euclid The Time Traveler's Clock, Руководство пользователя

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chronometer was fully wound. After the hand goes past “48 hours”, the
chronometer will stop and will need to be restarted and re-set.
4. Any time the chronometer stops because of not being wound, follow the
“Starting Instructions” carefully and do not shock the chronometer. Otherwise,
damage may be done to the sensitive escapement mechanism in the
chronometer.
• Time-keeping Verification
o If the GPS display, RTC display, and chronometer dial agree, then it is assured that the
TTC is indicating accurate time.
o If the chronometer stops, but there is still GPS time displayed (and it agrees within a few
seconds to the Real Time Clock), the chronometer may be restarted according to the
“Starting Instructions.”
o If Power is lost for less than 12 hours, the TTC should restart by itself and indicate
accurate time.
o If power is lost for over 24 hours but less than 48 hours, and the backup batteries are
depleted, the TTC may be re-initialized using the instructions above, as though it were
new from the factory, although the chronometer should still be operating and will not
need to be reset.
o If power is lost for over 24 hours, the chronometer should be manually wound to keep it
running and indicating mechanically-accurate time.
o If power is lost for an extended period of time, and GPS is not available once the power
is returned, the only displays which will indicate accurate time will be the Real Time
Clock display (within a few seconds of accurate time) and the mechanical chronometer.
Figure 19: Hamilton 21 Chronometer Starting Instructions
• Servo Controls
o ServoSync
The system which keeps the Hamilton chronometer synchronized with the GPS and Atomic
time reference is called ServoSync. Synchronization is achieved by a small rotary impulse
motion delivered to the chronometer by a servo motor, triggered by the 1pps signal from
the GPS circuit. The motion is small, on the order of one-half millimeter, but can be felt by
resting a finger on the ring surrounding the chronometer. The ServoSync function is
controlled by the “ServoSync” button on the top panel. One push turns the function on, and
another push turns it off. When active, the button is lit green.