Method for adjusting the chronometry of a timepiece movement intended to operate in a low-pressure atmosphere

摘要

A method for regulating time-keeping of a mechanical timepiece movement intended to operate in a low-pressure atmosphere, includes the successive steps of: placing the movement in a low-pressure atmosphere pre-established for normal operation of the movement; measuring the gain or recoil (typically a gain +ΔP) of the time-keeping precision of the movement at this low pressure; returning the movement to ambient atmospheric pressure; at the ambient atmospheric pressure, regulating the movement to compensate for the previously measured gain or recoil; and returning the movement to the low-pressure atmosphere pre-established for normal operation of the movement.

主权项

1. A method for regulating time-keeping of a mechanical timepiece movement intended to operate in a low-pressure atmosphere, comprising the successive steps of:
1. placing the movement in the low-pressure atmosphere pre-established for normal operation of the movement, 2. measuring a gain or recoil (ΔP) of time-keeping precision of the movement during low-pressure operation in the low-pressure atmosphere, 3. returning the movement to ambient atmospheric pressure, 4. with the movement at the ambient atmospheric pressure, regulating the movement to compensate for the previously measured gain or recoil in during the low-pressure operation by performing a gain or a recoil (−ΔP), and 5. returning the movement to low-pressure atmosphere pre-established for normal operation of the movement, wherein the regulating of the movement takes place only in the ambient atmospheric pressure, and no regulating of the movement takes place during the low-pressure operation in the low-pressure atmosphere.