Cressi Leonardo Directions For Use Manual
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Cressi Leonardo Directions For Use Manual

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Direction for use
Computer Leonardo
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  • Page 1 Direction for use Computer Leonardo ENGLISH cressi.com...

  • Page 2: Table Of Contents

    Setting of measurement unit and reset page 31 1 - COMPUTER CONTROL 3 - WHILE DIVING: COMPUTER FUNCTIONS Operation of the Leonardo computer page 13 Diving within no decompression limits page 36 2 - BEFORE DIVING DIVE AIR function: DIVE SET mode:...
  • Page 3 Diving outside no decompression limits page 50 5 - CARE AND MAINTENANCE Omitted Decompression stage alarm page 51 Battery replacement page 71 GAGE MODE 6 - TECHNICAL SPECIFICATIONS depth gauge and timer) page 52 7 - WARRANTY Use of the computer with poor visibility page 56 4 - ON SURFACE AFTER DIVING...

  • Page 4: Main Specifications

    (even with desaturation in pro- gress). Main specifications. • 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 •...

  • Page 5: General Recommendations And Safety Measures

    • Sound and visual alarm systems. 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. DANGER: AN UNDERWATER DI- •...
  • Page 6 CUMSTANCES SUCH AS COLD WARNING: The Leonardo computer WATER TEMPERATURE (LESS THAN by Cressi is designed for sport diving only. It 50F), POOR PHYSICAL CONDITION, is not intended for commercial or profes- MULTIPLE DIVES IN SUBSEQUENT sional use, requiring longer dive times and DAYS, WEARINESS, USE OF ALCO- greater depths.
  • Page 7 DANGER: DO NOT DIVE AT HIGH series of dives. ALTITUDES BEFORE SETTING THE CORRECT ALTITUDE. ONCE SET, 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.
  • Page 8 DANGER: Leonardo always keeps 1.2 BAR, BY DECREMENTS OF 0.1 BAR. the latest oxygen setting set. It is very WARNING: after a dive with Leonardo important for diver's safety to always set in Gage mode (depth gauge-timer), the check this parameter before each dive.
  • Page 9 WARNING: Currently, no validated 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.

  • Page 10: Introduction

    As a result of technological advancements, Introduction. Cressi reserves the right to modify the instru- The Leonardo computer by Cressi is a multi- ment without notification. 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.
  • Page 11 (logbook), as well as a dive si- The Leonardo computer by Cressi is a multi- mulator. The mathematical model of Leonardo functional instrument for sport diving. It will can make saturation and desaturation compu- supply any wanted information on depth, dive...
  • Page 12 tations of dives carried out both with air and with Nitrox, whose parameters can all be set: from the maximum allowed PO2 value (bet- ween 1.2 bar and 1.6 bar), to the mixture’s oxygen percentage (FO2) between 21% and 50% of O2. Additionally, the instrument may be set by the user for either metric (m-°C) or feet system (ft-°F).

  • Page 13: Computer Control Operation Of The Leonardo Computer

    - Dive Safety Factor (SF/0/1/2) COMPUTER - Altitude level (if set) - GAGE function (if set) Leonardo is provided with a user friendly dis- - Battery charge level play, which “escorts” the diver during any ope- - Current time ration. Leonardo’s screen different modes...
  • Page 14 4) PLAN: For dive planning To access the menu of these screens (ex- 5) GAGE: It is the third dive function of the cept history and pclink) press and hold computer. It acts just as timer and depth the button. Pressing and releasing the gauge.
  • Page 15 PRE DIVE SCREENS PRE DIVE SCREENS NITROX PRESS PRESS LIGHT LIGHT HOLD HOLD (im. 1) (im. 2) PRE DIVE PRE DIVE COMPUTER MENUS (im. 3)

  • Page 16: Before Diving

    DIVE SET (DIVE-S) mode, which (PO2) enables to select the dive parameters related to: (im. 4) Leonardo is factory set with a Partial Oxygen Partial Oxygen Pressure (PO2) Pressure (PO2) value of 1.4 bar for both air Nitrox-Percentage or Fraction of oxygen...
  • Page 17 minimum of 1.2 bar. Just press the central but- WARNING: the computer maintains ton up to the DIVE SET mode, displayed in the the PO2 setting until it is manually reset by picture 5, then press and hold the button to the diver on different values.

  • Page 18: Nitrox - Percentage Of The Oxygen (Fo2)

    (Dive Air Program), with fraction of oxygen at 21%, or oxygen enriched NOTE: The Leonardo computer is factory (Dive Nitrox Program). set on the DIVE AIR program, with the Ni- To set the correct percentage of the Oxygen trox mixture set to Fo2 at 21%.
  • Page 19 SETTING OF PARTIAL OXYGEN PRESSURE - PO2 PRESS PRESS (im. 4) PRESS PRESS HOLD HOLD AUTOMATIC RETURN PRIMARY MENU SECONDARY MENU TERTIARY MENU TERTIARY MENU When the computer issues a sound signal, it means that the setting has been stored, then it automatically goes back to the previous menus.
  • Page 20 SETTING OF NITROX FO2 MIXTURE PRESS PRESS PRESS PRESS PRESS HOLD HOLD PRIMARY MENU SECONDARY MENU TERTIARY MENU TERTIARY MENU SET THE DESIRED (im. 5) PERCENTAGE PRESS WAIT FOR SECONDS AUTOMATIC RETURN PRIMARY MENU When the computer issues a sound si- SECONDARY MENU gnal, it means that the setting has been stored, then it automatically...
  • Page 21 NOTE: by varying the PO2 set, the com- DANGER: Leonardo always keeps puter indicates the maximum depth which the latest oxygen setting set. It is very may be reached with that mixture. important for diver's safety to always check this parameter before each dive.

  • Page 22: Dive Safety Factor (Sf)

    DEEP STOP , while others do not contemplate this type of decompression pro- WARNING: Enable and set a higher file. Leonardo is factory set on DEEP STOP . If safety factor (SF2/SF3) whenever you are you want to disable it, just press the button until...

  • Page 23: Altitude

    ALT. 0 (no mountain) - da 0 a 700 m DANGER: Leonardo does not auto- ALT. 1 (1 mountain) - da 700 a 1500 m matically handle dives at a location ALT. 2 (2 mountains) - da 1500 a 2400 m above sea level.
  • Page 24 SAFETY FACTOR SETTING PRESS PRESS PRESS PRESS PRESS HOLD HOLD PRIMARY MENU SECONDARY MENU SECONDARY MENU TERTIARY MENU PRESS WAIT FOR (im. 6) TERTIARY MENU SECONDS...
  • Page 25 DEEP STOP ON/OFF PRESS PRESS PRESS PRESS PRESS HOLD HOLD PRIMARY MENU SECONDARY MENU SECONDARY MENU TERTIARY MENU PRESS WAIT FOR (im. 7) TERTIARY MENU SECONDS...
  • Page 26 ALTITUDE SETTING PRESS PRESS PRESS PRESS PRESS HOLD HOLD PRIMARY MENU SECONDARY MENU SECONDARY MENU TERTIARY MENU PRESS WAIT FOR TERTIARY MENU SECONDS (im. 8)

  • Page 27: Plan Mode: Dive Planning

    The computer is provided with a third pro- ring the surface interval between two or more gram called GAGE (depth gauge and timer) subsequent dives; in such case, Leonardo takes that may be used for both apnea (free divers) into account the residual nitrogen, therefore divers and for the use in technical dives.
  • Page 28 48 hours. increases the risk of decompression sickness! DANGER: Should you decide to WARNING: The Leonardo computer reset the instrument by accessing the is designed for sport diving only. It is not in- system mode, the nitrogen memory tended for commercial or professional use, will be cancelled.
  • Page 29 PLAN mode is disabled. NOTE: The Leonardo computer is factory set on the “DIVE AIR” function. NOTE: The depth indicator gives indicati- ons between 0 – 393 ft.

  • Page 30: Gage Mode

    PLAN MODE (im. 9) PRESS PRESS PRESS PRESS HOLD WAIT FOR PRIMARY MENU SECONDARY MENU SECONDARY MENU SECONDARY MENU SECONDS GAGE MODE PRESS (im. 10) PRESS PRESS HOLD WAIT FOR PRIMARY MENU SECONDARY MENU SECONDARY MENU SECONDS...

  • Page 31: Time Set Mode

    (im. 11) (im.12) Press the button up to the TIME SET mode. The Leonardo computer can make computati- Press and hold the button to enter the mode. ons by metric units (depth in meters and tem- The digits of the year start flashing, press again perature in °C), or in feet and temperature in...
  • Page 32 Instrument reset. (im. 13) DANGER: Do not reset your instru- ment if it has to be used to compute To reset the instrument, press the button up subsequent dives! to the SYSTEM mode, then press and hold to enter the mode. “s.unit” (set units) is displayed with the indication °C/m.
  • Page 33 TIME SET MODE (im. 11) PRESS PRESS PRESS PRESS PRESS HOLD HOLD PRIMARY MENU SECONDARY MENU SECONDARY MENU TERTIARY MENU PRESS AUTOMATIC RETURN TERTIARY MENU SECONDARY MENU PRIMARY MENU...
  • Page 34 SYSTEM MODE: SETTING OF MEASUREMENT UNIT (im. 12) PRESS PRESS PRESS PRESS HOLD HOLD AUTOMATIC RETURN PRIMARY MENU...
  • Page 35 SYSTEM MODE: INSTRUMENT RESET (im. 13) PRESS PRESS PRESS PRESS PRESS HOLD HOLD PRIMARY MENU SECONDARY MENU SECONDARY MENU PRESS PRESS PRESS PRESS HOLD HOLD AUTOMATIC SECONDARY MENU RETURN...

  • Page 36: While Diving Computer Functions

    4) Elapsed dive time (Dive.T min.). compression computation. 5) Ascent rate indicator. NOTE: The Leonardo computer is factory 6) Indicator of altitude level (if set) set on the DIVE AIR program, with the mix- 7) Current temperature, expressed in °C or °F .

  • Page 37: Dive Air Function: Dive With Air

    Nitrox (im. 15) BEFORE A NITROX DIVE. The Leonardo computer keeps the setting of The Leonardo computer always keeps the DIVE the percentage of Oxygen Fo2, until the diver AIR program switched on, until the diver sets it manually resets it to different values.
  • Page 38 sary to set the computer with the exact values of oxygen percentage (FO2) contained in the cy- linder to be used during the dive, after having meticulously analysed its content, so the com- puter is able to adapt its computing algorithm ac- cording to the new parameters..
  • Page 39 WHILE DIVING PRESS PRE DIVE PRESS AUTOMATIC LIGHT RETURN HOLD NITROX PRESS PRE DIVE PRESS LIGHT AUTOMATIC HOLD RETURN...

  • Page 40: Diving With Nitrox

    WARNING: Under the same dive con- CNS TOXICITY DISPLAY ditions, a Nitrox mixture requires longer no The Leonardo Cressi computer is able to display decompression times than air. It is recom- a graph of the oxygen toxicity level for the Cen- mended to comply with the maximum tral Nervous System.
  • Page 41 DANGER: do not use hyper-oxyge- trol the oxygen toxicity level. In order to reduce nated mixtures in diving or decom- the risk of oxygen toxicity, Leonardo displays a pression without having attended the graphic bar, easy to read in any situation. When related training courses.
  • Page 42 CNS TOXICITY DISPLAY (im. 16) PRESS PRE DIVE...

  • Page 43: Po2 Alarm

    PO2 limit value is set by the diver in ring the residual part of the dive, in the LOG a range between 1.2 bar and 1.6 bar. Leonardo BOOK and in the PRE DIVE screen. considers the 1.6 bar value as the partial pres-...

  • Page 44: Po2 Alarm

    PO2 ALARM (im. 17) PRESS PRE DIVE LOG BOOK...

  • Page 45: Ascent Rate

    (im. 18) (im 19) The ascent rate is shown on the display by an Leonardo is programmed to automatically si- arrow indicator at the centre, operating ac- gnal a safety stop after each dive at a depth cording to the table on the picture 18: If, du- greater than 32 ft., as recommended by the...

  • Page 46: Decompression Forewarning

    Every time the time available within the curve, button. shown on the display by the NO DECO icon, decreases to 3 minutes, Leonardo warns the DANGER: At the end of the safety diver. The digit with the remaining minutes and...
  • Page 47 If the diver omits it, the warnings will be dele- ted and the computer recalculates ascent plan- ning without that stop. NOTE: verify that the deep stop is enab- led (see the paragraph at page 22). NOTE: In this case, the maximum depth can be displayed pressing the button.

  • Page 48: Safety Stop

    ASCENT RATE (im. 18) DEPTH NO SIGNAL 0.0-3.9 m/min 4.0-7.9 m/min 8.0-11.9 m/min 12.0 m/min SAFETY STOP (im. 19) PRESS PRESS LIGHT HOLD...
  • Page 49 DECOMPRESSION FOREWARNING (im. 20) DEEP STOP (im. 21) PRESS PRESS LIGHT HOLD...

  • Page 50: Diving Outside No Decompression Limits

    In the event that you have exceeded the no de- PLUS the stop time at that depth and at any compression limits, Leonardo will assist with other subsequent stop (including the deep specific information related to surfacing and re- stop if necessary), PLUS the safety stop time, lated decompression information.

  • Page 51: Omitted Decompression Stage Alarm

    20 ft., even though decompression this time, the alarm will keep sounding. In the will take slightly longer. Leonardo will auto- event that the diver does not descend to the matically calculate this.

  • Page 52: Depth Gauge And Timer)

    (depth gauge/timer). (im. 24) ting and the stop icon with the up arrow flash. The Leonardo computer is equipped with a This means that the decompression stage has third dive computing program (GAGE). This been omitted during the last dive. The LOG...
  • Page 53 DECOMPRESSION WARNING (im. 22) PRESS PRESS LIGHT HOLD NITROX PRESS PRESS LIGHT HOLD...

  • Page 54: Omitted Decompression Stage Alarm

    OMITTED DECOMPRESSION STAGE ALARM (im. 23) Deco depth not respected: Deco depth not respected: lower depth. upper depth. PRE DIVE LOG BOOK...
  • Page 55 If the GAGE function is enabled, the computer, WARNING: Leonardo is designed for if it has not been switched on with the button, sport diving only. It is not intended for com- automatically activates at depths below 4 ft. sho-...

  • Page 56: Use Of The Computer With Poor Visibility

    USE OF THE COMPUTER WITH POOR WARNING: The computer will not VISIBILITY (im. 25) perform any saturation and de-saturation computation during the remaining 48 hours During your diving activity, light condition may elapsing from the end of the dive perfor- not allow easy reading of the display, therefore, med with the GAGE function.
  • Page 57 GAGE FUNCTION (im. 24)
  • Page 58 BACKLIGHT WHILE DIVING (im. 25) PRESS LIGHT HOLD NITROX PRESS LIGHT HOLD...

  • Page 59: On Surface After Diving

    4 ft., the display of the major organizations which study di- provides the following information: ving and hyperbaric medicine, Leonardo ap- plies the no flight times as follows: 12 hours 1) Surface interval given in hours and minutes after a single dive without decompression.

  • Page 60: Plan Function - Dive Plan

    NOTE: Should a dive begin with less than 2 performed, changing the curve times and ma- minutes of surface interval time, Leonardo king them shorter than those indicated for the will consider this a continuation of the pre- first dive.

  • Page 61: Log Book Function - Dive Log

    (im. 28 - 29) • Dive's year, month, and day. Leonardo by Cressi stores data about the la- test 60 dives or 70 hours elapsed with the • Dive number: the most recent dive’s infor- functions DIVE AIR, DIVE NITROX and mation are given first.
  • Page 62 • Indicator of CNS O2 toxicity at the end of a dive with program DIVE AIR or DIVE NI- TROX. • The display will display all icons relating to the alarms which have possibly engaged during the dive, such as: PO2 (PO2 alarm), SLOW (maximum ascent rate alarm) and so on.
  • Page 63 SURFACE INTERVAL (im. 26) PRESS LIGHT HOLD NITROX...
  • Page 64 PLAN FUNCTION (im. 27) PRESS PRESS PRESS PRESS HOLD PRIMARY MENU SECONDARY MENU SECONDARY MENU PRESS AUTOMATIC RETURN SECONDARY MENU...

  • Page 65: History Function - Dive History

    HISTORY FUNCTION - DIVE HI- DIVE PROFILE FUNCTION - DIVE STORY PROFILE (im. 30) The computer is equipped with a dive history The detailed profile of the dives can be viewed memory for DIVE AIR, DIVE NITROX, and by means of the software of the interface. A PC GAGE dives.

  • Page 66: Pclink Function Pc Compatible Interface

    PCLINK FUNCTION - PC COMPATI- BLE INTERFACE Using the PC link function with the PC button, the Cressi Leonardo connects with your perso- nal computer using an interface that you may purchase as a separate accessory. The interface will allow you to download and print all availa-...

  • Page 67: Log Book

    LOG BOOK (im. 28) PRESS PRESS PRESS PRESS after 20 sec. HOLD HOLD PRIMARY MENU SECONDARY MENU SECONDARY MENU TERTIARY MENU after 20 sec. AUTOMATIC RETURN SECONDARY MENU after 20 sec.
  • Page 68 NITROX (im. 29) PRESS PRESS PRESS HOLD HOLD AUTOMATIC RETURN PRIMARY MENU SECONDARY MENU TERTIARY MENU after 20 sec. PRIMARY MENU...
  • Page 69 HISTORY PCLINK (im. 30) PRESS PRESS...

  • Page 70: System Reset Reset Of The Instrument

    SYSTEM RESET - RESET OF THE IN- 5 - CARE AND MAINTENANCE. STRUMENT Leonardo by Cressi has been designed to ope- By resetting the instrument, all the computati- rate in extreme conditions with extensive un- ons related to the current de-saturation are derwater use.

  • Page 71: Battery Replacement

    After battery repla- have it checked by an authorized Cressi re- cement, all settings go back to the latest tailer. value set by the user. Time and date must be reset.
  • Page 72 ment). Before closing the cover, check that there is no soiling on its seat and apply a thin layer of silicone grease to battery cover seal. NOTE: Different factors affect the battery life. For example: time of storage before ac- quiring the instrument, dive time, use of back- light, battery’s quality (whose average life depends on temperature and other factors).
  • Page 73 RUN-DOWN BATTERY WARNING (im. 31)

  • Page 74: Technical Specifications

    6 - TECHNICAL SPECIFICATIONS. THERMOMETER: - Resolution: 1 °F Algorithm: CRESSI RGBM algorithm. - Measuring field: 23 °F + 104 °F Sample tissues: 9 with saturation hemi-pha- - Precision: +/- 35.6 °F/10min change °T ses between 2.5 and 480 minutes...
  • Page 75 Union, in Iceland, Norway, Switzerland and Tur- the statutory rights granted to the consumer by key and if Cressi has originally foreseen the sale the applicable National Laws concerning the of the product in one of these countries, this li- sales of consumer products.
  • Page 76 B) one year for consumables and accessories, in- If you want to return the product by shipping it cluding, but not limited to, watchbands, buckles, to your authorized Cressi dealer, make sure that etc. (either in bundle with the underwater com- shipping is prepaid.
  • Page 77 The request of repair under warranty will be sa- The Product or part of it, when replaced, will tisfied free of charge by Cressi or by a Cressi aut- become property of Cressi. In case a refund is horized service centre, according to their...
  • Page 78 Cressi or by using the pro- shocks, etc.) c) defects or damages due to duct differently from the intended use;...
  • Page 79 1. if the Product has been opened, changed or AND EXCLUSIVE APPEAL INSTRUMENT repaired by personnel not belonging to AVAILABLE FOR THE PURCHASER AND RE- Cressi or a Cressi service centre; PLACES ANY OTHER WARRANTY, EITHER 2. if the Product has been repaired using non EXPLICIT OR IMPLICIT.
  • Page 80 SULTING FROM BREACH OF WARRANTY OR CONTRACT, NEGLIGENCE, ABSOLUTE RESPONSIBILITY OTHER LEGAL MEANS, EVEN IF CRESSI KNEW THE PRO- BABILITY OF SUCH DAMAGES. CRESSI SHALL NOT BE LIABLE FOR DELAYS IN THE PROVISION OF THE SERVICE TO WHICH THIS LIMITED WARRANTY REFERS OR OF THE IMPOSSIBILITY OF USE DU- RING THE PRODUCT REPAIR PERIOD.
  • Page 82 Note:...
  • Page 84 Via Gelasio Adamoli, 501 - 16165 - Genova - Italia Tel. (0) 10/830.79.1 - Fax (0) 10/830.79.220 E.mail: info@cressi-sub.it www.cressi.com...

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