A chronometer shows the correct time at all times. Imagine the following situation:
- A watch gains 8 seconds during the day but byleaving it dial-up overnight it is spot-on perfect in the morning richard mille rm 011 replica ebel classic wave replica watch so over 24 hours its perfect ( well within COSC limits)
- But over the 16 hours it was being worn itgained 8 seconds=+12s/d
- Over the 8 hours it was dial-up it lost 8seconds=-24s/d
- For most of the day its not showing the righttime.
Precision clocks in observatories didn't hack they wereleft as undisturbed as humanly possible and the observatory maintained a log ofaccuracy using the timing of stars through a transit telescope as a reference. Marine chronometers often didn't hack forthe same reasons and a log was kept of their accuracy.
You have to be able to read the time with the appropriatedegree of precision for the usage. Chronometersgenerally beat seconds. Inanobservatory astronomers wanted an audible indication of seconds while theylooked through the telescope for the exact moment of transit and a one second tick was perfect for this. When clocks started being kept in clock vaults an audible tick via electrical systems had to be created in the observing roomsThe dials of chronometers were designed to optimizethe most important elements (seconds in an observatory clock).
A chronometer has predictable errors or rate. A chronometer was considered as a tool that wouldbe left totally undisturbed and untouched until its accuracy became unpredictable(predictable errors can be taken into account).Once errors became unpredictable it was cleaned replica rolex watch repaired modified etcas appropriate.
The accuracy of a chronometer was judged in the long term (over a period of many months).
There was no mechanical-is-best snobbery - a chronometer was a tool and the arrival of reliable electro-mechanical clocks was welcomed with open arms as it meant the clock could be kept deep underground in a clock vault with stable temperature and humidity and far removed from everyday shocks and vibrations which added significantly to their long term precision and the time oculd be displayed on electro-mechanical clocks via electrical signals.
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