POSEIDON SE7EN+ - Preface

Poseidon SE7EN+ User Manual Chapter 1 Page v
Preface
Congratulations on your decision to purchase the Poseidon SE7EN+ Closed-Circuit
Rebreather (CCR). The Poseidon SE7EN+ design includes several fundamental improve-
ments over previous closed-circuit rebreather designs. Among the breakthroughs are:
• Extreme compactness – at only 18 kg / 40 lbs ”ready to dive” and 9 kg / 20 lbs
“travel weight” the SE7EN+ is one of the world’s smallest rebreathers. Take it as
carry-on baggage when ying. Enjoy the freedom. Yet it is not “lightweight” in terms
of performance – you get three depth-independent hours of near-silent diving.
• The rst truly auto-calibrating and auto-validating rebreather. The SE7EN+ uses a
patented automated method to verify that the oxygen sensors are working
properly at all times – both before and during a dive.
• An smart battery – it’s your personal power. Remove the modular battery, put it in
your shirt pocket, and take it home to recharge it. When you are ready to dive,
take the battery from the charger and plug it into the rebreather.
• The world’s most advanced rebreather interface – The SE7EN+ contains ve
separate warning and advisory systems so that you get the information you need
to manage your dive without the task-loading normally associated with rebreath-
ers. The main Poseidon SE7EN+ data interface is a large format at screen panel
or M28 with a 2.8 inch colour display all you need to know about consumables
management – cylinder pressures, dive time, depth, oxygen level, and it incorpo-
rates a sophisticated resource algorithm that monitors all systems for you and
tells you when its time to head up. If things are not going correctly for whatever
reason, the SE7EN+ has audible, tactile, and visual warning systems to get your
attention, and to advise your diving partner of your status.
• Bail Out Valve – in a signicant new patented design, the Poseidon SE7EN+ gives
you the ability to switch from closed-circuit to open-circuit operation in one easy
motion, without the need to search for a spare mouthpiece in an emergency. The
ultra-compact Bail Out Valve is lightweight and easy to breathe, giving you high
performance in both open-circuit and closed-circuit modes. The SE7EN+ mouth-
piece also combines in the same housing a pressure balanced “Automatic Diluent
Addition Valve” (ADV) that compensates for breathing volume in closed-circuit
mode, so that you will never run short of a full breath during a dive.
• Easy maintenance – the entire rebreather breaks down rapidly for washing, drying,
and storage. No tools needed.
• New software releases can be downloaded and installed over the internet, and
various system parameters can be customized to meet your particular dive ope-
rating paradigm.