Citizen H240 User manual

1
To determine the movement number
Your watch features a case number engraved on the
case back (refer to figure to the right).
The first four characters of the case number
represent the movement caliber number of the
watch.
In the example on the right, “1234” is the
movement number.
Engraving position example
The engraving position may differ
depending on watch model.
Thank you for your purchase of this Citizen watch.
Before using the watch, read this instruction manual carefully to ensure
correct use.
After reading, be sure to store this manual in a safe place should it be
needed for future reference.

2
Safety precautions
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.
■ Safety advisories are categorized and depicted in this manual as follows:
DANGER Highly likely to cause death or serious injury
WARNING May cause serious injury or death
CAUTION May or will cause minor or moderate injury or damage

3
■ Important instructions are categorized and depicted in this manual as follows:
Warning (caution) symbol followed by instructions that
should be followed and/or precautions that should be
observed.
Warning (caution) symbol followed by prohibited use and/or
operation advisory.
<Notes before use—Protective stickers>
Prior to the watch being shipped from the manufacturing plant, its glass, case, metal
band, and metal parts of the clasp are covered with stickers to protect them from
getting fingerprints or scratches during transit from the plant to the store.
If the watch is worn without first removing these stickers, 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.
For this reason, please be sure to peel off the stickers before wearing the watch.

4
Before using the watch
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.

5
This watch has a rechargeable cell which is charged
by exposing the dial to light such as direct sunlight
or fluorescent lamps.
Expose the dial to light regularly to charge the watch.
For details of charging, see pages 10 to 15.

6
Before using the watch................ 4
Component identification............ 8
Recharging your watch..............10
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
Checking and correcting the current
reference position ..................46
Table of contents

7
Troubleshooting........................50
Resetting the watch
—All Reset ............................54
Eco-Drive (solar powered) Watch
Handling Precautions .............56
Water resistance .......................60
Precautions and usage
limitations .............................63
Maintenance.............................68
Information ..............................69
Specifications............................70

8
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)

9
How to use the screw down crown and screw down push button
Some models feature a screw down crown and/or screw down push button.
Locking the crown and/or button prevents accidental operation. These must be
unlocked prior to using certain features of your watch such as setting the time or date.
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.
Some models feature a recessed button.
Press the button with a narrow-tipped object such as a wooden toothpick.
Component identification

10
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.
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.
Recharging your watch
After rotating
counterclockwise ...
Indicates the
reception result

11
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.
• Before storing the watch in a dark place for an extended period of time, be sure
to charge it fully.
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 or higher).
Recharging your watch

12
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
Under direct
sunlight or cloudy
weather
20 cm (7-7/8 inches)
away from a fluorescent
lamp (30 W)
Interior
lighting
Illuminance (Lx) 10000 to 100000 3000 500
Charging time for the
second hand to move
normally for one day
4 to 14 minutes 40 minutes 4 hours
Charging time for the
second hand to start
moving normally when the
rechargeable cell is empty
1.5 hours to 4 hours 12 hours 80 hours
Charging time for the
rechargeable cell to become
fully charged when the
rechargeable cell is empty
25 to 60 hours 150 hours
Recharging your watch

13
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)
Power reserve upon insufficient charge warning function (page 14):
Approximately six days
Recharging your watch

14
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 six days or more
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

15
Power save feature
When the watch is not exposed to light for more than seven days, 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

16
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 10
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.

17
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

18
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