GB
13
Regulator Owner’s Manual
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Inhalation Resistance Control Knob
Some second stage models are equipped with an additional adjustment,
which controls inhalation resistance.
This control knob, located beside the IVS/RVS switch, adjusts the
amount of effort required to start the air flow at the beginning of the
inhalation cycle. As it is turned “in” (clockwise), the opening effort will
increase. This will make the second stage less sensitive to sudden
changes in ambient pressure. Turning the knob “out” (anti-clockwise) will
decrease the opening effort to make breathing easier.
This adjustment is particularly useful at deeper depths, or in variable
conditions that affect the opening effort of the second stage, such as
strong currents or while using a diver propulsion vehicle (DPV). You can
use the inhalation control knob to tune your regulator to maintain its peak
performance throughout the course of your dive, or you can leave it set
in its mid-range position and dive with it as you would any non-adjustable
second stage.
+
Resistance
Anticlockwise
Clockwise
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