Citizen CTZ-B8155 User manual

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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.
Visit the Citizen website (http://www.citizenwatch-global.com/) to view visual guides
for operation of your watch. Some models may be equipped with external features
(calculation scale, tachymeter, etc.). Visual guides for operation of such external
features can also be found on the website.
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.

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Safety precautions — IMPORTANT
This manual may contain certain safety advisories. Your watch should be used in
accordance with these advisories at all times to ensure optimal enjoyment of your
watch and to prevent injury to yourself, other persons and/or damage to property.
Understand the meaning of the following symbols and read pages from 56 to 69.
■ 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.

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The following must be done before using the watch:
●Checking the power reserve Page 16
Check the charge level of the watch.
●Setting the World Time Page 18
Select the city or time difference for which you want to indicate the time and date.
●Checking the time signal reception Page 17
Check the result of the time signal reception.
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 9to 15.
Before using the watch

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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 an authorized 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 the watch Before using the watch

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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.
Before using the watch Before using the watch

6
Before using the watch ............... 3
Component identification ........... 8
Recharging your watch................ 9
Checking the power reserve.......16
Checking the time signal
reception ...............................17
Setting the World Time .............18
Notes on the time signal
reception ...............................26
Receiving the time signal manually
(On demand reception)...........34
Switching Summer Time and
standard time ........................36
Adjusting the time/calendar
manually................................42
Table of contents

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Checking and correcting the current
reference position ..................46
Troubleshooting .......................50
Resetting the watch
—All Reset ............................54
Eco-Drive Watch Handling
Precautions............................ 56
Water resistance .......................60
Precautions and usage
limitations .............................63
Specifications............................70

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Component identification
The illustrations in this instruction manual may differ from the actual appearance of your
watch.
Hour hand
Second hand
Crown
Crown position
Minute hand
Lower right button ( )
Date indication
City or time difference
indication
Signal reception indication
• OK/NO: Reception result
• RX: Reception in progress
Summer Time indication
(ON/OFF)

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Recharging your watch
This watch has a rechargeable cell which is charged by
exposing the dial to light, such as direct sunlight or
fluorescent lamps.
After taking off the watch, put it in a location where the dial
is exposed to bright light, such as by a window.

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The charge of the watch is low if the second
hand rotates counterclockwise when you
check the power reserve (page 16) or the
time signal reception (page 17).
You can operate the watch as usual.
However, the watch needs to be charged.
After rotating
counterclockwise ...
Indicates the
reception result
Recharging your watch Recharging your watch

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In addition, for optimal performance, perform the following:
• Expose the watch with the dial facing towards direct sunlight for five to six hours
at least once a month.
• Avoid leaving the watch in a dark place for long periods of time.
Caution
• When the watch is regularly covered with long sleeves, it may not be charged
sufficiently. Try to keep the watch exposed to light sufficient for charging.
• Do not charge the watch at a high temperature (about 60˚C (140˚F) or higher).
Recharging your watch Recharging your watch

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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 4 minutes 1.5 hours 25 hours
Outdoors (cloudy) 10,000 14 minutes 4 hour 60 hours
20 cm (7-7/8
inches) away from
a fluorescent lamp
(30W)
3,000 40 minutes 12 hours 150 hours
Interior lighting 500 4 hours 80 hours
Recharging your watch Recharging your watch

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To charge the rechargeable cell fully, it is recommended to expose the dial to
direct sunlight. A fluorescent lamp or interior lighting does not have sufficient
illumination to charge the rechargeable cell fully.
• When fully charged, the overcharging prevention function works automatically.
The accuracy or parts of the watch will not be affected by extra charging.
Run time
Fully charged to fully discharged:
Approximately six months (at normal operation)
Approximately three years (with power save feature)
Recharging your watch Recharging your watch

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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. Charge the watch by exposing
the dial to light.
• When the watch is sufficiently charged, the second hand
will move normally.
• If you have not charged the watch for several days since
the insufficient charge warning movement began, the
watch will run out of power and stop.
Caution
Even when the second hand moves once every two seconds, the current time and
date are indicated. However, operations and signal reception are not possible.
Recharging your watch Recharging your watch

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Power save feature
When the watch is not exposed to light for a long period of time, such as when you
store it in the dark, the minute hand and second hand automatically stop to save
power. However, the watch still keeps the time.
• When the crown is in position or , the power save feature will not activate.
• The power save feature can not be activated manually.
To cancel the power save feature
When the watch is exposed to light sufficient for charging, the power save feature is
automatically canceled and normal time indication will resume.
After the power save feature is canceled, you should receive the time signal manually.
See pages 34 and 35.
• The power save feature cannot be canceled by operating the crown or buttons.
Recharging your watch Recharging your watch

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Checking the power reserve
1. Ensure that the crown is in position .
2. Press the lower right button briefly.
The second hand moves to indicate the power reserve.
The second hand
indicates “OK” or “NO”
The watch is sufficiently
charged.
The second hand rotates
counterclockwise, then
indicates “OK” or “NO”
The charge of the watch is low.
Charge the watch. See pages 9
to 15.
• “OK” and “NO” indicate the reception result of the
time signal and no relationship to the power reserve.
3. Press the lower right button briefly to finish the
procedure.
The current time is indicated.
• The current time will be indicated automatically after
10 seconds even without pressing the button.

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Checking the time signal reception
1. Ensure that the crown is in position .
2. Press the lower right button briefly.
The second hand indicates the
reception result.
OK Reception has succeeded.
NO Reception has failed.
When reception has failed, see
page 32.
3. Press the lower right button
briefly to finish the procedure.
The current time is indicated.
• The current time will be indicated automatically after
10 seconds even without pressing the button.
When reception
has succeeded

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By setting the city or time difference from UTC, the local time and date is shown.
Select the city or time difference to indicate the current time and date.
• Whether you select the city or time difference depends on the appearance of your
watch.
Watch appearance for setting the city Watch appearance for setting the time difference
See pages 19 and 22 to 25. See pages 20 to 25.
Setting the World Time
City indication Time difference indication