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GENERAL INFORMATION
WATCH SCOPE,
EXPERIENCE YOUR WATCH
Watch Scope is a instrument that enables you to make a full check up of
your mechanical watches, made up of an Android or iOS application and a
watch stand with an integrated electronic measuring system.
PACKAGE CONTENTS
- One watch stand
- One connecting cable
- One user guide with the activation code
Watch Scope allows you to measure several of your watch’s key elements:
Frequency : The number of vibrations produced by the watch’s
balance per hour. The higher the frequency, the more precise the
balance. The vibrations made by the balance produce a watch’s tic-
king. Frequency is measured in a/h (alternance per hour).
Rate variation : The rate performance indicates the deviation of
your movement, running either too fast or slow, in seconds per day.
For the record, a chronometer certified by the COSC should have
an average rate of between -4 and +6 seconds per day. The rate is
measured in s/d (seconds per day).
Beat error: Indication of an asymmetrical oscillation of the balance
wheel. A “perfect” movement should have a beat error of 0ms, and
if it doesn’t, the balance wheel is oscillating further in one direction
than in the other. The beat error is measured in ms (milliseconds).
Amplitude (of the balance spring): The amplitude values of today’s
watches are around 270° - 310°. With age, the lubricants break
down and this value progressively decreases over time. The ampli-
tude is measured in ° (degrees).
Lift angle: When listening to the sound produced by a watch, we
only hear its ticking. However, the sound of a watch’s beat is more
complex and each “tick” is made up of three different pulses.The
angle that the balance wheel travelled between the first and third
noise is called the “lift angle”. The lift angle is a geometric feature of
a movement and is used to calculate the balance wheel’s amplitude.
If you don’t know the lift angle of your movement, you can find it
thanks to the link below:
http://www.lepsi.ch/lift-angle/
