Chronofiable®
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Elaborated at the end of the 70ies by the « Centre de contrôle de la la fiabilté » of the Swiss Federation of the Horological Industry, the accelerated ageing test Chronofiable® simulates the normal wearing conditions with an intensity factor of about 8.
This unique procedure, applicable for both mechanical and quartz movements, allows to evalute the reliability rate of a watch product. Currently Chronofiable® is often part of the design validation process
for a new product.Typical lot size ranges from 5 to 40 cased movements, with dial and hands.
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The Chronofiable® ageing test comprises the following steps :
(mechanical and quartz movements) |
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Initial check of the movement functions, the rate and the amplitude test, at two temperature levels (0°C and 50°C), check of the power reserve and the winding velocity (automatic movements) |
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Ageing cycles consisting of linear and angular accelerations, shocks as well as changes in temperature and humidity during the cycles |
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Intensity factor |
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8 |
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Duration |
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21 days (corresponding to about 6 months of effective wear) |
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Shocks |
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20'000 shocks ranging from 250 to 5500
m/s2 |
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Angular accelerations
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about 8 rad/s2 |
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Thermal conditions
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17°C, 30°C and 57°C |
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Final check of the movement functions, the rate and the amplitude test, at two temperature levels (0°C and 50°C), check of the power reserve and the winding velocity (automatic movements) |
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Note : 9.81 m/s2 = 1g |
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Calibrated shock at 5500 m/s2
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Testing device |
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