Cressi Archimedes II Wrist Computer

The second version of the Archimede computer, with its renewed look, has new sophisticated software that is able to manage two different Nitrox mixes during a dive, thus allowing you to choose at any time during the same dive.  

The features of Archimede, which were already outstanding, have been considerably improved for scuba divers and free divers as well as technical divers, who will find the new GAUGE function an indispensable instrument for precise monitoring of all their dives.        
 

Archimede 2 is, first of all, an intuitive computer that is easy to use, both for the beginner and the professional. Although it has many functions you are not obliged to use them. Once the computer has been set for the use of air it does not require any further adjustment for subsequent dives as the computer activates automatically upon contact with the water and is perfectly able to calculate any dive, with or without decompression, in total automatism.

However, even the most demanding divers have been taken into consideration, those who use Nitrox mixes and want to de-saturate in greater safety, by using Nitrox mixes whilst ascending, or who want to use the instrument during free diving or technical dives.   

The new software analyzes the data of 12 sample tissues (previously 9) for even more accurate monitoring of tissue saturation and de-saturation mechanisms.   

The possibility of being able to use a second Nitrox mix during the same dive has now been introduced to faithfully monitor and assist those divers that prefer de-saturation with Nitrox mixes, a practice that offers greater safety to the dive and that is used by an increasingly large number of enthusiasts. 

The first mix can contain a percentage of oxygen ranging from 21% (air) to 50%, the second between 21% and 99% (pure oxygen). The fraction of oxygen of both mixes is set on the surface, whilst the use of the two different mixes can be chosen at any time during the dive.
Naturally, the partial pressure of both of the mixes can also be selected in a wide range of between 1.0 and 1.6 bar.

Other new functions include the maximum depth indicator, which is now visible during decompression; the choice of three different Safety Factor levels; the ascent speed indicator (expanded); the temperature sensor (faster) and the display back-lighting (clearer). 

Lastly, the all new GAUGE function, used both for free diving and technical dives, which selects just some of the instrument’s functions, such as instant and maximum depth, duration of the dive (in minutes and seconds), time and ascent speed. The operating range of the GAUGE function reaches depths of up to 200 metres.
(not available for Windows Vista or Windows 7)

Technical features

• Bühlmann ZH-L8 algorithm, redesigned by Randy Bohrer
• Tissues: 12 with saturation half-times that range between 5 and 640 minutes
• Salt water calibration
• Range of measurement: 0 - 99.9 m (0-199.9 in Gauge function)
• Maximum surface time: 48 h
• Altitude range: from 0 to 6000 m
• 3V CR 2032 battery which can be replaced by the user as it is easy to find at a low cost.
• Battery lifetime: approximately 2 years at 50 dives/year
• Display is back lit for 5 seconds (by pressing a button)
• Replaceable protective screen for the display
• Possibility of use with air or Nitrox mix (choice between 2 different mixes during the same dive)
• Adjustment of oxygen fraction from 21% to 50% with increments of 1% for the first mix and from 21% to 99% for the second mix
• Partial oxygen pressure adjustment from 1.0 to 1.6 bar, with increments of 0.1 bar for each of the mixes
• Possibility of inserting a personal safety factor, which can be selected on 3 positions.
• Possibility of inserting an alarm upon reaching a pre-established depth.
• Bar graph for nitrogen saturation
• Bar graph for CNS oxygen toxicity
• Indicator of ascent speed at 4 levels
• Audio and visual alarms
• Decompression stops foreseen up to a depth of 30 m
• Safety stop of 3’ at the end of every dive that exceeds a depth of 10 m (not compulsory)
• Date and time incorporated
• Gauge function (only current and maximum depth, dive time (minutes and seconds), ascent speed, time. Functions up to 199.9 m
• Logbook of the last 30 hours of dives or the last 60 dives, with 3 data displays for each dive.
• Memory of the total number of dives, of the hours spent under water and of the maximum depth reached
• Profile of every dive (without interface)
• Transfer of data to PC (with optional interface, not available for Windows Vista).
• Complete scrolling of NDL times to 48 m
• Simulator for dives with air or with enriched mixes, for single or repetitive dives, complete with alarms and every other function that can be set using independent buttons, both during descent and ascent.
• Possibility of performing general reset so that the computer can be used in a diving centre.
• Possibility of changing from metric units to imperial units and vice versa
• Diameter: 62.3 mm
• Thickness: 24.7 mm