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Leonardo User Manual

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Leonardo User Manual Direction for use Computer Leonardo ENGLISH cressi.com 2 TABLE OF CONTENTS Main specifications page 4 TIME SET mode: General recommendations Date and time adjustment page 31 and safety measures page 5 SYSTEM mode: Introduction page 10 Setting of measurement unit and reset page 31 1 - COMPUTER CONTROL 3 - WHILE DIVING: COMPUTER Operation of the Leonardo computer page 13 FUNCTIONS 2 - BEFORE DIVING Diving within no decompression limits page 36 DIVE SET mode: DIVE AIR function: Setting of dive parameters page 16 Dive with Air page 37 Oxygen partial pressure (PO2) page 16 DIVE NITROX function: Nitrox - Percentage of the oxygen (FO2) page 18 Dive with Nitrox page 37 Dive Safety Factor (SF) page 22 Before a Nitrox dive page 37 Deep Stop page 22 Diving with Nitrox page 40 Altitude page 23 CNS toxicity display page 40 PLAN mode: PO2 alarm page 43 Dive planning page 27 Ascent rate page 45 GAGE mode: Safety Stop page 45 Depth gauge and timer page 27 Decompression forewarning page 46 Deep Stop page 46 3 Diving outside no decompression limits page 50 5 - CARE AND MAINTENANCE Omitted Decompression stage alarm page 51 Battery replacement page 71 GAGE MODE depth gauge and timer) page 52 6 - TECHNICAL SPECIFICATIONS Use of the computer with 7 - WARRANTY poor visibility page 56 4 - ON SURFACE AFTER DIVING Data display and management page 59 Surface interval page 59 PLAN function - Dive plan page 60 LOG BOOK function - Dive log page 61 HISTORY function - Dive history page 65 DIVE PROFILE function - Dive profile page 65 PCLINK function Pc compatible interface page 66 System Reset Reset of the instrument page 70 4 Congratulations on your purchase of your Leo - trox) dive. nardo underwater computer, a sophisticated • Full setting of FO2 (percentage of the oxy - and complete instrument, realized in order to gen) and PO2 (partial oxygen pressure) pa - offer you the utmost safety, efficiency, and re - rameters: PO2 may be set between 1.2 bar liability. and 1.6 bar, FO2 between 21% and 50%. • A Nitrox dive may be carried out after an Always keep this manual with your Leonardo. air dive (even with desaturation in pro - Main specifications. gress). • Possibility of Deco (decompressive compu - • The Leonardo features a new Cressi RGBM tations) or Gage program setting (depth agorithm, created in conjunction with the gauge and timer). expertise of Bruce Wienke and based on • Deep Stop can be enabled or disabled. the Haldane model, integrated with RGBM • Large display with ”PCD System” for per - factors. This algorithm allows for safe de - fect understanding and readability of values. compression calculations for multiple dives • Replaceable display protective cover. spread out over multiple days. • Battery replacement can be carried out by • Tissues: 9 with saturation hemi-phases bet - the user. ween 2.5 and 480 minutes; • Planning: Scrolling of the safety curve. • ”Dive” program: Full processing of dive • Unit of measure change from the metric sy - data, even with decompression (if any), for stem (meters and °C) to the feet system (ft- any air or hyper-oxygenated mixture (Ni - °F) by the user. 5 • Sound and visual alarm systems. ƽ WARNING: this instrument is designed • CNS oxygen toxicity graphic indicator. to be a dive aid and does not replace the • Backlit display. use of the dive tables. • Built-in calendar and clock. • Logbook (70 hours or 60 dives) including ƽ DANGER: AN UNDERWATER DI - dive profile. VING COMPUTER CAN NEVER • Dive history. COMPLETELY ELIMINATE THE RISK • The instrument may be fully reset, in case OF DECOMPRESSION SICKNESS of renting. (EMBOLISM). IT MUST BE CLEAR • PC/Mac interface with simulator and dive THAT AN UNDERWATER DIVING profile (optional). COMPUTER CAN NEVER COMPLE - TELY ELIMINATE THE RISK OF DE - GENERAL RECOMMENDATION AND COMPRESSION SICKNESS. IN FACT, SAFETY MEASURES THE COMPUTER CANNOT TAKE ƽ WARNING: please read the instructi - INTO ACCOUNT THE PHYSICAL CONDITIONS OF THE DIVER ons! Read carefully this handbook, including WHICH MAY VARY DAILY. IT IS RE - the safety measures paragraphs. Please be COMMENDED THAT A MEDICAL EX - sure of perfectly understanding your instru - AMINATION IS COMPLETED PRIOR ment’s use, functions and limits before using TO COMMENCING ANY UNDERWA - it! DO NOT use your instrument without TER DIVING ACTIVITY, AND TO AS - reading every part of this handbook! 6 SESS ONE’S OWN PHYSICAL CON - a dive’s safety is only guaranteed by a cor - DITION BEFORE EACH DIVE. CIR - rect preparation. CUMSTANCES SUCH AS COLD ƽ WARNING: The Leonardo computer WATER TEMPERATURE (LESS THAN 50F), POOR PHYSICAL CONDITION, by Cressi is designed for sport diving only. It MULTIPLE DIVES IN SUBSEQUENT is not intended for commercial or profes - DAYS, WEARINESS, USE OF ALCO - sional use, requiring longer dive times and HOL, DRUGS, OR MEDICATION greater depths. Diving beyond the parame - AND DEHYDRATION MAY IN - ters of sport diving dramatically increases CREASE THE RISK OF DECOMPRES - the risk of decompression sickness. SION SICKNESS. PLEASE AVOID ALL ƽ WARNING: Before using the compu - THESE SITUATIONS AS WELL AS ter, please check the battery life status and ANY OTHER THAT MIGHT ENDAN - the visibility of the LCD display. DO NOT GER YOUR LIFE: EVERYONE HAS TO dive if the instruments’ indications are not BE RESPONSIBLE FOR ONE’S OWN perfectly clear and, first of all, if the battery SAFETY! is low. ƽ WARNING: this instrument should be ƽ WARNING: While diving, be equipped used only by properly trained and certified with a depth gauge, a manometer, a diving divers. No computer will replace proper timer or watch and dive tables. Please always underwater training. Please remember that check your diving cylinders’ pressure to be fit 7 to the planned dive and, while diving, often ƽ WARNING: the present instrument’s check the cylinders’ air capacity by means of use is strictly personal; the information it your manometer. supplies refer, in fact, exclusively to the in - ƽ DANGER: DO NOT DIVE AT HIGH dividual who has used it during a dive or a ALTITUDES BEFORE SETTING THE series of dives. CORRECT ALTITUDE. ONCE SET, ƽ DANGER : CRESSI DOES NOT RE - PLEASE CHECK THE ALTITUDE COMMEND THE USE OF THIS IN - LEVEL ON THE DISPLAY. PLEASE RE - STRUMENT IN DECOMPRESSION MEMBER THAT DIVING AT HIGHER DIVES. IF, FOR ANY REASON, THE NO ALTITUDES THAN 9.842 FT. ABOVE DECOMPRESSION LIMITS HAVE BEEN SEA LEVEL INVOLVES A REMARKA - EXCEEDED, THE CRESSI COMPUTER BLE INCREASED RISK OF DECOM - WILL DISPLAY THE INFORMATION PRESSION SICKNESS. RELATED TO DECOMPRESSION, SUR - ƽ DANGER: BEFORE EMBARKING FACING AND SURFACE INTERVAL ON A FLIGHT, PLEASE WAIT UNTIL TIMES. THE ICON "NO FLY TIME" ON YOUR COMPUTER DISPLAY HAS DISAP - PEARED. 8 ƽ WARNING: Do not dive using Nitrox POSE THE DIVER TO DIFFERENT mixtures without checking the contents and RISKS THAN THOSE OF AIR DIVES, correct O2 percentage (FO2). After doing INCLUDING SERIOUS PHYSICAL so, set your computer with the mixture(s)’ DAMAGES AND, IN EXTREME value so that it may process the decom - CASES, EVEN DEATH. pression computations. Please be advised ƽ DANGER : AS A SAFETY MEASURE that the computer only accepts FO2 values THE COMPUTER UTILIZES A PO2 SET to the nearest whole number. AT 1.4 BAR EVEN FOR AIR DIVES. IF IT ƽ WARNING: Before diving, check in - IS NECESSARY TO INCREASE THE strument parameter settings. SAFETY MARGIN, IT IS POSSIBLE TO SET PO2 TO LOWER VALUES, UP TO ƽ DANGER: Leonardo always keeps 1.2 BAR, BY DECREMENTS OF 0.1 BAR. the latest oxygen setting set. It is very ƽ important for diver's safety to always WARNING: after a dive with Leonardo check this parameter before each dive. set in Gage mode (depth gauge-timer), the instrument will not make saturation and de- ƽ DANGER: CRESSI DISCOURAGES saturation computations during the subse - NITROX DIVES WITHOUT PROPER quent 48 hours. TRAINING. NITROX DIVES WILL EX - 9 ƽ WARNING: avoid any dive presenting ƽ WARNING: please utilize the most con - very risky profiles, such as "yo-yo" dives, servative safety factor any time you are dives with reversed profiles or several sub - aware of factors that might increase the risk sequent dives during subsequent days, since of decompression sickness. By doing so, you they are potentially dangerous and present will dive more conservatively and safety. a higher risk of decompression sickness! NOTE: while flying, the instrument must ƽ WARNING: Currently, no validated be stored in the pressurized cabin. scientific literature allows to dive more than NOTE: Cressi reminds that all sport dives twice a day for periods of one or more weeks must be conducted within the no decom - without the risk of decompression sickness. pression limits and at a maximum depth of For your own safety, it is important to avoid 132 ft, limit of sport dives. Exceeding these diving for more than two times a day. limits dramatically increases the likelihood A rest of at least 2 hours between two sub - of decompression sickness. sequent dives is mandatory. The next/repeti - tive dive shall be shallower and its minimum duration shall be 15 minutes. 10 As a result of technological advancements, Introduction. Cressi reserves the right to modify the instru - ment without notification. The Leonardo computer by Cressi is a multi - functional instrument for sport diving. It will supply any wanted information on depth, dive times, decompression status, ascent rate and surface interval times between dives. Nitrogen absorption and release is continuously proces - sed by its sophisticated software, taking into account the quantity of inert in the different mixtures which can be used. Such information is displayed on the instrument’s large display, thanks to the PCD (Priority Compartment Digit Display) System, allowing an easy and di - rect “dialogue” between the diver and the computer, ensuring a clear understanding of all the data needed at any given time and a per - fect readability in any situation.
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