Online timegrapher
Put the watch on a timegrapher microphone plugged into your computer or phone. The page measures the rate, the beat error and the amplitude, like the instrument in my workshop. Nothing is sent anywhere: it is all worked out in your browser.
timegrapher · l'atelier TL
The six positions
Pick the position the watch is held in, wait until the numbers settle (about thirty seconds), then print to note it. Do at least two: dial up and crown down.
You need a microphone that touches the watch: a clamp with a piezo sensor, plugged in by USB or into the headphone socket. A computer's own microphone mostly hears the room. The browser asks your permission to use the microphone; pick it in the list if the computer has several.
It is the angle the balance turns through while the pallet fork gives it its impulse. Each calibre has its own, and the amplitude is worked out from it: a wrong angle gives a wrong amplitude. The rate and the beat error don't depend on it. Look for your calibre in the list; if it isn't there, ask me.
Ask for a lift angleFirst the beat error (the stud carrier), then the rate (the regulator), then check in the positions. A low amplitude or a large spread between positions can't be regulated away: the watch needs a service. Regulating step by step is a chapter of the course.
The course A serviceWith a good microphone the rate and the beat error are right; the amplitude stays an estimate. A cheap sound card can shift the rate by a few seconds a day: the shift is the same in every position, so the spread between them stays right. The sound never leaves your device.
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