Citizen Eco-Drive BN4021-02E User manual

INSTRUCTION MANUAL

ENGLISH
FRANÇAIS
ESPAÑOL
DEUTSCH
ITALIANO
PORTUGUÊS
中文（繁体字）
中文（簡体字）

1
Thank you for your purchase of this Citizen watch.
Before using the watch, read this instruction manual carefully to ensure correct use.
After reading the manual, store it in a safe place for future reference.
Be sure to visit the Citizen website at http://www.citizenwatch-global.com/ . Here
you will find a variety of information such as electronic setting guides, answers to
frequently asked questions, Eco-Drive recharging information and more.
To check the movement number
A case number—4 alphanumeric characters and
6 or more alphanumeric characters—is engraved
on the case back. (Figure on the right)
The first 4 characters of the case number
represent the movement number of the watch.
In the example on the right, “ ” is the
movement number.
Engraving position example
The engraving position may differ
depending on watch model.

2
Safety precautions — IMPORTANT
This manual contains instructions that should be strictly followed at all times
not only for optimal use, but to prevent any injuries to yourself, other persons or
property. We encourage you to read the entire booklet (especially, pages 3, 4, and
58 to 71) and understand the meaning of the following symbols:
■ Safety advisories are categorized and depicted in this manual as follows:
DANGER Highly likely to cause death or serious injury
WARNING Can cause serious injury or death
CAUTION Can or will cause minor or moderate injury or damage
■ Important instructions are categorized and depicted in this manual as follows:
Warning (caution) symbol followed by instructions that should be
followed or precautions that should be observed.
Warning (caution) symbol followed by prohibited matters.

Before using this watch
3
About altitude measurement
This watch does not function as a specialized altitude-measuring equipment
certified by any authority or regulating standards. Use the indicated altitude only
as a reference.
WARNING
Do not use the altitude measurement function of this watch in the
following cases:
• When actions or situation judgments involving risks are required.
• When rapid changes in altitude occur such as when skydiving or hang-
gliding.
• When wearing the watch under water such as in skin diving.
• When the situation requires special treatments.
CAUTION
Altitude may be measured improperly in the following cases:
• When air temperature changes sharply.
• When atmospheric pressure largely changes accompanying with changes
of weather conditions.
• When the function is used in places where atmospheric pressure is
conditioned constant (such as in an airplane).

Before using this watch
4
About the compass
This watch does not function as a specialized compass instrument certified by any
authority or regulating standards. Use the indicated compass direction only as a
reference.
WARNING
Do not use the compass function of this watch in the following cases:
• When precise directional indication is required for navigational or other
activities with serious risks.
CAUTION
Compass direction may be measured improperly in the following cases:
• When the watch is not kept level.
• When the surrounding magnetic field is disturbed.
• When air temperature changes sharply.
• When surrounded by reinforced concrete wall or things made of iron.
• When electric cables, electric trains or electric products exist around.
When storing the watch
Avoid places or things with strong magnetism when storing this watch.

5
Before using this watch
After unpacking, the following must be done before using the watch:
• Checking the power reserve see page 16
For optimal performance, ensure your watch is fully charged prior to use. Refer
to pages 12 to 15 for charging procedures and times.
This watch has a rechargeable cell which is
charged by exposing the dial to light.
Expose the dial to direct sunlight regularly to
charge the watch.
For details of charging, see pages 12 to 17.

Before using this watch Before using this watch
6
Band adjustment
We recommend seeking the assistance of an experienced watch technician
for sizing of your watch. If adjustment is not done correctly, the bracelet may
unexpectedly become detached leading to loss of your watch or injury.
Consult your nearest authorized Citizen service center.
Protective stickers
Be sure to remove any protective stickers that may be on your watch (case back,
band, clasp, etc.). Otherwise, perspiration or moisture may enter the gaps between
the protective stickers and the parts, which may result in a skin rash and/or
corrosion of the metal parts.
How to use a specially designed crown/button
Some models are equipped with a specially designed crown and/or push button to
prevent accidental operation.

Before using this watch Before using this watch
7
Screw down crown/button
Unlock the crown/button prior to operate your watch.
Unlock Lock
Screw down
crown
Rotate the crown
counterclockwise until it
releases from the case.
Push the crown in to the
case. With gentle pressure
towards the case, rotate the
crown clockwise to secure
it to the case. Be sure to
tighten firmly.
Screw down
push button
Rotate the locking screw
counterclockwise, and
loosen until it stops.
Rotate the locking screw
clockwise, and tighten
firmly.
Recessed buttons
Press the button with a non-marring narrow-tipped
object such as a wooden toothpick.
• Metal objects may cause marring or scratching of
the button.

8
Features
Eco-Drive
Never needs a new battery.
This watch is fueled by light.
Compass function
Indicates compass direction
by measuring geomagnetism
with the built-in magnetism
sensor
Altitude measurement
Indicates altitude by
measuring atmospheric
pressure with a sensor
“Eco-Drive” is an original technology of Citizen.
CONTENTS
Parts identification (when
measuring altitude)............10
Parts identification (when
using the compass).............11
Charging your watch .............12
Checking the current power
reserve...............................16
Measuring altitude................18
Using the compass ................24
+
-

9
Setting the time....................26
Adjusting the calendar ..........27
Calibrating
altitude indication..............28
Calibrating
compass indication.............32
Checking and correcting
the reference position ........44
Using the scale......................48
Troubleshooting ...................50
Eco-Drive watch handling
precautions........................58
Water resistance ...................62
Precautionary items and
usage limitations ...............65
Information ..........................72
Specifications........................76

10
Parts identification (when measuring altitude)
• Some models are not equipped with the scale and the scale rotation crown.
Button
Button Scale rotation
crown
1 000 m hand
100 m hand
2.5 m hand
Atmospheric
pressure sensor
Scale
Date indicator
Second hand
Hour hand
Minute hand
+
-
m
0
200
800
400
600
0
1
2
3
4
56789
10
x 1000 m
W
E
m
(-10)
(-20)
(-30)
(-40)
(-50)
(-60)
(-70)
(-80)
(-90)
0
50
90
40
80
30
70
20
60
10
1
0
(
-
9
0
)
(
+
5
0
)
S
(
-
5
0
)
m
W
E
6
0
(
-
4
0
)
7
0
(
-
3
0
)
8
0
(
-
2
0
)
9
0
(
-
1
0
)
2
0
(
-
8
0
)
3
0
(
-
7
0
)
4
0
(
-
6
0
)
Crown

11
Parts identification (when using the compass)
A solar cell is placed
under the dial.
• The illustrations in this instruction manual may differ from the actual appearance
of your watch.
+
-
m
0
200
800
400
600
x 1000 m
0
1
2
3
4
5678910
W
E
m
(-10)
(-20)
(-30)
(-40)
(-50)
(-60)
(-70)
(-80)
(-90)
0
50
90
40
80
30
70
20
60
10
1
0
(
-
9
0
)
(
+
5
0
)
S
(
-
5
0
)
m
W
E
6
0
(
-
4
0
)
7
0
(
-
3
0
)
8
0
(
-
2
0
)
9
0
(
-
1
0
)
2
0
(
-
8
0
)
3
0
(
-
7
0
)
4
0
(
-
6
0
)
Crown
Second hand
Hour hand
Minute hand
Power reserve
indication hand
Scale rotation
crown
Scale Compass
hand
Button
Button
Date indicator

12
This watch has a rechargeable cell which is charged by
exposing the dial to light, such as direct sunlight or
fluorescent lamps (refer to pages 14 and 15 for charging
guidelines).
After taking off the watch, put it in a location where the dial is
exposed to bright light, such as by a window.
For optimal performance, be sure to:
Expose it to direct sunlight for 5 or 6 hours at least once a
month.
Avoid leaving the watch in dark places for long periods of time.
Caution
Do not charge the watch at high temperature (about 60 °C (140 °F) or higher).
If the watch is obscured from light by long sleeves frequently, supplemental
charging may be needed to ensure continual operation. Refer to pages 14 and
15.
Charging your watch

Charging your watch
13
When the watch reaches a low charge state (insufficient charge warning
function)
When the power reserve becomes low, the second hand
moves once every two seconds. This is the insufficient charge
warning function. Be sure to fully charge your watch as
outlined on pages 14 and 15.
When the watch is sufficiently charged, the second hand will
move normally.
If you do not charge the watch for 4 days or longer after the
insufficient charge warning movement has begun, the watch will be depleted of
all power and stop.
Caution
When in the insufficient charge warning state, the current time and date are
indicated. However, measurement functions of the watch will not be available
for use.
+
-
400
4
E
(-80)
1
0
(
-
9
0
)
m
W
E
7
0
(
-
3
0
)
8
0
(
-
2
0
)
9
0
(
-
1
0
)
2
0
(
-
8
0
)
3
0
(
-
7
0
)

Charging your watch Charging your watch
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 3 minutes 2 hours 35 hours
Outdoors (cloudy) 10 000 12 minutes 3.5 hours 90 hours
20 cm (8 inches) away
from a fluorescent
lamp (30 W)
3 000 40 minutes 8 hours 290 hours
Interior lighting 500 4 hours 50 hours −

Charging your watch Charging your watch
15
To charge your watch, it is recommended to expose the dial to direct sunlight.
Optimal charging is achieved by exposing the dial to direct sunlight outdoors for
a short time each day.
After charged fully, the watch runs without additional charging for about 11
months.

16
Checking the current power reserve
Power reserve indication (Power reserve indication hand on the
left sub dial)
Power reserve is not indicated during altitude measurement (page 18) or altitude
calibration (page 28).
+
-
0
1
2
3
4
56789
x 1000 m
Power reserve indication hand
Power reserve level scale

17
The power reserve level
Level 3 2 1 0
Level indication
Approximate
duration 340 - 280 days 280 - 180 days 180 - 4 days 4 days or less
Meaning of the
level indication
Power reserve
is sufficient for
all features and
functions.
Power reserve is
sufficient for all
operations at this
level.
Power reserve is
getting low.
Power reserve is
not sufficient for
normal operation.
OK for normal use Charge immediately.
You cannot use measurement functions while the power reserve level is in “0”.
However, you can see the current time.
Frequent use of measurement functions makes the duration shorter.
Checking the current power reserve

18
Measuring altitude
Use the measuring result only as a reference.
Use a commercial specialized device when highly accurate measurement is
required.
Confirm the power reserve is in level “2” or higher before measurement.
1Press button .
Altitude is indicated.
It may take a moment to indicate altitude. Wait until
movement of the hands stop.
If you press button while indicating altitude, the 100
m hand temporarily indicates compass direction (→
page 24).
Press button to return to altitude indication.
2After finishing altitude measurement, press
button to turn off the function.