Casio 5073 User Manual

Operation Guide 5073

1

MA0905-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

Regular timekeeping

z Hour Hand
x Second Hand
c Minute Hand
v Day of the Week Hand
b Day

World Time

n World Time Hour Hand: Indicates the current time in the World Time City in

24-hour format.

m World Time Minute Hand
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 regular timekeeping, 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, Home Time, and Home Date settings. 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.

B +

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Power Levels

B +

@ *

Moves at two-second
intervals.

You can get an idea of the watch’s power level by
observing the movement of the

x Second Hand.

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.
b 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

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 regular 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 min. 2 hours 24 hours

Window sunlight (10,000 lux) 30 min. 6 hours 89 hours

Window sunlight on cloudy day
(5,000 lux)

48 min. 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.

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:

LON, PAR, ATH Anthorn (England), Mainflingen (Germany)

HKG Shangqiu City (China)

TYO Fukushima (Japan), Fukuoka/Saga (Japan)

HNL, ANC, LAX, DEN, CHI, NYC Fort Collins, Colorado (United States)

Important!

The areas covered by • HNL and ANC are quite far from the calibration signal
transmitters, so certain conditions may cause reception problems.
When • HNL or 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.

Operation Guide 5073

2

Approximate Reception Ranges

UK and German Signals

Anthorn

500 kilometers

1,500 kilometers

Mainflingen

The Anthorn signal is receivable
within this area.

North American Signal

2,000 miles
(3,000 kilometers)

600 miles
(1,000 kilometers)

Fort Collins

Japanese Signal

Fukushima

500 kilometers

1,000 kilometers

Fukuoka/Saga

Chinese Signal

1,500 kilometers

Changchun500 kilometers

Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong

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.

To get ready for a receive operation

Check to make sure the watch is in the regular timekeeping mode. If it isn’t, hold 1.
down C for about two seconds to enter the regular timekeeping mode.

The antenna of this watch is located on its 6 o’clock side. Position the watch with 2.
6 o’clock facing towards a window as shown in the nearby illustration. Make sure
there are no metal objects nearby.

6 o’clock

or

Signal reception normally is better •
at night.
The receive operation takes from •
two to seven minutes, but in some
cases it can take as long as 14
minutes. Take care that you do not
perform any button operation or
move the watch during this time.

Signal reception may be difficult or even impossible under the conditions •
described below.

Inside or
among
buildings

Inside a
vehicle

Near
household
appliances,
office
equipment,
or a mobile
phone

Near a
construction
site, airport,
or other
sources of
electrical
noise

Near
high-tension
power lines

Among
or behind
mountains

What you should do next depends on whether you are using Auto Receive or 3.
Manual Receive.

Auto Receive: Leave the watch over night in the location you selected in step 2. •
See “Auto Receive” for details.
Manual Receive: Perform the operation under “To perform manual receive”. •

Auto Receive

With Auto Receive, the watch performs the receive operation each day •
automatically up to six times (up to five times for the Chinese calibration signal)
between the hours of midnight and 5 a.m. (according to the Home City time). When
any receive operation is successful, none of the other receive operations for that
day are performed.
The receive operation is not performed if a calibration time is reached while you are •
configuring settings.

To perform manual receive

In the regular timekeeping mode, keep 1. A depressed (for about two seconds) as
the

x Second Hand goes through the following sequence.

Moves to the last signal reception result ( • Y or N), then to READY (or R for some
models).

The 2.

x Second Hand indicates the operations the watch is currently performing.

@

When the x Second
Hand is pointed here:

It means this:

READY (R) Watch is setting up for reception.

WORK (W) Reception is in progress.

YES (Y)

Reception was completed
successfully.

NO (N) Reception failed for some reason.

If signal reception is unstable, the • x Second Hand may
move between WORK (W) and READY (R).

The receive operation is complete when the 3.

x Second

Hand moves to YES (Y) or NO (N) for about five

seconds, and then resumes regular timekeeping.

When the receive operation is successful, the watch •
adjusts the time setting accordingly. It does not adjust
the setting if the operation failed.

Note

To interrupt a receive operation and return to the regular •
timekeeping, press any button.
If the •

x Second Hand is pointing to YES (Y) or NO (N),

you can return to regular timekeeping by pressing A.

To check the result of the latest receive operation

In the regular timekeeping mode, press A.

The •

x Second Hand will move to YES (Y) for five

seconds if the latest receive operation was successful,
or NO (N) if it was not. After that, regular timekeeping
will resume.

Note

The •

x Second Hand will indicate NO (N) if you have

adjusted the time or date setting manually since the
latest receive operation.
If the •

x Second Hand is pointing to YES (Y) or NO (N),

you can return to regular timekeeping by pressing A.

Radio-controlled Atomic Timekeeping Precautions

Strong electrostatic charge can result in the wrong time setting. •
Even if a receive operation is successful, certain conditions can cause the time •
setting to be off by up to one second.
The watch is designed to update the date and day of the week automatically for •
the period January 1, 2000 to December 31, 2099. Updating of the date by signal
reception will no longer be performed starting from January 1, 2100.
If you are in an area where signal reception is not possible, the watch keeps time •
with the precision noted in “Specifications”.
The receive operation is disabled under any of the following conditions. •

While power is at Level 2 or lower −
When the watch is in the function sleep state (“Power Saving”) −

Mode Reference Guide

Your watch has two timekeeping modes, and a number of setting modes. The
timekeeping mode you should select depends on what you want to do.

To do this: Enter this mode:

View the current time in your Home City and in one of 29 •
other cities around the globe

View the current date in the Home City •
Configure Home City and daylight saving time (DST) •

settings
Perform a time calibration receive operation •
Configure time and date settings manually •

Regular timekeeping mode

Select one of 29 cities (time zones) around the world and •
view the current time there.

Select daylight saving/summer time (DST) or standard time •
for a time zone

World Time setting mode

Selecting a Mode

With this watch, everything starts from the regular timekeeping mode.

To determine the watch’s current mode

Check the position of the

v Day of the Week Hand as

shown under “To select a mode”.

To return to the regular timekeeping mode from
another mode

Hold down C for about two seconds until the

x Second

Hand stops and then starts moving again.

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