[Neurohirurg]

GS

Сообщение от Nefashu

GRAND SEIKO имеют собственную сертификацию. На выходе точность -3/+5 сек (по нима ничего еще не копал и буду признателен если кто-то даст информацию)

вы же сами таблицу привели...



9S56.PDF
12 страница

еще
http://www.grand-seiko.com/manufactu...anical_02.html

COSC

Seven things tested for mechanical watches over 15 days via COSC >>
Score 5.0 (1 person) March 31 2008, 7:19 PM


1. Over the first 10 Days the average daily rate must be within -4/+6 seconds
2. Mean variation in rate cannot be higher than 2 seconds in any single position
3. Greatest variation in rate between any 2 days cannot be more than 5 seconds in any single position
4. The difference of the rates in the vertical and horizontal positions cannot be more than -6/+8 seconds
5. The difference between the main daily rate and any individual rate cannot be more than 10 seconds
6. Variation in temperature cannot be more than 0.6seconds per degree
7. Difference between the mean daily rate of the first two dates compared with the the last two dates cannot be more than 5 seconds.

There are three labs all located in Switzerland that do the COSC certification: One in Geneve, one in Le Locle, and one in Biel/Bienne. The entire testing process takes 15 days, and the watches are tested in five positions. The watches are tested as movement only, and do not come with hands or anything. Automatic movements have the rotors detached during testing and three temperatures are tested as well. 23 Degrees Celcius is the main temperature tested.

15 Days for Mechanical watches

Day 1 : 23 Degrees Celcius - Vertical - 6 o’clock up
Day 2 : 23 Degrees Celcius - Vertical - 6 o’clock up

Day 3 : 23 Degrees Celcius - Vertical - 3 o’clock up
Day 4 : 23 Degrees Celcius - Vertical - 3 o’clock up

Day 5 : 23 Degrees Celcius - Vertical - 9 o’clock up
Day 6 : 23 Degrees Celcius - Vertical - 9 o’clock up

Day 7 : 23 Degrees Celcius - Horizontal - Dial Down
Day 8 : 23 Degrees Celcius - Horizontal - Dial Down

Day 9 : 23 Degrees Celcius - Horizontal - Dial Up
Day 10 : 23 Degrees Celcius - Horizontal - Dial Up

Day 11 : 8 Degrees Celcius - Horizontal - Dial Up
Day 12 : 23 Degrees Celcius - Horizontal - Dial Up
Day 13 : 38 Degrees Celcius - Horizontal - Dial Up

Day 14 : 23 Degrees Celcius - Vertical - 6 o’clock up
Day 15 : 23 Degrees Celcius - Vertical - 6 o’clock up