Cold Water Use - Beuchat VS3 Notice D'utilisation

Notice Detendeurs 07-2008 int.qxd
54 > User guide / VR 200 Evolution - VRT 200 - VR 200 Iceberg - VR 200 NITROX
NITROX second stage comes from factory with adjust-
ment knob (except VRT) and lever in the minus position.
C > Venturi lever
This lever, located on the side of the second stage
Housing, enables the diver to control the inhalation
Venturi effect. When on the + position, the diver get
maximum Venturi assistance upon initial inhalation, the
air flow is maintained without additional effort.
Important : On the surface to avoid any free flow resul-
ting from surface waves and / or sudden entry in the
water , the diver should keep the lever pushed towards
the front in the - minus position. This position should be
maintained whenever the second stage is used as an
octopus for a safe second stage.
At the beginning of the dive, the diver should push the
Venturi lever in the + / plus position, to obtain optimum
breathing characteristics. The + / plus position is the "dive
mode" position.
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D > INHALATION RESISTANCE (Except VRT)
This knob, located on the left hand side of the VR / VRT /
VR Iceberg / VR NITROX hosing, allows to adjust the resis-
tance on the VR / VRT / VR Iceberg / VR NITROX spring and
thereby to alter the initial breathing resistance. The diver
can choose any position between the minimum (turned
completely counter clock wise) and the maximum (turned
completely clock wise) depending on the conditions. tur-
ning the knob clockwise will increase the inhalation resis-
tance, turning it counter clockwise will decrease the inha-
lation resistance. When the inhalation resistance knob is in
the minimum position, there may be a light free flow. If
this is the case, slightly turn the knob clockwise until the
air flow stops. Or have your regulator checked by an
authorized BEUCHAT dealer.

2 - COLD WATER USE

Use of regulators in water temperature colder than 50 F /
10°C, requires special equipment and precautions.
Only the VRT80, VX10 Iceberg, VX200 Iceberg, VR200
Evolution et VR200 Iceberg should be used in cold water
diving.