Smart Dive Computer
Contents
1. lt DOWN MODE DOWN LOG Down PLAN lt pown PC DOWN INFO y N gt h gt N 4 74 4 4 N 74 N 2 press gt press hold J r J r J r MOD E 22 10 248 22 10 588 jar par NO DECO NO DECO PRE DIVE 1 5 L DIVE TIME da DIVE TIME DIVE TIME TIL LJ 22 08 292 NO DECO ww i i DIVE TIME 8 Ja nd ml NO DECO 217 ALE ALE 1771 71 INT SID 212110 21 111 NO DECO NO DECO NO DECO ww ww 1 Ly E m Bar Jar md ml NO DECO Cc 19 21217 Timeout 4 DIVE TIME DIVE TIME YA ee Smart Dive Computer 1 6 WATCH DISPLAY The watch display is the home display of Smart In this mode the time of day 15 shown in the middle row of the display while date temperature seconds wake up time and second time can be displayed at the bottom by pressing the lower button Note that the temperature reading will be affected by your body heat while you are wearing the watch A growing or diminishing ring of 60 dots around the perimeter of the display represents the seconds When the wake up2. Smart Dive Computer Instruction Manual Smart Dive Computer TABLE OF CONTENTS 1 INTRODUCTION 3 3 2 5 LOW BATTERY 11 1 1 GLOSSARY 3 3 3 DISPLAY INFORMATION 11 1 2 OPERATING MODES 4 3 4 AFTER THE DIVE 12 1 3 USER REPLACEABLE BATTERY 4 3 5 DIVING WITH MORE THAN ONE GAS MIXTURE 12 1 4 CONNECTING SMART TO A PC OR MAC 4 3 5 1 SETTING MORE THAN ONE GAS 13 1 5 BUTTON OPERATION 4 3 5 2 SWITCHING GAS 13 1 6 WATCH DISPLAY 6 3 5 3 SPECIAL SITUATIONS 13 2 MENUS SETTINGS AND FUNCTIONS 6 3 3 3 1 SWITCHING BACK TO A GAS MIXTURE WITH 2 1 CHRONO 6 LOWER OXYGEN CONCENTRATION 13 2 2 PRE DIVE 6 3 5 3 2 SUBMERGING BELOW THE MOD AFTER A GAS 2 3 MODE 6 SWITCH 13 2 4 SEl 7 3 6 BOTTOM TIMER MODE 13 2 4 1 SET DIVE 7 3 6 1 DIVE VIOLATION INDUCED BOTTOM TIMER MODE 14 2 4 1 1 LGHT BACKLIGHT 7 3 7 FREE DIVE MODE 14 2 4 1 2 FCT FACTOR 8 3 7 1 SETTINGS 14 2 4 1 3 ALT ALTITUDE 8 3 7 2 USING SMART ON A FREE DIVE 14 2 4 1 4 WATR WATER 8 3 7 2 1 SURFACING BETWEEN IMMERSIONS 14 2 4 1 5 UN TS UNITS 8 3 7 3 LOGBOOK IN FREE DIVE MODE 14 2 4 1 6 FAST FAST ASCENT 8 TAKING CARE OF SMART 15 2 4 1 7 ALRM ALARMS 8 4 1 TECHNICAL INFORMATION 15 2 4 1 8 ERASE ERASE DESATURATION 8 4 2 MAINTENANCE 15 2 4 1 9 DEEP 8 4 2 1 REPLACING THE BATTERY IN SMART 15 2 4 2 SET TIME 9 4 3 WARRANTY 16 2 5 LOGBOOK 9 4 4 WARRANTY EXCLUSIONS 16 2 6 DIVE PLANNER Y 4 5 HOW TO FIND THE PRODUCT SERIAL NUMBER 16 2 1
3. ca NOTE The behavior of the battery is strongly influenced by temperature It is therefore possible for the battery alarm to appear and to subsequently disappear again for a long time WARNING When the blinking battery symbol appears you should stop the dive safely without delay ZA WARNING When the blinking battery appears watch mode Smart will not function as a dive computer 3 3 DISPLAY INFORMATION Upon immersion if Smart was set to pre dive it will immediately start monitoring the dive Otherwise it will turn on automatically within 20 seconds of having reached a depth of 1 2m 4ft DEPTH be ic DEPTH DEEP SAFERECONO DECO gt 23 The following information is shown current depth max depth no deco time or depth and duration of deepest stop and total ascent time in case of decompression dives dive time temperature nitrogen saturation bar graph By pressing the upper button you can modify the information displayed the top row At each button press the screen cycles through max depth average depth MOD nitrox only and an empty field By pressing the lower button you can modifiy the information displayed in the bottom row At each button press the screen cycles through temperature oxygen percentage CNS stopwatch lieu of the dive time and time of day
4. ASC includes the duration of deep stops as well DEEP DECO and SAFETY stops A SAFETY stop is generated as soon as the depth of the dive exceeds 10m 33ft It has a duration of 3 minutes and it is carried out between depths of 20ft and 3m 10ft at the end of a dive prior to surfacing Such stop is NOT mandatory but HIGHLY RECOMMENDED Smart Dive Computer DECO stops are generated progressively as you stay down beyond the no deco time DECO stops are MANDATORY DEEP stops are generated as you approach the no deco limit You can either have one 2 minute stop or two 1 minute stops DEEP stops are NOT mandatory Deep stops are indicated to the left of the no deco time or as first deepest stop of a deco dive You can turn off the deep stops in the SET DIVE DEEP menu in which case no deep stop is calculated nor 27 DEPTH IN WARNING During all dives perform a safety stop between 3 6 meters 10 and 20 feet for 3 minutes even if no decompression stop is required Upon reaching the optimum range for carrying out a deep stop Im 3ft of the displayed depth or safety stop between 20 and 3m 10ft a countdown timer appears to indicate the progress of the stop 9395 For DECO stops since the duration is function of the exact depth only the minutes are shown During a decompression stop the following symbols may appear y y optim
5. PC 9 5 DISPOSAL OF THE DEVICE 16 2 8 INFO 10 3 DIVING WITH SMART 10 3 1 FEW WORDS ABOUT NITROX 10 3 2 ALARMS 10 3 2 1 ASCENT RATE 10 3 2 2 MOD PPO 10 3 2 3 CNS 75 10 3 2 4 MISSED DECOMPRESSION STOP 11 3 2 4 1 MISSED DECO STOP MODE 11 e 1 INTRODUCTION 1 1 GLOSSARY SLOW DOWN y A ASC AVG CNS DESAT Gas switching Max depth MOD Multigas Nitrox NOFLY X No deco time O 2 0 Factor ppO Switch SURF INT Symbolizes uncontrolled ascent violation Symbolizes decompression stop violation Total ascent time the time it takes to perform the ascent from your current depth to the surface in a decompression dive including all decompression stops and assuming an ascent rate of 10m min or 33ft min Average depth calculated from the beginning of the dive Central Nervous System CNS is used to quantify toxic effects of oxygen Desaturation time The time needed for the body to eliminate the nitrogen taken up during diving The act of changing from one breathing gas to another Maximum depth attained during the dive Maximum Operating Depth This is the depth at which the partial pressure of oxygen 0 reaches the maximum allowed level Diving deeper than the MOD will expose the diver to unsafe levels Refers to a dive in which more than one breathing gas is used air and or Nitrox A br
6. ppO max range between 1 2 and 1 6bar Logbook memory 35 hours of dive profile at 9 second sampling rate Operating temperature 10 C to 50 C 14 F to 122 F Storage temperature 20 to 70 C 4 to 158 F Display Diagonal 31mm 1 inch Mineral glass Power supply CR2430 user replaceable battery battery life 800 1000 dives in one year 200 300 dives over two years 50 dives over 3 years If sleep mode is activated between dive sessions 300 dives over 6 years Actual battery duration depends on the usage of the backlight and the water temperature 4 2 MAINTENANCE The depth accuracy should be verified by an authorized Mares dealer every two years Aside from that Smart is virtually maintenance free All you need to do is rinse it carefully with fresh water after each dive avoid any chemical products and replace the battery when needed To avoid possible problems with your Smart the following recommendations will help assure years of trouble free service avoid dropping or jarring your Smart do not expose Smart to intense direct sunlight do not store Smart in a sealed container always ensure free ventilation NOTE If you notice signs of moisture on the inner wall of the mineral glass take your Smart immediately to an authorized Mares service center WARNING The mineral glass is not exempt from scratches resulting from improper use WARNING Do not blow compr
7. 2 4 1 4 WAtR WATER You set the computer for FRESH water or SALt water calibration depending on where you intend to dive Setting the wrong water type entails an error in depth measurement of approx 3 li e at a depth of 30m 100ft a computer set to salt water will show 29m 97ft in fresh water whereas a computer Set to fresh water will show 31m 103ft in salt water Note that this does not affect the proper functioning of the computer since the computer performs all of the calculations based purely on pressure measurements 2 4 1 5 UN tS UNITS ws You can choose between metric depth in meters temperature in C and imperial units depth in feet temperature in F 2 4 1 6 FASt FAST ASCENT FR falala a 1 5 fast uncontrolled ascent is defined as in which a speed of 12 m min 40ft min or higher was maintained over more than two thirds of the way up This applies to dives deeper than 12m 40ft only In such an event due to the potential of harmful bubble formation Smart locks the computer for 24 hours in order to discourage you from diving again In this menu you have the option to disable the locking up of the computer in the event of an uncontrolled ascent IN WARNING uncontrolled ascent increases your risk of decompression sickness DCS This feature is intended for very experienced divers only such as dive instructors who take fu
8. sequential counter in the middle row the longest dive time and the minimum temperature of the session in the bottom row 2 DEPTH in en N pA 915 FREEDIVE Fa 157 Press and hold the upper button to enter the session and see max depth and sequential counter of the immersion at the top dive time in the middle surface interval prior to immersion and minimum temperature of the immersion at the bottom AVF gt 6 A FREEDIVE Press either button to view the details of other immersions within the same session or press and hold the lower button to exit the session log 4 TAKING CARE OF SMART 4 1 TECHNICAL INFORMATION Operating altitude with decompression sea level to approximately 3700m 12100ft without decompression gauge mode at any altitude Decompression model RGBM Mares Wienke 10 tissues Depth measurement Max displayed depth 150m 492ft Resolution 0 1m until 99 9m and 1m at depth deeper than 100m Resolution in ft is always 1ft Temperature compensation of the measurement between 10 C to 50 C 14 F to 122 F Accuracy from 0 to 80m 262ft 1 0 2m 1ft Temperature measurement Measurement range 10 C 50 C 14 F to 122 F Resolution 1 C 1 F Accuracy 2 C 4 F Clock quartz clock time date dive time display up to 999 minutes Oxygen concentration adjustable between 21 and 99
9. small flat head screwdriver f Replace the battery with the new one from the kit The battery should click in place Make sure to respect the correct polarity of the battery the has to be facing outwards g Position the new o ring from the kit in the groove around the battery ensuring that it sits towards the outer edge of the groove h Position the cover onto the watch case and press it down evenly Ensure that in the area of the screws the cover touches the watch case NOTE Do not lubricate the o ring Lubrication causes the o ring to twist when the cover is put over it causing the watch to flood i Keep the cover pressed onto the watch case while hand tightening the two screws Don t use excessive force while tightening Ideal torque is 12 N cm 17 oz in Reposition the strap which was removed in step a For best results put a drop of Loctite 331 onto the thread of the screw Hand tighten without using excessive force Ideal torque is 25 N cm 35 oz in IN WARNING Mares reserves the right to refuse to provide service under the warranty if the maintenance instructions are not followed 4 3 WARRANTY Mares products are guaranteed for a period of two years subject to the following limitations and conditions The warranty is non transferable and applies strictly to the original purchaser Mares products are warranted free from defects in material
10. stops Failure to do so could result in serious injury or death 3 2 3 CNS 75 WARNING When the CNS reaches 100 there Is danger of oxygen toxicity Start procedure to terminate the dive Oxygen toxicity exposure 15 tracked on Smart by means of the CNS based on currently accepted recommendations for exposure limits This toxicity is expressed as a percentage value which ranges from 0 to 100 When the value reaches 75 an alarm goes off and CNS value blinks on the screen Additionally the CNS becomes the default item in the lower right corner if you call up other information such as the temperature or the time of day after 8 seconds the CNS appears again Ascend to shallower depth to decrease oxygen loading and consider terminating the dive DEPTH CIO DEEP DECO ej E m ML DIVE TIME CAS i 5 1 E gt When the oxygen toxicity level reaches 100 the alarm message and the audible signal are repeated for 5 seconds in one minute intervals after the first occurrence and for as long as the value of CNS stays at or above 100 Consider terminating the dive immediately IN WARNING Diving with oxygen toxicity at levels of 75 or greater may put you into a potentially hazardous situation which could result in serious injury or death 3 2 4 MISSED DECOMPRESSION STOP IN WARNING Violating a mandatory decompression obligation may result in serious inju
11. 2 4 2 SEttIME This menu allows you to set the time format time date wake up alarm and second time En Scroll through the options by pressing either button Press and hold the upper button to edit an option then press the upper or lower button to modify the blinking value then press and hold the upper button to confirm the new setting Smart features a sleep mode in case you don t wear it other than on a dive trip you can put Smart in sleep mode to reduce battery consumption To wake up from sleep mode press either button SLEEP EEP LCD refresh rate lee Sen i E This allows you to switch between a low and a high refresh rate of the display The default setting is low this consumes less energy but under very intense light you might see a slight flicker in the display Setting it to high reduces reduces the flicker but will shorten the battery life by about 30 2 5 LOGBOOK Smart can record the profiles of approximately 35 hours of diving at a sampling rate of 5 seconds The information can be transferred using the optional USB clip to PC via the Dive Organizer software or to a Mac via the Divers Diary software In addition Smart can show most of the information directly on the display When you first enter the logbook menu you will see a summary of all dives performed to date In particular the maximum depth ever reached the total
12. ace The dive session is a group of immersions performed in sequence without exiting the free dive mode IN WARNING The practice of free diving exposes divers to different hazards from those associated with scuba diving The diver should be aware of these hazards and understand how to avoid them IN WARNING Do not practice free diving within 24 hours of having performed a scuba dive 3 7 1 SETTINGS Go into the MODE menu and from here select FREE then press and hold the upper button to confirm your choice This will automatically lead you into the settings menu for free diving Press and hold the lower button to exit if you don t need to change any of the settings Else scroll through the available settings pressing either button To edit a setting press and hold the upper button then press either button to modify the setting then press and hold the upper button again to confirm the change The available settings are AL beep This allows you activate or deactivate all warnings at once ALBEEP Dive time If active when the dive time reaches the set limit an audible alarm will go off and the dive time will blink on the display p a Surf int If active when the surface interval reaches the set limit an audible alarm will go off and the surface interval will blink on the display I N SURF wey y Max If active upon reaching the depth defined in the setting an audible a
13. al range for the decompression stop above decompression stop depth descend immediately The nitrogen bar graph 15 on the right side of the display lt represents nitrogen saturation in the leading tissue compartment The bar graph is made of six segments which gradually fill during the dive The more black segments you see the closer to the no deco limits you are As you enter a situation of mandatory decompression stop all segments will be black During a surface interval the segments will gradually turn off as Smart tracks the offgassing of your tissues Ascent descent rate in presence of a depth change in excess of 80cm 3ft Smart calculates the corresponding ascent or descent speed and displays it at the very left of the middle row of the display for the duration of the ascent or descent both numerically in m min or ft min and graphically with a series of dots each dot representing 2m min or ft min 3 4 AFTER THE DIVE DEPTH Sar Upon returning to the surface Smart first goes into the so called surfacing mode This mode allows you to resume your dive after a brief period of orientation The screen shows a 3 minute countdown amp If you submerge again before the 3 minute countdown 15 over the dive time will resume from where it left off including the time spent on the surface If you do not submerge before the end of the countdown Smart considers the dive finished record
14. ched If you start the dive without putting Smart into pre dive mode it will start to monitor the dive automatically but with a delay of up to 20 seconds from immersion 2 DEPTH fo Jaane The pre dive display shows factor altitude settings time of day surface interval since the last dive and temperature If Nitrox is set it will show the percentage and the corresponding MOD A small S F to the left of the middle row indicates the water type NOTE If you remain in pre dive for longer than 3 minutes without pressing any button Smart will revert to normal watch function It is recommended to put Smart into pre dive before submerging Not doing so can lead to a delay of up to 20s in Smart monitoring the dive 2 1 CHROnO LAR nu Press and hold the upper button to enter this menu The middle row now features a stopwatch while the time of day has moved to the bottom row Press the upper button to start and stop the time then press the lower button to reset the time to zero Press and hold the lower button to exit from the stopwatch function this stops and resets the stopwatch if it was running or stopped at a non zero value upon exiting SA stopwatch features also split time function by pressing the lower button while the stopwatch is running the time itself will freeze while SPL blinks in the top row and the stopwatch continues in the backgr
15. compression calculations dive mode itself can be broken down into 4 sub categories pre dive Smart is on the surface but actively monitoring ambient pressure so that it can begin to calculate a dive the instant it is submerged below 1 2m 4ft dive surfacing Smart is on the surface at the end of a dive dive time calculation is halted but if the diver submerges within three minutes the dive is resumed including the time spent on the surface post dive after the three minutes of surfacing mode Smart closes the logbook and reverts to a display showing desaturation time no fly time and surface interval this lasts until the desaturation and the no fly time both have been reduced to zero 1 3 USER REPLACEABLE BATTERY Smart uses a CR2430 user replaceable battery See section 4 2 1 for instructions on how to replace it Good quality batteries should suffice for approx 200 300 dives over a two year time Span depending on the usage of the backlight and the temperature of the water Diving in cold water usage of the backlight and of the beeper increases battery consumption Refer to section 4 1 for more details on battery life The display alerts you of the status of the battery The three possible situations are described as follows battery symbol not visible in the pre dive and dive display the remaining battery charge is adequate for diving steady battery symbol on the display dive pre dive the
16. ding order of oxygen content 1 G1 has the lowest oxygen concentration and G2 has the highest oxygen concentration IN WARNING It is not possible to switch to a gas ata depth at which the oxygen partial pressure for that gas is greater than the set maximum value MOD for G2 is the switch depth for the corresponding gas This is what Smart uses for its calculation alarms and suggested switch points 3 5 1 SETTING MORE THAN ONE GAS The characteristics of the gases must be entered in the computer before the dive It will then be your responsibility to tell Smart which gas 15 currently being used during the various phases of the dive To use multiple gases you will need to enable the gases and set the oxygen percentage and the ppO max for each one Keep in mind that the MOD for G2 is the depth at which Smart will prompt you to perform the gas switch see section 3 5 2 below To enable G2 press the upper button when G2 OFF is displayed and it will change to G2 ON Now press and hold to confirm it This will lead you to a display in which you can set the 0 and ppO MOD for G2 in a manner completely similar to G1 HOD edo BES 3 5 2 SWITCHING GAS Smart always begins the dive with G1 which has the lowest percentage of oxygen When during the ascent you reach the depth corresponding to the MOD of G2 Smart sounds an audible signal and the oxygen concentratio
17. e deep stop dEEP Allows you to set the time format time and date wake up alarm and second time SEt tIME 2 4 1 SEt dIVE 2 4 1 1 LGHt BACKLIGHT Smart has backlight which activated in case of low ambient light The backlight is activated by pressing and holding the lower button During a dive the backlight will stay on for the duration defined in this menu You can choose between 1 and 10 seconds Smart Dive Computer NOTE The backlight consumes battery energy the longer the backlight stays on the less your battery will last If the low battery warning is activated the backlight will be disabled In surface mode the backlight can be activated by pressing and holding the lower button while the time of day 15 displayed The backlight will turn off after 6 seconds without any button operation which allows you to turn on the light from the time of day mode then enter into menus change settings go into the logbook etc 2 4 1 2 P FCt P ae PG BEBE Smart allows you to set an additional personal safety factor for those circumstances which you want to be especially cautious such as after a long period of inactivityor when planning a strenuous dive In this menu you can choose between the standard algorithm PO a more conservative version 2 or an intermediate one 1 On the pre dive post dive logbook and planner displays P1 is display
18. eathing mix made of oxygen and nitrogen with the oxygen concentration being 22 or higher Minimum amount of time the diver should wait before taking a plane This is the time that you can stay at the current depth and still make a direct ascent to the surface without having to perform mandatory decompression stops Oxygen Oxygen concentration used by the computer in all calculations Personalization factors which allow the user to select between the standard decompression algorithm P0 and an increasingly more conservative one P1 2 Partial pressure of oxygen This is the pressure of the oxygen in the breathing mix It is a function of depth and oxygen concentration A ppO higher than 1 6bar is considered dangerous The maximum allowed value for ppO Together with the oxygen concentration it defines the MOD The depth at which the diver plans to switch to a higher oxygen concentration mix while using the multigas option Surface interval Smart Dive Computer 1 2 OPERATING MODES The functions of the Smart computer can be grouped into two categories each corresponding to a specific mode of operation e watch mode Smart is dry on the surface In this mode you can use it as a normal watch You can also change settings review your logbook use the dive planner see remaining desaturation after a dive download to PC and much more dive mode Smart monitors depth time temperature and performs all de
19. ed with p P2 with p and PO is indicated by the absence of symbols NOTE The choice of p factor will be reflected in the dive planner 2 4 1 3 ALt Atmospheric pressure 15 function of altitude and of weather conditions This is an important aspect to consider for diving because the atmospheric pressure surrounding you has an influence on uptake and subsequent release of nitrogen Above a certain altitude the decompression algorithm has to change in order to account for the effect of the change in atmospheric pressure When diving in a mountain lake find out what the altitude is and choose the altitude range in Smart within the four available options 0 from sea level to approximately 700m 2300ft A1 from approximately 700m 2300ft to approximately 1500m 4900ft A2 from approximately 1500m 4900ft to approximately 2400m 7900ft A3 from approximately 2400m 7900ft to approximately 3700m 12100ft We do not recommend diving at altitudes above 3700m 12100ft If you do set Smart to bottom timer and find appropriate altitude dive tables On the pre dive post dive logbook and planner displays 1 through are indicated with the mountain symbol filled with 1 2 or 3 segments while AD is indicated by the absence of symbols IN WARNING Diving in mountain lakes without first setting Smart to the proper altitude setting can cause severe injury or death
20. essed air onto Smart because it could damage the pressure sensor area 4 2 1 REPLACING THE BATTERY IN SMART WARNING REPLACING THE BATTERY IS A VERY DELICATE OPERATION AND WHEN PERFORMED BY AN INEXPERIENCED PERSON MOST LIKELY WILL LEAD A FLOODED COMPUTER WE STRONGLY RECOMMEND THAT YOU VISIT AN AUTHORIZED MARES CENTER MARES DECLINES ALL RESPONSIBILITY FOR ANY DAMAGE CAUSED BY REPLACING THE BATTERY NOTE Do not discard the old battery in the environment Mares adopts a policy of respect for the environment and urges use of the appropriate separated waste collection service WARNING When changing the battery the o ring must be replaced The Smart battery kit contains a high quality CR2430 battery and a new o ring All computer o rings are inspected individually for integrity Follow these steps and refer to the pictures a Remove the center screw as shown then remove the strap Note that only side of the strap needs to be removed We recommend removing the one without buckle b Remove the two screws near the padlock symbols These hold the battery cover in place NOTE Do not remove the screws denoted with 69 Use a small flat head screwdriver to pry open and liftthe cover on the side where you removed the strap Smart Dive Computer Remove the cover then remove the o ring Discard the o ring e Remove the battery by prying it loose with a
21. fies the top row depth information whereas the lower button modifies the lower right corner of the display From the main watch display and in dive mode press and hold the lower button 4 to activate the backlight An overview of the button function both in surface mode and during a dive 15 presented here below PRESS PRESS AND HOLD Enter a submenu or confirm a setting Scroll up or increase by 1 Reset Stopwatch Multigas only Activate gas switch process Confirm gas switch Modify top row PRESS PRESS AND HOLD From time of day display backlight From all others 0 back one level Scroll down or decrease by 1 Modify bottom row Backlight SURFACE MODE press gt press and hold FREEDIVE A UP DOWN y S BOTTOM TIMER DIVE 2 NO DECO 24m A a a l UP DOWN UP DOWN UP DOWN y 7 EAN SET TIME DIVE 1 NO DECO 21m a f a UP DOWN UP DOWN UP DOWN UP DOWN y N y y y x z AIR SET DIVE STATISTICS NO DECO 18m PC READY a A f i a ENTER ESC ENTER ESC ENTER ESC ENTER ESC ENTER ESC lt gt 5 gt N 46 y 2 N 4 S gt yo gt Mur h ur _up gt 9 WATCH CHRONO
22. he dive session in the top row maximum dive time of the session in the middle row and minimum temperature during the session in the bottom row Press and hold the upper button to exit free dive mode Do this only at the end of your dive session so that your immersions are all logged together see section 3 7 3 for information about the logbook in free dive mode Note that Smart will exit the free dive mode automatically after 10 minutes without immersion 3 7 3 LOGBOOK IN FREE DIVE MODE Smart separates scuba dive logs from free dive logs hence there is a dedicated summary page for each As you enter the logbook function the two alternate every 4 seconds The free dive summary shows max depth in the top row longest dive time in the middle row number of sessions and minimum temperature in the bottom row FREEDIVE Upon pressing the upper button individual logs will be shown in chronological sequence Scuba dives are described in section 2 5 Free dives are grouped in sessions and for each session there are two summary pages the first shows the maximum depth of the session the time the session started and the date in addition to a sequential counter lt DEPTH A BNG FREEDIVE Press and hold the upper button to reach the second summary page which shows the maximum depth and the number of immersions of the session in the top row the time the session started and the
23. ion is e DEPTH Y D ei BOTTOM TIMER e a pla Ed current depth max depth stopwatch dive time temperature in case of an ascent ascent speed m min or ft min Press the upper button to toggle between max depth average depth and an empty field Press the lower button to bring up the time of day in lieu of the dive time the display reverts back to dive time after 4 seconds While the average depth is displayed pressing and holding the upper button resets the average depth DEPTH 398 i BOTTOM TIMER DEPTH 38 tds af Sie 1 Mid Ir o gt From any other display press and hold the upper button to restart the en DEPTH DEPTH 7928 1 5 ih TIMER BOTTON JENER rah 1 171 il mT ir if ir if Smart Dive Computer 3 6 1 DIVE VIOLATION INDUCED BOTTOM TIMER MODE The following violations can occur during an Air or Nitrox dive Uncontrolled ascent Missed deco stop In case of a violation Smart will restrict the use of Air and Nitrox mode for 24 hours and will only allow operation in bottom timer mode 3 7 FREE DIVE MODE Smart features a free diving mode with dedicated features specifically for breath hold divers In free diving we differentiate between immersion and dive session An immersion is the individual trip below the water surf
24. ion than what you are currently breathing This can happen for instance if you want to descend deeper than the MOD for the current gas or if for instance you have run out of gas in G2 during the decompression To do so simply press the lower button until the oxygen concentration 15 displayed in the lower right corner then press and hold the upper button to initiate the gas switch From here on the procedure is the same as described in 3 5 2 3 5 3 2 SUBMERGING BELOW THE MOD AFTER A GAS SWITCH If after having switched to a gas mixture with a higher oxygen concentration you inadvertently drop again below the MOD for that mixture the MOD alarm will immediately go off Either switch back to a gas mixture suited for that depth or ascend above the MOD for the gas mixture you are breathing from 3 6 BOTTOM TIMER MODE When Smart is set to bottom timer mode it will only monitor depth time and temperature and will not carry out any decompression calculation Maximum displayed dive time in gauge mode 15 999 minutes You can only switch to bottom timer mode if the computer is completely desaturated All audible and visual alarms other than the low battery alarm are turned off IN WARNING Dives bottom timer mode are performed at your own risk After a dive in bottom timer mode you must wait at least 24 hours before diving using a decompression computer During a dive in bottom timer mode the following informat
25. larm will go off and the depth will blink on the ee aa DEPTH Mihi Int This allows you to set a depth interval at which a short audible sequence is activated For instance if you set a depth interval of 5m 15ft the audible sequence will go off at 5m 15ft 10m 30ft 15m 45ft etc ait DEPTH fir Mihi 3 7 2 USING SMART A FREE DIVE Put Smart into PRE DIVE so that as soon as you submerge past 1 2m 4ft it will start monitoring your dive Smart will show the current depth in the top row the dive time in minutes and seconds in the middle row and the water temperature in the bottom row Press the lower button and the time of day will appear for a few seconds to the left ofthe temperature Press and hold the lower button to activate the backlight A DEPTH FREEDIVE 1 s 3 7 2 1 SURFACING BETWEEN IMMERSIONS When returning to a depth of less than 0 8m 3ft Smart switches to surface mode The display will show the maximum depth of the dive that just ended in the top row its duration the middle row and the surface time in minutes and seconds in the bottom row together with the minimum temperature recorded during the immersion The number to the right of the max depth is the sequential counter of the immersions in the dive sequence 7 DEPTH Yorke z y F By pressing the upper button the display switches to maximum depth of t
26. lieu of the dive time the latter has a 4 second time out after which the dive time 15 displayed again To reset the stopwatch press and hold the upper button while the stopwatch is displayed The depth is given in 10cm resolution until 99 9 meters after which it is given in 1m resolution When the depth is displayed in feet the resolution is always 1 foot At a depth shallower than 1 2m 4ft the display shows Maximum possible depth is 150m 492ft The dive time is displayed in minutes If during the dive you ascend to the surface the time spent on the surface will only be counted if you descend again below 1 2m 4ft within 3 minutes This allows for brief periods of orientation While on the surface the time will not show as progressing but it is running the background As soon as you submerge the time will resume including the time spent on the surface The no deco time is calculated in real time and updated continuously Maximum displayed no deco time 15 999 minutes If you remain at depth beyond a no deco time of zero minutes you will enter into decompression you can no longer make a direct ascent to the surface and Smart displays a MANDATORY decompression stop Instead of a no deco time it shows you the depth and duration of the deepest stop and the total ascent time ASC which includes each decompression stop and the time required to travel the vertical distance to the surface at a rate of 10m min 33ft min
27. ll responsibility for the consequences of turning off this function 2 4 1 7 ALRM ALARMS In this menu you can disable audible alarms IN WARNING Disabling audible alarms can lead you into potentially dangerous situation and could result in serious injury or death 2 4 1 8 ErASE Eee cE PUTA LIS LIS Smart allows you to reset the desaturation in the computer Any tissue saturation information from a recent dive will be reset to zero and the computer treats the next dive as a non repetitive dive This is useful when the computer is loaned to another diver who has not dived in the last 24 hours IN WARNING Diving after having reset the desaturation is extremely dangerous and Is very likely to cause serious injury or death Do not reset the desaturation unless you have a valid reason to do so In order to prevent accidental desaturation reset you must enter the security code once you decide to proceed with the reset The security code is 1234 After entering the security code you will get a confirmation of the successful completion of the operation 2 4 1 9 dEEP This menu allows you to turn off the calculation and display of the deep stop which leads to a clearer display of decompression information in case you are not interested in performing deep stops anyway See section 3 3 for more information on deep stops En EP
28. n of G1 starts to blink in the lower right corner DEPTH Press the upper button while this indication is blinking to initiate the gas switch the oxygen percentage of O2 starts to blink in lieu of that of G1 and in the top right corner the letters MOD and the value of the MOD for G2 appear blinking 1299 5 59 DEPTH UZ DIE TIME ri gt LI Press and hold the upper button to confirm the switch to G2 or press the lower button to cancel the gas switch and stay with G1 In both cases the set oxygen concentration will be displayed steadily in the lower right corner of the screen and within 20 seconds the ascent time is updated to reflect the higher oxygen concentration in the breathing gas Smart will allow the change only if the depth is shallower than the MOD corresponding to the set ppO max Smart will not allow the gas switch if you are deeper The automatic blinking ofthe oxygen concentration of G1 lasts only for 20 seconds You can however initiate the gas switch at any time by pressing and holding the upper button when the oxygen concentration is displayed in the lower right corner then switch to G2 as long as your depth allows the gas to be activated 3 5 3 SPECIAL SITUATIONS 3 5 3 1 SWITCHING BACK TO A GAS MIXTURE WITH LOWER OXYGEN CONCENTRATION There may be situations in which you have to switch back to a gas with lower oxygen concentrat
29. number of dives the total number of hours spent underwater and the coldest water temperature recorded gt DEPTH rie DIVE TIME From here press either button to scroll through all dives in the memory of the computer The number to the right of the middle row while scrolling through dives is the sequential counter of the logbook 1 being the most recent dive Press and hold the upper button to view the details of a particular dive Each dive has three pages of data Each page has maximum and average depth at the top while the middle row has max ascent rate and time the dive started on pages 1 and 2 and max ascent rate and time the dive ended on page 3 The bottom row contains date of dive and 0 on the first page dive time and minimum water temperature on the second page and surface interval to previous dive and CNS at end of dive on the third page DEPTH D gt 7 EM NO DECO zo 7 Press either button to scroll between the pages of information press and hold the lower button to return to the list of the main logbook menu 2 6 DIVE PLANNER PLANO This function allows you to scroll through the decompression limits automatically taking into account the current residual saturation of the tissue compartments from a preceding dive The times shown when scrolling the no decompression limits take into account the information entered under the set dive submenu water type al
30. ound Every time you press the lower button the split time will refresh with the new value Press and hold the lower button to exit the split time mode Note that while in split time mode the upper button has no function 2 2 PRE dIVE Press and hold the upper button to enter this menu and put Smart into the ready to dive mode 2 3 MOdE MODE Here you can define the type of gas you will be breathing during the dive air or enriched air nitrox including multigas You can also set Smart to bottom timer in which case Smart will show only time depth and temperature it will not carry out any decompression calculation and it will not show any warnings and alarms You can set Smart also to freediving mode which in essence is a bottom timer with special features dedicated to free divers Press either button to scroll through the four possible options AIR EAN bottom timer or FREE then press and hold the upper button to select it BOTTOM FREE AIR is the equivalent of setting EAN to 21 and a ppO max of 1 4bar but simplifies the display a bit by not showing the CNS lits value however is calculated in the background and if needed the 75 warning and the 100 alarm are triggered When selecting EAN you are taken to submenu which you can define the percentage of oxygen in the mixture 0 and the maximum value of oxygen partial pressure
31. ppO max for up to two breathing mixes The maximum possible value for the ppO max is 1 6bar Most training agencies recommend not to exceed a value of 1 4bar Mon qe lity 148922 Once inside this menu press either button to change the 0 and observe how this affects the maximum operating depth MOD Then press and hold the upper button to move on to the and use either button to change the value again noticing how this affects the MOD Press and hold the upper button again to save the setting This leads you to the G2 OFF screen Press and hold the lower button to exitthe menu or go to section 3 5 for information about diving with more than one gas IN WARNING Diving with Nitrox may only be attempted by experienced divers after proper training from an internationally recognized agency Before every dive and after changing the tank you must make sure that the set oxygen concentration in Smart corresponds to the oxygen concentration tank Setting the wrong oxygen concentration can lead to serious injury or death See chapter 3 5 for more information about diving with more than one gas 2 4 SEt Smart s SEt menu allows you to change settings Once inside this menu press either button to scroll between two submenus SEt dIVE where you can set parameters pertaining to the dive and SEt where you can set parameter
32. pth below 12m 40ft DOWN appears and the speed value blinks If aspeed in excess of 12m min 40ft min is maintained for two thirds or more of the depth at which the alarm was first triggered Smart considers it a dive violation and the display will show the steady SLOW DOWN symbol 1 1 383 55 0 I gt TIME In this case if the diver attempts a repetitive dive after surfacing Smart will only function as a depth gauge and timer bottom timer mode LOW and will display DOWN on the screen throughout the dive 171 E BOTTOM TIMER DIFE Ir cu SLOW Bow 3 2 2 IN WARNING The MOD should not be exceeded Disregarding the alarm can lead to serious injury or death Exceeding a ppO of 1 6bar can lead to sudden convulsions resulting in serious injury or death When the diver reaches a depth at which the ppO of the inspired gas exceeds the maximum limit entered in the corresponding setting from 1 2 to 1 6 an audible alarm goes off the current depth starts to blink and the value of the MOD is shown to the right of the current depth IN DEPTH f HU Ed ty of E TIME 25 The alarm persists until the diver has ascended enough for the ppO to return within the set limit IN WARNING When the MOD alarm is triggered ascend immediately until the alarm
33. re is enough charge for a few more dives but you should consider replacing the battery at the next opportunity blinking battery symbol on the display the battery is too weak for diving If this happens during dive you must not perform more dives before replacing the battery If you see the blinking battery symbol on the surface be aware that Smart will not function as a dive computer and will not turn on if submerged The level of the battery charge can also be found on the INFO page see section 2 8 1 4 CONNECTING SMART TO A PC OR MAC To connect Smart to a PC or Macintosh computer use the optional clip and the USB cable and Dive Organizer to download your dives to a PC or Divers Diary to download your dives to a Mac Both software programs can be downloaded from www mares com 1 5 BUTTON OPERATION Smart has 2 buttons labelled up enter and down esc Each button can be pressed and released to perform one function up and down and pressed and held for one second to perform a different function enter and esc We ll refer to them as upper and lower button in the remainder of this manual On the surface pressing and releasing either button allows to scroll through menus settings and values Pressing and holding the upper button enters into a menu or confirms a setting while pressing and holding the lower button exits from a menu and goes up one level During the dive the upper button modi
34. ry death If you ascend above the decompression stop depth by more than 0 3m 1 a downward pointing triangle appears an audible alarm goes off and both the current depth and the depth of the deco stop start blinking This alarm remains active until you return to the correct depth 4 S E ps a 8 e an 5 Z WARNING When the missed deco stop alarm is triggered desaturation of the simulated tissue compartments is halted and resumes only when the diver returns to the correct stop depth Never ascend above the displayed decompression stop depth 3 2 4 1 MISSED DECO STOP MODE If the stop depth is exceeded by more than 1m 3ft for more than three minutes Smart considers it a dive violation and the display will show 2 In this case if the diver attempts a repetitive dive after surfacing Smart will function only as a depth gauge and timer bottom timer mode and it will display X on the screen DEPTH y PEE 7 8 a a a La 3 2 5 LOW BATTERY If Smart detects that the battery power level 15 safe for diving but without much reserve left it will show the steady battery symbol on the display and the backlight will be disabled If the level of the battery decreases to the point of making it unsafe to dive the battery symbol starts blinking DEPTH NO DECO
35. s and workmanship components that upon technical inspection are found to be defective will be replaced free of charge Mares S p A declines all responsibility for accidents of any kind that result from tampering or incorrect use of its products Any products returned for overhaul or repairs under warranty or for any other reason must be forwarded exclusively via the vendor and accompanied with a proof of purchase slip Products travel at the risk of the sender 4 4 WARRANTY EXCLUSIONS Damage caused by water seepage resulting from improper use e g dirty seal battery compartment closed incorrectly etc Rupture or scratching of the case glass or strap as a result of violent impact or blows Damage resulting from excessive exposure to elevated or low temperatures Damage caused by the use of compressed air to clean the dive computer 4 5 HOW TO FIND THE PRODUCT SERIAL NUMBER To see the product serial number enter the INFO submenu e 5 DISPOSAL OF THE DEVICE Dispose of this device as electronic waste Do not throw it away with regular rubbish If you prefer you can return the device to your local Mares dealer eek bm Algorithm mares Mares S p A Salita Bonsen 4 16035 Rapallo Ge ITALY Tel 39 01852011 Fax 39 0185 669984 www mares com
36. s pertaining to time and date SEE Press and hold the upper button to enter a menu then press either button to scroll up and down between available options or to increase or decrease the value of a setting Then press and hold the upper button to confirm the change in setting Press and hold the lower button to go up one level in the menu tree MENU Description SEt dIVE Allows you to set the duration after which the backlight turns off automatically You can set this between 1 and 10 seconds LGHt Allows you to choose between the standard algorithm PO and an increasingly more conservative one P1 P2 PFCt Allows you to set the algorithm into altitude mode when diving in mountain lakes ALt Allows you to choose between salt and fresh water Allows you to choose between metric and imperial ft F units UN tS Allows you to turn off the dive violation due to uncontrolled ascent This is for dive instructors only who may find themselves in such a situation because of their teaching requirements FASt Allows you to turn on or off Run all audible alarms of Smart Allows you to reset the nitrogen saturation to zero thereby erasing the effects of a previous dive This is only for people who plan to lend their computer to another diver who has not performed a dive within the last 24 hours ErASE Allows you to turn off the calculation and display of th
37. s the data to the logbook and reverts to the so called post dive mode un un un SURF INT The post dive screen shows the following information The remaining desaturation time DESAT this 15 calculated by the decompression model in the computer Any dive started while there is remaining desaturation on your computer is considered a repetitive dive meaning that Smart accounts for the pre existing nitrogen load in your body The no fly time NO FLY TIME this is the time during which an exposure to the reduced pressure inside the cabin of an airplane could cause decompression sickness Smart employs as recommended by NOAA DAN and other agencies a standard 12 hour no deco non repetitive dives or 24 hour deco and repetitive dives countdown There are two special cases if the DESAT TIME is longer than the NOFLY TIME Smart automatically sets the NO FLY TIME to be equal to the DESAT TIME the DESAT TIME could be shorter than the NO FLY TIME which would imply that you cannot fly although you are desaturated This is simply the consequence of the desaturation time being calculated by the algorithm based on the actual dive profile while the no fly time is an accepted standard in the diving industry Since the real effect of flying after diving has never been fully investigated this approach fits with our philosophy IN WARNING Flying while Smart displays can re
38. ssure in the breathing mix at the same depth At higher than atmospheric partial pressures oxygen can have toxic effects on the human body These can be lumped into two categories Sudden effects due to oxygen partial pressure over 1 4bar These are not related to the length of the exposure to high partial pressure oxygen and can vary in terms of the exact level of partial pressure they happen at It is commonly accepted that partial pressures up to 1 4bar are tolerable and several training agencies advocate maximum oxygen partial pressures up to 1 6bar Long exposure effects to oxygen partial pressures over 0 5bar due to repeated and or long dives These can affect the central nervous system cause damage to lungs or to other vital organs Smart keeps you safe with respect to these two effects in the following ways as long as it is set to either air or nitrox e Against sudden effects Smart has an MOD alarm set for a user defined ppO max As you enter the oxygen concentration for the dive Smart shows you the corresponding MOD for the defined ppO max The default value of ppO max from the factory is 1 4bar This can be adjusted to your preference between 1 2 and 1 6bar Please refer section 2 1 for more information on how to change this setting If Smart is set to air the is set to 1 4bar by default Against long exposure effects Smart tracks the exposure by means of the CNS Central Nervous Sy
39. stem At levels of 100 and higher there is risk of long exposure effects and consequently Smart will activate an alarm when this level of CNS is reached Smart also warns you when the CNS level reaches 75 Note that the CNS is independent of the value of set by the user 3 2 ALARMS Smart can alert you of potentially dangerous situations There are five different alarms Ascent rate alarm Exceeding a safe ppO MOD CNS 75 Missed decompression stop Low battery during the dive IN WARNING When in bottom timer mode all warnings and all alarms are OFF aside for the low battery alarm NOTE Alarms are both visual and audible as described in detail below Ascent rate alarm has priority over other alarms if they are triggered simultaneously 3 2 1 ASCENT RATE As soon as depth decreases Smart activates the ascent rate control algorithm and displays the calculated value This is shown to the very left in the middle row of the display IN WARNING A rapid ascent increases the risk of decompression sickness If Smart determines an ascent rate of 10m min 30ft min or higher the fast ascent alarm is triggered an audible alarm goes off and St Li appears on the display This persists until the ascent rate is reduced to 10m min 30ft min or less 236 39 2 SL TIME zu If the ascent rate exceeds 12m min 40ft min at a de
40. sult serious injury or death The surface interval SURF INT this is displayed from the moment the dive 15 closed 3 minutes after surfacing for as long as there is remaining desaturation or no fly time on the computer Incase of a dive violation the corresponding SLOW symbol DOWN X is shown In addition the bar graph shows the calculated nitrogen load in the leading tissue You can use this to gauge your progress in getting rid of nitrogen as the surface Interval grows Smart continues to perform decompression related calculations nitrogen release for as long as there is desaturation time left 3 5 DIVING WITH MORE THAN ONE GAS MIXTURE IN WARNING Diving with more than one gas mixture represents a much higher risk than diving with a single gas mixture and mistakes by the diver may lead to serious injury or death During dives with more than one gas mixture always make sure you are breathing from the tank that you intend to breathe from Breathing from a high oxygen concentration mix at the wrong depth can kill you instantly Mark all your regulators and tanks so that you cannot confuse them under any circumstance Before each dive and after changing a tank ensure that each gas mixture is set to the correct value for the corresponding tank Smart enables you to use two gas mixtures during the dive air and Nitrox only The two mixtures are labeled G1 and G2 and must be in ascen
41. time is displayed pressing and holding the upper button turns the wake up alarm AN or Or Fa futon When the second time is displayed pressing and holding the upper button switches main time and second time E u i 4 054 2 MENUS SETTINGS AND FUNCTIONS This chapter describes in detail all menus setting and functions of the Smart dive computer From the time of day display pressing the upper button allows you to scroll through the following sequence of menus note that once inside the menu loop pressing the lower button scrolls through the menus in reverse sequence 0 allows you to operate Smart like a normal stopwatch PRE dIVE places Smart in the ready to dive mode MOdE allows you to set the computer to air nitrox bottom timer mode or free diving mode apnea SEt allows you to view and change all settings relating to the dive computer SEt dIVE and to the watch SEt tIME LOG allows you to access the detailed history of the dives performed PLAN allows you to view no deco times as a function of depth based on your current nitrogen load PC allows you to download dives to a PC or Mac INFO allows you to view information about software and hardware of your Smart The pre dive mode puts the computer ina ready to dive mode and ensures that Smart starts to monitor the dive as soon as a depth of 1 2m 4ft is rea
42. titude personal Safety factor Air or in the case of Nitrox the values for the oxygen percentage and its maximum partial pressure For each depth the display shows the corresponding no deco time expressed in minutes If Nitrox mode is selected the maximum depth shown in the planner Is limited by the MOD NOTE The dive planner is enabled only if either air or nitrox mode is set 2 7 PC This submenu allows you to download your dive data to PC or Mac Press and hold the upper button and the display will show PC ready symbolizing that Smart is ready to communicate Smart Dive Computer 2 8 INFO 1 471 This submenu provides information about the hardware and software of your Smart and about the status of the battery two segments inside the battery means the battery is ok one segment means the battery is low but the watch functions as dive computer one segment blinking means the battery is too low for use as dive computer e 3 DIVING WITH SMART 3 1 AFEW WORDS ABOUT NITROX Nitrox is the term used to describe breathing gases made of oxygen nitrogen mixes with an oxygen percentage higher than 21 air Because Nitrox contains less nitrogen than air there 15 less nitrogen loading on the diver s body at the same depth as compared to breathing air However the increase in oxygen concentration in Nitrox implies an increase in oxygen partial pre
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