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Operation Guide 5075 (OC)
MA0907-EA
Congratulations upon your selection of this CASIO watch.
This watch does not have a city code that corresponds to the UTC offset of –3.5 hours. Because of this, the
radio-controlled atomic timekeeping function will not display the correct time for Newfoundland, Canada.
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.
About This Manual
Button operations are indicated using the letters A through D shown in the
illustration.
Hand Functions
z Hour Hand
x Second Hand
c Minute Hand
v 24-hour Hand
b Left Dial Hands: Indicate a time, in 24-hour format, depending on the current
mode.
n Right Dial Hand: Indicates the current day of the week and current mode.
m Day
This User’s Guide uses numbers shown above to identify watch hands and indicators.
Things to check before using the watch
1. Hold down C for about two seconds to enter the Timekeeping Mode, and then observe the
movement of the
x Second Hand.
Is the x Second Hand moving smoothly at one-second intervals?
Is the x Second Hand moving at two-second intervals
or is it stopped completely?
Go to step 2.
The watch is charged sufficiently. For details
about charging, see “Charging the Watch”.
Power is low. Charge the watch by placing it in a
location where it is exposed to light. For details, see
“Charging the Watch”.
NO
YES
YES
NEXT
2. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To configure Home City settings” to configure your Home City and daylight saving
time settings.
Important!
Proper time calibration signal reception and World Time settings depend on correct Home City, time, and
date settings in the Timekeeping Mode. Make sure you configure these settings correctly.
3. Set the current time.
• To set the time using a time calibration signal
See “To get ready for a receive operation”.
• To set the time manually
See “Configuring Current Time and Date Settings Manually”.
The watch is now ready for use.
For details about the watch’s radio controlled timekeeping feature, see “Radio Controlled Atomic •
Timekeeping”.
Charging the Watch
The face of the watch is a solar cell that generates power from light. The generated power charges a built-in
rechargeable battery, which powers watch operations. The watch charges whenever it is exposed to light.
Charging Guide
Whenever you are not wearing
the watch, leave it in a location
where it is exposed to light.
Best charging performance •
is achieved by exposing
the watch to light that is as
strong as possible.
When wearing the watch, make
sure that its face is not blocked
from light by the sleeve of your
clothing.
The watch may enter a sleep •
state if its face is blocked by your
sleeve even only partially.
Warning!
Leaving the watch in bright light for charging can cause it to become quite hot. Take care when
handling the watch to avoid burn injury. The watch can become particularly hot when exposed to the
following conditions for long periods.
On the dashboard of a car parked in direct sunlight •
Too close to an incandescent lamp •
Under direct sunlight •
Important!
Keep the watch in an area normally exposed to bright light when storing it for long periods. This helps to •
ensure that power does not run down.
Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is •
blocked from exposure to light can cause power to run down. Make sure that the watch is exposed to bright
light whenever possible.
Power Levels
You can get an idea of the watch’s power level by observing the movement of the
x Second Hand in the Timekeeping Mode.
If the • x Second Hand is moving normally at one-second intervals, power is at
Level 1.
If the •
x Second Hand is moving at two-second intervals, power is at Level 2,
which is quite low. Expose the watch to light as soon as possible so it can
charge.
Level Hand Movement Function Status
1 Normal. All functions enabled
2
x Second Hand moves at two-second
intervals.
m Day changes to 1 (home position).
Time calibration signal reception
disabled
3
x Second Hand stopped.
z Hour Hand and c Minute Hand stopped
at 12 o’clock.
All functions disabled
B +
* 6> 5
@
Moves at two-second
intervals.
B +
@ 5
When power drops to Level 3, all functions will be disabled but the watch will continue to keep time •
internally for about one week. If you recharge the battery sufficiently during this period, the analog hands
will move automatically to the correct setting and normal timekeeping will resume. After one week, all
settings (including timekeeping) will be cleared. Recharging the battery will reset all settings to their initial
factory defaults.
Charging Times
Exposure Level (Brightness)
Daily Operation
*1
Level Change *2
Level 3 Level 2 Level 1
Outdoor sunlight (50,000 lux) 8 minutes 2 hours 24 hours
Window sunlight (10,000 lux) 30 minutes 6 hours 89 hours
Window sunlight on cloudy day (5,000 lux) 48 minutes 9 hours 145 hours
Indoor fluorescent lighting (500 lux) 8 hours 98 hours – – –
1 Approximate exposure each day to generate power for normal daily operation. *
2 Approximate exposure to take power up one level. *
The above times are for reference only. Actual times depend on lighting conditions. •
For details about the operating time and daily operating conditions, see the “Power Supply” section of the •
Specifications.
Power Saving
Power Saving enters a sleep state automatically whenever the watch is left for a certain period in an area
where it is dark. The table below shows how watch functions are affected by Power Saving.
There actually are two sleep state levels: “second hand sleep” and “function sleep”. •
Elapsed Time in Dark Operation
60 to 70 minutes (second hand sleep)
x Second Hand only stopped at 12 o’clock, all other functions enabled
6 or 7 days (function sleep)
All functions, including analog timekeeping, disabled •
Internal timekeeping maintained •
The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch is already in a sleep state •
when 6:00 AM arrives, however, it will remain in the sleep state.
The watch will not enter a sleep state while it is in the Stopwatch Mode. •
To recover from the sleep state
Move the watch to a well-lit area or press any button.
Radio Controlled Atomic Timekeeping
This watch receives a time calibration signal and updates its time setting accordingly. However, when using
the watch outside of areas covered by time calibration signals, you will have to adjust the settings manually as
required. See “Configuring Current Time and Date Settings Manually” for more information.
This section explains how the watch updates its time settings when the city code selected as the Home City is
in Japan, North America, Europe, or China, and is one that supports time calibration signal reception.
If your Home City Code setting is this:
The watch can receive the signal from the transmitter located
here:
LONDON (LON), PARIS (PAR), ATHENS (ATH) Anthorn (England), Mainflingen (Germany)
HONG KONG (HKG) Shangqiu City (China)
TOKYO (TYO) Fukushima (Japan), Fukuoka/Saga (Japan)
HONOLULU (HNL), ANCHORAGE (ANC),
LOS ANGELES (LAX), DENVER (DEN),
CHICAGO (CHI), NEW YORK (NYC)
Fort Collins, Colorado (United States)
Important!
The areas covered by • HONOLULU (HNL) and ANCHORAGE (ANC) are quite far from the calibration signal
transmitters, so certain conditions may cause reception problems.
When • HONOLULU (HNL) or HONG KONG (HKG) is selected as the Home City, only the time and date
are adjusted according to the time calibration signal. You need to switch manually between standard time
and daylight saving time (DST) if required. See “To toggle the Home City time between standard time and
daylight saving time” for information about how to do this.
Approximate Reception Ranges
Japanese Signal Chinese Signal
Fukushima
500 kilometers
1,000 kilometers
Fukuoka/Saga
1,500 kilometers
Changchun500 kilometers
Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong
UK and German Signals North American Signal
Anthorn
500 kilometers
1,500 kilometers
Mainflingen
The Anthorn signal is receivable
within this area.
2,000 miles
(3,000 kilometers)
600 miles
(1,000 kilometers)
Fort Collins
Even when the watch is within range of a transmitter, signal reception may be impossible due to the effects •
of geographic contours, structures, weather, the time of year, the time of day, radio interference, etc. The
signal becomes weaker at distances of approximately 500 kilometers, which means that the influence of the
above conditions becomes even greater.
Signal reception may not be possible at the distances noted below during certain times of the year or day. •
Radio interference may also cause problems with reception.
Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles) −
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers) −
Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles) −
Shangqiu (China) transmitter: 500 kilometers (310 miles) −
As of January 2009, China does not use Daylight Saving Time (DST). If China does go to the Daylight •
Saving Time system in the future, some functions of this watch may no longer operate correctly.