Casio QW-2973 Specifications download pdf (Page 4)

Operation Guide 5410

E-31

x When position information starts to be acquired from the GPS signal, the

Mode Hand will start

to move in a semi-circular pattern a number of times. If the acquisition operation is successful, the

Mode Hand will stop at 12 o’clock and then the approximate latitude will appear on the display.

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x Acquisition normally takes anywhere from about 30 seconds to two minutes. It can take as long as

13 minutes when leap second information is included. See “Leap Seconds” (page E-35).

x If the acquisition operation is successful, the

Second Hand will point to Y (YES) and then the time

and date settings will be adjusted automatically to local time.

x You can perform an operation on the watch to check the currently set Home City (Time Zone) and

the approximate latitude of the location where signal receive was performed. See “To check receive

operation results (acquisition results)” (page E-40).

x If the acquisition operation fails, the

Second Hand will move to N (NO) and then normal

timekeeping will resume with settings unchanged.

E-30

− Indoors (Reception may be possible near a window.)

− Near wireless communication equipment or other devices that generate magnetism

Adjusting Time Settings Immediately After Purchasing the Watch or While Traveling

Acquiring GPS Position Information

When position information is acquired, the watch automatically conﬁ gures the Home City (Time Zone)

setting accordingly. The time and date settings are also changed to correspond with the Home City (Time

Zone).

x This operation requires large amounts of power. Perform it only when necessary.

Perform this operation in the Timekeeping Mode (not in the Airplane Mode). See “Mode Reference Guide”

(page E-42).

1. Move to a location appropriate for signal reception and orient the watch so its display is pointed straight

up at the sky. See “Appropriate Signal Reception Location (GPS Signal)” (page E-29).

2. Hold down B for at least three seconds until the

Second Hand moves

to T+P.

x The position information acquisition operation starts when the

Second

Hand moves to T+P. Even if the

Second Hand is pointed at Y (YES), N

(NO), or T (TIME), keep B depressed until it moves to T+P.





E-29

Timekeeping (by GPS Signal)

Appropriate Signal Reception Location (GPS Signal)

Outdoors where the sky is visible and not blocked by buildings, trees, or other objects, orient the watch so

its face is pointed straight up at the sky.

Note

x If you experience signal reception problems,

keep the watch still and point its display straight

up at the sky.

x While a receive operation is being performed,

take care to avoid covering the watch face with

your sleeve.

See “GPS Signal Auto Receive” (page E-32).

x You may experience GPS signal reception problems in the areas described below.

− Where the view of the sky above is narrow

− Near trees or buildings

− Near a train station, airport, or other congested areas

x GPS signal reception is not possible in the areas described below.

− Where the sky is not visible

− Underground or in a tunnel

E-28

Automatic Timekeeping (by GPS Signal and Time Calibration Signal)

Time and date settings can be conﬁ gured automatically by performing a GPS signal or time calibration

signal receive operation.

Important!

x Before trying to receive GPS signal time information and/or a time calibration signal, ﬁ rst use GPS to

acquire GPS position information and conﬁ gure Home Time (time zone) settings.

See “Acquiring GPS Position Information” (page E-30).

Daily watch operations depend on the geographical area where it is being used.

Areas that Support Time Calibration Signal Reception

A time calibration signal receive operation is performed between midnight and 5:00 a.m., and the time

and date settings are adjusted automatically. If a time calibration signal reception is not possible for some

reason, a GPS signal receive operation is performed between 6:00 a.m. and 10:00 p.m., and the time and

date settings are adjusted automatically.

Areas that Do Not Support Time Calibration Signal Reception

When a GPS signal receive operation is successful between 6:00 a.m. and 10:00 p.m., the time and date

settings are adjusted automatically.

You can also use a button operation to trigger a GPS signal auto receive operation any time during the

day, even if you are in an area where a time calibration signal is not receivable. See “Receiving GPS Time

Information” (page E-34).

E-27

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.

x There actually are two sleep state levels: Level 1 and Level 2.

Elapsed Time in Dark Hands and Display Operation

60 to 70 minutes (Level 1) Second hand stopped. Other functions enabled.

6 or 7 days (Level 2)

All hands stopped at 12 o’clock.

x Date indicator moving.

x Alarm and timer beeper disabled.

Except for timekeeping, all functions

disabled.

x 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.

x The watch can enter a sleep state from the Timekeeping Mode only.

To recover from the sleep state

Move the watch to a well-lit area or press any button.

E-26

Charging Times

Exposure Level (Brightness)

Daily

Operation *1

Level Change *2

Level 3 Level 2 Level 1

Outdoor sunlight (50,000 lux) 8 minutes 8 hours 27 hours

Window sunlight (10,000 lux) 30 minutes 26 hours 102 hours

Window sunlight on cloudy day (5,000 lux) 48 minutes 41 hours 165 hours

Indoor ﬂ uorescent lighting (500 lux) 8 hours 450 hours – – –

* 1 Approximate exposure each day to generate power for normal daily operation.

* 2 Approximate exposure to take power up one level.

x The above times are for reference only. Actual times depend on lighting conditions.

x For details about the operating time and daily operating conditions, see the “Power Supply” section of

the Speciﬁ

cations (page E-78).

E-25

You should charge the watch whenever the

Second Hand starts to jump at one-second intervals.

Important!

x If the

Second Hand moves to 12 o’clock and stops there for some time after the watch is continuously

exposed to light, it could mean that charging is not possible due to over-discharge. Contact your

retailer and request replacement of the secondary battery.

Time Until Watch Operation Stops

Following a full charge, with no more charging: Approximately seven months

Starting from an insufﬁ cient charge: Approximately 20 days

Power Recovery Mode

The watch is designed to go into a power recovery mode that stops hand operation temporarily whenever

power suddenly drops below a certain level due to continuous signal reception, or overuse of the alarm

tone over a short period or other operations over a short period. Note that all operations are disabled

while the watch is in the power recovery mode.

The hands will move to the correct positions and the watch will resume normal operation after power

recovers (in about 15 minutes). Putting the watch in a location where it is exposed to light will help power

to recover sooner.

E-24

Power Levels

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

the

Second Hand.

x If the

Second Hand is moving normally at one-second intervals, power is

at Level 1.

x Low power level is indicated when the

Second Hand is moving at two-

second intervals (Level 2) or ﬁ ve-second intervals (Level 3) (Low battery

alert). Expose the watch to light as soon as possible so it can charge.

Level Hand Movement Function Status

1 Normal. All functions enabled

Second Hand moves at

two-second intervals.

When power drops further, the

Second Hand moves at ﬁ ve-

second intervals.

Beeper, time calibration signal

reception, countdown timer

operation, and home position

adjustment disabled

All hands stopped at 12 o’clock.

Day Indicator shows 1.

All functions disabled

x When power drops to Level 3, all settings (including timekeeping) will be cleared. Recharging the

battery will reset all settings to their initial factory defaults, so you will need to conﬁ gure settings again.

x When the watch is at Level 3, exposing it to light for a while will cause the 1

Second Hand to move to

the position of second 57. This indicates that charging has started.

Moves at two-second

intervals.

1 2 3 4 5 6 7 8 9 10 11

Operation Guide 5410 1

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Casio QW-2973 Specifications Page 4

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