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The BUDDY NEXUS Dive Computer

The BUDDY NEXUS is the first affordable, multi-mode dive computer designed for the full span of your diving career...

	Open Circuit sport diving (conventional SCUBA with Air)

	Open Circuit Technial Diving (constant FO2 nitrox - up to 2 mixes)

	Closed Circuit diving with a constant PO2 Rebreather - such as the Ambient Pressure Diving Inspiration or Evolution CCRs.

The Nexus is the product of many years diving experience and as a result the design team have made a number of key ergonomic improvements. The Nexus is simple to operate and easy to read. The Nexus includes essentials such as:

	An LCD layout which clearly communicates key information

	Simple water-contact activation switches

	Clear audible and visual warnings

	Our unique 14" corrugated wrist strap - long enough to fit the bulkiest of dry-suit sleeves

The Nexus allows you to choose between Open Circuit and Closed Circuit modes - without waiting for the computer to desaturate!

Open Circuit

Constant FO2 (fraction of oxygen) mode:

	Air diving (FO2 = 21%)

	Nitrox diving (FO2 = 21-50%)(including Semi-Closed Circuit systems)

	2 Mix Nitrox diving (1st mix FO2(1) = 21-50% and 2nd mix FO2(2) = FO2(1)-100%)

Closed Circuit

Constant PO2 (partial pressure of oxygen) mode: Designed for use with the BUDDY Inspiration - the Nexus can be used with Closed Circuit Rebreathers that maintain a constant partial pressure of oxygen (constant PO2) with AIR in the diluent cylinder and OXYGEN in the O2-addition cylinder. The Nexus provides information to the diver by monitoring the dive parameters and calculating no-stop times, decompression obligations and other important factors. The Nexus supplies the following information:

	Dive Time

	Depth

	Max Depth

	Dive Number

	No Stop Time (time remaining before a decompression stop is required)

	Total Ascent Time (if decompression is required)

	Ascent Speed Indicator (bar graph)

	Surface Time

	Desaturation Time

	CNS% (Central Nervous System oxygen toxicity clock)

	Current PO2 (in Open Circuit mode)

	Current PO2 Setpoint (in Closed Circuit mode)

	CC (Closed Circuit) Mode Indication

	Water Temperature (Fahrenheit or Celsius)

Warnings

The Nexus gives the following warnings:

	PO2 Limit Violation - in Open Circuit mode

	CNS% Violation

	Decompression Dive has commenced (and every subsequent 30 seconds)

	Ascent Rate Violation Warning

	Start Ascent (No-Stop Time has expired)

	Stop-Depth or Depth-Ceiling (diver must not ascend above this depth)

	Move to Stop-Depth (stop-depth has been violated)

	Battery Low

Additional Features

	Two different programmes - NORMAL(0) and SHORT(1) can be selected based on the physical condition of the diver, water conditions and recent dive history

	LCD illumination

	Underwater operable switch for illumination and audible alarm option

	Dive profile memory

	Dive planning mode (dive simulator)

	Scroll mode (allows you to scroll through the No-Stop times)

	PC download capability

	Battery can be replaced by the user without memory loss of dive profile

	Water salinity correction factor for calibration

	Imperial or Metric scale

	Altitude Group

	Modified Buhlmann algorithm with Equivalent Air Depth calculation for Nitrox (Enriched Air Nitrox calculations by Prof. Bill Hamilton, Hamilton Research Inc.)

	CNS clock during diving displayed in percentage digits

Technical Specification

Electronics: Printed circuit board

Microprocessor: 8 bit CMOS processor

Production method: SMD COB

Depth Gauge Resolution: 0.3m (1 foot)

Depth range: 64.8m (213 feet)

Temperature range: -14 to 50oC (40 to 122oF)

Altitude range: 0 - 3,500m (0 - 11,480 feet)

Ascent rate: 64.8m to 20m (213 feet to 66 feet): 20 metres (66 ft) per minute. 20m (66 feet) to surface: 10 metres (33 ft) per minute

Power source: 1 lithium battery SAFT LS3 or LS14250

Size: 1/2 AA

Volts: 3.5

Life: Approx. 300 hours of diving without use of light.

Housing Material: Polycarbonate

Other Materials: Glassfibre armoured PA12
Dive programmes (Cnd - conditions): Normal(0) & Short(1)

EAN/nitrox: modified Buhlmann EAD calculation, EAN calculations by Prof. Bill Hamilton, Hamilton Research Inc.

EAN/nitrox (open circuit) safety precautions:
Adjustable FO2 and PO2
Current PO2 displayed during diving
CNS clock

Memory capacity: 10 dives or 10 hours

Warranty: 1 year from purchase of unit.