Aqua Lung Apeks Regulator User Manual

Page 13

External Second Stage Adjustments

External adjustment features offer many advantages, including

the ability to adjust your second stage regulator’s sensitivity as

your diving conditions change. This allows you to maintain peak

performance throughout every dive, or to desensitise your regulator’s

opening effort at times when you are not breathing from it.

Integrated Venturi Switch

Apeks second stages are equipped with a diver controllable venturi

system. This system is known as the integrated venturi system (IVS)

switch or Reversible Venturi System (RVS) on the XTX range of

second stage regulators. This switch allows the diver to control the

venturi assist to reduce sensitivity to free flow at the surface and

provide the maximum airflow at depth.

Whilst diving, set the switch to plus (+) to achieve maximum venturi

assistance for easier breathing.

To prevent the second stage from free-flowing, however, you should

set the IVS/RVS to the MIN(–) setting during entry or while swimming

on the surface.

Regulator Owner’s Manual

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Note: Egress Second
Stages (not
shown) do
not include
an inter-
grated venturi
Switch.

CAUTION: Do not use
mouthpiece

insertion type

Octopus holders. The
internal venturi deflector may
become dislodged.