Citizen 0S2A Instruction Manual

MOVEMENT SPECIFICATIONS

CAL.0S2A

13-1/2 LINGE, 3 EYES CHRONOGRAPH WITH HIGH HAND

ANALOGUE QUARTZ, 0 JEWEL

BY CITIZEN WATCH CO., LTD. JAPAN
MANUFACTURED IN JAPAN

1. BASIC SPECIFICATIONS

(1) Cal. No.

*TO CONFIRM WITH MOV'T DRAWING ATTACHED

CALIBRE

Ligne
Size*mm

Date
Total height
Battery life
Batter

y

(* 60 minutes chronograph operation per day)

(2) Time standard

Type of quartz : Tuning fork type quartz crystal
Frequency : 32,768Hz
Accuracy : +/-20 s/month worn under normal circumstances

(3) Balanceable weight of hand

Minute hand Max. 0.4 μN.m
Center Chrono Second hand Max. 0.11 μN.m
Other small hands Max. 0.02 μN.m

(4) Function

Chronograph 1/1 sec. basis (Up to 59 min. 59 sec.)

Powercell Saving Reset Mechanism(PSRM)
Over-loading Compensation Device(OLCD)
Digital Frequency Control(DFC) for time adjustmen

t

Eye position of 0S2A is the same as 0S20.

SILVER OXIDE SR927W or equivalent

0S2A

13-1/2

Φ30.80mm

O

5.10mm

A

pprox. 5 years

*

1650(

～

1600)μm

380(～330)μm

350(～300)μm

Center Hands

Height

Small Hands

Height

1200(

～

1150)μm

350(～300)μm

380(～330)μm

0S200S20

750(～700)μm

1200(～1150)μm

Small

Second

24H

0S2A

0S20

Chrono

Minute

2. SEPARATED PART

S

Setting stem x1

Code 065-453
Length from movement center to far end 23.00mm
of setting stem

Thread................................. Ф0.9mm x 8.50mm

3. OTHERS

* Measurement of time rate

The unit(gate) time of measurement must be set at "10 sec." or integer fold
value of 10 sec. owing to the DFC system, and the measurement must be
performed in the form of complete watch.

* Marking on movement

JAPAN

MIYOTA CO.

0S2

A

NO JEWELS

* Typical clearance

Mov't - Caseback minimum 150 microns
Top of hands - Glass 300 - 400 microns *

* subject to the glass, case structure, and the length of hand

* Note

Please use aluminum material hand for Chrono second hand

* TACHYMETER

The tachymeter is the device which measures the speed of an automobile. Knowing is how
many seconds the car covers a distance of 1km, the meter can measure the approximate
average speed per hour during a journey (up to the maximum measurable range of
tachymeter is 60 seconds.)
If the chronograph is started at the same time as measurement, and stopped after 1 km,
the average speed per hour can be determined according to the position of the second
hand. If the car covers the distance of 1km in 45second, the average hourly speed during
the journey will be about 80 km.