DAILY RATE

Measurement of the daily rate on a timegrapher (+10.7 s/day)

The daily rate is the daily deviation, expressed in seconds per day, between the time indicated by a watch and the reference time. It is a fundamental criterion in many chronometric test procedures. The measurement of a watch’s rate (instantaneous or defined) is generally carried out by acoustic detection (timegrapher), and more rarely by optical detection.

Useful links:

– Timing operations
– The balance wheel
– Daily rate adjustment
– Chronometer certification (ISO 3159)