Breitling Namitimer Cosmonaute Manual Del Usuario página 9

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 dan-
gereux 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 the COSC (Swiss Official Chronometer
Testing Institute), a neutral and independent body which individually tests
each movement according to the prescriptions in force.
The 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 move-
ment's performances must meet 7 very strict criteria, including a daily vari-
ation 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 fitted with an additional mechanism
enabling the measurement of the duration of an event. A chronograph is
not necessarily chronometer-certified, but all Breitling chronographs carry
the much-coveted title of "chronometers".
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