Bedienungsanleitung Seiko 9S86 (Seite 20 von 25) (Englisch)

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The Grand Seiko Standard defined

Item Unit Standard Cal. 9S27 Special

Standard

Mean daily rate in

six positions Second/day −3.0 〜 +5.0 −3.0 〜 +8.0 -2.0 〜 +4.0

Mean variation of

daily rate Second/day Less than 1.8 Less than 3.2 Less than 1.6

Maximum daily

rate between two

consecutive daily

rates in the same

position

Second/day Less than 4.0 Less than 6.0 Less than 3.0

Variation of rate

between

positions

horizontal and

vertical

Second/day -6.0 〜 +8.0 -8.0 〜 +10.0 -5.0 〜 +7.0

Maximum daily

rate between

mean daily rate

and any

individual rate

Second/day Less than 8.0 Less than 13.0 Less than 7.0

Variation of daily

rate per 1 °C

between 8 °C and

38 °C

Second/day/ ℃-0.5 〜 +0.5 -0.6 〜 +0.6 -0.3 〜 +0.3

Variation of daily

rate per 1 °C

between 23 °C

and 38 °C

Second/day/ ℃-0.5 〜 +0.5 -0.6 〜 +0.6 -0.3 〜 +0.3

Rate-resumption Second/day -5.0 〜 +5.0 -6.0 〜 +6.0 4.0

Number of positions in inspection 6 positions

Condition of temperature

in inspection 8, 23, 38 ℃

Length of tests 17 days

36 THE GRAND SEIKO STANDARD

Description of Grand Seiko Standard Terminology

Item Meaning

Position in inspection

Five orientations are specified by the International Standard ISO3159

so as to carry out various kinds of tests for time keeping. In addition

thereto, in the GS inspection, 12 o’clock Up position in the state where

a watch taken off the wrist is placed, is added, six orientations are

specified. (Dial Up, Dial Down, 12 o’clock Up, 3 o’clock Up, 6 o’clock

Up, and 9 o’clock Up)

Mean daily rate in six

positions

Mean value of a total of 12 daily rates measured in six different

positions, respectively, for two days. This is a target value indicating

basic loss/gain per day of a watch, however, it is required to

comprehensively judge the actual accuracy performance in

consideration of other items.

Mean variation of daily rate

Mean value of a total of six variations of daily rates between the first

day and second day when measured in six different positions for two

days each. It indicates the degree which daily accuracy stabilizes in

each position.

Maximum daily rate between

two consecutive daily rates in

the same position

Maximum value of a total of six variations of daily rates between the

first day and second day when measured in six different positions for

two days each. It indicates the degree which accuracy per day changes

at maximum according to positions.

Variation of rate between

positions horizontal and

vertical

Indicates loss/gain in two positions at which a watch is most frequently

used in daily life. It is a difference between mean daily rates for two

days when a watch is placed in the Dial Up position and mean daily

rates for two days when a watch is placed in the 6 o’clock Up position.

Maximum daily rate between

mean daily rate and any

individual rate

Maximum difference value between daily rates for 12 days in the test

initial stage and mean daily rates. It indicates the degree at which the

daily rate varies according to the manner for placing a watch.

Variation of daily rate per 1 °C

between 8 °C and 38 °C

Variation in daily rates per 1 ℃ between 38 ℃ and 8 ℃ in the same

position (Dial Up position). It indicates loss/gain in the temperature

environment (taken-off state from the wrist) where a watch is used.

Variation of daily rate per 1 °C

between 23 °C and 38 °C

Variation in daily rates per 1 ℃ between 38 ℃ and 23 ℃ in the same

position (Dial Up position). It indicates loss/gain in the temperature

environment (worn state of the wrist) where a watch is used.

Rate-resumption

Value obtained by subtracting mean daily rates of initial two days from

daily rate of the last inspection day. It indicates the degree at which

daily rate stabilizes after usage for a predetermined period.

The Grand Seiko Standard Inspection Certificate

○ This certificate accompanies your watch. It shows the precision values achieved by the

movement before the watch was cased and that the movement met the Grand Seiko

Standard. The precision tests were conducted in an artificially controlled environment in

our facility. The certificate shows the caliber number, the movement’s individual number

and the case’s individual number.

○Normal usage accuracy of a mechanical watch varies depending on individual customer’s

use conditions such as winding state of the mainspring by movement amount of the

customer’s arm per day, temperature environment, and position (orientation of a watch).

Accordingly, the actual normal usage accuracy when the watch is used by a customer may

differ from the numerical value of each item specified in the Grand Seiko Standard.

bCAUTION

Your Grand Seiko Inspection Certificate is unique and cannot be replaced or reissued if lost

or after maintenance or adjustment.

THE GRAND SEIKO STANDARD

English

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