® Chromis User Manual
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. WARNING • Chromis has a depth rating of 120m/394ft.
1. Introduction to Chromis ....................................................................................... 6 1.1 Battery .................................................................................................... 6 2. Operation modes .................................................................................................. 7 3. Chromis as a watch .............................................................................................. 8 3.1 Clock setting functions ........
.7.1 Display information ................................................................................ 28 4.7.1.1 Display configuration during the dive ..........................29 4.7.1.2 Stop timer ...................................................................29 4.7.1.3 Setting bookmarks ......................................................30 4.7.1.4 Safety stop timer .........................................................30 4.7.1.5 Activating the backlight ....................................
English CHROMIS USER MANUAL 5
1. INTRODUCTION TO CHROMIS Your Chromis User Manual is divided 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.
English 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. WARNING 2.
TIME & DATE -/DOWN +/UP -/DOWN ESC Altitude meter +/UP -/DOWN ESC SEL LOG ESC Logbook pages +/UP -/DOWN ESC SEL Planner ESC Planner pages +/UP -/DOWN ESC SEL STOP watch ESC STOP watch function +/UP -/DOWN ESC SEL DIVE mode ESC Dive settings & menus +/UP -/DOWN ESC SET SEL ESC Clock settings & menus +/UP 3. CHROMIS AS A WATCH Chromis is more than just a watch.
Short press = backlight +/up button, Top Right: +/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, English Light button, Top Left: Long press = escape (return to previous menu) or cancel the setting 3.
3.1.1 Setting the alarm clock 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 By pressing the SEL button the alarm status will start blinking and can be selected to either on or off by pressing + or - buttons.
3.1.6 3.1.5 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. Setting the date Setting the sound off (silent mode) English Dual time uses the same “base time” as the main clock.
3.1.7 WARNING The Sound Off selection will disable all audible dive mode alarms and warnings. This is potentially dangerous. the only exception to the silent NOTE: mode is the alarm clock, it will beep when activated, even if the main setting is: sound off. Indicator in battery status display 12 At other displays Checking the battery status The battery status menu shows how much energy is left in the CR2430 battery. A fresh battery shows 5 dots.
English The battery capacity and voltage NOTE: 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.
TIME & DATE -/DOWN +/UP -/DOWN ESC Altitude meter +/UP -/DOWN ESC LOG SEL ESC Logbook pages +/UP -/DOWN ESC Planner SEL ESC Planner pages +/UP -/DOWN ESC STOP watch SEL ESC STOP watch function +/UP -/DOWN ESC DIVE mode SEL ESC Dive settings & menus +/UP -/DOWN ESC SET SEL ESC Clock settings & menus +/UP 3.2.
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. barometric pressure is a variable, NOTE: changing with weather and atmospheric 3.2.3 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.
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, the 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.
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.
WARNING: By activating the stopwatch first time the display will be as shown above. if you have set ppO2max to OFF, the planner will allow depths up to maximum of 120m/394ft. Air/nitrox dives with high ppO2 are extremely dangerous and can lead to fatal injury. Be aware that exposures to high ppO2 will lead CNS clock value to exceed maximum recommended 100%. If MOD is shallower than NOTE: 9m/30feet, planning is not allowed and information LO MOD is shown.
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 reached by pressing + or - button until the indicator on the right shows: Dive, and then select this mode by pressing SEL.
DIVE mode However in SCUBA mode after a dive, the display may appear as shown below: -/DOWN +/UP SEL ESC - Suface interval time at top row - Remaining desaturationtime at middle row INTERVAL -/DOWN +/UP ESC SET GAS -/DOWN +/UP ESC SET SCUBA -/DOWN +/UP ESC SET APNEA -/DOWN +/UP ESC 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.
English The remaining nitrogen loading is shown in this display with the indicator on the right by starting from the first bar segment with N2. 4.2 Gas settings GAS -/DOWN +/UP SEL ESC SET GAS 4.2.1 Set gas 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%.
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. Diving with a ppO higher than NOTE: 1.4 is dangerous and may lead to 2 unconsciousness, drowning and fatal injury. 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.
SCUBA settings SET SCUBA 1m/5ft steps. The selection is confirmed by pressing SEL button. 4.3.2 -/DOWN +/UP SEL ESC Depth Alarm -/DOWN +/UP ESC Dive Time Alarm English 4.3 Maximum dive time alarm 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.
4.3.4 Setting the user preferred units The user may select between depth and temperature unit combinations. The effect takes place in dive mode, in the log book, alarm settings, altitude settings etc. 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. By pressing SEL button in this menu the temperature unit field value starts blinking.
By pressing the SEL button the following menu’s can be accessed. 4.4.1 Setting the depth incremental alarm English 4.4.2 By pressing the SEL button 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).
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. 4.5 SWIM mode If your Chromis has the swim mode enabled the following menu will be shown.
English By pressing SEL on the swim menu, you reach 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.
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.
No-stop time: calculated in real time and updated every 4 seconds. Maximum displayed no-stop times is 99 minutes. 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.
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. 4.7.1.
English 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 the top row. If decompression is already required this information remains at the bottom row.
You should not perform a dive as long as the no-dive warning is displayed on the computer screen. If the warning is prompted by microbubble accumulation (as opposed to CNS O2 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.
Diving with Nitrox 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. However, the increase in oxygen concentration in Nitrox implies an increase in oxygen partial pressure in the breathing mix at the same depth.
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. 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.
4.7.5.2 Altitude and the decompression algorithm 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. WARNING At altitude class 4 Chromis functions in gauge mode only (automatic switch from computer mode). You can check your current NOTE: altitude class and elevation by 4.7.5.3 English Atmospheric pressure is a function of altitude and weather conditions.
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 causes 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.
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 Alarms can not be turned off because they represent situations that do require immediate action by the diver. There are five different alarms: WARNING - When in gauge mode, all warnings and all alarms are OFF except for the low battery alarm.
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.
Low battery 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.
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 (after 1m/3feet ascent detected) 2. Temperature 3. Average depth 4. Current time of the clock on the bottom row, temperature on the top row. 4.9 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.
4.10 SWIM mode Chromis can be set to SWIM mode from any of the surface displays by long press +. Naturally the SWIM mode must have been activated from the corresponding menu. The SWIM mode operates NOTE: only on the surface. It will switch English 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.
5.2 Introduction to SCUBAPRO LogTRAK LogTRAK is the software that allows Chromis to communicate with a Windowsbased 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 -> Options -> download • Profile showing the graphical data of the dive.
Change warnings/settings of the Chromis and reading the computer information By selecting Extras -> Dive Computer settings you can enable/disable warnings that cannot be changed at Chromis unit via menus. Resolution in ft is always 1ft. Accuracy is within 2% ±0.2m/1ft. English 5.2.2 Decompression calculation range: • 0.
6.3 Replacing the battery in Chromis 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.
GLOSSARY AVG: Average depth, calculated from the beginning of the dive or from the time of reset. CNS O2: Central Nervous System oxygen toxicity. DESAT: Desaturation time. The time needed for the body to completely eliminate any nitrogen taken up during diving. Dive time: The time spent below a depth of 0.8m/3ft. Gas: Refers to the main gas that is set for the ZH-L8 ADT MB algorithm. Local time: the time in the local time zone. Max depth: Maximum depth reached during the dive.
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.
INDEX Active backlight All-silent mode Altimeter Ascent rate Backlight Battery Bookmarks Buttons Clock settings CNS O2 Date Desaturation Desaturation reset Dive planner Diving at altitude Flying after diving Gauge mode Logbook Maintenance MB levels Microbubbles MOD Mountain lakes No-dive warning Nitrox Nitrox reset No-fly time Oxygen concentration Oxygen partial pressure PC interface ppO2max Safety stop timer Log TRAK SOS mode Stopwatch Surface interval Technical information Time of day Time zone Units UTC