User manual CRESSI LEONARDO

[. . . ] LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:10 Pagina 1 Direction for use Computer Leonardo ENGLISH cressi. com LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:10 Pagina 2 2 TABLE OF CONTENTS Main specifications General recommendations and safety measures Introduction page 4 page 5 page 10 TIME SET mode: Date and time adjustment page 31 SYSTEM mode: Setting of measurement unit and reset page 31 1 - COMPUTER CONTROL Operation of the Leonardo computer page 13 3 - WHILE DIVING: COMPUTER FUNCTIONS Diving within no decompression limits DIVE AIR function: Dive with Air DIVE NITROX function: Dive with Nitrox Before a Nitrox dive Diving with Nitrox CNS toxicity display PO2 alarm Ascent rate Safety Stop Decompression forewarning Deep Stop page 36 page 37 page 37 page 37 page 40 page 40 page 43 page 45 page 45 page 46 page 46 2 - BEFORE DIVING DIVE SET mode: Setting of dive parameters Oxygen partial pressure (PO2) Nitrox - Percentage of the oxygen (FO2) Dive Safety Factor (SF) Deep Stop Altitude PLAN mode: Dive planning GAGE mode: Depth gauge and timer page 16 page 16 page 18 page 22 page 22 page 23 page 27 page 27 LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:10 Pagina 3 3 Diving outside no decompression limits page 50 Omitted Decompression stage alarm page 51 GAGE MODE depth gauge and timer) page 52 Use of the computer with poor visibility page 56 5 - CARE AND MAINTENANCE Battery replacement page 71 6 - TECHNICAL SPECIFICATIONS 7 - WARRANTY 4 - ON SURFACE AFTER DIVING Data display and management Surface interval PLAN function - Dive plan LOG BOOK function - Dive log HISTORY function - Dive history DIVE PROFILE function - Dive profile PCLINK function Pc compatible interface System Reset Reset of the instrument page 59 page 59 page 60 page 61 page 65 page 65 page 66 page 70 LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:10 Pagina 4 4 Congratulations on your purchase of your Leonardo underwater computer, a sophisticated and complete instrument, realized in order to offer you the utmost safety, efficiency, and reliability. Always keep this manual with your Leonardo. Main specifications. • The Leonardo features a new Cressi RGBM agorithm, created in conjunction with the expertise of Bruce Wienke and based on the Haldane model, integrated with RGBM factors. This algorithm allows for safe decompression calculations for multiple dives spread out over multiple days. • Tissues: 9 with saturation hemi-phases between 2. 5 and 480 minutes; • ”Dive” program: Full processing of dive data, even with decompression (if any), for any air or hyper-oxygenated mixture (Ni- trox) dive. [. . . ] 14) PRESS PRESS AND HOLD PRE DIVE LIGHT AUTOMATIC RETURN NITROX (im. 15) PRESS PRE DIVE PRESS AND HOLD LIGHT AUTOMATIC RETURN LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:11 Pagina 40 40 ƽ DANGER: Do not dive with cylinders containing Nitrox mixtures without checking their oxygen percentage. ƽ WARNING: : Check the FO2 value set on the computer prior to diving!This is done on surface by means of the main screen PRE-DIVE and the DIVE SET screen which allow visualization of the previously set parameters. ƽ WARNING: Under the same dive conditions, a Nitrox mixture requires longer no decompression times than air. It is recommended to comply with the maximum depth allowed by the selected Nitrox mixture. DIVING WITH NITROX During a Nitrox dive within the no decompression limits, all the information related to the a standard dive with air will be provided, as well as (picture 16): 1) NITROX dive indicator 2) Graph representing CNS O2 toxicity level The second screen, after pressing the button, displays the same settings as the DIVE AIR but, of course, concerning the nitrox mixture used. CNS TOXICITY DISPLAY The Leonardo Cressi computer is able to display a graph of the oxygen toxicity level for the Central Nervous System. The toxicity level is related to the partial oxygen pressure and to the time of the diver's exposure to high partial oxygen pressure (PO2). The picture 16 represents the display column, consisting of a 5-segment bar, which shows the increasing amount of accumulated oxygen. When all the segments are LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:11 Pagina 41 41 lit up, 100% of the maximum tolerance allowable to the CNS has occurred and serious danger of hyperoxia exists. It is important to understand, monitor, and control the oxygen toxicity level. In order to reduce the risk of oxygen toxicity, Leonardo displays a graphic bar, easy to read in any situation. When the oxygen level reaches warning values, next to the maximum allowable toxicity (corresponding to 5 segments out of 5 lit up), the graph starts flashing along with the Nitrox writing, and a temporary alarm starts sounding, showing the proximity of a CNS toxicity level. If the situation remains unchanged or worsens (100% of allowable toxicity), the bar and the writing continue to flash and the temporary sound alarm is repeated until, ascending, the partial oxygen pressure decreases below 0. 6 atmospheres. The graph stops flashing, yet the alarm is entered in the Logbook. NOTE: The result of the oxygen exposure computation is approximated to the nearest whole number. ƽ DANGER: do not use hyper-oxygenated mixtures in diving or decompression without having attended the related training courses. The Nitrox Basic license enables to use just the standard hyper-oxygenated mixtures (Ean 32 and Ean 36, respectively called Nitrox 1 and Nitrox 2), within the non decompression limits. LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:11 Pagina 42 42 CNS TOXICITY DISPLAY (im. 16) PRESS PRE DIVE LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:11 Pagina 43 43 PO2 ALARM (im. 17) The computer is able to constantly monitor another basic parameter relating to oxygen, that is O2 partial pressure value (PO2). Oxygen toxicity may be caused both by an excessive exposure (CNS toxicity, seen in the previous chapter) and by exceeding the maximum Po2, which is exceeding the maximum depth allowed by the mixture used. As already seen, the PO2 limit value is set by the diver in a range between 1. 2 bar and 1. 6 bar. Leonardo considers the 1. 6 bar value as the partial pressure maximum allowable limit and, according to the used mixture, automatically signals the maximum depth which may be reached. Remember that even by using air, you may reach the oxygen toxicity limit. [. . . ] How to avail of the warranty services If you want to submit a claim according to this limited warranty, contact your Cressi authorized dealer for information about claim submission; information will be provided about how to request the application of the warranty to your product. If you want to return the product by shipping it to your authorized Cressi dealer, make sure that shipping is prepaid. The validity of the claims submitted according to this limited warranty is subject to notification to LEONARDO LIBRETTO 105X80 INGLESE:Layout 1 7-06-2011 10:11 Pagina 77 77 Cressi or to a Cressi authorized service centre of the alleged defect within a reasonable time form its observation, however not beyond the expiry of the warranty period. For any claim, based on this limited warranty, it is necessary as well to provide one's name and address, the purchase proof which shall clearly indicate the name and address of the seller, the date and place of purchase and the type of product. [. . . ]