Ball NM2038, Owner'S Manual

Page: 50 / 251

34 35
※
Test 7
Resumption of the rate: This result is obtained by subtracting the average
mean daily rate of the first two days of testing from the mean daily rate
of the last test day. The resumption of rate can’t be more than 5 seconds.
16. SpringLOCK
®
MODELS: CM1052, DM2076, DM2176, NM3022
In case of shocks, the patented SpringLOCK
®
system guarantees that a
mechanical caliber remains accurate by protecting the balance-spring with a
"cage" designed to absorb the energy created when the watch is subjected to
external impacts. Such impacts can cause standard mechanical movements
to vary by up to approximately 60 seconds a day. The SpringLOCK
®
system
reduces their effect by up to 66%, thus ensuring that the caliber remains
accurate.
※
Test 2
Mean variation in rates: The COSC observes the movement rate in five
different positions (two horizontal, three vertical) each day over 10 days for
a total of 50 rates. The mean variation in rates can’t be more than 2 seconds.
※
Test 3
Greatest variation in rates: The greatest of the five variations in rates in
the five positions can’t be more than 5 seconds per day.
※
Test 4
Horizontal and vertical difference: The COSC subtracts the average of
the rates in the vertical position (on the first and second days) from the
average of the rates in the horizontal position (on the ninth and tenth days).
The difference must be no more than -6 to +8 seconds.
※
Test 5
Greatest deviation in rates: The difference between the greatest daily
rate and the mean daily test rate can’t be more than 10 seconds per day.
※
Test 6
Rate variation due to the temperature: The COSC tests the movement’s rate
at 8 degrees Celsius (46 degrees Fahrenheit) and at 38 degrees Celsius (100
degrees Fahrenheit). It subtracts the cold temperature rate from the hot
temperature rate and divides by 30. The variation must be no more than
0.6 seconds per day.
ENGLISH