B872 - Citizen
English
Please make sure to check the following
before use.
Please read carefully section G entitled "IF YOUR WATCH IS
A DIVER'S WATCH" to ensure proper use of the watch in the
case your watch is a diver's watch.
If your watch is a diver's watch, the words "AIR DIVER'S
200M" are indicated on the case back (or dial).
If the words "AIR DIVER'S 200M" are not indicated on the case
back (or dial) of your watch, this means that your watch is not
a diver's watch and should not be used for scuba diving.
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CONTENTS
A. BEFORE USING
A. BEFORE USING ...................................................................................... 3
B. SETTING THE TIME AND DATE ............................................................ 4
C. FUNCTIONS OF SOLAR POWERED WATCHES .................................. 6
Insufficient Charge Warning Function ....................................................... 8
Quick Start Function.................................................................................. 8
Time Setting Warning Function ................................................................ 9
Overcharge Prevention Function ............................................................. 9
D. CARE AND HANDLING DURING CHARGING ..................................... 10
E. REPLACING THE SECONDARY BATTERY......................................... 11
F . TIME REQUIRED FOR CHARGING ..................................................... 12
G. IF YOUR WATCH IS A DIVER'S WATCH ............................................. 14
H. PRECAUTIONS ..................................................................................... 22
l . SPECIFICATIONS .................................................................................. 28
This watch is powered not by an ordinary battery, but by converting photo
energy to electrical energy.
Before using, expose to light and make sure the watch is sufficiently
charged.
See "F. TIME REQUIRED FOR CHARGING" for reference charging times.
A secondary battery is used in this watch to store electrical energy. This
secondary battery is a clean energy battery which does not use any toxic
substances such as mercury. Once fully charged, the watch will continue
to run for about 6 months without further charging.
To use this watch comfortably, make sure that the watch is always recharged
before it stops.
There is no risk of overcharging this watch. (Overcharge Prevention Function is
provided)
We recommend that you recharge the watch everyday.
2
3
B. SETTING THE TIME AND DATE
W Setting the time
*If the crown is of the screw- type, set the time and date after first loosening the
screw. Retighten the screw after the time and date have been set.
1. Stop the second hand at the 0 second position by pulling the crown out to the
2nd click.
2. Turn the crown to set the time.
3. After setting the time, firmly push the crown back in to its normal position.
Solar cell
W Setting the date
Date setting
Time setting
7
Crown
1. Pull the crown out to the 1st click.
2. Set the desired date by turning the crown.
• Do not adjust the date when the watch display is reading between 9:00 pm
and 1:00 am, otherwise the date might not change on the following day.
3. After you have set the date, be sure to firmly return the crown to its normal
position.
Normal position
4
5
C. FUNCTIONS OF SOLAR POWERED WATCHES
If the charge becomes insufficient, a warning function will operate and the
display changes as shown below.
Normal time
display
If insufficient charge continues
Insufficient charge
warning display
Time setting
warning display
If insufficiently
charged
Stop
If insufficiently
charged and
time is set
If sufficiently
charged
One second
interval movement
Two second
interval movement
The watch will begin to operate
soon after it is exposed to light due
to the Quick Start Function
Hitch movement
If sufficiently charged and time is set
6
7
W Insufficient Charge Warning Function
The second hand changes to a two second
interval movement to indicate insufficient
recharging.
Even in such a case, the watch keeps correct
time, but about 3 days after the two second
interval movement begins, the watch will stop.
After exposing the watch to light, recharging takes
place and the watch returns to one second
interval movement.
W Quick Start Function
2 sec 2
sec
Two second interval
movement
The watch will stop if it is completely discharged.
It will begin to operate soon after it is exposed to light.
(However, the time to start may vary according to the brightness of the light.)
8
W Time Setting Warning Function
If the watch stops, subsequent exposure to light
allows the Quick Start Function to start again, and
the second hand moves with a hitch to
indicate that the time is incorrect.
In this case, quickly recharge the watch and reset
the time.
Otherwise, the hitch movement will continue.
2 sec 2
sec
Hitch movement
W Overcharge Prevention Function
There is no risk of overcharging.
Once the secondary battery is fully recharged, the overcharging prevention
feature comes into operation and prevents overcharging.
9
D. CARE AND HANDLING DURING CHARGING
E. REPLACING THE SECONDARY BATTERY
W Notes on use
Unlike ordinary batteries, the secondary battery used in this watch does
not have to be periodically replaced due to repeated charging and
discharging.
Take care to charge your watch during use.
Please note that if you wear long sleeves, the watch can easily become
insufficiently charged because it is hidden and not exposed to light.
• When you take the watch off, place it in as bright a place as possible, and it
will always continue to run properly.
W Notes on recharging
• Avoid recharging at high temperatures (over about 60°C/140°F), otherwise the
watch will be damaged during recharging.
(eg) Charging the watch near a light source that easily becomes hot, such as
an incandescent lamp or a halogen lamp.
Charging in a place that easily becomes hot, such as a dashboard.
CAUTION
Never use another battery different from the secondary battery used in this
watch.
The watch structure is designed so that a different kind of battery other than that
specified cannot be used to operate it. In case a different kind of battery such as
a silver battery is used, there is the risk of it becoming overcharged and bursting,
causing damage to the watch and even to the wearer.
When you charge the watch by an incandescent lamp, place the watch about
50cm (20in.) from the light source to prevent the watch from reaching an
extremely high temperature.
10
11
F. TIME REQUIRED FOR CHARGING
* The recharging time is the time when the watch is continuously exposed to
light.
Time required for recharging may vary according to the design (color of the dial,
etc.) and operating environment. The following table will serve as a rough
reference.
Time required
Illuminance
(lux)
Environment
500
Inside an ordinary
office
22 hours
1000
60-70cm (24-28in.) under
a fluorescent light (30W)
3000
12
From the stop state
to one second
movement
One day
usage
1 hour
30 minutes
Full charge
time
11 hours
45 minutes
158 hours
20cm (8in.) under a
fluorescent light (30W)
3 hours
30 minutes
15 minutes
53 hours
10000
Outdoors, cloudy
1 hour
5 minutes
17 hours
100000
Outdoors, summer,
sunny
14 minutes
2 minutes
6 hours
Full charge time ·········· The time to fully recharge after the watch has stopped.
One day usage ··········· The time required for the watch to run for one day with
one second interval movement
320 hours
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G. IF YOUR WATCH IS A DIVER'S WATCH
[1] Precautions when Using during Diving:
* When using a diver's watch, please make sure that you have received the
proper education and training for various types of diving, and observe all
rules.
* Please make sure to use the watch properly based on a thorough
understanding of watch handling and precautions. Please note that failure to
operate the watch in a manner not described in the user's manual may
prevent the watch from functioning properly.
<Before Diving>
* Please make sure that the crown is pushed in firmly and the screw is
securely tightened.
* Please check that the band is securely attached to the watch.
* Please confirm that there are no cracks, scratches, chips or other
abnormalities in the band and glass.
* Please check that the rotating bezel rotates properly.
* Please check that the time and date are set correctly.
14
* Please check that the second hand is moving properly.
If the second hand is moving at two-second intervals, this means that the
watch is not sufficiently charged. Sufficiently charge the watch when this
occurs.
<During Diving>
* Never attempt to turn or pull out the crown underwater. This can cause
defective water resistance or other malfunction.
* Be careful to avoid bumping your watch on hard objects such as diving
equipment or rocks.
<After Diving>
* Completely wash off any sea water, mud or sand adhered to the watch with
pure water after checking that the crown and screw are tightened. Wipe off
any excess moisture with a dry cloth.
15
50
40
30
50
Elapsed time
20
40
30
Remaining time
10
20
Elapsed time: shows that
10 minutes have passed
since 9:10.
10
[2] How to use Rotating bezel
The rotating bezel is a convenient way to keep track of diving time, permitting
the indication of the elapsed and remaining times.
* Turn the rotating bezel counterclockwise, while pushing it. It is locked under
normal conditions to prevent free rotation, and cannot be turned in the
reverse direction for safety reasons.
* Determination of elapsed time: Align the Z mark on the rotating bezel with
the minute hand. The elapsed time is shown by the rotating bezel scale.
* Determination of remaining time: Align the Z mark on the rotating bezel to a
certain required time. The remaining time is read with the ring scale.
Remaining time: shows that
20 minutes remain until
9:25.
The rotating bezel can be used for various other activities besides diving, for
example parking, walking, and keeping track of the remaining time before an
important appointment.
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[3] No decompression limits
The range within which the diver can rise to the surface without rest for
decompression is determined by the depth and elapsed time of the dive. The
ranges are called "No Decompression Limits".
A table of "No Decompression Limits" compiled according to the U.S. Navy
Diving Manual (1993 edition) is printed on the watchband of this watch (there
are some models that do not have this table on the watchband).
No Decompression
Limits
-How to read no decompression limitsDEPTH.m
N.D.TIME
(Max.depth in meter) (No decompression time)
N.D.LIMITS
DEPTH.m
12 200
15 100
18 60
21 50
24 40
27 30
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N.D.TIME
30 25
33 20
36 15
39 10
42 10
45 5
12m(40ft) ………………200Min
15m(50ft) ………………100Min
18m(60ft) ………………60Min
21m(70ft) ………………50Min
24m(80ft) ………………40Min
27m(90ft) ………………30Min
30m(100ft) ……………25Min
33m(110ft) ……………20Min
36m(120ft) ……………15Min
39m(130ft) ……………10Min
42m(140ft) ……………10Min
45m(150ft) ……………5Min
CAUTION
• The table of no decompression limits is provided for one-time diving.
• Since the no decompression limits differ depending on the diver's physical
condition and varies among individuals, use this table as a guideline only.
• In case of diving that requires the diver to take a rest for decompression
before rising to the surface, perform diving following a manual exclusively
compiled for diving.
Example: Read the
table as follows.
In case the maximum
diving depth is
21m(70ft) and the
elapsed time is 50
minutes or shorter, the
diver is not required to
take a rest for
decompression while
rising to the surface.
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[4] Note on the luminous dial
• The luminous paint used for the dial of this watch is mainly made from a
luminescent material, which is harmless to the human body and the
environment since it contains no toxic substances such as radioactive
materials.
This luminous paint stores light of the sun and indoor lighting and emits light in
a dark place. (For example, if the luminous dail is exposed to light of 500 lux
or more for 10 minutes or longer, it will emit light for 3 to 5 hours.) However, its
luminance gradually fades because it discharges stored light. The duration
that the luminous paint emits light differs depending on the illuminance and
distance from the light source when it stores light. If the luminous paint stores
insufficient light, it will not emit light in a dark place, or even if it emits light, its
luminance rapidly fades. Therefore, carefully expose the luminous dial to light
so that the luminous paint stores sufficient light especially before diving. It is
recommended that you use an underwater flashlight to apply light to the watch
during diving.
Watches that use the luminous paint have "N-JAPAN-N" printed on the dial.
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[5] Maintaining Water Resistance
Please have your watch inspected either through your dealer or directly by a
Citizen Service Center every 1 to 2 years to maintain water resistance. Please
have the packing, glass, crown or other components replaced as necessary.
21
H. PRECAUTIONS
For correct use within the design limits of the watch, confirm the level of waterresistance of your watch, as indicated on the dial and case, and consult the table.
CAUTION: Water-resistance performance
There are several types of water-resistant watches, as
shown in the following table.
The unit "bar" is roughly equal to 1 atmosphere.
* WATER RESIST(ANT) xx bar may also be indicated
as W.R. xx bar.
Examples of use
Indication
Moderate exposure
to water (washing, Marine sports (skin
kitchen work,
diving)
swimming, etc.)
Scuba diving (with
air tank)
Saturation diving
(helium enriched
enviroment)
Operation of the
crown with moisture
visible
Dial
Case
(Case back)
Specifications
WATER RESIST or
no indication
WATER
RESIST(ANT)
Water-resistant to 3
atmospheres
OK
NO
NO
NO
NO
NO
WR 50 or WATER
RESIST 50
Water-resistant to 5
atmospheres
OK
OK
NO
NO
NO
NO
WR 100/200 or
WATER RESIST
100/200
WATER
RESIST(ANT) 5 bar or
WATER RESIST(ANT)
WATER RESIST(ANT)
10bar/ 20 bar or
WATER RESIST(ANT)
Water-resistant to
10/ 20 atmospheres
OK
OK
OK
NO
NO
NO
DIVER'S 200M or no
indication
AIR DIVER'S
200M
Water-resistant to
200M (for diving)
OK
OK
OK
OK
NO
NO
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Minor exposure to water
(washing face, rain, etc.)
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• Water-resistance for daily use (to 3 atmospheres): This type of watch is
water-resistant to minor exposure to water. For example, you may wear the
watch while washing your face; however, it is not designed for use
underwater.
• Upgraded water-resistance for daily use (to 5 atmospheres): This type of
watch is water-resistant to moderate exposure to water. You may wear the
watch while swimming; however, it is not designed for use while skin diving.
• Upgraded water-resistance for daily use (to 10/20 atmospheres): This type of
watch may be used for skin diving; however, it is not designed for scuba or
saturated diving using helium gas.
• Although diver's watches for use at depths down to 200 meters can be used
for scuba diving, they cannot be used for saturated diving using helium gas.
CAUTION
• Be sure to use the watch with the crown pressed in (normal position). If your
watch has a screw-type crown, be sure to tighten the crown completely.
• Do NOT operate the crown with wet fingers or when the watch is wet. Water
may enter the watch and compromise water-resistance.
• If the watch is used in seawater, rinse with fresh water afterward and wipe
with a dry cloth.
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• If moisture has entered the watch, or if the inside of the crystal is fogged up
and does not become clear within a day, immediately take the watch to your
dealer or Citizen Service Center for repair. Leaving the watch in such a state
will allow corrosion to form inside.
• If seawater enters the watch, place the watch in a box or plastic bag and
immediately take it in for repair. Otherwise, pressure inside the watch will
increase, and parts (crystal, crown, buttons, etc.) may come off.
CAUTION: Keep your watch clean.
• Leaving dust and dirt deposited between the case and crown may result in
difficulty in pulling the crown out. Rotate the crown while in its normal
position, from time to time, to loosen dust and dirt and then brush it off.
• Dust and dirt tend to be deposited in gaps in the back of the case or band.
Deposited dust and dirt may cause corrosion and soil your clothing. Clean the
watch occasionally.
Cleaning the Watch
• Use a soft cloth to wipe off dirt, perspiration and water from the case and
crystal .
• Use a soft, dry cloth to wipe off perspiration and dirt from the leather band.
25
• To clean a metal, plastic, or rubber watchband, wash away dirt with mild soap
and water. Use a soft brush to remove dust and dirt jammed in the gaps in
the metal band. If your watch is not water-resistant, take it to your dealer.
NOTE: Avoid using solvents (thinner, benzine, etc.), as they may mar the finish.
CAUTION: Operating environment
• Use the watch within the operating-temperature range specified in the
instruction manual.
Using the watch where temperatures are outside the specified range, may
result in deterioration of functions or even stoppage of the watch.
• Do NOT use the watch in places where it is exposed to high temperature,
such as in a sauna.
Doing so may result in a skin burn.
• Do NOT Ieave the watch in a place where it is exposed to high temperature,
such as the glove compartment or dash-board of a car.
Doing so may result in deterioration of the watch, such as deformation of
plastic parts.
26
• Do NOT place the watch close to a magnet.
Timekeeping will become inaccurate if you place the watch close to magnetic
health equipment such as a magnetic necklace or a magnetic latch of a
refrigerator door or handbag clasp or the earphone of a mobile phone. If this
has occurred, move the watch away from the magnet and reset the time.
• Do NOT place the watch close to household appliances that generate static
electricity.
Timekeeping may become inaccurate if the watch is exposed to strong static
electricity, such as is emitted from a TV screen.
• Do NOT subject the watch to a strong shock such as dropping it onto a hard
floor.
• Avoid using the watch in an environment where it may be exposed to
chemicals or corrosive gases.
If solvents, such as thinner and benzine, or substances containing such
solvents come in contact with the watch, discoloration, melting, cracking, etc.
may result. If the watch comes in contact with mercury used in thermometers,
the case, band or other parts may become discolored.
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l. SPECIFICATIONS
1. Type:
2. Accuracy:
Analog Quartz Watch with 3 Hands
Within ±15sec/month (within a normal
temperature range of 5°C/41°F to
35°C/ 95°F)
3. Quartz oscillator frequency:
32,768Hz
4. IC:
C/MOS-LSI (1 pc.)
5. Operational temperature range: -10°C/14°F to +60°C/140°F
6. Display features:
Time: hour, minute, second
Date: date (models with date display)
7. Additional features:
Insufficient charge warning
Quick start
Time setting warning
Overcharge prevention
8. Continuous operating time:
Approx. 6 months (from full recharge to stop)
Approx. 3 days (from two second interval
movement to stop)
9. Battery:
Secondary battery
*Specifications are subject to change without prior notice.
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