Citizen Eco-Drive B872 User manual

Model No.BJ5＊・ BJ8＊
Cal.B870・ B872
CTZ-B8028②
INSTRUCTION MANUAL

ENGLISH
FRANÇAIS
ESPAÑOL
DEUTSCH
ITALIANO
PORTUGUÊS
中文（繁体字）

1
English
Please make sure to check the following before use.
Please read carefully section 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.

2
Contents
Before using ……………………………………………………… 4
Setting the time and date ……………………………………… 6
Functions of solar powered watches ………………………… 8
Insufficient charge warning function……………………… 10
Quick start function ………………………………………… 10
Time setting warning function …………………………… 11
Overcharge prevention function ………………………… 11
Care and handling during charging ………………………… 12
Replacing the rechargeable cell …………………………… 13

3
English
Charging time by environment …………………………… 14
If your watch is a diver's watch ……………………………… 16
Water resistance ……………………………………………… 24
Precautionary items and usage limitations ……………… 26
Specifications ………………………………………………… 32
Contents

4
is 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 suciently
charged.
See "TIME REQUIRED FOR CHARGING" for reference charging times.
A rechargeable cell is used in this watch to store electrical energy.
is rechargeable cell 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.
Before using

5
English
ere is no risk of overcharging this watch. (Overcharge Prevention Function is
provided)
We recommend that you recharge the watch everyday.
Before using

6
Setting the time and date
*If the crown is of the screw- type, set the time and date aer rst loosening the
screw. Retighten the screw aer the time and date have been set.
7
Solar cell
Time setting
Crown
Date setting
Normal position

7
English
■Setting the time
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. Aer setting the time, rmly push the crown back in to its normal position.
■Setting the date
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. Aer you have set the date, be sure to rmly return the crown to its normal
position.
Setting the time and date

8
If the charge becomes insucient, a warning function will operate and the
display changes as shown below.
Functions of solar powered watches
If insufficiently
charged
If sufficiently charged and time is set
Normal time
display
Insufficient charge
warning display
One second
interval movement Two second
interval movement
If sufficiently
charged

9
English
Functions of solar powered watches
If insufficient charge continues
Hitch movement
Stop
The watch will begin to operate
soon after it is exposed to light due
to the Quick Start Function
Time setting
warning display
If insufficiently
charged and time
is set

Functions of solar powered watches
10
■Insufficient charge warning
function
e second hand changes to a two second
interval movement to indicate insucient
recharging.
Even in such a case, the watch keeps correct
time, but about 3 days aer the two second
interval movement begins, the watch will stop.
Aer exposing the watch to light, recharging
takes place and the watch returns to one
second interval movement.
■Quick start function
e watch will stop if it is completely discharged.
It will begin to operate soon aer it is exposed to light.
(However, the time to start may vary according to the brightness of the light.)
2 sec
2 sec
Two second interval
movement

11
English
Functions of solar powered watches
■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.
■Overcharge prevention function
ere is no risk of overcharging.
Once the rechargeable cell is fully recharged, the overcharging prevention feature
comes into operation and prevents overcharging.
2 sec
2 sec
Hitch movement

12
Care and handling during charging
■Notes on use
Take care to charge your watch during use.
Please note that if you wear long sleeves, the watch can easily become
insuciently charged because it is hidden and not exposed to light.
•Whenyoutakethewatcho,placeitinasbrightaplaceaspossible,anditwill
always continue to run properly.
■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.
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.

13
English
Replacing the rechargeable cell
Unlike ordinary batteries, the rechargeable cell used in this watch does not
have to be periodically replaced due to repeated charging and discharging.
CAUTION
Neveruseanotherbatterydierentfromtherechargeablecellusedinthiswatch.
ewatchstructureisdesignedsothatadierentkindofbatteryotherthanthat
speciedcannotbeusedtooperateit.Incaseadierent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.

14
Charging time by environment
Below are the approximate times required for charging when exposing the watch
dial to light continuously. Please use this table as a reference only.
Environment Illuminance
(lx)
Charging time (approx.)
To work for
one day
To start working
normally when the
cell is discharged
To become fully
charged when the
cell is discharged
Outdoors (sunny) 100,000 2 minutes 14 minutes 6 hours
Outdoors (cloudy) 10,000 5 minutes 1 hour 17 hours
20 cm (7-7/8 inches)
from a fluorescent
lamp (30W)
3,000 15 minutes 3.5 hours 53 hours
Interior lighting 500 1.5 hours 22 hours 320 hours

Charging time by environment
15
English
* e recharging time is the time when the watch is continuously exposed to
light.
•To become fullycharged when the cell is discharged
e time to fully recharge aer the watch has stopped.
•To work for one day
e time required for the watch to run for one day with one second interval
movement

16
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 rmly and the screw is securely
tightened.
* Please check that the band is securely attached to the watch.
* Please conrm that there are no cracks, scratches, chips or other
abnormalities in the band and glass.
* Please check that the rotating bezel rotates properly.

17
English
If your watch is a diver's watch
* Please check that the time and date are set correctly.
* 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 suciently charged. Suciently charge the watch when this
occurs.
<During Diving>
* Never attempt to turn or pull out the crown underwater. is 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oanyseawater,mudorsandadheredtothewatchwith
purewateraercheckingthatthecrownandscrewaretightened.Wipeo
any excess moisture with a dry cloth.

18
If your watch is a diver's watch
[2] How to use Rotating bezel
e 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▼mark on the rotating bezel with
the minute hand. e elapsed time is shown by the rotating bezel scale.
*Determinationofremainingtime:Alignthe▼mark on the rotating bezel to
a certain required time. e remaining time is read with the ring scale.