Citizen QUARTZ ECO-DRIVE EP7XXX CTZ B6815 User manual

CITIZEN QUARTZ
ECO-DRIVE
Model No. EP7XXX
Cal. No. A23❈
• INSTRUCTION MANUAL
CTZ B6815
A. BEFORE USING
This watch is not powered by an ordinary battery,
but by converting light energy into electrical energy.
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 40 days
without further charging.
To use this watch comfortably, make sure that the
watch is always recharged before it stops.
There is concern of overcharging this watch.
(Overcharging Prevention Function is included.)
We recommend that you recherge the watch
every day.
B. SETTING THE TIME AND CALENDAR
 Setting the time
1. Stop the second hand at the 0 second position by
pulling the crown out.
2. Turn the crown to set the time.
3. After setting the time, firmly push the crown back
in to the normal position.
 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. After setting the time, firmly push the crown back
in to the normal position.
 Setting the calendar
Adjusting 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. After you have set the calendar, be sure to firmly
return the crown to its normal position.
Before using, expose to light and make sure
the watch is sufficiently charged.
See “F. TIME REQUIRED FOR CHARGING” for
charging time reference.

C. FUNCTIONS OF SOLAR POWERED WATCH
If the charge becomes insufficient, a warning
function will operate and the display changes, as
below.
 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
the correct time, but about a day 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.
 Quick Start Function
The watch will stop if it is completely discharged.
It will operate within 10 seconds or so, after it is
exposed to light.
(However, the time to start may vary according to
the brightness of the light.)
 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 hitch movement will
continue.
 Overcharge Prevention Function
You can recharge without worry
Once the secondary battery is fully charged, the
overcharging prevention feature comes into
operation and prevents overcharging.
D. 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 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.
 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, take a distance about 50cm from the light
source to prevent extremely high temperature.
E. REPLACING THE SECONDARY BATTERY
Unlike ordinary batteries, the secondary battery
used in this watch doesn’t have to be
periodically replaced due to repeated charging
and discharging.
CAUTION
Never use another battery different from the
secondary battery used in this watch.
The watch structure is so designed that a different
kind of battery other than that specified cannot be
used to operate it. In case a different battery such
as a silver battery is used by some chance, there is
a danger that it will be overcharged to burst, causing
damage to the watch and even the human body.

F. TIME REQUIRED FOR CHARGING
Time required for recharging may vary according to
the design (colour of the dial, etc.) and operating
environment. The following table will serve you as a
rough reference. *The recharging time is the time
when the watch is continuously exposed to radiation.
Full recharging time
(Empty to full)...........The time for fully recharge from
stopped.
One day usage........The time required for the watch
to run for one day with one
second interval movement.
G. IN THESE CASES
[If the watch warns that the energy
is running short]
The second hand starts moving at two
second intervals in order to warn the
watch will stop functioning after
approximately 24 hours. (Insufficient
charge warning function)
In such a case, expose your watch to light for a
while to cancel the warning. (The second hand
returns to moving at one second intervals when the
energy is recharged.) If the watch is left short of
energy, it will stop functioning after a day or so.
[If the watch warns you to set the
time.]
When the watch that has stopped is
exposed to light, the second hand
starts a hitch movement. (Quick start
function)
The time elapsed before the second hand starts
moving depends on the illuminance of the light.
Even so, the second hand continues the hitch
movement to tell you that the watch indicates an
incorrect time because it has stopped. (Time
setting warning function)
In such a case, set the hands to the correct time.
* If the watch is sufficently exposed to light, the
second hand will soon switch to moving at two
second intervals in order to warn that the energy is
running short.

H. PRECAUTIONS
1. Resistance to water
Check the chart to determine the water resistant
properties of this watch.
2. Avoid temperature extremes
Avoid leaving your watch in extremely warm or cold
locations for long periods of time.
• This may cause your watch to gain or lose time and
affect its other function.
• The watch restores its original accuracy if it is
placed in normal temperature.
3. Avoid strong shock
This watch will withstand the bumps and jars normally
incurred while playing and during sports activities.
Avoid dropping your watch on the ground or
subjecting the watch to severe shock which may
cause malfunction or damage.
4. Avoid strong magnetic fields
Keep your watch out of the immediate vicinity of
strong magnets. Generally, your watch is not affected
by magnetic fields from such household appliances
as television sets and stereo equipment.
5. Static electricity
The integrated circuits used in the watch are
sensitive to static electricity. If exposed to intense
static electricity, the watch’s display may lose its
accuracy.
6. Avoid harmful chemicals, solvents and gases
Avoid wearing your watch in the presence of strong
chemicals, solvents and gases. If your watch comes
in contact with materials such as gasoline, benzine,
paint thinner, alcohol, spray cosmetics, nail polish,
nail polish remover, adhesives or paint,
discolouration, deterioration or damage to the case,
band, and other components may occur.
7. Keep your watch clean
It may become difficult to pull out the crown due to
dirt and dust getting caught between the crown and
the watch case when the watch is worn for long
periods of time. To help prevent this from happening,
turn the crown freely back and forth occasionally
while it is in the normal set position.
Wipe off any water and moisture that adheres to the
case, glass and band with a soft, clean cloth.Any dirt
left on the case or band may cause skin rash.
Awatchband will easily become soiled with dust and
perspiration because it is in direct contact with the skin.
Even a stainless or gold-plated band may begin to
corrode if it has not been cleaned for a long period
of time.
Mesh bands, because the meshes are very fine, will
lose their particular “flexibility” if they are left soiled
for a long time.
Metal watch bands should be washed periodically to
keep them looking beautiful at all times.
Metal watchbands are usually washed with a brush
in mild, soapy water and well wiped with a soft,
absorbent cloth to make sure all water is removed.
Pay attention to prevent any water from getting
inside your watch when the band is washed.
8. Periodic inspection
Getting your watch checked once in two or three
years is recommended to ensure long use and
trouble-free operation.
H. SPECIFICATIONS
1.Type Analog Quartz watch with
3 hands
2. Accuracy: Within ± 20sec/month
(within a normal temperature
range of +5°C/41°F to
+35°C/95°F)
3. Quartz oscillator 32,768Hz
frequency:
4. IC: C/MOS-LSI (1pc.)
5. Operating temperature:
range -10°C/14°F to +60°C/140°F
6. Display features: Time (hour, minute, second
hands)
Calendar (date)
7. Additional features: Insufficient charge warning
function
Quick start
Time setting warning
Overcharge prevention
8. Battery Secondary battery
* Specifications are subject to change without prior
notice.