Dive Rite O2ptima Owner's Manual download pdf (Page 6)

O ptima FX Owner’s Manual

Ch. 1 Pg. 1

Chapter 1

Common Terms and Diving Systems

Objective

The purpose of this chapter is to briefly outline the various diving systems in use, to

discuss the advantages and disadvantages of each, and to define common diving terms and

acronyms.

Glossary

The following is a list of terms that are frequently used by divers and may be used

throughout this manual.

Automatic Diluent Addition

Valve This valve is normally used to automatically maintain

loop volume by adding diluent to the breathing loop. The

addition is accomplished through either a demand valve

or plunger arrangement that activated on decreased

volume. Increasing pressure during descent reduces the

loop volume by compression.

Breathing Bag A flexible container that is used to receive and supply gas

during respiration while using a rebreather system. Also

referred to as a “counter-lung”.

Closed-Circuit Rebreather

CCR A type of rebreather where the breathing loop is isolated

from the environment. During normal operation at a

constant depth, no gas is vented and only oxygen is

added.

Counter-Lung A flexible container that is used to receive and supply gas

during respiration while using a rebreather system. Also

referred to as a “Breathing Bag”.

Diluent Addition Valve This valve is normally used to manually add diluent to a

CCR in order to increase volume due to compression on

decent or to flush the loop with a known gas.

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Dive Rite O2ptima Owner's Manual Page 6