Casio 3150 User Manual
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Operation Guide 3150

If you change your Home City to one that is within the same transmitter area, the current DST setting will be retained. If you change to a city that is outside your current transmitter area, DST will be turned off automatically. Transmitter area city codes

TYO, TPE, and SEL

HKG, BJS

HNL, ANC, LAX, DEN, CHI, NYC, YVR, YEA, MEX, YTO, YHZ, and YYT

LON, PAR, BER, ATH, LIS, MAD, ROM, STO, and MOW

All other city codes

4.When the setting you want is selected, press Ato exit the setting screen.

TheDST indicator appears to indicate that Daylight Saving Time is turned on.

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.

Graphic Area

The information shown in the graphic area depends on the current mode.

Graphic Area

Mode

Graphic Area

Timekeeping Mode

Timekeeping Mode seconds

 

 

Rally Mode

Target time number/Measurement

 

 

time 1/10 seconds during

 

 

measurement

 

Recall Mode

Record number

 

World Time Mode

Timekeeping Mode seconds

 

Alarm Mode

No indication

 

Stopwatch Mode

Stopwatch Mode 1/10 seconds

 

CountdownTimer

CountdownTimer Mode seconds

 

Mode

 

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 alarms, the Hourly Time Signal, the countdown alarm, and Rally Mode auto start 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 C to toggle the button operation tone on ( not displayed) and off ( displayed).

Holding down C to turn the button operation tone on or off also causes the watch’s current mode to change.

The indicator is displayed in all modes when the button operation tone is turned off.

Power Saving Function

Power saving indicator

When turned on, the Power Saving function

 

 

enters a sleep state automatically whenever the

 

 

watch is left in an area for a certain period where

 

 

it is dark. The table below shows how watch

 

 

functions are affected by the Power Saving

 

 

function.

 

Elapsed Time

 

Display

Operation

in Dark

 

 

 

60 to 70 minutes Blank, with Power Saving

All functions enabled, except

 

indicator (PS) flashing

for the display

6 or 7 days

Blank, with Power Saving

Auto receive, beeper tone,

 

indicator (PS) not flashing

illumination, and display are

 

 

 

disabled.

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 9:59 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-litarea.

Press any button.

Angle the watch towards your face for reading.

To turn Power Saving on and off

 

 

 

 

1.

In the Timekeeping Mode, hold down A until

ll l ll

llll

the city code starts to flash, which indicates

ll

l

 

 

l

 

l

l

l

the setting screen.

l

 

l

lll

l

 

l

 

2.

Press C nine times until the Power Saving

l

 

l

 

l

 

l

 

 

 

 

l

l l l

l

 

 

on/off screen appears.

 

 

 

 

On/Off status

 

3.

Press D to toggle Power Saving on ( ) and

 

 

off (

).

 

 

 

 

 

 

 

 

 

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.

Radio-controlledAtomic Timekeeping Precautions

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

The time calibration signal bounces 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 manually.

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-leapyears.

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.

If you are in an area where proper time calibration signal reception is impossible, the watch keeps time within ±15 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 Home City setting reverts to the initial default of TYO (Tokyo) whenever the battery power level drops to Level 5 or when you have the rechargeable battery replaced. If this happens, change the Home City to the setting you want.

Transmitters

The time calibration signal received by this watch depends on the currently selected Home City code.

When a U.S. time zone is selected, the watch receives the time calibration signal transmitted from the United States (Fort Collins).

When a Japanese time zone is selected, the watch receives the time calibration signal transmitted from Japan (Fukushima and Fukuoka/Saga).

When a European time zone is selected, the watch receives the time calibration signals transmitted from Germany (Mainflingen) and England (Anthorn).

When a China time zone is selected, the watch receives the time calibration signals transmitted from China (Shangqiu City).

When your Home City is LIS,LON,MAD,PAR,ROM,BER,STO,ATH,MOW (which can receive both the Anthorn and Mainflingen signals), the watch first tries to pick up the signal it last successfully received. If that fails, it tries the other signal. For the first receive after you select your Home City, the watch tries the nearest signal first (Anthorn forLIS,LON, Mainflingen forMAD,PAR,ROM,BER,STO,ATH, andMOW).

Auto Return Features

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

Scrolling

The B and D buttons are used in various modes and setting screens to scroll through data on the display. In most cases, holding down these buttons during a scroll operation scrolls at high speed.

Initial Screens

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

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 to00 without changing the minutes.

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

The watch’s built-infull 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.

The current time for all city codes in the Timekeeping Mode and World Time Mode is calculated in accordance with the Coordinated Universal Time (UTC) for each city, based on your Home City time setting.

World Time

The seconds count of the World Time is synchronized with the seconds count of the Timekeeping Mode.

Illumination Precautions

The electro-luminescentpanel 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.

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Operation Guide 3150

Auto light switch precautions

Avoid wearing the watch on the inside of your wrist. Doing so causes the auto light switch to operate when it is not needed, which shortens battery life. If you want to wear the watch on the inside of your wrist, turn off the auto light switch feature.

More than 15 degrees too high

Illumination may not turn on if the face of the watch is more than 15 degrees above or below parallel. Make sure that the back of your hand is parallel to the ground.

Illumination turns off after a preset amount of time (1.5 or 3 seconds), even if you keep the watch pointed towards your face.

Static electricity or magnetic force can interfere with proper operation of the auto light switch. If illumination does not turn on, try moving the watch back to the starting position (parallel with the ground) and then tilt it back toward you again. If this does not work, drop your arm all the way down so it hangs at your side, and then bring it back up again.

Under certain conditions, illumination may not turn on until about one second after you turn the face of the watch towards you. This does not necessarily indicate malfunction of the auto light switch.

You may notice a very faint clicking sound coming from the watch when it is shaken back and forth. This sound is caused by mechanical operation of the auto light switch, and does not indicate a problem with the watch.

UTC Differential/City Code List

City

City

UTC

Code

Differential

 

PPG

Pago Pago

–11.0

HNL

Honolulu

–10.0

ANC

Anchorage

–09.0

YVR

Vancouver

–08.0

LAX

Los Angeles

 

YEA

Edmonton

–07.0

DEN

Denver

 

MEX

Mexico City

–06.0

CHI

Chicago

 

MIA

Miami

 

YTO

Toronto

–05.0

NYC

New York

 

SCL

Santiago

–04.0

YHZ

Halifax

 

YYT

St. Johns

–03.5

RIO

Rio De Janeiro

–03.0

RAI

Praia

–01.0

UTC

 

 

LIS

Lisbon

+00.0

LON

London

 

MAD

Madrid

 

PAR

Paris

 

ROM

Rome

+01.0

BER

Berlin

 

STO

Stockholm

 

ATH

Athens

 

CAI

Cairo

+02.0

JRS

Jerusalem

 

MOW

Moscow

+03.0

JED

Jeddah

 

THR

Tehran

+03.5

DXB

Dubai

+04.0

KBL

Kabul

+04.5

KHI

Karachi

+05.0

DEL

Delhi

+05.5

DAC

Dhaka

+06.0

RGN

Yangon

+06.5

BKK

Bangkok

+07.0

SIN

Singapore

 

HKG

Hong Kong

+08.0

BJS

Beijing

 

TPE

Taipei

 

SEL

Seoul

+09.0

TYO

Tokyo

 

ADL

Adelaide

+09.5

GUM

Guam

+10.0

SYD

Sydney

 

NOU

Noumea

+11.0

WLG

Wellington

+12.0

Based on data as of March 2008.

The rules governing global times (GMT differential and UTC offset) and summer time are determined by each individual country.

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