Breitling NAVITIMER 1884 Manual Del Usuario página 10

À ÉVITER
Comme tout objet de valeur, les chronomètres Breitling méritent un soin
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. En outre, votre chronomètre Breitling est
conçu pour fonctionner idéalement dans une plage de température comprise
entre 0°C et 50°C.
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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 COSC (Swiss Offi cial Chronometer
Testing Institute), a neutral and independent body which individually tests
each movement according to the prescriptions in force.
The certifi cation test for wristwatches with sprung balance oscillators,
according to standard ISO 3159, consists of observing each movement for
15 days and 15 nights, in 5 positions and at 3 different temperatures (8°C,
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.
The term "chronometer" should not be confused with that of "chrono-
graph", which is a complicated watch fi tted with an additional mechanism for
measurement of the duration of an event. A chronograph is not necessarily
chronometer-certifi ed, but all Breitling chronographs bear the much-coveted
title of "chronometer".
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