Casio QW-2973 Specifications download pdf (Page 3)

Operation Guide 5410

E-23

Warning!

Leaving the watch in bright light for charging can cause it to become quite hot. Take care when

handling the watch to avoid burn injury. The watch can become particularly hot when exposed to

the following conditions for long periods.

x On the dashboard of a car parked in direct sunlight

x Too close to an incandescent lamp

x Under direct sunlight

Important!

x Keep the watch in an area normally exposed to bright light when storing it for long periods. This helps

to ensure that power does not run down.

x Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is

blocked from exposure to light can cause power to run down. Make sure that the watch is exposed to

bright light whenever possible.

E-22

Charging the Watch

The face of the watch is a solar panel that generates power from light. The generated power charges a

built-in rechargeable battery, which powers watch operations. The watch charges whenever it is exposed

to light.

Important!

x This watch uses a special secondary battery.

− Charging will not be possible if the watch’s temperature is outside the approximate range of

approximately –10°C to 60°C (14°F to 140°F).

− Over-discharge will occur if the watch is not charged within approximately three months after it stops

operation due to low battery power. Charging may not be possible after over-discharge occurs. See

“Power Levels” (page E-24).

Charging Guide

Whenever you are not

wearing the watch, be sure

to leave it in a location where

it is exposed to light.

x Best charging

performance is achieved

by exposing the watch to

light that is as strong as

possible.

When wearing the watch, make

sure that its face is not blocked

from light by the sleeve of your

clothing.

x The watch may enter a sleep

state (page E-27) if its face is

blocked by your sleeve even

only partially.

E-21

Note

x If the time and/or date setting is not correct even after you try performing the operations below, use

button and crown operations to conﬁ

gure time and date settings manually (page E-63).

− Change to another location and try performing a GPS signal and/or time calibration signal receive

operation again.

− Adjust the hand and day indicator home positions.

x Even in the above case, it is recommended that you move to a location that is appropriate for GPS

signal reception and perform a position information receive operation to conﬁ

gure time and date

settings.

x Even if you are unable to perform a GPS signal and/or time calibration signal receive operation for

some reason, the watch will keep time with average monthly accuracy of ±15 seconds.

E-20

If the time and date settings are incorrect

If the watch’s time and date settings are not correct after you ﬁ nish performing the procedure above, it

could mean that the watch’s hands and/or date indicator positions are out of alignment. If this happens,

perform the home position adjustment procedure (page E-67).

x Note that an internal decoding process the watch performs after it receives a signal may cause the

time setting to be slightly off (by less than one second). Performing the home position adjustment

procedure does not correct this condition.

If time and date settings still are not correct, try performing the steps below.

Conﬁ

gure the Home City (Time Zone) setting (page E-59) and the summer time setting (page E-60).

Use one of the procedures below.

x Perform the GPS signal time information receive operation to conﬁ gure time settings (page E-34).

x Perform the time calibration signal auto receive operation to conﬁ gure time settings (page E-36).

x Perform the GPS signal auto receive operation (page E-32).

Refer to the “City/Time Zone Indicators and Time Offset Table” (page L-3) to select your Home City

(Time Zone).

Important!

x A time calibration signal can be received in speciﬁ c geographic areas only. See “Time Calibration

Signal Reception Ranges and Conditions” (page E-37).

E-19

Conﬁ guring Time and Date Settings

Perform the procedures in this section when the time and date settings of your watch are not correct.

Important!

x Before using the watch, check its current charge level and charge it if necessary. See “Checking the

Charge Level” (page E-17).

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

(page E-42).

Perform the GPS position information acquisition operation (page E-30).

You can use the watch as described under

“If you normally plan to use the watch in one

time zone” (page E-11).

Move to a location that is appropriate for

signal reception (page E-29).

Information acquisition successful Information acquisition failed

Perform the GPS position information

acquisition operation again.

E-18

Function Limitations Due to Temperature

The functions listed below become disabled whenever the temperature of the watch is outside the

approximate range of –10ºC to 60ºC (14°F to 140°F).

− GPS signal and/or time calibration signal reception

− Operation tones, and count down timer and alarm tones

− Illumination

− Hand and Day home position correction

E-17

Checking the Charge Level

Check the charge level by observing the

Second Hand position immediately after entering the

Timekeeping mode.

See “Mode Reference Guide” (page E-42).

12 o’clock 2 o’clock 4 o’clock 6 o’clock

The watch is charged.

Power is low. Charge the watch by placing it in a

location where it is exposed to light.

The conditions below indicate low battery power. Expose the watch to light to charge.

− Second hand jumping at two-second or ﬁ ve-second increments

See “Charging the Watch” (page E-22) and “Power Levels” (page E-24).

Important!

x Even if the

Second Hand is in the 12 o’clock (0-second) or 2 o’clock (10-second) position, it is

recommended that you normally keep it exposed to light.

E-16

To start HS2 high-speed movement

While HS1 high-speed movement is in progress, rotate the crown rapidly three

turns again in the same direction as the current HS1 movement (away from you

for forward movement).

To stop high-speed movement

Rotate the crown in the direction that is opposite that of the current high-speed

movement or press any button.

Note

x You can use HS1 high-speed movement to perform the operations below.

Timer start time setting, alarm time setting, manual time setting, hand home position adjustment

x You can use HS2 high-speed movement to perform the operations below.

Timer start time setting, alarm time setting, manual time setting

1 2 3 4 5 6 7 8 9 10 11

Operation Guide 5410 1

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Casio QW-2973 Specifications Page 3

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