Epson SOLAR Series Guía

Watch Movement Specification and Drawing

SOLAR SERIES

Cal. VS15A

Movement Size

Casing Diameter

Height

Running Time

5 1/2’’’

11.8 × 15.15 mm

2.49mm

Approx. 6 months

Date: 30/Jul./'19

Cal. VS15A

Items Rev. Page

Features 01 1

Specifications 05 2

Appearance 03 3

Casing 04 4

Hand fitting 01 5

Hand setting stem 01 6

Dial-01 01 7-01

Dial-02 01 7-02

Dial-03 00 7-03

Dial-04 00 7-04

Dial-05 00 7-05

Solar cell unit-01 03 8-01

Solar cell unit-02 05 8-02

Solar cell unit-03 00 8-03

Solar cell unit-04 00 8-04

Solar cell unit-05 00 8-05

Attention-01 02 9-01

Attention-02 00 9-02

Date :

1.Solar-powered watch

2. Eliminating the need for battery replacement

3. You can use the dial which light transmittance is more than 30%

It is possible to assemble the dial which transmits light on the solar cell.

It enabled to cover the solar cell color, and you can design variety colors of dials.

4. Running time

Expected running time from full charge to stoppage will be around 6 months.

5. Over charge prevent function is equipped

6. Structure of the separated parts

If the secondary battery is charged more than predetermined voltage, over charge prevent function is

operated to prevent the secondary battery deterioration and breakage.

Unlike conventional quartz watches, this watch does not use a silver oxide battery, thus eliminating the

need for battery replacement.

This watch is a solar-powered watch containing a solar cell underneath the dial to convert any form of

light into '' electrical energy'' and store the power in a secondary battery.

Cal. VS15A Features 24/Apr./'15

Rev. : 01

Solar cell unit

Solar cell lead terminal

Movement

Dial washer

Hand setting stem

Hour wheel

Casing ring

Solar cell

P. 1

Date :

1. MOVEMENT DIMENSIONS

Outside diameter 11.8mm(3-9H) ×15.55mm(12-6H)

Casing diameter 11.8mm(3-9H) ×15.15mm(12-6H)

Total height 2.09mm (Including solar cell : 2.49mm)

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

2 Hands Hour / Minute

Reset switch

Running time Approx. 6 months (After fully charged)

Setting mechanism Crown at normal position : Free

Crown pulled out 1st click : Time setting / Reset

4. FEATURES

Jewels 0 Jewels

Anti-magnetism Over 1600A/m (Direct current magnetic field)

Driving current consumption Approx. 0.16μA (1.35V)

Operation stopping voltage 1.0 V

Solar cell type Amorphous silicon solar cell

Maximum unbalance of hands Minute hand : 0.15μN・m

Hour hand : 0.13μN・m

5. SECONDARY BATTERY (Installed)

Type Titanium-lithium-ion secondary battery

Size φ5.8mm ×t 1.65mm

Nominal voltage 1.5 V

Capacity 0.9 mAh

6. SEPARATED PARTS (Parts code)

Solar cell unit 4020583 (ROUND) 4020536 (ROUND-2)

4020584 (SQUARE-1) 4020532 (SQUARE-2)

4020585 (TONNEAU)

Hand setting stem 0351819

Solar cell lead terminal (2 pcs) 4246644

Hour wheel 0271946

Dial washer 0491735

7. TEST OF ACCURACY

Equipment to be used SEIKO quartz tester QT-99,

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.

Solar Quartz 5 1/2''' Movement / Tow hands(H/M)

VS15A

Rev. : 05

30/Jul./'19

Specifications

P. 2

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