BAR822/Manual Helium Escape Valve
BAR833/Manual Helium Escape Valve
SCREW CHRONO BUTTON
CHRONOGRAPH/ START and ST OP
SCREW CHRO NO BUTTO N
CALENDAR ADJUSTMENT
SCREW CHRONO BU TTON
CHRONOGRAPH/S TART and STOP
SCREW CHRONO BUTTON
CALENDAR AD JUSTMENT
SCREW CROWN/OP EN
HOUR ADJUS TMENT
HOUR ADJUS TMENT
SCREW CROWN/O PEN
CHRONOGRAPH/START POINT
CHRONOGRAPH/S TART POINT
HELIUM ESCAPE VALVE
SCREW CHRO NO BUTTON
HELIUM ESCAPE VALVE
ALWAYS MUST BE CLOSED POSITION
SCREW CHRONO BU TTON
ALWAY S MUST BE CLOSED P OSITION
How to use the helium escape valve? (fig.2)
In its normal position (fig.2.1), the helium escape
valve is perfectly watertight thanks to the gaskets
During the decompression phase, unscrew the crown of the
valve in order to release the mechanism (fig.2.2). The valve is now
watertight from the outside. As the interior pressure becomes
greater than the exterior pressure, it pushes the gasket (A) out of
its seating, thus releasing the gas (fig.2.3). Once the pressure is
equali
sed, gasket (A) returns to its original position, pushed by the
SCREW CHRONO BU TTON
SCREW CROWN/C LOSE
HELIUM ESCAPE VALVE
(B), but it is not functional, since it is screwed down. spring (C) (fig.2.2).This operation is automatically repeated several
times during the decompression phase. Once atmospheric
pressure is reached, screw down the crown of the valve (fig. 2.1).
Note: Even if the valve is unscrewed, we strongly recommend that
the valve remains screwed down whenever the watch is immersed
in water, the watch is still water-resistant to a relative pressure of
in water, the watch is still water-resistant to a relative pressure of
5 Bar (50 metres). However, complete water-resistance to the dial
depth can only be achieved with gasket (B) and the valve in the
screwed down position.
Automatic helium escape valve: if your watch is equipped with an
automatic helium escape valve, no manipulation is required.
NOTE: Automatic helium escape
valve: if your watch is equipped
with an automatic helium escape
valve, no manipulation is required.
CALENDAR AD JUSTMENT
HOUR ADJUSTMENT
SCREW CROWN/O PEN
SCREW CHRONO BU TTON