INSTRUMENTS

The latest version of the Archimede computer, aesthetically redesigned and complete with new and sophisticated software that during the dive can manage two different Nitrox mixes, which can be selected at any time of the actual dive. The already excellent features of Archimede have been considerably improved both for scuba divers and for free divers who have the new GAUGE function as an indispensable instrument that can monitor all their dives in detail.

New Cressi computer that makes the most of all the experience it built up with the Archimede model to offer a futuristic instrument that has extremely cutting edge features, which make it the perfect instrument for divers who want to keep up with the developments of the most advanced underwater diving. The aesthetics of the computer have also been revamped and it now has a new upper shell, with coloured inserts that modernise it and give it a more modern look. The strap is also new, with stretch inserts to absorb squeezing of the suit when diving deep. But it is the software of this computer that has undergone the biggest changes. First of all, the saturation compartments have been increased from 9 to 12, for even more precise monitoring of the compartment saturation and de-saturation mechanisms. And the possibility of using a second Nitrox mix during the same dive has also been introduced. This assists and faithfully monitors even those divers who choose to entrust the de-saturation of their organism to even higher oxygen-rich mixes, a practice that gives added safety to the dive and that more and more enthusiasts are following. 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 but the use of the two different mixes can be selected at any time during the dive. Obviously the partial pressure of both 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, now also visible during decompression, the choice of three different Safety Factor levels - the ascent speed indicator (expanded), the temperature sensor (more rapid) and the display back lighting (lighter). Lastly, the brand new GAUGE function that can be used both for scuba diving and free diving, which selects only some of the functions of the instrument, like instant and maximum depth, duration of the dive (in minutes and seconds), time and ascent speed. The operative range in GAUGE function arrives at up to 200 metres. 

Technical features 

-Bühlmann ZH-L8 algorithm, redesigned by Randy Bohrer to make it suitable for a more sophisticated RGBM program. The result is an algorithm that is very similar to the ZH-L16, but less penalizing regarding water temperature and repeated overshooting of the ascent speed. 
-Compartments: 12 with saturation half times of between 5 and 640 minutes -Diameter: 62.3 mm 
-Thickness: 24.7 mm -Salt water calibrated -Display range: 0 - 99.9 m (0-199.9 in Gauge function) 
-Accuracy: +/- 3% +0.5 m -Resolution: 0.1 m 
-Maximum surface time: 48 h -Altitude monitoring: every 10 min -Altitude range: from 0 to 6000 m 
-Thermometer with resolution of 0.1 °C 
-Accuracy: +/- 2°C -Display range: -5°C/ + 40°C -3V CR 2032 battery at Li/MnO2, easy to find and low cost -Battery life: about 2 years with 50 dives per year 
-Battery replacement by user, without needing equipment -Back light display for 5 seconds (pushing a button) 
-Replaceable display protection screen 
-Can be used with air or Nitrox (choice of 2 different mixes in the same dive) 
-Adjustment of oxygen fraction from 21% to 50% with 1% increase for the first mix and from 21% to 99% for the second mix 
-Partial pressure adjustment of oxygen from 1.0 to 1.6 bar, with 0.1 bar increases for both mixes 
-Possibility of setting a personal safety factor that can be selected on 3 positions (0, 1, 2) 
-Possibility of setting an alarm for a certain depth 
-Bar graph for Nitrogen saturation 
-Bar graph for CNS oxygen toxicity 
-Ascent speed indicator at 4 levels + SLOW + audio alarm when maximum speed is exceeded. There are 3 maximum ascent speeds that decrease progressively as the diver approaches the surface: 16 m/min up to 18 m, 12 m/min from 18 to 6 m, 8 m/min from 6 m to the surface. 
-Audio and visual alarms for: 1.nearing NDT (no decompression time) 2.need for decompression stops 3.too high PO2 level 4.nearing limits of CNS O2 toxicity 5.too fast ascending speed 6.exceeding computer limits 7.not respecting decompression depth 8.exceeding depth set by user 
-Decompression stages provided for down to 30 m 
-3' safety stop at the end of every dive over 10 m deep (not compulsory) 
-Date and time incorporated 
-Gauge function (only present and maximum depth, dive time (minutes and seconds), ascent speed, time. Functioning to 199.9 m 
-Logbook of the last 30 hrs of a diving or the last 60 dives, with 3 data displays for each dive 
-Past memory of total number of dives, hours spent underwater and maximum depth reached 
-Profile of every dive (without interface) -Data transfer to PC (with optional interface) 
-Complete scrolling of NDL times down to 48 m 
-Simulator for air or Nitrox dives, for single or repetitive dives, complete with alarms and every other function, settable using independent buttons, both for descent and ascent 
-Possibility of general reset so computer can be used by a diving center 
-Possibility of changing from metric to imperial measuring units and vice versa

The first Cressi-sub computer integrated into a wristwatch. Weight and size are very compact making the instrument suitable for everyday use, and not only specifically for diving. Despite its compact size, Edy combines complete programmes for three different dive types in a single instrument: - scuba diving (air or nitrox) - technical diving (bottom gauge and timer down to 200 metres) - free diving It is also a digital wristwatch, great looking, complete with dual time zone and alarm, and can be backlit to read data when there is poor illumination.

Despite its compact size, Edy combines complete programmes for three different dive types in a single instrument: - scuba diving (air or nitrox) - technical diving (bottom gauge and timer down to 200 metres) - free diving For all practical purposes, these are three different, very sophisticated and complete instruments, which can be used by an incredibly wide variety of users. Most of the software is derived from the recent Cressi Archimede 2 computer software and is a sophisticated Bühlmann ZH-L12 modified and developed by Randy Bohrer, with some 12 sample tissue compartments of and with saturation half-times of between 5 and 640 minutes. Let's have a closer look at the three different instruments. In the SCUBA DIVING UNDERWATER COMPUTER mode it is possible to choose to use air or enriched air mixes with up to 50% oxygen, where the diver can select partial pressure of this gas from between 1.0 and 1.6 bars. It has some three Safety Factors, a maximum depth alarm that can be inserted as you like, graphic display of nitrogen saturation and CNS oxygen toxicity, bar graph showing ascent speed, thermometer and a wide range of audio and visual alarms. A particularly high performance logbook memorises a great deal of data of the last 30 hours' dive time or the last 60 dives, which can be reviewed one by one at intervals of 30 seconds, thanks to the incorporated Profile mode that does not need accessory interface. A handy History mode memorises maximum depth, hours spent underwater and total number of dives made. In the GAUGE mode, Edy is a valuable instrument if you want to programme the dive with decompression software and make the dive with tables, as required by technical dives. The functions indicated provide immediate and maximum depth, dive time (including seconds!), indication of ascent speed, thermometer, the classic watch and a really handy chronometer (hours, minutes and seconds) so you can precisely calculate ascent and decompression stops. It is also possible to activate a depth alarm. The GAUGE mode also comes with its own logbook that even calculates the average dive depth and records the temperature at the maximum depth reached, as well as a Profile mode to review the dive at intervals of 30 seconds and an independent History mode to record only the dives made in GAUGE mode. In the freediving (FREE) mode, all the needs of free divers were taken into consideration. So indications of present and maximum depth, dive time (minutes and seconds), ascent speed are all provided, and it is possible to insert a depth and/or time alarm. On the surface, the interval between one dive and the next is indicated (in minutes and seconds), and there is even a thermometer. This mode also has its own Logbook that can memorise up to 60 dives, full of data, all of which can be reviewed with the incorporated Profile mode at intervals of just one second (world exclusive!). The History section memorises the total number of dives in a day, indicating the deepest dive and how long it lasted. This daily memory can be reset at any time. To complete these three super dive instruments there is a handy digital watch, complete with dual time zone and alarm, and the display can be instantly lit (above and underwater) with a simple push of a button. And any watchmaker can replace the battery in a flash. An interface is available as accessory to download all the recorded data and transfer it onto a PC, so it is possible to access many other functions. 

Technical features
 - Bühlmann ZH-L8 algorithm, redesigned by Randy Bohrer to make it suitable for a more sophisticated RGBM program. The result is a very similar algorithm to the ZH-L16, but less penalizing regarding water temperature and repeated overshooting of the ascent speed. 
- Tissue compartments: 12 with saturation half times of between 5 and 640 minutes - Complete processor of data, also including possible decompression, for dives using air or oxygen-rich mixes (Nitrox) 
- Complete setting of FO2 and PO2 parameters; it is possible to set PO2 between 1.0 and 1.6 bars and FO2 between 21% and 50% - Possibility of making a Nitrox dive after an air dive (even with de-saturation underway) 
- Maximum depth alarm (can be activated by user) 
- Display with UFDS (User Friendly Display System) for perfect comprehension and easy legibility of data 
- Dive plan (Scrolling) manual 
- User can change measuring units from metric system (metres and °C) to imperial system (ft and °F) 
- Audio and visual alarms 
- Nitrogen saturation bar graph 
- CNS oxygen toxicity bar graph 
- Ascent speed bar graph - Backlit display 
- Differentiated ascent speed according to depth 
- Instant PO2 indicator 
- Safety Stop (not compulsory) indication at end of dive (between 9.9 and 3 m) 
- Thermometer 
- Possibility of setting GAUGE programme (bottom gauge/timer) 
- Possibility of setting FREE programme (free-diving) 
- Complete logbook (30 h or last 60 dives) of dive profile (3 independent logbooks for each of the COMPUTER, GAUGE and FREE functions) 
- Dive profile can be reviewed without interface (30 second intervals in the COMPUTER and GAUGE functions, 1 second intervals in the FREE function) 
- Dive history memorised (maximum depth, N° dives and hours spent underwater). Three different and independent histories for the COMPUTER, GAUGE and FREE functions 
- Automatic depth setting from 0 to 6000 metres 
- Graphic notification of flat battery 
- Maximum depth in COMPUTER function 99.9 m 
- Maximum depth in GAUGE and FREE functions 199.9 m 
- Calendar and watch with alarm and second time zone functions 
- PC interface (optional) Size and weight: Diameter: 51 mm 
- Height: 12mm 
- Weight: 75 g 
Pressure sensor: 
- Calibrated for salt water (the depths indicated are about 3% lower in freshwater) 
- Temperature compensated 
- Measurement field in the DIVE function: 0-99.9 m 
- Measurement field in the GAUGE and FREE functions: 0-199.9 m 
- Precision: +/- 1% (T 20°C) 
- Reading resolution: 0.1m (from 0m to 99.9m), 1m (from 100m to 199.9m) 
- Surface interval: from 0 to 48 hours 
- Monitoring of depth modes: from 0 to 6000 m, measured every 10 minutes 
- Dive time: from 0 to 599 min 
- Interval data acquisition: 30 sec (DIVE/GAUGE programmes); 1 second (FREE programme) 
THERMOMETER: 
- Resolution: 1 °C 
- Measurement field: 
-5 °C + 40 °C 
- Precision: +/- 2 °C; adaptation to °T change every 1 min 
WATCH: 
- Precision: average +/- 10 sec a month
- Display 12/24 hours 
BATTERY: 
- Flat tab 3V Li/MnO2 CR 2032 battery. Lasts for an average of 2 years (50 dives a year)