Grand Seiko 9S27, Руководство по эксплуатации

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The Grand Seiko Standard defined
Item Unit Standard Cal. 9S27
Special
Standard
Mean daily rate in
six positions
Second(s)/day −3.0
〜
+5.0 −3.0
〜
+8.0 -2.0
〜
+4.0
Mean variation of
daily rate
Second(s)/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(s)/day Less than 4.0 Less than 6.0 Less than 3.0
Variation of rate
between
positions
horizontal and
vertical
Second(s)/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(s)/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(s)/day/
°C
-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(s)/day/
°C
-0.5
〜
+0.5 -0.6
〜
+0.6 -0.3
〜
+0.3
Rate-resumption Second(s)/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 °C
Length of tests 17 days
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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 °C between 38 °C and 8 °C 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 °C between 38 °C and 23 °C 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 it 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.
b
CAUTION
Your Grand Seiko Inspection Certificate is unique and cannot be replaced or reissued if lost
or after maintenance or adjustment.
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THE GRAND SEIKO STANDARD
English