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Chromis User Manual

1. SCUBAPRO In case of a fast ascent Chromis may require a decompression stop even within the no stop phase because of the danger of microbubble formation From great depth a slow ascent may cause heightened saturation of tissues and an extension of both decompression duration and total ascent time At shallow depth a slow ascent may shorten the decompression duration Excessive ascent rates for longer periods are entered in the logbook A WARNING The ideal ascent rate must not be exceeded at any time since this could lead to microbubbles in the arterial circulation which could cause serious injury or fatal issue The alarm persists for as long as the ascent rate is 110 or more of the ideal ascent rate 4 7 6 5 MOD ppO A WARNING The MOD should not be exceeded Disregarding the alarm can lead to oxygen poisoning Exceeding a ppO of 1 6bar can lead to sudden convulsions resulting in serious injury or fatal issue If you exceed the MOD in the top row the blinking MOD is displayed with MAX symbol so you can see by how much you have exceeded it In addition Chromis will beep continuously Both the blinking of the MOD value and the beeping will continue for as long as you stay deeper than the MOD 4 7 6 6 CNS O 100 A WARNING When the CNS 0O reaches 100 there is danger of oxygen toxicity Start procedure to terminate the dive Chromis tracks your oxygen uptake via the CNS O clock If the
2. DOWN f UP ESC Salt Fresh Water setting A set of SCUBA related selections are grouped to this menu 4 hay S PETER p DEPTH a By pressing the SEL button the following menu s can be scrolled down 4 3 1 By pressing SEL button the function starts blinking and you may select on or off by pressing or buttons Maximum dive depth alarm By pressing the SEL button in this menu the depth value starts blinking By pressing or buttons the value can be selected from 5 up to 100 meters 20 330 feet in 1m 5ft steps The selection is confirmed by pressing SEL button 4 3 2 By pressing SEL button the function starts blinking and you may select on or off by pressing or buttons By pressing SEL button in this menu the time value starts blinking By pressing or buttons the value can be selected from 5 up to 195 minutes in 5 minutes steps The selection is confirmed by pressing SEL button Maximum dive time alarm 4 3 3 Setting the Micro Bubble level By pressing SEL button in this menu the Micro Bubble level starts blinking By pressing or buttons you may select personal setting from LO up to L5 L5 is the most conservative setting The selection is confirmed by pressing SEL button ce NOTE more about diving with the MB levels read chapter Diving with MB levels CHROMIS USER MANUAL 23 f 4 3 4 The user may select between depth and temperature unit combinations The
3. 6 1 Technical information Operating altitude e with decompression sea level to approximately 4000m 13300ft e without decompression gauge mode at any altitude Max operating depth e 120m 394ft resolution is 0 1m until 99 9m and 1m at depth deeper than 100m Resolution in ft is always 1ft Accuracy is within 2 0 2m 1ft Decompression calculation range e 0 8m to 120m 3ft to 394ft Clock e quartz clock time date dive time display up to 199 minutes Oxygen concentration e adjustable between 21 and 100 Operating temperature e 10C to 50C 14F to 122F Power supply e CR2430 lithium battery Life of the battery e Estimated 2 years or 300 dives which ever comes first Actual battery life depends on the number of dives per year the length of each dive the water temperature and the usage of backlight 6 2 Maintenance The depth accuracy should be verified every two year and can be done by an authorized SCUBAPRO dealer Aside from that Chromis is virtually maintenance free All you need to do is rinse it carefully with fresh water after each dive and change the battery when needed To avoid possible problems with your Chromis the following recommendations will help assure years of trouble free service avoid dropping or jarring your Chromis donot expose Chromis to intense direct sunlight do not store Chromis in a sealed container always ensure free ventilation
4. Aa GAS CSUINGS seie EEE a EE ae 21 AA oO AG eei a e E 21 4 2 2 Nitrox reset Ume cocci cccccieccidchecavcuenceaicratdescndectauntdsinecentcededeanetde 22 4 2 3 Desaturation reset oo eecccccsececsesececeaneeeesaueeceesauseeesaauaseesanes 22 Ao SOW BAC SONNO senecio eE Eaa e E a Ees 23 4 3 1 Maximum dive depth Alarm cccccecseceecseeecseeeeseeeeeeeeeseeeeeaes 23 4 3 2 Maximum dive time alarm sssssssssssrisessrerrsrrrrerrrrrrrrrerrrrreeerrns 23 4 3 3 Setting the Micro Bubble level ceceeeeeeccaesseeeeseaeeeeeeees 23 4 3 4 Setting the user preferred units ssssssrrrreesssrrrerssrrrrrreresn 24 4 3 5 Selecting the salt ocean or fresh water sessisesrrreesrrreeerene 24 Ad APNEA SSMNGS sis tdnctnciceserates cieie EEE EE Eis 24 4 4 1 Setting the dual depth alarm 00 cc cecceececsssseeeeeeeeeeeeeeeeeeeaeeeeeeees 20 4 4 2 Setting the depth incremental alarm ccccceccesssseeeeeeeeeeeeeeees 20 4 4 3 Setting the dive time interval alarm eceeceeeceessesseeeeeeeaeeeeeeees 25 4 4 4 Setting the surface interval alarm ccccceeceseccesssseeeeeesaeeeeseees 26 4 4 5 Setting the ascent speed alarm ccccceeseseeeceaeeeeeeeeeeaneeseeees 26 AO OWIM INOS eresi a E EENE 26 4 6 Algorithm selection paws cce wuss tteetisnietinn Deeavawasmnctihwsadctyccdantadetisevaaldnaiteliaasenitte 2T Ar Dno Wih COONS seereis anien a arte aR eE aE a ea eeds 28 CHROMIS USER MANUAL 3 i AT Display IMC GeO aereise
5. last 48 hours ce NOTE After a desaturation reset the change between the modes GAUGE APNEA and SCUBA are possible immediately However since the GAUGE and APNEA modes are not tracking your tissue nitrogen loading it is recommended to keep the initial intervals between changes on modes A WARNING Diving after having reset the desaturation is extremely dangerous and is very likely to cause serious injury or a fatal issue Do not reset the desaturation unless you have a valid reason to do so ce NOTE Removing and replacing the battery will not reset the desaturation Chromis stores tissue saturation information in a non volatile memory For the time during which the computer is without battery the desaturation calculation is frozen and resumes from where it had left off as soon as a new battery is installed p 32 CHROMIS USER MANUAL 4 7 4 Nitrox is the term used to describe breathing gases made of oxygen nitrogen mixes with oxygen percentage higher than 21 air Because Nitrox contains less nitrogen than air there is less nitrogen loading on the diver s body at the same depth as compared to breathing air Diving with Nitrox However the increase in oxygen concentration in Nitrox implies an increase in oxygen partial pressure 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 1 Sudd
6. lf there are problems with the water contact use soapy water to clean Chromis and dry it thoroughly Do not use silicone grease on the water contacts Do not clean Chromis with liquids containing solvents Check the battery capacity before each dive If the battery warning appears replace the battery If any error message appears on the display take Chromis back to an authorized SCUBAPRO dealer CHROMIS USER MANUAL 43 q SCUBAPRO 6 3 Replacing the battery in Chromis A WARNING We recommend having the b Chromis battery replaced by an Authorized SCUBAPRO dealer The change must be made with particular care in order to prevent water from seeping in The warranty does not cover damages due to an improper placement of the battery Chromis stores the tissue saturation information in a non volatile memory so the battery can be replaced at any time between dives without loss of information ce NOTE After a dive while on surface Chromis stores tissue desaturation data once every hour until desaturation is complete If battery is changed while Chromis has remaining desaturation time the tissue data will not be lost but Chromis will reference the last stored data set As a consequence the data displayed on the surface screen after the battery change desaturation time surface interval no fly time and CNS O may be different from the values displayed just prior to the battery removal After r
7. You may change the setting by pressing or buttons By pressing the SEL button the time setting will be activated hours start blinking and seconds will turn to 00 You may change the hours with or buttons By pressing the SEL button the selection will change to minutes and can be edited the new time setting will be confirmed by pressing the SEL button amp NOTE seconds cannot be edited they always start counting from 0 3 1 4 Set dual time mode F 10 CHROMIS USER MANUAL Dual time uses the same base time as the main clock Therefore adjusting the time as described in chapter Setting the time and 24h or AM PM mode will also influence the dual time The Dual time zone selection will define the difference to the main clock time When the time zone selection is OFF then the Dual time is disabled When pressing the SEL button the UTC2 time hours start blinking You may change the setting by pressing or buttons ina range of 14h 13h or off By pressing the SEL button the minutes will start blinking and you may edit them using or buttons in 15 minute intervals The UTC2 setting will be confirmed by pressing the SEL button 3 1 5 Setting the date TIMER et DEPTH a Tal LAN STOP m rE L cou5 When in the date setting press the SEL button and the blinking digits can be changed by pressing or buttons in 24h mode the first digit are days in 12h mode the month is
8. calculated value of CNS O reaches 100 Chromis will emit a sequence of audible beeps for 12 seconds and the symbol O MAX will be blinking in the top right corner The blinking will continue until the value of CNS O drops under 100 E NA mR A The audible signal stays on for as long as the CNS O value equals or exceeds 100 until the diver will reach the surface 4 7 6 7 Missed decompression stop A WARNING Violating a mandatory decompression obligation may result in serious injury or fatal issue If in presence of a required decompression stop you ascend more than 0 5m 2ft above the required stop Chromis will trigger an alarm the value of the current depth and the value of the required stop depth will blink and a sequence of beeps can be heard This will continue for as long as you stay 0 5m 2ft or more above the required stop p 38 CHROMIS USER MANUAL 4 7 6 8 Low battery A WARNING Do not start a dive if the battery symbol is displayed blinking on the screen on the surface The computer may fail to function during the dive and this could lead to serious injury or fatal issue During the dive Chromis alerts you of precarious battery situations in two ways By displaying a steady battery symbol on the screen This means you can finish the dive but you should replace the battery once you return to the surface By displaying a blinking battery symbol on the screen This means you need to start the proc
9. dive into the details now We hope you will enjoy getting to know your new computer and we wish you many happy dives with Chromis 1 1 Battery Chromis uses a CR2430 battery type which is available at your Authorized SCUBAPRO dealer Chromis will alert you when the battery is approaching a critical value by displaying the battery symbol A steady symbol means that the battery is low with some reserve left In dive mode the backlight cannot be activated If the symbol blinks the battery level is dangerously low and backlight and alarm tones are not activated diving is not recommended before replacing the battery Fi 6 CHROMIS USER MANUAL A WARNING Starting a dive when the battery symbol is blinking can cause the computer to fail during the dive Replace the battery before any diving activity if the blinking battery symbol appears When the do not dive symbol appears with the battery symbol Chromis can not be used for diving before a fresh battery is replaced Please refer to chapter Checking the battery status for details how to manually trigger the battery level check A WARNING Replacing the battery requires opening the electronic compartment of Chromis You must take extreme care when performing the battery change operation in order to ensure the water tightness of the watch Failing to do so will cause the watch to flood during your next dive and permanently ruin it Damage to Chromis due to an improper batte
10. during a dive the pressure surrounding you diminishes If you ascend too quickly the resulting pressure reduction could lead to microbubble formation If you ascend too slowly the continued exposure to high ambient pressure means that you will continue loading some or all of your tissues with nitrogen Consequently there is an ideal ascent rate that is slow enough to minimize microbubble formation yet fast enough to minimize the effect of continued loading on your tissues The pressure reduction that the body can tolerate without significant microbubble formation is higher at depth than it is in the shallow water The key factor is not the pressure drop by itself but rather the ratio of the pressure drop relative to the ambient pressure This means that the ideal ascent rate at depth is higher than it is in the shallow water Along these lines Chromis employs a variable ideal ascent rate its value ranges between 7 20m min 23 66ft min and the actual breakdown by depth range is listed in the chart below DEPTH ASC SPEED If the ascent rate is greater than 110 of the ideal value the SLOW symbol appears For ascent rates higher than 140 the SLOW symbol starts blinking Chromis also provides an audible alarm in case of ascent rates exceeding 110 the intensity of the alarm increases in direct proportion to the degree that the ideal ascent rate is exceeded CHROMIS USER MANUAL 37 i
11. is prompted by microbubble accumulation as opposed to CNS O over 40 and you dive anyway you will have shorter no stop times or longer decompression times Moreover the duration of the microbubble warning at the end of the dive can increase considerably 4 7 3 SOS If you stay above a depth of 0 8m 3ft for more than 3 minutes without observing a prescribed decompression stop Chromis will switch into SOS mode Once in SOS mode Chromis will lock up and will be inoperable as a dive computer for 24 hours If it is used for diving within the 24hours of an SOS lock it will automatically switch to gauge mode and provide no decompression information A WARNING Violating a mandatory decompression obligation may result in serious injury or fatal issue Serious injury or fatal issue 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 Do not dive when the computer is in SOS mode The display shows the same information as in presence of desaturation but at the top row SOS is displayed 4 7 3 1 Desaturation reset Chromis allows you to reset the desaturation of 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
12. manual desaturation reset By pressing the SEL button at this menu the mode starts blinking By pressing or buttons you may select between scuba gauge or APNEA modes By pressing SEL button the selection will be confirmed 4 7 Diving with Chromis The functions of the buttons during diving are Summarized in the table below Note that Chromis can be set to three dive modes SCUBA APNEA and GAUGE Due to the operation differences also buttons have different functions SCUBAPRO Left up Short press backlight Long press bookmark Right up short press alternative display data Long press when SWIM mode active manual start stop of the SWIM mode Long press in GAUGE mode reset average depth counter Right short press in SCUBA and down GAUGE mode Start stop timer Long press in SCUBA and GAUGE mode reset the timer if it is stopped Long press in APNEA mode manual start and end the dive 4 7 1 Upon immersion Chromis will automatically start to monitor the dive regardless of what state it was in prior to the immersion Details on the information displayed can be found in the next sections Display information Dive time the dive time is displayed in seconds at APNEA mode and in minutes at SCUBA and GAUGE modes If during the dive you ascend to the surface the time spent on the surface will only be counted to the dive time if you descend again below 0 8m 3ft within 5 minutes This a
13. HROMIS USER MANUAL The remaining nitrogen loading is shown in this display with the indicator on the right by starting from the first bar segment with N 4 2 Gas settings SET GAS DOWN f UP Nitrox reset DOWN f UP Desat reset CHROMIS USER MANUAL 21 i 4 2 1 You may use your Chromis with all Nitrox mixes from Air to pure oxygen By pressing the SEL button in this display the oxygen content of the Gas starts blinking By pressing buttons you may scroll the value from 21 up to 100 By pressing SEL the content is confirmed and the ppO starts blinking By pressing or buttons you may select the value from 1 00 bar 1 00 bar to 1 30 bar depending on the 02 in the gas mix up to 1 60 bar Set gas It is possible to disable the MOD setting displayed at the middle row but this requires the security code 313 from the user By pressing the SEL button the user will accept the given value ce NOTE Diving with a ppO higher than 1 4 is dangerous and may lead to unconsciousness drowning and fatal injury amp NOTE ppO is fixed to 1 60 bar when selected oxygen content is 80 or higher 4 2 2 Nitrox reset time If you are generally diving with air and want to return to this setting after occasional nitrox dive you can preset a default time when your Chromis will reset back to air By pressing SEL button the time at the top row starts blinking Th
14. OU eese toeauatiet daseecwneetenereoeseseaeaae 4 7 6 7 Missed decompression StOP ccecccseeeeeeeeceeeeeeaeeess 476 8 LOW DARS orreik eidir torapsuonsnanedstacdounestebdesemiad Ao GAUGE MOCO serei sess ule nevi A Ee era OET N EAO EEE T Nenea Ai AO APNEA MOOC seir oreinen ere Arr A A ETERRA TEREE Os OWIM MOTO sess eenen anienbr ene E eeu erne NE AA tenaaevlesaceeleanseedeueeeeoedeaneces Chromis PC interface sssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnna 5T 5 6 oars 01012151510 4 geen ee eR emer eh ner ee enone eee ee A SORA Aieiaia 5 2 Introduction to SCUBAPRO LogTRAK ssc stesseesecndsdoivendeivysadenedtoveeneeadhss 5 2 1 Download dive profiles cseccissencsseigentuadcoasScasheds odbSaat vets dadennardeest 5 2 2 Change warnings settings of the Chromis and reading the computer INFOMATION xjacecseassrdsieds Senecuqactsadeede yaeyaesiasaaraareaas Taking Care Of Chromis ssssssspssieossaoe anea Eaa a 6 1 Technical information sssrsesrrnerrnssressrresrrrerrrsrrrsrrnsrrrerrrsrrrnsrresrresrren 02 MIATA SANG Ss sessirnar e a a a a a an eee 6 3 Replacing the battery in Chromis cceccccsseeecesseeeeeeseeeeeeeseeeeeeeeeeeeeeeas CA W S ae EEA cantons ened E E ree ee GOSS ANY auina nn eintemniaenton ene eens tamseeneesnn atone ON orioa aA EE a ANER SCUBAPRO p 4 CHROMIS USER MANUAL CHROMIS USER MANUAL 5 i 1 INTRODUCTION TO CHROMIS Your Chromis User Manual is divide
15. P ESG CHECK battery state 3 1 1 Setting the alarm clock By pressing the SEL button the alarm status will start blinking and can be selected to either on or off by pressing or buttons By pressing the SEL button the hours of the alarm will start blinking You can scroll the hours setting by pressing or buttons By pressing the SEL button the minutes will start blinking and by pressing or buttons you can scroll them Pressing the SEL button will confirm the settings ce NOTE The sound off setting does not affect the alarm clock However the intelligent battery stretching algorithm disables all warning tones when there are less than 2 dots left in the battery status display or when the battery symbol is blinking in other displays 3 1 2 Setting the UTC The UTC setting will change the shown time compared to Greenwich O Meridian This feature is practical when travelling through different time zones SCUBAPRO By pressing SEL the hours will start blinking You may edit them with or buttons in a range of 14h 13h By pressing SEL the minutes will start blinking and you may edit them with or buttons in 15 minute steps The UTC setting will be confirmed by pressing the SEL button 3 1 3 Setting the time and 24h or AM PM mode In the display above the current time is shown on the display By pressing the SEL button the 24h or 12h setting on the top row starts blinking
16. SCUBAPRO SCUBAPRO CHROMIS DIVING COMPUTER DESIGNED BY DIVING ENGINEERS Welcome to SCUBAPRO dive computers and thank you for purchasing Chromis You are now the owner of an extraordinary partner for your dives This manual provides you easy access to SCUBAPRO state of the art technology and Chromis key features and functions Should you wish to know more about SCUBAPRO diving equipment please visit our website www scubapro com A WARNING e Chromis has a depth rating of 120m 394ft e f 120m is exceeded will be shown in the depth field and decompression algorithm does not calculate correctly e Diving at oxygen partial pressures higher than 1 6bar corresponding to a depth of 67m 220ft when breathing compressed air is extremely dangerous and could lead to serious injury or death CE Chromis dive instrument is compliant with the European Union directive 2004 108 EC Standard EN 13319 2000 Chromis dive instrument is also compliant with the European standard EN 13319 2000 EN 13319 2000 Depth gauges and combined depth and time measuring devices Functional and safety requirements tests methods p 2 CHROMIS USER MANUAL TABLE OF CONTENTS INTFOGUCHION to CHYOIMUNS cesiseissinsncsscecieeschscansnecstsucdceneevecsatnrsuceadennideveesucsatnreedeedebuess 6 Uh RUST a ts aeriarasenaah ses E E 6 Operatoh MODES sorires aaea Aaa AAA EEE 7 Ghromis as a WAU CIN asonu 8 Sl Clock seting UNCHONS sacevesadcptuetat
17. be stopped by pressing button When the stopwatch is stopped it can be reset and restarted by press and hold button While in GAUGE mode the average depth can be reset To reset the average depth press and hold button Similarly to the regular computer mode press button to view the time of day for 5 seconds at the bottom row and other alternative information at the top row In the display below the time of the day has CHROMIS USER MANUAL 39 i been selected and it is 1 second past 10 o clock combined with water temperature that is 20 C Alternative info can be selected in the following order 1 Max depth detected 2 Temperature 3 Average depth 4 Current time of the clock on the bottom row temperature on the top row after 1m Sfeet ascent 4 9 APNEA mode TIMER DEPTH 933 104 Chromis has an advanced APNEA diving mode The main features include faster sampling rate than in normal SCUBA mode and alarm functions tailored to APNEA diving Chromis measures the depth in APNEA mode every 0 25 seconds to ensure the precise maximum depth In logbook the data is saved in 1 second intervals The higher amount of saved data requires more space and the consequence is that SCUBAPRO approx 10 hours of log data can be stored in APNEA mode In APNEA mode it is also possible to start and stop the dive manually by press and hold the button This way you can use Chromis for static APNEA div
18. bled and this is indicated by showing OFF in this menu In case you plan to make a second dive during the desaturation phase you must start the Planner by inputting the time you would still stay at the surface By pressing the or buttons you can set the time in 15 minutes increments The prohibited altitude is shown at middle row and by increasing the surface interval the allowed limit will get to maximum level 4 You may read more about the altitude diving with Chromis in the chapter Altitude diving In case Chromis is displaying the no dive warning the duration of the warning itself is displayed as recommended surface interval for planning purposes rounded up to the nearest fifteen minute increment When the surface interval is given or if you have no remaining desaturation left the planner will start blinking the depth By pressing or you can set the depth in 3m 1Ofeet increments The no decompression dive time is shown for that depth at the bottom row The gas O content is shown at the top row until the 1 CNS for the planned depth has been reached After that the planner shows the CNS at the top row Minimum depth for planning is 9m SOfeet The planner allows only depths according to maximum ppO The gas oxygen content and maximum ppO settings are given at the dive set menu GAS CHROMIS USER MANUAL 17 i A WARNING if you have set ppO max to OFF the planner will allow depths
19. ch the swim mode settings By pressing SEL the swim mode activation starts blinking and you may scroll between on off by pressing or buttons By pressing SEL the distance per stroke starts blinking You may select the value from 0 5m 2ft to 5 0m 16ft by pressing or buttons By pressing SEL the selection is confirmed and the count stroke threshold starts blinking A big threshold setting will detect only large movement as a stroke too small setting may detect too many strokes you must test and adjust this according to your style By pressing or buttons the value can be selected from 5cm 2inch to 40cm 16inch By pressing the SEL button the values are confirmed You may select your Chromis operation mode between SCUBA GAUGE or APNEA modes When Chromis has not been submerged for a while the display looks as below CHROMIS USER MANUAL 27 i Since the Gauge and APNEA modes are not tracking the tissue saturation there is 48h locking interval after the last dive in gauge or APNEA mode before change to a SCUBA mode is possible Chromis shown below went for a dive in gauge mode and the operation mode can not be changed for another 4 hours and 20 minutes From the last SCUBA dive the change to gauge or to APNEA mode is possible after the desaturation time has elapsed If you decide to change between modes before the 48h interval or full desaturation you have to go to desaturation reset menu and make a
20. d 4th or 5th compartment starts off gassing 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 act of pressing and releasing one of the buttons The act of pressing and holding one of the buttons for 1 second before releasing it Surface interval Elapsed time since your last dive has ended CHROMIS USER MANUAL 45 H SCUBAPRO SOS mode The result of having completed a dive without respecting all mandatory decompression obligations Stopwatch A stopwatch To time certain steps of the dive UTC Universal Time Coordinated refers to time zone changes when traveling E 46 CHROMIS USER MANUAL 8 INDEX Active backlight 9 12 28 30 All silent mode 11 Altimeter 8 14 Ascent rate 37 Backlight 9 12 28 30 Battery 6 12 39 44 Bookmarks 28 30 Buttons 8 28 Clock settings 9 CNS 02 33 36 38 45 Date 9 11 Desaturation 45 Desaturation reset 22 32 Dive planner 17 Diving at altitude 33 Flying after diving 35 Gauge mode 39 Logbook 15 41 Maintenance 43 MB levels 30 45 Microbubbles 30 45 MOD 19 38 45 Mountain lakes 36 No dive warning 31 Nitrox 22 33 45 Nitrox reset 22 No fly time 20 34 45 Oxygen concentration 33 Oxygen part
21. d into five main chapters 1 Introduction to Chromis This chapter provides an overview of the Chromis computer and describes its operating modes and functions when on the surface 2 Chromis as a watch This section describes Chromis when it is used as a watch 3 Chromis as a dive computer This chapter describes all settings and functions of Chromis as a dive computer and takes you underwater with Chromis It s about everything Chromis can and will do to enhance your safety and fun underwater 4 Chromis PC interface This chapter is about linking Chromis to your PC MAC It describes how to change settings to download and manage your logbook 5 Taking care of Chromis This chapter describes how you should take care of Chromis after underwater adventures and also summarizes the main technical information of this instrument Chromis is a technologically advanced instrument that can accompany you during your underwater adventures while providing you with accurate depth time and decompression information On the surface Its size makes it your ideal everyday companion With features such as wake up alarm dual time stop watch and altimeter Chromis can tackle almost every possible task SCUBAPRO The buttons allow operating functions access menus and setting changes while on the surface During the dive they set bookmarks show further information on the computer screen and activate the backlight It is time to
22. d lap counter will show the number of laps at the bottom of the screen By pressing SEL button you can exit the stopwatch and return to the Stopwatch menu amp NOTE You can leave the stopwatch actively counting or you can leave the stopped time to the display The Status will be stored to a memory that allows you to continue from the same display at the next time Fi 18 CHROMIS USER MANUAL 4 CHROMIS AS A DIVE COMPUTER Chromis is a full featured diving computer capable of Nitrox decompression calculations ascent rate calculations and warnings The logbook can store up to 50 hours of dive profiles with a 4s sampling rate During the dive Chromis displays information such as depth dive time decompression status water temperature and much more On the surface after a dive remaining desaturation time no fly time surface interval and prohibited altitude classes are shown in addition to the watch functions 4 1 Settings at the dive mode When Chromis is in surface mode you can access various menus dedicated to diving and customize various settings to your liking The dive computer functions of Chromis on the surface include among others setting TIME amp DATE DOWN the oxygen concentration for Nitrox diving setting the MB level of the decompression algorithm setting various warnings and personal preferences To reach any of these functions Chromis must be in Dive surface mode display This can be reac
23. depth calculated from the beginning of the dive or from the time of reset Central Nervous System oxygen toxicity Desaturation time The time needed for the body to completely eliminate any nitrogen taken up during diving The time spent below a depth of 0 8m 3ft Refers to the main gas that is set for the ZH L8 ADT MB algorithm the time in the local time zone Maximum depth reached during the dive Microbubble Microbubbles are tiny bubbles that can build up in a diver s body during and after a dive One of the six steps or levels in SCUBAPRO s customizable algorithm Maximum Operating Depth This is the depth at which the partial pressure of oxygen ppO reaches the maximum allowed level ppO max Diving deeper than the MOD will expose the diver to unsafe ppO levels Refers to a dive in which more than one breathing gas is used air and or Nitrox A breathing mix made of oxygen and nitrogen with the oxygen concentration being 22 or higher In this manual air is considered as a particular type of Nitrox Minimum amount of time the diver should wait before taking a plane This is the time that a diver can stay at the current depth and still make a direct ascent to the surface without having to perform decompression stops Oxygen Oxygen concentration used by the dive computer in all calculations Profile Dependent Intermediate Stop is an additional deep stop which is suggested by Chromis at depth where 3r
24. e battery status and you can manually trigger a measurement by pressing the SEL button in this menu The intelligent battery algorithm will limit some functions towards the end of the battery lifetime See the table below for the status and functions Indicator in battery At other displays status display Battery status Function limitations 0000_ Battery ok for diving none Battery ok for diving none Battery symbol Weak battery change Backlight not to fresh operating Blinking battery Completely used Alarms and symbol no dive symbol battery change to fresh Backlight not operating diving not recommended Blinking battery symbol no dive symbol None change Completely used bat tery change to fresh watch may make a reset any time and remain off Diving mode not allowed only watch is active Fi 12 CHROMIS USER MANUAL ce NOTE The battery capacity and voltage at the end of the lifetime may vary between battery manufacturers Generally operation at low temperatures decreases the battery capacity Therefore when the battery indicator drops below 3 dots change the battery to a fresh one before making any new dives 3 2 Menus and functions at the surface By simply pressing buttons or from the time of day display you can scroll through the various menus in Chromis The diagram below shows the sequence of the menus Note that when you first reach a menu you a
25. e time can be selected from 1 hour up to 48 hours or the nitrox reset time can be disabled by pressing or buttons Gas reset time is disabled when h is shown SCUBAPRO 4 2 3 Desaturation reset WARNING Resetting desaturation will effect calculations of the algorithm and this may lead to serious injury or fatal injury Do not reset desaturation without a solid purpose When Chromis is still counting down the desaturation some menu changes are not possible In case the user decides to reset the desaturation the safety code 313 must be given This procedure secures unwanted resetting and the desaturation reset will be stored to a memory At the next dive log the desaturation symbol will be shown By pressing SEL button the selection on starts blinking By pressing or buttons the desaturation can be deactivated and the state is indicated with selection off When off state is confirmed by pressing SEL button the code page appears The first digit starts blinking and by pressing this can be edited By pressing SEL button the number is confirmed and the next number starts blinking When code is given correctly and it is confirmed with the SEL button press then the desaturation reset is completed a 22 CHROMIS USER MANUAL 4 3 SCUBA settings SET SCUBA UP DOWN SEL ESC Depth Alarm DOWN f UP ESG Dive Time Alarm DOWN f UP ESC MB Level DOWN i UP
26. edure to terminate the dive as there is not enough energy in the battery to ensure proper continued functioning and the computer may fail If the battery symbol is blinking the backlight cannot be activated and the audible warnings and alarms are not available anymore 4 8 GAUGE mode When Chromis is set to GAUGE mode it will only monitor depth time and temperature and will not carry out any decompression calculations You can only switch to GAUGE mode if the computer is completely desaturated All audible and visual warnings and alarms other than the low battery alarm are turned off A WARNING Dives in gauge mode are performed at your own risk After a dive in gauge mode you must wait at least 48 hours before diving using a decompression computer When on the surface in gauge mode Chromis will show neither the remaining desaturation time nor the CNS O value It will however display a surface interval up to 48 hours and a 48 hour no fly time This no fly time is also the time during which you cannot switch back to computer mode After a dive the gauge mode surface display shows the dive time on the middle row In the bottom row the stopwatch is running from the dive start or last manual restart On the top row the maximum depth of the dive is shown After 5 minutes timeout the display changes to gauge menu mode During a dive in GAUGE mode Chromis displays a stopwatch in the bottom row The stopwatch can
27. effect takes place in dive mode in the log book alarm settings altitude settings etc Setting the user preferred units By pressing SEL button in this menu the temperature unit field value starts blinking By pressing or buttons the value can be changed between C F By pressing SEL button the depth field starts blinking Again by pressing or the value may be changed between meters feet By pressing SEL button both unit settings will be confirmed 4 3 5 Selecting the salt ocean or fresh water Chromis measures pressure and converts depth from it by using the water density as a constant 10m 33ft depth at salt water corresponds approximately to 10 3m 34ft at fresh water ce NOTE This setting will adjust the depth on all modes scuba gauge and APNEA SCUBAPRO By pressing SEL button at this menu the fresh or salt setting at the bottom row starts blinking You may scroll between these two settings by pressing or button and confirm by pressing SEL button 4 4 APNEA Settings SET APNEA UP DOWN SEL Dual Depth arm DOWN ESC UP ESC Incremental Alarm DOWN f UP ESC Dive Interval Alarm DOWN UP ESC Surface Interval Alarm DOWN l UP ESC Ascent Speed arm A Apnea diving related selections are grouped in this menu a 24 CHROMIS USER MANUAL 4 4 2 Setting the depth incremental alarm By pressing the SEL bu
28. en effects due to oxygen partial pressure over 1 4bar These are not related to the length of the exposure to high oxygen partial pressure Sudden effects can vary and depend on 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 6 bar 2 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 Long exposures can be divided to more severe Central Nervous System effects and less dangerous long term Pulmonary Toxicity effects Chromis treats high ppO and long exposure effects in the following ways 1 Against sudden effects Chromis has an MOD alarm set for a user defined ppO max As you enter the oxygen concentration for the dive Chromis 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 0 and 1 6bar It can also be turned OFF Please refer to chapter Gas settings for more information on how to change this setting 2 Against long exposure effects Chromis tracks the exposure by means of the CNS O clock At levels of 100 and higher there is risk of long exposure effects and consequently Chromis will activate an alarm w
29. eplacing the battery you must set the date and time O ring must be replaced each time when Chromis is opened The screws must be adjusted to correct torque 6 4 Warranty Chromis has a two year warranty covering defects in workmanship and functioning The warranty only covers dive computers which have been bought from an authorized SCUBAPRO dealer Repairs or replacements during the warranty period do not extend the warranty period itself Excluded from warranty coverage 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 authorized to do so by the manufacturer pressure tests which do not take place in water diving accidents improper placement of the battery cap For European Union markets the warranty of this product is governed by European legislation in force in each EU member state All warranty claim must be returned with dated proof of purchase to an Authorized SCUBAPRO Dealer Visit www scubapro com for the dealer nearest you p 44 CHROMIS USER MANUAL T AVG CNS O DESAT Dive time Gas Local time Max depth MB MB level MOD Multi gas Nitrox NO FLY No stop time oF 0 PDIS ppO ppO max Press Press and hold INT GLOSSARY Average
30. es where normal dive start depth of 0 8 meters will not start a new dive As with gauge mode Chromis doesn t carry out any decompression calculation You can only switch to APNEA mode if the computer is completely desaturated The sequential dive number done at the APNEA session is shown in the top row during the surface interval followed by the dive duration and depth at the middle row On the bottom row the surface interval counter counts 15 minutes and if no repetitive dive is done Chromis turns back to APNEA menu display TIMER a DEPTH J e ANE APNEA mode display during the dive shows at top row the sequential number of the dive At the middle row the dive time in seconds and the maximum depth are shown At the bottom row the ascent speed is shown F 40 CHROMIS USER MANUAL 4 10 SWIM mode It is sometimes practical to be able to measure a distance at the surface for example when searching the dive site If your Chromis has the Surface Exercise mode enabled you can count your kick cycles and measure the distance covered during the exercise Naturally Chromis must be fixed to your ankle so that kick counting is possible Chromis can be set to SWIM mode from any of the surface displays by long press In SWIM mode and during surface exercise Naturally the SWIM mode must have been Chromis displays the count of kicks on the activated from the corresponding menu top row the elapsed time on the m
31. es the prohibited altitude level to decrease Chromis has an altitude warning if you were to reach an altitude that according to Chromis is incompatible with your current residual nitrogen levels it will warn you with an altitude warning 4 7 5 4 Decompression dives in mountain lakes In order to assure optimal decompression even at higher altitudes the 3m 1Oft decompression stage is divided into a 2m 7ft stage and a 4m 13ft stage in altitude ranges 1 2 and 3 If atmospheric pressure is below 610mbar altitude higher than 4000m 13300ft no decompression calculation is carried out by Chromis automatic GAUGE mode In addition the dive planner is not available in this altitude class 4 7 6 Chromis can alert you of potentially dangerous situations via warnings and alarms You can only modify the warning and alarm settings via PC interface Warnings and alarms Warnings represent situations that require the diver s attention but ignoring them does not represent an immediate risk It is up to you to decide which ones you would like to be active and which ones not The available warnings are 4 7 6 1 CNS O 75 Chromis tracks your oxygen uptake via the CNS O clock If the calculated value of CNS O reaches 75 Chromis will emit a sequence of audible beeps for 12 seconds and the symbol will be blinking in the top right corner The blinking will continue until the value of CNS O drops under 75 4 7 6 2 N
32. first By pressing the SEL button the next digits start blinking and they may then be edited by pressing or button Again by pressing the SEL buttons the year after the dot starts blinking The date will be confirmed by pressing the SEL button 3 1 6 Setting the sound off silent mode ON OFF ALR with ALR alarm and attention sound during diving are enabled By pressing the SEL button the current setting will start blinking at the middle of the display By pressing or buttons you may select between the normal mode where alarm and button tones are on or the silent mode where all tones are off or alarm mode where only alarm tones are on ALR The sound off selection is protected with a code When sound off has been selected the first digit starts blinking By pressing or buttons the number can be changed and by pressing the SEL button the number will be stored The unlock code for sound off is 313 CHROMIS USER MANUAL 14 i A WARNING The Sound Off selection will disable all audible dive mode alarms and warnings This is potentially dangerous ce NOTE the only exception to the silent mode is the alarm clock it will beep when activated even if the main setting is sound off 3 1 7 SCUBAPRO Checking the battery status The battery status menu shows how much energy is left in the CR2430 battery A fresh battery shows 5 dots Chromis is periodically measuring th
33. he APNEA dive session opens The dives are shown in repetitive order with max time and depth On the top row the APNEA dive number of that session is shown On the middle row the dive time is shown in SECONDS The max depth is shown at the middle row right By pressing the or buttons the dives in the current session can be scrolled amp NOTE APNEA dives are always shown always in seconds The maximum time before rollover is 199 seconds 3 2 5 Chromis has a swim mode The log appears as SE Surface Exercise for exercises done on the surface Surface exercises The log book will present the start time and date on the main page By pressing the SEL button you can review the number of kicks performed The time and the distance are also shown on the log F 16 CHROMIS USER MANUAL 3 2 6 Planning a dive You can plan your next dive based on your body s nitrogen saturation The planner is also using the following information 1 Selected oxygen concentration 2 Selected water type 3 Selected microbubble level 4 Water temperature of the most recent dive 5 Altitude range 6 Status of saturation at the time when the planner is started 7 Observance of the prescribed ascent rates By pressing the SEL button in the planner menu you will get into the Planner directly or to the surface interval setting repetitive dive ce NOTE When Chromis is in GAUGE or APNEA modes the Planner is disa
34. he dive e Details about the dive where you can edit for example the equipment and tank information e Location which shows your dive site at the world map The selection tabs for views are on the top of the main window 5 2 1 From LogIRAK by selecting Dive gt Options Download Dives you can transfer the Chromis Logbook to your PC or Mac Download dive profiles There are three main views each showing a specific part of your dive logs E 42 CHROMIS USER MANUAL 5 2 2 Change warnings settings of the Chromis and reading the computer information By selecting Extras gt Dive Computer settings you can enable disable warnings that cannot be changed at Chromis unit via menus Activate Warnings and Alarms info CNS O2 reaches 75 Entering Level Stops F MB Level ignored F MB Level reduced _ MB No Stop time 2min Dives count 22 _ LO No Stop time 2mia M Emering deco with MB Level L1 L5 FA Entering deco with MB Level LO Computer IO 400235541 Hardware 10 Software 10 Total time 796mIn Amb pressure 999mbar Read chapter Warnings and alarms about the possible selections that you can modify on your Chromis You may also change the shown units between metric imperial Select Extras gt Options gt measurement units Length Om O ft Pressure bar O psi Temperature Oc OF Volume liter O Cft Weight Okg Ibs Background light O dark 6 TAKING CARE OF CHROMIS
35. he first alarm is short sequence for attention and the second alarm is continuous By setting the first alarm deeper than the second it will be masked by the continuous alarm and you cannot hear the first one CHROMIS USER MANUAL 25 H 4 4 4 Setting the surface interval alarm By pressing SEL button at this menu the function starts blinking and you may enable or disable the alarm by selecting on off with the or buttons After confirming by pressing SEL button the surface interval time starts blinking By pressing or you can select the interval from 15 seconds up to 10 minutes By pressing SEL again the selection will be confirmed 4 4 5 Setting the ascent speed alarm By pressing SEL at this menu the function starts blinking and by pressing you may select between enabling or disabling the alarm with on off setting After confirming by pressing the SEL button the ascend speed starts blinking By pressing or buttons you may select the value from 0 1 to 5 0 meters second 1 15 feet second By pressing SEL the value will be confirmed and the function starts blinking By pressing SEL the selection will be confirmed SCUBAPRO 4 5 SWIM mode If your Chromis has the swim mode enabled the following menu will be shown For the Surface Exercise you must set the kick cycle threshold and the distance per kick for proper result a 26 CHROMIS USER MANUAL By pressing SEL on the swim menu you rea
36. he no fly no dive and altitude restriction symbols are also shown on the time of the day display when applicable A WARNING Flying while Chromis displays the NO FLY symbol can result in serious injury or fatal issue p 34 CHROMIS USER MANUAL 4 7 5 2 Altitude and the decompression algorithm Atmospheric pressure is a function of altitude and weather conditions This is an important aspect to consider for diving because the surrounding atmospheric pressure has an influence on on gassing and off gassing of nitrogen in your body Chromis divides the possible altitude range in 5 classes that are illustrated on the picture below Altitude Class The altitude classes are defined in terms of approximate elevations because the effect of weather conditions can make the switch point pressure occur at different levels A WARNING At altitude class 4 Chromis functions in gauge mode only automatic switch from computer mode ce NOTE You can check your current altitude class and elevation by activating the altitude meter Refer to chapter Checking the Altitude on how to do so ce NOTE Chromis deals with altitude automatically it monitors the atmospheric pressure every 60 seconds and if it detects a sufficient drop in pressure it does the following it indicates the new altitude range and if applicable the prohibited altitude range it indicates the desaturation time which in this case is an adaptation time to the
37. he top row If no decompression required when ascending to a PDI stop depth the PDIS symbol and depth start blinking on the top row and a 2 minute count down starts on the bottom row Once PDIS depth has been reached you should stay on the zone that is 0 5m 3 0m 2ft 10ft from the shown PDIS depth If you descend below this zone the PDIS counter will be deactivated and Chromis calculates a new PDIS depth If decompression is already required this information remains at the bottom row In that case the PDIS counter is not shown but only the PDIS symbol and depth are blinking at the top row for the 2 minutes that are recommended for stay at the PDIS zone A WARNING Even when performing a PDI stop you still MUST perform a safety stop at 5m 15ft for 3 to 5 minutes Performing a 3 to 5 minute stop at 5m 15ft at the end of any dive is still the best thing you can do for your safety 4 7 2 If Chromis detects a situation of increased risk due to the potential microbubble accumulation from previous dives or a CNS O level above 40 the NO DIVE symbol will appear on the display to advise you against performing another dive right away The suggested time interval that you should wait prior to diving is shown at dive mode display No dive warning after a dive CHROMIS USER MANUAL 34 i SCUBAPRO You should not perform a dive as long as the no dive warning is displayed on the computer screen If the warning
38. hed by pressing or button until the indicator on the right shows Dive and then select this mode by pressing SEL 4 1 1 Dive mode at surface o DOWN Altitude meter ot DOWN ESC e A E ESC pages i DOWN ESC Planner SEL ET ESC pages ot DOWN ES ESC ESC C STOP watch ot DOWN DAV A 00e DOWN SEL Clock settings lt A gt st is Sens mews UP CHROMIS USER MANUAL 19 f B STOP watch ESC function SEL Dive settings amp menus lt _ ESC SCUBAPRO SEL_ INTERVAL aes ee j DOWN l UP When you have not been diving with your Chromis for a while no desaturation time left the dive mode may appear as shown below actual day time running at the middle row However in SCUBA mode after a dive the display may appear as shown below Suface interval time at top row Remaining desaturationtime at middle row From here by pressing the SEL button and scrolling with the or buttons you access to a loop of menus which are all related to diving 4 1 2 Surface interval counter After a dive the Chromis shows the surface interval from the latest dive The surface interval counter counts until desaturation is complete After the desaturation is complete this menu disappears The no fly time is indicated with the symbol at the top and is shown in hours until this restriction is completed a 20 C
39. hen this level of CNS O is reached Chromis can also warn you when the CNS O level reaches 75 see section CNS alarm Note that the CNS O clock is independent of the value of poO max set by the user The CNS O clock increases when the oxygen partial pressure is higher than O 5bar and decreases when the oxygen partial pressure is lower than O 5bar Hence while on the surface breathing air you will always be decreasing the CNS O clock During the dive the depth at which O 5bar is reached for various mixes is as follows e Air 13m 43ft e 32 6m 20ft e 36 4m 13ft ce NOTE For oxygen concentrations of 80 and higher the ppO max is fixed at 1 6bar and cannot be changed amp NOTE Repetitive very long exposures technical and rebreather diving with high ppO may cause long term Pulmonary Toxicity effects that can be tracked with OTUs SCUBAPRO recommends model Galileo TMx for completing such dives 4 7 5 Altitude diving 4 7 5 1 Altitude classes altitude warning and no fly time after a dive Going to altitude is in a way similar to starting an ascent from a dive you expose your body to a lower partial pressure of nitrogen and consequently you start offgassing After a dive given the higher nitrogen loading in your body even reaching an otherwise negligible altitude can potentially cause decompression sickness Consequently Chromis constantly monitors the ambient pressure and uses it to evaluate your nitroge
40. ial pressure 33 PC interface 4 ppO2max 45 Safety stop timer 30 Log TRAK 42 SOS mode 32 46 Stopwatch 18 Surface interval 20 26 45 Technical information 43 Time of day 8 13 Time zone 45 Units 24 UTC 10 46 Warning clock 8 Wake up warning 8 Warnings 36 43 Water contact 41 43 Water type 24 CHROMIS USER MANUAL A7 i SCUBAPRO p 48 CHROMIS USER MANUAL
41. iddle row and the converted distance on the bottom amp NOTE The SWIM mode operates only on the surface It will switch automatically to active dive mode when immersed deeper than 3 1 Oft row 5 CHROMIS PC INTERFACE 5 1 Cradle accessory Communication between Chromis and a PC Mac is possible only with a cradle A cradle can be bought from your Authorized SCUBAPRO dealer The communication between the Chromis and the cradle is established via the contact on the case Therefore if the water contact or the spring contact of the cradle has dirt on the surface this should be cleaned with a piece of cloth before use To avoid scratching of your Chromis first place contacts together and then click Chromis to the cradle CHROMIS USER MANUAL p 5 2 Introduction to SCUBAPRO LogTRAK LogIRAK is the software that allows Chromis to communicate with a Windows based PC or Mac OS In order to take advantage of any of these features you need to establish a communication between your PC and Chromis with a cradle To start the communication 1 Connect the cradle to your PC 2 Launch LogTRAK on your PC 3 Select the serial port where the cradle is connected Extras gt Options gt download measurement units _ download Select Serial Port please OD Cara Select the COM port that is used for Chromis cradle 4 Place the Chromis on the cradle e Profile showing the graphical data of t
42. llows for brief periods of orientation While on the surface the time will not show as progressing but it is running in the background As soon as you submerge the time will resume including the time spent on the surface If you spend more than 5 minutes at depth shallower than 0 8m Sft the dive will be considered ended the logbook is stored and a subsequent immersion would cause the dive time to start again from zero Maximum displayed time is 199 minutes For dives longer than that the dive time starts again from O minutes a 28 CHROMIS USER MANUAL Depth the depth is given in 10cm resolution when metric mode When the depth is displayed in feet the resolution is always 1 foot At a depth shallower than 0 8m Sft the display shows Maximum operating depth is 120m 394ft No stop time calculated in real time and updated every 4 seconds Maximum displayed no stop times is 99 minutes A WARNING During all dives perform a safety stop between 3 and 5 meters 10 and 15 feet for 3 to 5 minutes even if no decompression stop is required Temperature Chromis displays the water temperature during the dive and the air temperature on the surface However the skin temperature influences the measurement when worn at the wrist Decompression information when Chromis calculates the need for a mandatory decompression stop it shows you how long and how deep your deepest stop is It also gives you the total ascent time Stop
43. ltimeter for tracking your excursions to the mountains e A thermometer for current weather conditions p 8 CHROMIS USER MANUAL K DOWN A DOWN Planner A DOWN STOP watch A DOWN DIAA a 002 A DOWN E ESC pages EP ce NOTE Thermometer reading when worn at the wrist against the skin the reading is influenced by body heat The function of the buttons on the surface is Summarized in the table below and explained in detail on the following sections Light button Top Left up button Top Right Short press backlight up adds numerical values scrolls up in the menus down button Bottom Right down subtracts numerical values scrolls down in the menus SEL ESC button Bottom Left Short press select Long press escape return to previous menu or cancel the setting 3 1 Clock setting functions By pressing once the UP button from the main time and date display and selecting SET menu by pressing SEL button you will get into clock settings See chart below The different sub menu functions are described in later chapters CHROMIS USER MANUAL 9 i SEL ESC SET alarm clock DOWN f UP ESC SET UTC DOWN UP SET time and ESC 24h or AM PM mode DOWN f UP ESC SET UTC2 DUAL TIME DOWN j UP ESC SET date DOWN f UP ESC SET Sound off DOWN f U
44. mp C Ft amp C m amp F or Ft amp F can be selected from the Dive mode menu Units 3 2 2 Reading the Logbook You can check the main information about your dives in the Logbook by pressing SEL when in the log menu The first page shown is the dive history On the display above the Chromis has 5 dives and total of 4 hours of diving in the Logbook with the deepest dive at 19 0 meters and a longest dive time of 58 minutes 3 2 3 SCUBA log s By pressing or buttons you can scroll the dives in memory In SCUBA mode there is a main page showing depth dive time dive date and used oxygen content ce NOTE If the dive has been done in GAUGE or APNEA modes or exercises at the surface have been logged the main page has GA AP or SE instead of O on the top row By pressing SEL you will select the dive and get to the sub display which shows the following information in SCUBA mode Minimum temperature dive start time and altitude level May also indicate the SOS mode if the last dive was terminated without correct decompression stops The following page shows the dive end time and calculated average depth CHROMIS USER MANUAL 15 D SCUBAPRO 3 2 4 APNEA log Chromis organizes the APNEA dive training in a special way for easier data reading The repetitive APNEA dives are grouped in a specific section and the main page shows the first immersion date and time By pressing the SEL button t
45. n loading and offgassing If Chromis notices a drop in ambient pressure not compatible with your current nitrogen loading it will activate a warning to alert you of the potentially dangerous situation CHROMIS USER MANUAL 33 q If you have remaining desaturation on Chromis you can view the current situation by selecting the dive menu The desaturation text and remaining count down time are shown at the middle row SCUBAPRO with your current nitrogen saturation levels are levels above the second altitude at the display Please read chapter Altitude and the decompression algorithm for more details on this The no dive symbol and count down timer are shown at the top row to indicate the period when you should not have another immersion due to possible micro bubbles high CNS or excessive nitrogen loading in your body By pressing the SEL button the following page shows the no fly symbol with the count down time on the top row until the restriction is completed The N bar graph at the right side is indicating the remaining amount of nitrogen The interval from the last dive is shown at the middle row with the text INT at the bottom row The altitudes where the diver may travel are shown at the first page of the planner menu The prohibited altitude the altitude which Chromis has computed to be incompatible The current altitude and altitude class can be read at the altitude meter menu ALTI ce NOTE T
46. ndesorsnweanaenaunie erien Era seteiawiendesiveaaecucaudeaiacciaed 4 7 1 1 Display configuration during the dive eese A Fy Ne MONO WIRE A E A 4 7 1 3 Setting bookmarks accevessecsiuctieteesduvessieaesnercudsamiedeasiuade 4 7 1 4 Safety Stop TIMES vices enn saacotecdestenncsnonetenieciae tennceeeinceneeces 4 7 1 5 Activating the backlight ssi cicwetedoewsosaeiwhcerew tenddevlenwedstenas 4 7 1 6 Diving with MB levels a5 eves vrasiusomustenonsesvinetontunsexmnvneiniiuns ATA PO OD eee eea Rena ANENE aE TEET 4 7 2 No dive warning after a dive ssssssssssresssrrrrssrressrrressrrrrssnne Tatras se E E E EE 4 7 3 1 Desaturation reset ccccccccseccseceeeseecceeeeseeeeessseesseeeens AA Diving With NINOX acctcsccntouseecesciaotantuestndeuieeneseeiieneneiondeieonninidns Aa AMAG AVN srs EEEN A EA 4 7 5 1 Altitude classes altitude warning and no fly time CEE E E EEE A AAE E 4 7 5 2 Altitude and the decompression algorithm 4 7 5 3 Prohibited altitude se sactastesavscusensescessiessoueieudandswereie star 4 7 5 4 Decompression dives in mountain lakes ccceeeeeees 4 1 6 Warnings and alarms Sanieeudeeceeeiaaeieat ces unmeenea ed eeapeauterdamndtuaee teeta ATOT ON OO 0 ee eE TEEI EIEEE 4 7 6 2 No Stop time 2 Minutes vocicccesncanedossmedesetercespesienarces 4 7 6 3 Entering decompression sssssssssrresesrressrrrrssrressrrres aw E E e AE A E dounesaetewseuiate AT AO MOD POO a errara Ae tenet Sone renee ner ener teen Te 4T tO CNS O T
47. new ambient pressure If a dive is started during this adaptation time Chromis considers it as a repetitive dive since the body has residual nitrogen Elevation Barometric Dive computer switch point mode 4000 m 610 mbar GAUGE 13120 ft 8 85 psi no deco data 3000 m 725 mbar SCUBA 9840 ft 10 51 psi 2000 m 815 mbar SCUBA 6560 ft 11 82 psi 1000 m 905 mbar SCUBA 3280 ft 13 13 psi Om SCUBA Oft 4 7 5 3 Prohibited altitude Going to altitude as well as flying after diving exposes your body to a reduced ambient pressure In a way similar to the no fly time Chromis advises you which altitude classes are safe to reach after a dive and which aren t If you have to drive over a mountain pass to return home after a dive you can view this information in the planner menu The current altitude class is shown on the left of the middle row and the prohibited altitude is shown on the right On the example above the diver is presently at altitude class 2 and should not reach altitudes above 3000m class 3 By increasing the interval time at the top row the allowed altitude increases due to the desaturation caused by the time spent at the current altitude class CHROMIS USER MANUAL 35 H SCUBAPRO amp NOTE when the no repetitive dive symbol is on the planner on the top row initially shows the time period when diving would be allowed again For planning the altitude excursion the interval time can be reduced which caus
48. o Stop time 2 minutes If you wish to avoid unintentionally performing a decompression dive Chromis can activate a warning when the no stop time reaches 2 minutes This applies to current selected MB level no stop time see chapter Diving with MB levels for more information on MB level diving It gives you the opportunity to start ascending before incurring a decompression stop or a level stop obligation Chromis emits a sequence of audible beeps for 12 seconds and the no stop time will blink The blinking will continue until you ascend sufficiently for the no stop time to grow to 6 minutes or until Chromis enters into decompression 4 7 6 3 Entering decompression Chromis can activate a warning when the first mandatory decompression stop appears This alerts the diver to the fact that a direct ascent to the surface is no longer possible When the no stop time ends and a mandatory stop is required before reaching p 36 CHROMIS USER MANUAL the surface Chromis emits a sequence of audible bips and the DECO STOP symbol blinks both for 12 seconds Alarms can not be turned off because they represent situations that do require immediate action by the diver There are five different alarms A WARNING When in gauge mode all warnings and all alarms are OFF except for the low battery alarm When Chromis is set to SOUND OFF mode all audible alarms and warnings are switched off 4 7 6 4 Ascent rate As you ascend
49. re not yet inside it you must press the SEL button to enter the actual menu When the actual menu is selected the indicator starts blinking CHROMIS USER MANUAL 13 a SCUBAPRO 3 2 1 TIME amp DATE q DOWN Altitude meter K DOWN LOG Paces Logbook ESC pages ae DOWN aoe lt gt Planner T pages ot DOWN STOP watch lt lt 5h STOP watch ESC function ot DOWN ESC DNE mode SEL Dive settings ESC amp menus ot DOWN ESC SEL Clock settings set face Sens UP ESC ESC ESC Checking the Altitude Fi 14 CHROMIS USER MANUAL In the altitude menu the current altitude is calculated from the barometric pressure The current altitude class is shown on the top row The current temperature is shown on the bottom row S NOTE barometric pressure is a variable changing with weather and atmospheric pressure at that particular elevation The Dive algorithm uses Altitude Classes which are directly derived from the barometric pressure Altitude is counted from the current barometric pressure and it is therefore a relative value The altitude can be adjusted when current elevation is Known by pressing the SEL button The altitude value will start blinking By pressing or buttons the value can be adjusted in 10m 5Ofeet increments Adjusting the altitude elevation has no effect on the Altitude Class ce NOTE Different combinations m a
50. rldwide proven safety record of the standard ZH L8 ADT algorithm There are five levels of added conservatism or MB levels from L1 to L5 with L5 being the most conservative and L1 being just a bit more conservative than the standard ZH L8 ADT here referred to as LO Choosing an MB level between L1 and L5 makes the algorithm more conservative therefore the diver will have either shorter no stop times or deeper and longer decompression stops than when diving with LO Consequently the body will either take up less nitrogen shorter no stop dives or will be able to off gas more before returning to the surface dives with L1 L5 Both work towards reducing the amount of microbubbles present in the body at the end of the dive Please refer to chapter Setting the Micro Bubble level for information on setting the MB level For easier understanding underwater Chromis handles MB level stops as decompression stops If you select to use a MB level you must follow the consequent ascent plan E 30 CHROMIS USER MANUAL Depth gt Time 4 7 1 7 PDI Stops Chromis is equipped with the innovative Profile Dependent Intermediate Stops introduced on other SCUBAPRO dive computers PDI Stop optimizes the leading compartment off gassing with a low gradient at depth which is calculated from the current profile After the dive profile has reached a level where PDI Stop is recommended the Chromis shows PDIS symbol and depth at t
51. ry replacement is not covered by warranty We strongly recommend having the battery change operation be carried out by your SCUBAPRO dive retailer See chapter Replacing the battery in this manual for information on how to replace the battery 2 OPERATION MODES The reference point for any description of Chromis as a watch is the main time of day display This is the display in which the current time is shown on the middle row The upper row shows the date and the bottom row indicates the weekday The example below shows Saturday 23th of November and the time is one second past 10 o clock If dual time is activated this display shows dual time on the top row the main time on the middle row and the date on the bottom row The different modes are shown on the right side of the computer and the current functioning mode is indicated with a dot Each mode may have sub functions and menus The modes are grouped and described in this manual in three chapters 1 Chromis as a watch 2 Menus and functions at the surface 3 Chromis as a dive computer The following chart describes the main menu structure CHROMIS USER MANUAL 7 i SCUBAPRO TIME amp DATE DOWN ESC q DOWN Altitude meter ESC ESC ESC ESC ESC 3 CHROMIS ASA WATCH Chromis is more than just a watch It features e wake up warning function e dual time e stopwatch with lap time and 72 hours run time e a
52. s deeper than 27m 90ft and total ascent times longer than 99 minutes are shown as 4 7 1 1 Display configuration during the dive Throughout the dive Chromis displays the most important information with largest font at the middle row current depth right the elapsed dive time left and the no stop or decompression information bottom row In addition Chromis utilizes the top row to display additional information regarding the dive By pressing button in the display is shown in Sequence 1 PDIS depth If pending 2 Maximum depth only if 1m Sft ascent detected 3 Water temperature 4 O 5 CNS if greater than 1 6 Time of the day in the middle row temperature at top row 7 Stop timer 4 7 1 2 Stop timer There are many situations during a dive where a simple stop timer which is independent from dive time is practical for example timed tasks at dive courses or special missions etc Chromis has a stop timer integrated on the SCUBA mode Stop timer can be selected by pressing the button and it is shown at the top row During a dive the stop timer starts at the immersion So when displayed for the first time during the dive stop timer and dive time are identical When displayed the stop timer can be stopped by pressing button This generates a bookmark which can be seen on log book using PC Mac interface software When displayed and stopped stop timer can be rese
53. t to zero by pressing and holding button CHROMIS USER MANUAL 29 a 4 7 1 3 Setting bookmarks By press and hold the LIGHT button you can set any number of bookmarks as reminders of particular moments during the dive The bookmarks will appear on the dive profile in SCUBAPRO LogTRAK 4 7 1 4 Safety stop timer If a minimum depth of 10m 30ft has been reached during the dive at a depth of 5m 15ft the safety stop timer will automatically start a 38 minute countdown If you go below 6 5m 2O0ft the timer will disappear and the no stop time is shown again Upon returning to 5m 15ft the timer will start again automatically 4 7 1 5 Activating the backlight To activate the backlight press LIGHT The duration of the backlight is 10 seconds Note The backlight is not available when the BATTERY CHANGE warning appears 4 7 1 6 Diving with MB levels Microbubbles are tiny bubbles that can build up inside a diver s body during any SCUBAPRO dive and normally dissipate naturally during an ascent and on the surface after a dive Dives within no stop time and observance of decompression stops do not prevent the formation of microbubbles in the venous blood circulation Chromis has been equipped with an enhanced SCUBAPRO algorithm named ZH L8 ADT MB to reduce the formation of these microbubbles This enhanced algorithm allows the user to choose a level of conservatism over and in addition to the wo
54. teaneatbud e AEE OR EEEE Ei 9 3 11 Setting thealarm COCK sanhenieudhutnarteelainanseer eaa EEEE EEE eTa 10 Skz poing meL sata ttecttatetatehcnuduiestane oe larmumeentateiuateteesematctaed rir 10 3 1 3 Setting the time and 24h or AM PM mode ccecceeseeeeeeeeee es 10 3 1 4 Setdual time Mode candies hesneicenatuadetdapiureridduainelemnemnaneentuad woes 10 Sees Seinge acter erste tut ne eE EE adnan ERRENA DERT EA 11 3 1 6 Setting the sound off PSST serere e ETE 11 3 1 7 Checking the battery status ccccceccceeeeeeeessseeeeeeeesssneeeeeees 12 3 2 Menus and functions at the surface ssssssssessssrressrrrrssrrrresrrrssrrrresrreree 13 3 2 1 CHECKING the Altitude wuiarcanieidindtuerntdabtanmereerdduanwelarnapuiveerdeuaanens 14 32A Reading tne LOgDOOK iat cnatnces veto elasiensntten ERA PEENES ER 15 a UBS O e E T ener ee eee rt ener 15 e APNEA ee E O E ee eee 16 3 25 SUNMAGCS SXEI CIS SS oere niiina ea Eae EE AER EREE NASENNE 16 320 Fanning a ONT serere eE eE ERE EREEREER 17 CHEM Gimme Using iNe STOPWACN Enemerneen tne erent eire aaa ARENE ATEN 18 Chromis as a dive computer s sssssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn nnmnnn nnmnnn 19 4 1 Settings at the dive mode esssssssessssrrsesssrrrrrrssrrrrrsssrrrrrrssrrrrreessrrrrrent 19 4 1 1 Dive MOde at surface sssssesssssrssssrrrrssrrrssrrrresrrrrsrreresrrereseres 19 4 1 2 Surface interval COUN ETF ccccsceeesecececeseeeeeeseeeeeeeeeeeeaneseeees 20
55. tton in this menu the incremental mode starts blinking By pressing or the you may scroll between the direction of the alarm or disable it with selections off dn down up or both After confirming the selection with SEL button the alarm depth starts blinking By pressing or buttons you may select the alarm value from 5 to 100 meters 20 330 feet By pressing SEL button the alarm value will be confirmed Ea Pa Sg SAS TIMER p DEPTH A By pressing the SEL button the following menu s can be accessed 4 4 1 Setting the dual depth alarm By pressing the SEL button at this menu the on off selection starts blinking By pressing or button this can be edited and confirmed by pressing SEL button After that the first depth starts blinking By pressing or buttons you may select the first depth alarm from 5 to 100 meters 20 330 feet By pressing SEL the first value is confirmed and the second depth starts blinking Like the first by pressing or buttons the second depth alarm may 4 4 3 Setting the dive time interval be set from 5 to 100 meters alarm By pressing SEL button at this menu the function starts blinking and you may enable or disable it by choosing on off with or buttons After confirming by pressing the SEL button the time starts blinking By pressing or you can select the interval from 15 seconds up to 10 minutes By pressing SEL again the selection will be confirmed amp NOTE T
56. up to maximum of 120m 394ft Air nitrox dives with high ppO are extremely dangerous and can lead to fatal injury Be aware that exposures to high ppO will lead CNS clock value to exceed maximum recommended 100 ce NOTE If MOD is shallower than 9m 30feet planning is not allowed and information LO MOD is shown By pressing SEL for planned depth the dive time starts blinking Start point minimum now is the no decompression time By pressing or buttons you may change the time in 1 minute increments When no decompression time is exceeded the planner gives decompression time at the bottom row By pressing SEL button the planner will exit and you will get back to the main menu 3 2 7 Using the Stopwatch By pressing SEL button the stopwatch will be activated In the first display the stopwatch shows the status which can be stop run or lap SCUBAPRO By activating the stopwatch first time the display will be as shown above Press button and the stopwatch starts counting and shows actual state which is run By pressing button again the stop watch stops counting and shows actual state stop The counted time will stay on the display Stopwatch will reset the counted time when button is pressed and held The laps can be marked by pressing button when stopwatch is counting By doing so the display will freeze for 5 seconds and Chromis shows the lap time Counting will continue automatic an

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