# Watch timing machine

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A **watch timing machine** or **timegrapher** is a machine that acoustically measures the ticks of a mechanical [watch](/source/Watch) to assess its accuracy and enable calibration. This device calculates the [amplitude](/source/Amplitude), beat rate, and beat error of a mechanical watch, and provides a summary of these figures after the watch is connected to the device for a fixed interval of time.[1] The information recorded by this instrument is used by [horologists](/source/Horologists) and [watchmakers](/source/Watchmaker) to help determine if the timepiece's [movement](/source/Movement_(clockwork)) is in need of servicing, or a complete overhaul, to restore its [timekeeping](/source/Timekeeper) accuracy.[2] It is also used to determine if a newly produced timepiece is accurate, prior to being sold or released.

## References

1. [https://millenarywatches.com/best-timegraphers-for-your-watch/](https://millenarywatches.com/best-timegraphers-for-your-watch/) Millenary Watches: How does a timegrapher work?

1. [https://www.bobswatches.com/watch-resources/how-to-use-a-timegrapher](https://www.bobswatches.com/watch-resources/how-to-use-a-timegrapher) Why You Should Own A Timegrapher (and how to use it) *Bob's Watches*, JANUARY 07, 2015

## External links

- [A Youtube video of a timing machine](https://www.youtube.com/watch?v=n0suo6f2zIY)

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Adapted from the Wikipedia article [Watch timing machine](https://en.wikipedia.org/wiki/Watch_timing_machine) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Watch_timing_machine?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.