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)