Citizen 0S2A User 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)μm1200(～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.

4. INSTRUCTION MANUA
L
A) DISPLAYS AND BUTTONS
B) SETTING THE TIME
1. Pull the crown out to 2nd Click Position.
2. Turn the crown to set the hour and minute hands.
C) SETTING THE DATE
* If the date is set between the hours of around 9:00 PM and 1:00 AM, the date may
not change on the following day.
1. Pull the crown to the 1st Click Position.
2. Turn the crown counterclockwise to set the date.
3. After the date has been set, push the crown back to the normal position.
D) USING THE CHRONOGRAPH
This chronograph is able to measure and display time in 1/1 second united up to
maximum of 59 minute and 59 second.
Measuring time with the chronograph
1.The chronograph can be started and stopped each time button "PB1" is pressed.
2.To reset, press button "PB2" resets the chronograph second & minute hands return to the 0 positi
o
"A"
RESET "A" TIME MEASUREMENT STOP
"B" "A"
"B"

E) CHRONOGRAPH RESET (INCL. AFTER REPLACING BATTERY)
This procedure should be performed when the chronograph second hand
do not return to the 0 second position after the chronograph has been reset,
and including after the battery has been replaced.
1. Pull the crown to the 2nd Click Position.
2. Press the button "PB1" once to set the chronograph second hand ahead one scale,
or keep pushing to set the chronograph second hands quickly.
3. Once the chronograph second hand has been zeroed, reset the time and return the crown to its
normal position.
* Do not return crown to normal position while chronograph second hand
return to 12:00 (ZERO) position.
Hand stops on the way when crown are returned to normal position and these
positions are recognized as 12:00 (ZERO) position.
These specifications might be changed without prior notice.