Casio 5054 User manual

Module No. 5054
MO0901-EB

E-1
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to read this manual carefully.
•Be sure to keep all user documentation handy for future reference.
Keep the watch exposed to bright light
The electricity generated by the solar cell of the watch is
stored by a built-in battery. Leaving or using the watch
where it is not exposed to light causes the battery to run
down. Make sure the watch is exposed to light as much as
possible.
•When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright
light.
•You should try to keep the watch outside of your sleeve
as much as possible. Charging is reduced significantly if
the face is even only partially covered.
l
l
l
l
l
l
l
l
l
l
l
Bright Light
Solar cell

E-2
•The watch continues to operate, even when it is not exposed to light. Leaving the
watch in the dark can cause the battery to run down, which will result in some watch
functions to be disabled. If the battery goes dead, you will have to re-configure watch
settings after recharging. To ensure normal watch operation, be sure to keep it
exposed to light as much as possible.
All
functions
enabled
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Charge
Rechargeable battery
Bright Light
Electrical
energy
Solar cell
(Converts light to
electrical power.)
Some or all
functions
disabled
LEVEL 1
LEVEL 2
LEVEL 3
LEVEL 4
Dis-
charge
Battery charges in the light. Battery discharges in the dark.

E-3
•The actual level at which some functions are disabled depends on the watch model.
•Frequent display illumination can run down the battery quickly and require charging.
The following guidelines give an idea of the charging time required to recover from a
single illumination operation.
Approximately 5 minutes exposure to bright sunlight coming in through a window
Approximately about 8 hours exposure to indoor fluorescent lighting
•Be sure to read “Power Supply” (page E-49) for important information you
need to know when exposing the watch to bright light.
If the display of the watch is blank...
If the display of the watch is blank, it means that the watch’s Power Saving function
has turned off the display to conserve power.
•See “Power Saving Function” (page E-70) for more information.
Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any
damage or loss suffered by you or any third party arising through the use of this
product or its malfunction.

E-4
About This Manual
•Depending on the model of your watch, display text
appears either as dark figures on a light background or
light figures on a dark background. All sample displays
in this manual are shown using dark figures on a light
background.
•Button operations are indicated using the letters shown
in the illustration.
•Each section of this manual provides you with the
information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference”section.
•
To ensure that this watch provides you with the years of
service for which it is designed, be sure to carefully read
and follow the instructions under “Operating Precautions”
and “User Maintenance.”

E-5
Contents
General Guide ......................................................................................................... E-8
Radio-controlled Atomic Timekeeping ............................................................... E-10
World Time ............................................................................................................. E-29
Stopwatch .............................................................................................................. E-34
Countdown Timer .................................................................................................. E-36
Alarms .................................................................................................................... E-40
Illumination ............................................................................................................ E-45
Power Supply ........................................................................................................ E-49
Timekeeping .......................................................................................................... E-57
Hand Home Position Correction .......................................................................... E-66
Reference .............................................................................................................. E-70
Specifications ....................................................................................................... E-79
Operating Precautions ......................................................................................... E-82
User Maintenance ................................................................................................. E-91

E-6
Procedure Lookup
The following is a handy reference list of all the operational procedures contained in
this manual.
To specify your Home City ................................................................................... E-12
To perform manual receive .................................................................................. E-24
To check the latest signal reception results ...................................................... E-26
To view the current time in another time zone ................................................... E-31
To toggle a city code time between Standard Time and
Daylight Saving Time ...................................................................................... E-32
To swap your Home City and World Time City ................................................... E-33
To measure times with the stopwatch ................................................................ E-35
To use the countdown timer ................................................................................ E-37
To configure countdown start time and auto-repeat settings .......................... E-38

E-7
To set an alarm time ............................................................................................. E-41
To turn an alarm on and off .................................................................................. E-43
To turn the Hourly Time Signal on and off .......................................................... E-44
To illuminate the display manually ...................................................................... E-45
To turn the auto light switch on and off .............................................................. E-48
To set the time and date manually ...................................................................... E-58
To change the Daylight Saving Time (summer time) setting ............................ E-63
To specify the Dual Time City .............................................................................. E-65
To trigger the auto hand home position correction manually .......................... E-67
To adjust the home positions manually .............................................................. E-68
To recover from the sleep state ........................................................................... E-71
To turn Power Saving on and off ......................................................................... E-72

E-8
General Guide
•Press Cto change from mode to mode.
•In any mode (except a setting mode), press Bto illuminate the display for about
one second.
Timekeeping Mode
Press C.
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E-9
Alarm Mode (page E-40) Countdown Timer Mode (page E-36)
World Time Mode (page E-29) Stopwatch Mode (page E-34)
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