Casio 3023 Operation Manual Download Page 5

Operation Guide 3023

5

Reference

This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.

Button Operation Tone

The button operation tone sounds any time you press one
of the watch’s buttons. You can turn the button operation
tone on or off as desired.

Even if you turn off the button operation tone, the alarm,
Hourly Time Signal, and Countdown Timer Mode alarm
all operate normally.

To turn the button operation tone on and off

In any mode (except when a setting screen is on the
display), hold down 

B

 to toggle the button operation tone

on (

MUTE

 not displayed) and off (

MUTE

 displayed).

MUTE indicator

Holding down 

B

 to turn the button operation tone on or off also causes the watch’s

current mode to change.

The 

MUTE

 indicator is displayed in all modes when the button operation tone is

turned off.

Power Saving Function

When turned on, the Power Saving function enters a sleep
state automatically whenever the watch is left in an area
where it is dark for a certain period. The table below
shows how watch functions are affected by the Power
Saving function.

Power saving indicator

Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.

The watch will not enter the sleep state between 6:00 AM and 10:59 PM. If the
watch is already in the sleep state when 6:00 AM arrives, however, it will remain in
the sleep state.

To recover from the sleep state

Perform any one of the following operations.

Move the watch to a well-lit area.

Press any button.

Elapsed Time

in Dark

60 to 70 minutes

6 or 7 days

Display

Blank, with Sleep indicator (

PS

)

flashing

Blank, with Sleep indicator (

PS

)

not flashing

Operation

All functions enabled, except
for the display

Beeper tone, illumination, and
display are disabled.

To turn Power Saving on and off

1. In the Timekeeping Mode, hold down 

A

 until the city

code starts to flash, which indicates the setting screen.

2. Press 

B

 nine times until the Power Saving on/off

screen appears.

3. Press 

C

 to toggle Power Saving on (

ON

) and off (

OF

).

4. Press 

A

 to exit the setting screen.

The Power Saving indicator (

PS

) is on the display in all

modes while Power Saving is turned on.

Auto Return Features

If you leave the watch in the Alarm Mode for two or three minutes without performing
any operation, it returns to the Timekeeping Mode automatically.

If you leave the watch with a flashing setting on the display for two or three minutes
without performing any operation, the watch exits the setting screen automatically.

On/Off status

Scrolling

The 

C

 and 

L

 buttons are used in various modes and setting screens to scroll

through data. In most cases, holding down these buttons during a scroll operation
scrolls through the data at high speed.

Initial Screens

When you enter the World Time or Alarm Mode, the data you were viewing when you
last exited the mode appears first.

Radio-controlled Atomic Timekeeping Precautions

Strong electrostatic charge can result in the wrong time being set.

The time calibration signal is bounced off the ionosphere. Because of this, such
factors as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.

Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.

The current time setting in accordance with the time calibration signal takes priority
over any time settings you make.

The watch is designed to update the date and day of the week automatically for the
period January 1, 2000 to December 31, 2099. Setting of the date by the time
calibration signal cannot be performed starting from January 1, 2100.

This watch can receive signals that differentiate between leap years and non-leap
years.

Though this watch is designed to receive both time data (hour, minutes, seconds)
and date data (year, month, day), certain signal conditions can limit reception to time
data only.

Normally, the signal reception date shown by the Last Signal screen is the date data
included in the received time calibration signal. When only time data is received,
however, the Last Signal screen shows the date as kept in the Timekeeping Mode at
the time of signal reception.

If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±20 seconds a month at normal temperature.

If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your current city code, DST (summer
time), and auto receive settings. The following are the initial factory defaults for these
settings.

Setting

City code
DST (summer time)

Auto receive

Initial Factory Default

NYC

 (New York)

 (Auto switching)

ON

 (Auto receive)

Timekeeping

Resetting the seconds to 

00

 

while the current count is in the range of 30 to 59

causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 

00

 

without changing the minutes.

The day of the week is displayed automatically in accordance with the date (year,
month, and day) settings.

The year can be set in the range of 2000 to 2099.

The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced or when battery power drops to
Level 5.

The times for the Timekeeping Mode and all the city codes of the World Time Mode
are calculated in accordance with each city’s UTC differential.

The UTC differential is a value that indicates the time difference between a
reference point in Greenwich, England and the time zone where a city is located.

 The letters “UTC” is the abbreviation for “Universal Time Coordinated”, which is the

world-wide scientific standard of timekeeping. It is based upon carefully maintained
atomic (cesium) clocks that keep time accurately to within microseconds. Leap
seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s
rotation.

12-hour/24-hour Timekeeping  Formats

The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also
applied in all other modes.

With the 12-hour format, the PM indicator (

P

) appears on the display for times in the

range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.

With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.

Illumination Precautions

The electro-luminescent panel that provides illumination loses power after very long
use.

Illumination may be hard to see when viewed under direct sunlight.

The watch may emit an audible sound whenever the display is illuminated. This is
due to vibration of the EL panel used for illumination, and does not indicate
malfunction.

Illumination turns off automatically whenever an alarm sounds.

Frequent use of illumination runs down the battery.

Pago Pago

Honolulu

Anchorage

Vancouver

Los Angeles

Edmonton

Denver

Mexico City

Winnipeg

Chicago

Miami

Toronto

New York

Caracas

Halifax

St. Johns

Rio De Janeiro

Praia

City

City

UTC

Other major cities in same time zone

Code

Differential

City Code Table

PPG
HNL
ANC
YVR

LAX
YEA

DEN
MEX

YWG

CHI
MIA

YTO
NYC
CCS
YHZ
YYT

RIO
RAI

–11.0
–10.0
–09.0

–08.0

–07.0

–06.0

–05.0

–04.0

–03.5
–03.0
–01.0

Papeete
Nome
San Francisco, Las Vegas,
Seattle/Tacoma, Dawson City, Tijuana

El Paso, Culiacan

Houston, Dallas/Fort Worth, New Orleans

Montreal, Detroit, Boston,
Panama City, Havana, Lima, Bogota

La Paz, Santiago, Port Of Spain

Sao Paulo, Buenos Aires, Brasilia, Montevideo

Lisbon

London

Barcelona

Madrid

Paris
Milan

Rome
Berlin

Stockholm

Athens

Cairo

Jerusalem

Moscow

Jeddah

Tehran

Dubai
Kabul

Karachi

Delhi

+00.0

+01.0

+02.0

+03.0

+03.5
+04.0
+04.5
+05.0
+05.5

Dublin, Casablanca, Dakar, Abidjan

Amsterdam, Algiers, Hamburg, Frankfurt, Vienna

Helsinki, Istanbul, Beirut, Damascus,
Cape Town

Kuwait, Riyadh, Aden, Addis Ababa, Nairobi

Shiraz
Abu Dhabi, Muscat

Male
Mumbai, Kolkata

LIS

LON
BCN

MAD

PAR

MIL

ROM

BER
STO

ATH

CAI

JRS

MOW

JED

THR
DXB

KBL

KHI

DEL

Dhaka

Yangon

Bangkok

Hong Kong

Seoul
Tokyo

Adelaide

Guam

Sydney

Noumea

Wellington

+06.0
+06.5
+07.0

+08.0

+09.0

+09.5

+10.0

+11.0
+12.0

Colombo

Jakarta, Phnom Penh, Hanoi, Vientiane
Singapore, Kuala Lumpur, Beijing, Taipei, Manila, Perth,
Ulaanbaatar

Pyongyang

Darwin

Melbourne, Rabaul

Port Vila
Christchurch, Nadi, Nauru Island

DAC

RGN

BKK

HKG

SEL
TYO
ADL

GUM

SYD

NOU
WLG

Based on data as of June 2005.

Summary of Contents for 3023

Page 1: ...pdates its time setting accordingly The time calibration signal includes both Standard Time and Daylight Saving Time summer time data This watch is designed to pick up the time calibration signal transmitted from Fort Collins Colorado USA Reception is possible within North America The term North America in this User s Guide refers to the area that consists of Canada the continental United States a...

Page 2: ...ation and return to the Timekeeping Mode press C If the receive operation is unsuccessful the message ERR appears on the display for about one or two minutes After that the watch returns to the Timekeeping Mode You can also change from the Last Signal or ERR screen to the normal timekeeping screen by pressing C To turn auto receive on and off 1 In the Timekeeping Mode press C to display the Last S...

Page 3: ... should position the watch for charging Example Orient the watch so its face is pointing at a light source The illustration shows how to position a watch with a resin band Note that charging efficiency drops when any part of the solar cell is blocked by clothing etc You should try to keep the watch outside of your sleeve as much as possible Charging is reduced significantly if the face is covered ...

Page 4: ...keeping Do this Use C east and L west Press C Press C 3 When the setting you want to change is flashing use C and or L to change it as described below Reset the seconds to 00 Toggle the illumination duration setting between 1 5 seconds and 2 5 seconds Change the hour minutes or year Change the month or day Toggle Power Saving on and off Show or hide indicated by the date day of the week on the mai...

Page 5: ...l screen is the date data included in the received time calibration signal When only time data is received however the Last Signal screen shows the date as kept in the Timekeeping Mode at the time of signal reception If you are in an area where proper time calibration signal reception is impossible the watch keeps time within 20 seconds a month at normal temperature If you have problems with prope...

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