Breitling NAVITIMER WORLD Manual De Instrucciones página 9

À ÉVITER
Comme tout objet de valeur, les chronomètres B
particulier. Ainsi, il convient de les protéger des chocs et coups à des objets
durs, de ne pas les exposer à des produits chimiques, solvants ou gaz dange-
reux ni aux champs magnétiques. e n outre, votre chronomètre B
conçu pour fonctionner idéalement dans une plage de température comprise
entre 0°C et 50°C.
méritent un soin
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YOUR BREITLING CHRONOMETER
A chronometer is a high-precision instrument that has successfully passed the
entire battery of tests imposed by the COSC (Swiss Official Chronometer
t esting Institute), a neutral and independent body which individually tests
est
each movement according to the prescriptions in force.
t he certification test for wristwatches with sprung balance oscillators,
according to the ISO 3159 norm, consists of observing each movement for
15 days and 15 nights, in 5 positions and at 3 different temperatures (8°, 23°C,
38°C). In order to earn the prestigious chronometer label, a movement's
performances must meet 7 very strict criteria, including a daily variation in
rate ranging between only –4/+6 seconds.
t he term "chronometer" should not be confused with that of "chronograph",
which is a complicated watch fitted with an additional mechanism enabling
the measurement of the duration of an event. A chronograph is not neces-
sarily chronometer-certified, but all B
coveted title of "chronometers".
chronographs carry the much-
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