diver +, or P2 = diver ++). Section 4.3.[...]

42 mode (RGB50). See T able 3.6. T o advise the diver that attenuated RGBM has been set, the Diver Attention Symbol is constantly displayed (T able 3.3.) T ABLE 3.6. RGBM MODEL SETTINGS 3.9. ERROR CONDITIONS The dive computer has warning indicators that alert the user to react to certain situations that would signi fi cantly increase the risk of D[...]

43 4. MENU BASED MODES T o make yourself familiar with the menu based functions, please use your Quick Re ference Guide supplied with the V ytec to gether with the information in this chapter . The main menu based functions are grouped under 1) memory , 2) dive simulation and 3) setting modes. THE USE OF THE MENU BASED FUNCTIONS 1. Activate the men[...]

44 EXIT / QUIT! By pressing the SMART button for more than 1 second, any menu based function or submode can be quit and the dive computer will return directly to the Dive Mode. THE LIST OF THE MENU BASED MODES 1. MEMORIES AND DA T A TRANSFER [1 MEMOR Y] 1. Logbook and Dive Pro fi le Memory [1 LOGBOOK] 2. Dive History Memory [2 HIST ORY] 3. Data T [...]

45 4.1. MEMORIES AND DA T A TRANSFER [1 MEMOR Y] The memory options (Fig. 4.5.) for this dive computer include the combined Logbook and Dive Pro fi le Memory (Fig. 4.6. – 4.12.), Dive History Memory (Fig. 4.13. – 4.14.) and the Data T ransfer and PC-Interface functions (Fig. 4.15.). The dive entry time and date is registered in the Logbook mem[...]

46 When Select is displayed next to the mode but- ton the scroll buttons will scroll through the four pages of the selected dive. The END text is displayed between the oldest and most recent dive. (Fig. 4.12.) Note that chronological sequence in the log- book is determined by the date, not by the dive number . The following information will be show[...]

47 Page III (Fig. 4.9.) • dive number in the dive series • average depth • surface interval time before the dive • DP describing Cylinder pressure drop during the dive (if wireless trans - mission enabled (HP on)). Page IV (Fig. 4.10.) • dive number in the dive series • the pro fi le of the dive, automatic scrolling during which: • l[...]

48 DIVE PROFILE MEMORY [PROF] The scrolling of the pro fi le will start automati- cally when the Logbook page IV (PROF) is entered. With the default setting, the dive pro fi le is re- corded and displayed in 20-second increments with each display being shown for about three seconds. The depths shown are the maximum values of each interval. Pressi[...]

49 4.1.3. Data T ransfer and PC-Interface [3 TR-PC] The instrument can be connected to an IBM compatible personal com- puter (PC), using the optional PC-Interface and software. With the PC- Interface unit, dive data from the dive computer can be downloaded to a PC. The PC software can be used for educational and demonstration purposes, for planning[...]

50 NOTE! While in the Data T ransfer mode, the connector/water contacts are used only for the data transfer . The Dive Mode IS NOT automati- cally activated if the contacts are submerged. After you have fi nished the data transfer, press the SMART (Quit) to exit Data T ransfer mode. If a button is not pressed or no data is trans- ferred within 5 m[...]

51 multiple gas mixes are set they will be changed as soon as allowed maximum depth is reached upon ascent and in the order of: MIX1, MIX2 and MIX3 T o enter the Dive Simulator mode select MODE- 2 SIMUL- 1 SIMDIVE (Fig. 4.17. and 4.18.). 4.2.2. Dive Planning Simulator [2 SIMPLAN] The Dive Planning Simulator mode shows you the present no-decompressi[...]

52 OK 4.3.1. Dive Parameter Settings [1 SET DIVE] T o enter the Dive Parameter Setting Mode select MODE- 3 SET - 1 SET DIVE. The Dive Parameter Setting mode has two to four op- tions depending on the dive computer mode. In Gauge mode there are two options, in Air mode three options and in Nitrox mode four options. 4.3.1.1 Altitude Adjustment, Perso[...]

53 Now you are able to select from the three alti- tude modes (Fig. 4.23.) and the three personal modes (Fig. 4.24.) and the two RGBM effect, full normal or limited attenuated, modes (Fig. 4.25.) and safety stop/deepstop 1 or 2 minutes (Fig. 4.25b). 4.3.1.2. Dive Time Alarm Setting [2 d ALARM] The instrument has one Dive T ime Alarm Set- ting, whic[...]

54 When in the Nitrox Setting mode the equiva- lent allowed maximum depth based on the chosen setting will also be displayed. Settings for additional mixes (MIX2, MIX3) are made similarly but with the selection of “ON” or “OFF” for these. In order to minimise risk of error during the dive it is highly recommended that the mixes are set with[...]

55 4.3.2.2. Adjusting Date [2 AdJ DA TE] T o enter the Date Setting Mode select MODE- 3 SET - 2 SET TIME- 2 AdJ DA TE. After enter- ing this mode you are able to set the correct year , month and day in this order (Fig. 4.31.). NOTE! • The day of the week is automatically calculated in accordance with the date. • The date can be set within the r[...]

56 NOTE! When the backlight turned OFF , it does not illuminate when an alarm is given. 4.3.3.2. Dive Computer Units Setting [2 UNITS] T o enter the Dive Computer Units Setting mode, select MODE- 3 SET - 3 SET PREF- 2 UNITS. This will enable you to choose between metric and imperial units (Fig. 4.34.). 4.3.3.3. Wireless T ransmission Settings [3 HP[...]

57 5. CARE AND MAINTENANCE This SUUNTO dive computer is a sophisticated precision instrument. Though designed to withstand the rigors of scuba diving you must treat it with proper care and caution as any other precision instrument. 5.1. IMPORT ANT INFORMA TION W A TER CONT ACTS AND PUSH BUTT ONS Contamination or dirt on the water contacts/connector[...]

58 • Protect the unit from shock, extreme heat, direct sunlight, and chemical attack. The dive computer cannot withstand the impact of heavy objects like scuba cylinders, nor chemicals like gasoline, cleaning solvents, aerosol sprays, adhesive agents, paint, acetone, alcohol etc. Chemical reactions with such agents will damage seals, case and fi[...]

59 computer , there is a leak. A leak must be corrected without delay , as mois- ture will seriously damage the unit, even beyond repair . SUUNTO does not take any responsibility for damage caused by moisture in the dive computer , if the instructions of this manual are not carefully followed. In case of a leak, immediately take the dive computer t[...]

60 TOOLS REQUIRED • A fl at 1.5 mm screwdriver or a special tool for spring bars (K5857). • Soft cloth for cleaning. • Needlenose pliers or large screwdriver for turning securing ring. BA TTERY REPLACEMENT The battery and the buzzer are located in the back of the instrument in a separate compartment, the parts of which are shown in Fig. 5.1.[...]

61 8. Check the condition of the O-ring; a defective O-ring may indicate sealing or other problems. Dispose the old O-ring, even if it seems to be in good condition. 9. Check that the battery compartment, battery holder and lid are clean. Clean with soft cloth if necessary . 10. Gently insert the new battery in the battery compartment. Check the po[...]

62 • Assemble the shorter part of the strap. Use the spring bar tool or small screwdriver to compress the spring bars. Make sure that the spring bars get fully seated so they will not come off their holes. Console model: • Re fi t the dive computer in the console according the instructions of the console. CAUTION! Check after the fi rst dives[...]

63 CAUTION! Defects caused by improper battery installation are not covered by the warranty . BA TTERY KIT The transmitter battery kit includes a 3.0 V CR ˚ AA lithium cell battery and a lubricated O-ring. When handling the battery do not make contact with both of the poles at the same time. Do not touch the metal surfaces of the battery with your[...]

64 NOTE! It is imperative to wait at least 30 seconds before re-installing the transmitter battery . When the battery is re-installed the transmitter sends an overpressure (“---“) signal on code 12 for 10 seconds, after which it goes to normal operation, and shuts down after 5min. 9. Check that the new lubricated O-ring is in good condition. Pu[...]

65 T ABLE 6.1. NO-DECOMPRESSION TIME LIMITS (MIN) FOR V ARI- OUS DEPTHS (M) FOR THE FIRST DIVE OF A SERIES T ABLE 6.2. NO-DECOMPRESSION TIME LIMITS (MIN) FOR V ARI- OUS DEPTHS [FT] FOR THE FIRST DIVE OF A SERIES AL TITUDE DIVING The atmospheric pressure is lower at high altitudes than at sea level. After traveling to a higher altitude, the diver wi[...]

66 Before high altitude diving, the instrument must be set to the Altitude Adjustment mode to adjust the calculations for the new altitude. The maximum partial pressures of nitrogen allowed by the mathematical model of the dive computer are reduced according to the lower ambient pressure. As a result, the allowed no-decompression stop limits are co[...]

67 Also on repetitive dives adjustment may be applied to the maximum al- lowable nitrogen overpressure in each theoretical tissue group. Depending on circumstances Suunto RGBM will adapt the decompres- sion obligations by doing any or all of the following: • Reducing no-decompression stop dive times • Adding Mandatory Safety Stops • Increasin[...]

68 • the blinking of the bar graph stops, when the PO 2 is below 0.5 bar • audible alarms are given and the actual PO 2 value blinks when it exceeds the preset limit • in dive planning the maximum depth according to the O 2 % and maximum PO 2 selected. 6.4. TECHNICAL SPECIFICA TION Dimensions and weight: V ytec: • Diameter: 61mm [2.4in]. ?[...]

69 Other displays: • Dive time: 0 to 999 min, counting starts and stops at 1.2 m [4 ft] depth. • Surface time: 0 to 99 h 59 min. • Dive counter: 0 to 99 for repetitive dives. • No-decompression time: 0 to 199 min (- - after 199). • Ascent time: 0 to 99 min (- - after 99). • Ceiling depths: 3.0 to 100 m [10 to 328 ft]. • Air time: 0 to[...]

70 and dive violations. The “M” values are tracked up to 100 hours after a dive. • The EAN and oxygen exposure calculations are based on recommendations by R.W . Hamilton, PhD and currently accepted exposure time limit tables and principles. Battery V ytec: • One 3 V lithium battery: CR 2450 (K5597) and O-ring 1,78 mm x 31,47 mm 70 ShA (K56[...]

71 The following conditions have an affect on the expected battery lifetime: • The length of the dives. • The condition in which the unit is operated and stored (e.g. temperature/cold conditions). Below 10°C [50°F] the expected battery lifetime is about 50-75% of that at 20°C [68°F]. • The use of the backlight and audible alarms. • The [...]

72 made at the owner ’s expense. This warranty is non-transferable from the original owner . All implied warranties, including but not limited to the implied warranties of merchantability and fi tness for a particular purpose, are limited from date of purchase and in scope to the warranties expressed herein. Su- unto shall not be liable for loss[...]

73 8.2. SUUNTOSPORTS.COM SECTIONS SuuntoSports.com includes three sections with several functions. The following paragraphs describe only the basic functions of SuuntoSports. com. Y ou can fi nd detailed descriptions of all the site functions and ac- tivities and step-by-step instructions for using them from the site Help. The Help is available on[...]

74 All groups have a home page that displays information about group events and includes news, noticeboard and other information. Group members can also use group-speci fi c bulletin boards, chat rooms and group calendars, and add links and create group activities. Sport Forums SuuntoSports.com has its own forum for each Suunto sport. The basic fe[...]

75 9. GLOSSAR Y Air T ime The amount of dive time remaining, based on a calculation of cylinder pressure and ambient pressure and present air consump- tion. Altitude dive A dive made at an elevation greater than 300 m [1000 ft] above sea level. Ascent rate The speed at which the diver ascends toward the surface. ASC RA TE Abbreviation for ascent ra[...]

76 Decompression T ime spent at a decompression stop or range before surfacing, to allow absorbed nitrogen to escape naturally from tissues. Decompression range On a decompression stop dive the depth range, between the fl oor and ceiling, within which a diver must stop for some time during ascent. Decompression illness Any of a variety of maladies[...]

77 Half-time After a change in ambient pressure, the amount of time required for the partial pressure of nitrogen in a theoretical compartment to go half-way from its previous value to saturation at the new ambient pressure. HP Abbreviation for high pressure (= cylinder pressure). Multi-level dive A single or repetitive dive that includes time spen[...]

78 O 2 % Oxygen percentage or oxygen fraction in the breathing gas. Standard air has 21% oxygen. Oxygen partial pressure Limits the maximum depth to which the used Nitrox mixture can safely be used. The maximum partial pressure limit for enriched air diving is 1.4 bar . The contingency partial pressure limit is 1.6 bar . Dives beyond this limit hav[...]

79 T issue group Theoretical concept used to model bodily tis- sues for the construction of decompression tables or calculations. Whole-Body T oxicity Another form of oxygen toxicity , which is caused by prolonged exposure to high oxygen partial pressures. The most com- mon symptoms are irritation in the lungs, a burning sensation in the chest, cou[...]

80 DISPOSAL OF THE DEVICE Please dispose of the device in an appropriate way , treating it as electronic waste. Do not throw it in the garbage. If you wish, you may return the device to your nearest Suunto dealer .[...]

5 MODEL MENU BASED SUBMODE 1 MENU BASED SUBMODE 2 MODES AND OPERA TIONS MENU BASED MAIN MODE Activate the timekeeping display LCD & battery check nitrox / gauge display Plan ON MODE Backlight (>2 s) 3 SET 1 MEMORY 2 SIMUL 3 MODE OPTIONS simulate diving ascend descend Add surface interval hours Add surface interval minutes 2 SIMPLAN 1 SIMDIVE[...]

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