General Description; General Use - Bell & Ross BR-X1 CHRONOGRAPH Notice Technique

BR-X1 CHRONOGRAPH
BR-CAL.313

GENERAL DESCRIPTION

Movement : automatic mechanical. BR-CAL.313. Skeleton chronograph. 56 jewels. 28,800 vibrations per hour. Power
reserve of approximately 40 hours. High precision setting with 4 positions (tolerance of 0/+10 seconds per day).
: hours, minutes and small seconds. Chronograph with 60 s and 30 min totalizers. Date with rapid correc-
Functions
tion. Case : screw-down crown. Rocker push-buttons.

GENERAL USE

To unscrew the crown in position 0, turn it anticlockwise.
to position 1 then wind the mechanism by turning the crown clockwise. After approximately 40 rotations, the watch
is completely wound (the mechanism does not have a stopper to avoid too much pressure on the winder). The power
reserve is then approximately 40 hours. When the watch is worn , it is the automatism which winds the movement.
Date setting : Quick setting * (crown in position 2): pull the crown to position 2 and adjust the date by turning the
crown anticlockwise. Slow setting (crown in position 3): in order to ensure a date change at midnight and not at mid-
day, it is advisable to carry out the date setting with the help of the hour hands. Pull the crown to position 3 and turn
the hands until the date has changed. Then adjust the hour accurately.
position 3. The second hand has thus stopped which enables an adjustment with accuracy to within one second. Adjust
the hour by turning the crown in the desired direction.
USE OF THE CHRONOGRAPH
The Chronograph function allows time to be measured in minutes and seconds
Measuring a period of time
st
1 press on Tappet P1: starts measuring time
nd
2 press on Tappet P1: stops measuring time
rd
3 press on Tappet P2: resets and stops the stopwatch
Measuring a period of time with interruption
st
1 press on Tappet P1: starts measuring time
nd
2 press on Tappet P1: stops measuring time
rd
3 press on Tappet P1: restarts measuring time
This makes it possible to subtract one or more time periods from the total time measured
Water resistance : 100 metres.
. When the watch has stopped , unscrew the crown
In service
Hour setting
4
. Unscrew and pull the crown to