Casio Operation Guide 4722 User Manual download pdf (Page 4)

Operation Guide 4722

Illumination

An LED (light-emitting diode) illuminate the face of the

watch for easy reading in the dark. The watch’s auto light

switch illuminates the face automatically when you angle

the watch towards your face.

• The auto light switch must be turned on for it to operate.

• See “Illumination Precautions” for other important

information.

To illuminate the face of the watch

In Timekeeping mode (except when a setting screen is on

the display), press B to illuminate the face of the watch.

• The above operation turns on illumination regardless of

the current auto light switch setting.

About the Auto Light Switch

Turning on the auto light switch causes the face to illuminate, whenever you position

your wrist as described below in any mode. Note that this watch features an “Auto LED

Light,” so the auto light switch operates only when available light is below a certain

level. It does not illuminate the face under bright light.

Moving the watch to a position that is parallel to the ground and then tilting it

towards you at more than 40 degrees causes illumination to turn on.

• Wear the watch on the outside of your wrist.

Parallel to

ground

More than

40°

Warning!

• Always make sure you are in a safe place whenever you are reading the face

of watch using the auto light switch. Be especially careful when running or

engaged in any other activity that can result in accident or injury. Also take

care that sudden illumination by the auto light switch does not startle or

distract others around you.

• When you are wearing the watch, make sure that its auto light switch is turned

off before riding on a bicycle, or operating a motorcycle or any other motor

vehicle. Sudden and unintended operation of the auto light switch can create a

distraction, which can result in a traffic accident and serious personal injury.

To turn the auto light switch on and off

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

for about three seconds to toggle the auto light switch on and off.

• Turning on the auto light switch will cause the watch to beep. The “ON” indicator will

appear and the light will turn on for 1.5 seconds.

• Turning off the auto light switch will cause the watch to beep. The “OFF” indicator will

appear for 1.5 seconds. The light will not turn on.

• In order to protect against running down the battery, the auto light switch

automatically turns off approximately six hours after you turn it 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.

Auto Return Features

• If you leave the watch in the Alarm, or Hand Setting Mode for two or three minutes

without performing any operation, it returns to the Timekeeping Mode automatically.

• If you do not perform any operation for about two or three minutes while a setting

mode is selected, the watch will exit the setting mode automatically.

Scrolling

• B is used to change the hand setting in various setting modes. In most cases,

holding down this button will start high-speed movement of the applicable hand(s).

• High-speed movement of hands will continue until you press any button, or until the

moving hand(s) finishes one complete cycle.

- One complete cycle for the hands is one revolution (360 degrees) or 24 hours.

Radio-controlled Atomic 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, 2001 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.

• 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 time zone, and DST

(summer time).

Timekeeping

• The year can be set in the range of 2001 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.

• The date will change automatically when the current time reaches midnight. The

date change at the end of the month may take more time than normal.

• The current time for all time zones in the Timekeeping Mode and Dual Time Mode is

calculated in accordance with the Greenwich Mean Time (GMT) differential of each

zone, based on your Home Time Zone time setting.

• GMT differential is calculated by this watch based on Universal Time Coordinated

(UTC*) data.

* UTC 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. The reference point for UTC is Greenwich,

England.

Illumination Precautions

• The illumination provided by the light may be hard to see when viewed under direct

sunlight.

• Illumination automatically turns off whenever an alarm sounds.

• Frequent use of illumination shortens the battery operating time.

Auto light switch precautions

• Wearing the watch on the inside of your wrist, movement of your arm, or vibration of

your arm can cause frequent activation of the auto light switch and illuminate the

face of the watch. To avoid running down the battery, turn off the auto light switch

whenever engaging in activities that might cause frequent illumination of the face.

• Note that wearing the watch under your sleeve while the auto light switch is turned

on can cause frequent illumination of the face and can run down the battery.

• 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 about 1.5 seconds, even if you

keep the watch pointed towards your face.

More than 15 degrees

too high

• 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 towards your face 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.

Tachymeter

If your watch has a tachymeter bezel, you can perform the

steps below to calculate average speed after using the

Stopwatch Mode to measure the amount of time that it

takes to travel one kilometer (or one mile).

• Never try to perform stopwatch operations while you

are driving an automobile, riding a bicycle, or

operating any type of vehicle. Doing so is very

dangerous and can result in accident.

1 In the Stopwatch Mode, start an elapsed time

operation at any point you like.

2 Stop the elapsed time operation after you travel one

kilometer or one mile.

3 Your average speed will be the value that the second

hand is pointing to on the tachymeter bezel.

• The illustration shows an example where it took 50 seconds to travel one kilometer

by car. The second hand is pointing at 70, which indicates that the average speed is

70 kilometers per hour.

Tachymeter bezel

200

120

100

• See “Stopwatch” for details about using the stopwatch.

• The tachymeter can be used only when you are traveling by car or some other

means that can cover one kilometer or one mile within 60 seconds.

GMT Differential Value

Major Cities in Time Zone

Standard Time

DST/Summer Time

Time Zone Table

–11.0

–10.0

–9.0

–8.0

–7.0

–6.0

–5.0

–4.0

–3.0

–2.0

–1.0

DST –10.0

DST –9.0

DST –8.0

DST –7.0

DST –6.0

DST –5.0

DST –4.0

DST –3.0

DST –2.0

DST –1.0

DST +0.0

Pago Pago

Honolulu, Papeete

Anchorage, Nome

Los Angeles, San Francisco, Las Vegas, Vancouver,

Seattle/Tacoma, Dawson City, Tijuana

Denver, El Paso, Edmonton, Culiacan

Chicago, Houston, Dallas/Fort Worth, New Orleans,

Mexico City, Winnipeg

New York, Montreal, Detroit, Miami, Boston,

Panama City, Havana, Lima, Bogota

Caracas, La Paz, Santiago, Port of Spain

Rio De Janeiro, Sao Paulo, Buenos Aires, Brasilia,

Montevideo

Praia

G 0.0

+0.0

+1.0

+2.0

+3.0

+3.5

+4.0

+4.5

+5.0

+5.5

+6.0

+6.5

+7.0

G 0.0

DST +1.0

DST +2.0

DST +3.0

DST +4.0

DST +4.5

DST +5.0

DST +5.5

DST +6.0

DST +6.5

DST +7.0

DST +7.5

DST +8.0

(GMT)

London, Dublin, Lisbon, Casablanca, Dakar, Abidjan

Paris, Milan, Rome, Madrid, Amsterdam, Algiers,

Hamburg, Frankfurt, Vienna, Stockholm, Berlin

Cairo, Jerusalem, Athens, Helsinki, Istanbul, Beirut,

Damascus, Cape Town

Jeddah, Kuwait, Riyadh, Aden, Addis Ababa, Nairobi,

Moscow

Tehran, Shiraz

Dubai, Abu Dhabi, Muscat

Kabul

Karachi, Male

Delhi, Mumbai, Kolkata

Dhaka, Colombo

Yangon

Bangkok, Jakarta, Phnom Penh, Hanoi, Vientiane

+8.0

+9.0

+9.5

+10.0

+11.0

+12.0

DST +9.0

DST +10.0

DST +10.5

DST +11.0

DST +12.0

DST +13.0

Hong Kong, Singapore, Kuala Lumpur, Beijing, Taipei,

Manila, Perth, Ulaanbaatar

Tokyo, Seoul, Pyongyang

Adelaide, Darwin

Sydney, Melbourne, Guam, Rabaul

Noumea, Port Vila

Wellington, Christchurch, Nadi, Nauru Island

• Based on data as of December 2005.

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