Manual Casio Radio Controlled WVA-M650D-2AER Watch

Manual

Operation Guide 5110

E-70

• If you are in an area where proper time calibration signal reception is impossible,

the watch keeps the time with the precision noted in “Specifi cations”.

• 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, and DST

(Daylight Saving Time) settings (page E-58).

• The Home City setting reverts to the initial default of

TYO

(Tokyo) whenever the

battery power drops to Level 5 (

CHG

) or when you have the rechargeable battery

replaced. If this happens, change the Home City to the setting you want (page

E-12).

Transmitters

The time calibration signal received by this watch depends on the currently

selected Home City (page E-12).

• 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

signals transmitted from Japan (Fukushima and Fukuoka/Saga).

• When a European time zone is selected, the watch receives the time calibration

signals transmitted from Germany (Mainfl ingen) and England (Anthorn).

E-71

• When a China time zone is selected, the watch receives the time calibration signal

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 Mainfl ingen signals), the watch fi rst tries to pick

up the signal it last received successfully. If that fails, it tries the other signal. For

the fi rst receive after you select your Home City, the watch tries the nearest signal

fi rst (Anthorn for

LIS

,

LON

, Mainfl ingen for

MAD

,

PAR

,

ROM

,

BER

,

STO

,

ATH

, and

MOW

).

Auto Return Features

• If you leave the watch with a fl ashing setting on the display for two or three minutes

without performing any operation, the watch will exit the setting mode automatically.

• The watch will return to the Timekeeping Mode automatically if you do not perform

any operation for two or three minutes in the Alarm Mode.

High-Speed Movement

• The

D

and

B

buttons are used to change the hand setting in various setting

modes. In most cases, holding down these buttons will start high-speed movement

of the applicable hand(s).

E-72

Initial Screens

When you enter the World Time Mode or Alarm Mode, the data you were viewing

when you last exited the screen will appear fi rst.

Timekeeping

• Resetting the seconds to 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 without changing the minutes.

• 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 when battery power drops to Level 5 (

CHG

) (page E-51).

• 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.

E-73

Illumination Precautions

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

• Illumination turns off automatically whenever an alarm sounds.

• Frequent use of illumination runs down the battery.

Auto light switch precautions

• The auto light switch is turned off automatically whenever battery power is at Level

4 (

CHG

) (page E-51).

• 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.

• 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 in about one second, even if you

keep the watch pointed towards your face.

More than 15 degrees

too high

E-74

• 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.

E-75

Specifi cations

Accuracy at normal temperature:

± 15 seconds a month (with no signal calibration)

Digital Timekeeping:

Hour, minutes, seconds, p.m. (PM), month, day, day of the week

Time format: 12-hour and 24-hour

Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099

Other: Home City code (can be assigned one of 48 city codes); Standard Time /

Daylight Saving Time (summer time)

Analog Timekeeping:

Hour, minutes (hand moves every 10 seconds)

Time Calibration Signal Reception:

Auto receive 6 times a day (Remaining auto

receives cancelled as soon as one is successful) (5 times a day for the

Chinese calibration signal); Manual receive

Receivable Time Calibration Signals: Mainfl ingen, Germany (Call Sign: DCF77,

Frequency: 77.5 kHz); Anthorn, England (Call Sign: MSF, Frequency: 60.0

kHz); Fort Collins, Colorado, the United States (Call Sign: WWVB,

Frequency: 60.0 kHz); Fukushima, Japan (Call Sign: JJY, Frequency: 40.0

kHz); Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60.0 kHz); Shangqiu

City, Henan Province, China (Call Sign: BPC, Frequency: 68.5 kHz)

E-76

World Time:

48 cities (29 time zones) and Coordinated Universal Time

Other: Daylight Saving Time/Standard Time; Home City/World Time City Swapping

Stopwatch:

Measuring unit: 1/100 second

Measuring capacity: 23:59' 59.99''

Measuring modes: Elapsed time, split time, two fi nishes

Countdown Timer:

Measuring unit: 1 second

Input range: 1 minute to 60 minutes (1-minute increments)

Other: Auto-repeat timing

Alarms:

Four one-time alarms; one snooze alarm; Hourly Time Signal

Illumination:

LED (light-emitting diode); Auto Light Switch (Full Auto LED Light

operates only in the dark)

Other:

Power Saving

E-77

Power Supply:

Solar panel and one rechargeable battery

Approximate battery operating time: 6 months (from full charge to Level 5

(

CHG

)) under the following conditions:

•

Watch not exposed to light

•

Internal timekeeping

•

Display on 18 hours per day, sleep state 6 hours per day

•

1 illumination operation (1.5 seconds) per day

•

10 seconds of alarm operation per day

•

4 minutes of signal reception per day

Frequent use of illumination runs down the battery. Particular care is required

when using the auto light switch (page E-73).

L-1

Rating

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