Epson YM82A Guide

Watch Movement Specification and Drawing
CHRONOGRAPH
Cal. YM82A
Movement Size
Casing Diameter
Height
Battery Life
12’’’
Ø27.0mm
3.7mm
3 years

Date: 30/Jan./'15
Cal. YM82A
Items Rev. Page
Specifications 01 1
Appearance 01 2
Casing 01 3
Hand fitting 01 4
Hand setting stem 01 5
Magnetic shield plate 01 6
Dial-01 01 7-01
Dial-02 01 7-02
Holding ring for dial-01 02 8-01
Holding ring for dial-02 02 8-02
Attention for assembly 01 9
Attention of casing part structure 01 10
Attention of dial design 01 11
Operation-01 01 12-01
Operation-02 01 12-02

Date :
1. MOVEMENT DIMENSIONS
Outside diameter
φ
27.60mm (12H-6H)
×
24.00mm (3H-9H)
Casing diameter
φ
27.00mm (12H-6H)
Total height
3.7mm (including battery)
2. TIME STANDARD
Type of quartz oscillator
Tuning fork
Frequency of quartz oscillator
32,768 Hz
Accuracy
±
20 seconds per month (on wrist)
Operating temperature range
−
5
℃
to
＋
50
℃
Regulation device
Nil (Pre-adjusted)
3. INDICATOR / FUNCTIONS
3 Hands
Hour / Minute / Second chronograph (Center)
Small hands
1/100 second chronograph / 1/10 second chronograph (12H)
40 minute chronograph (6H) / Small second (9H)
Calendar
Instant setting device for date calendar
Reset switch
System-reset switch
Power depletion warning function (BLD)
(Small second hand moves at 2-second intervals)
Chronograph
4. FEATURES
Jewels
0 Jewels
Anti-magnetism
Over 1600A/m (Direct current magnetic field)
Maximum unbalance of hands
Small second hand
: 0.03
μ
N
・
m
1/100 second chronograph hand
: 0.005
μ
N
・
m
1/10 second chronograph hand
: 0.025
μ
N
・
m
40 minute chronograph hand
: 0.03
μ
N
・
m
Second chronograph hand
: 0.06
μ
N
・
m
Minute hand
: 0.70
μ
N
・
m
Moment of Inertia
Second chronograph hand
: less than 0.2
μ
g
・
m²
5. BATTERY
Type / Size
Silver oxide battery /
φ
9.5mm
×
t 2.73mm
Recommended battery
SR927W
Nominal voltage
1.55 V
Battery life
Approx. 3 years
(120 minutes chronograph operation per day)
Driving current consumption
Approx. 0.80
μ
A
Operation stopping voltage
0.9 V
6. SEPARATED PARTS (Parts code)
Hand setting stem
0351584 (Standard) or 0351585 (Long)
Holding ring for dial
0866650 (Standard) or 0866789 (Special)
Battery
SR927W
Magnetic shield plate
4259519
A.C. comment seal
0110705
7. TEST OF ACCURACY
Equipment to be used
SEIKO quartz tester QT-99, QT2100
Greiner quartz timer-C , Witschi Q-tester 4000
Duration of measurement
10 seconds
Microphone to be used
Electromagnetic detection type
All specifications are subject to change without notice.
Cal.
Rev. : 01
30/Jan./'15
YM82A Specifications
Analog Quartz 12''' Center second Chronograph Movement
The chronograph can measure up to 41 minutes in 1/100 second
increments, capable of timing 120 minutes.
P. 1