Casio Watch Casio Gwm850-1 Watch User Manual

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Operation Guide 3155
6
Important!
• 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 rechargeable battery
power to run down. Be sure that the watch is exposed to bright light whenever
possible.
• This watch uses a special rechargeable battery to store power produced by the solar
cell, so regular battery replacement is not required. However, after very long use, the
rechargeable battery may lose its ability to achieve a full charge. If you experience
problems getting the special rechargeable battery to charge fully, contact your dealer
or CASIO distributor about having it replaced.
• Never try to remove or replace the watch’s special battery yourself. Use of the wrong
type of battery can damage the watch.
• All data stored in memory is deleted, and the current time and all other settings
return to their initial factory defaults whenever battery power drops to Level 5 and
when you have the battery replaced.
• Turn on the watch’s Power Saving function and keep it in an area normally exposed
to bright light when storing it for long periods. This helps to keep the rechargeable
battery from going dead.
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Level
1
2
3
4
5
Battery Power Indicator Function Status
All functions enabled.
All functions enabled.
Auto and manual receive,
illumination, and beeper
disabled.
Except for timekeeping and
the C (charge) indicator, all
functions and display
indicators disabled.
All functions disabled.
(Charge Soon Alert)
Battery power
indicator
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• The flashing LOW indicator at Level 3 tells you that battery power is very low, and
that exposure to bright light for charging is required as soon as possible.
• At Level 5, all functions are disabled and settings return to their initial factory
defaults. Once the battery reaches Level 2 after falling to Level 5, reconfigure the
current time, date, and other settings.
• The watch’s Home City code setting will change automatically to TYO (Tokyo)
whenever the battery drops to Level 5. With this Home City code setting, the watch is
configured to receive the time calibration signals of Japan. If you are using the watch
in North America or Europe, or China you will need to change the Home City code
setting to match your location whenever the battery drops to Level 5.
• Display indicators reappear as soon as the battery is charged from Level 5 to Level
2.
• Leaving the watch exposed to direct sunlight or some other very strong light source
can cause the battery power indicator to show a reading temporarily that is higher
than the actual battery level. The correct battery level should be indicated after a few
minutes.
• Performing illumination, or beeper operations during a
short period may cause
(recover) to appear on the
display. Illumination, alarm, countdown timer alarm, and
hourly time signal will be disabled until battery power
recovers.
After some time, battery power will recover and
(recover) will disappear, indicating that the above
functions are enabled again.
• If
(recover) appears frequently, it probably means
that remaining battery power is low. Leave the watch in
bright light to allow it to charge.
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Recover indicator
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid leaving
the watch in the areas described below whenever charging its rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid crystal
display to black out. The appearance of the LCD should become normal again when
the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery 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.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about seven months.
• The following table shows the amount of time the watch needs to be exposed to light
each day in order to generate enough power for normal daily operations.
• Since these are the specs, we can include all the technical details.
• Watch not exposed to light
• Internal timekeeping
• Display on 18 hours per day, sleep state 6 hours per day
• 1 illumination operation(1.5 second) per day
• 10 seconds of alarm operation per day
• Measurement of 26 Rally Mode stages per month
• Approximately 4 minutes of signal reception per day
• Stable operation is promoted by frequent exposure to light.
Approximate
Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
Approximate Exposure Time
Level 5 Level 4 Level 3 Level 2 Level 1
2 hours 26 hours 7 hours
6 hours 129 hours 36 hours
11 hours 263 hours 73 hours
118 hours - - - - - - - - - - - - - - - -
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a Window
(10,000 lux)
Daylight Through a Window
on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting
(500 lux)
▲
▲
▲
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
Timekeeping
Press the B button to toggle the lower display between
the day of the week and date, and the currently selected
World Time city and time (Dual Time).
Use the Timekeeping Mode to set and view the current
time and date.
Hour : Minutes
Seconds
Dual time
Month – Day
Current Time
PM
indicator
Day of
week
Dual Time
Seconds
City code
B
B
▲
▲
Read This Before You Set the Time and Date!
This watch is preset with a number of city codes, each of which represents the time
zone where that city is located. When setting the time, it is important that you first
select the correct city code for your Home City (the city where you normally use the
watch). If your location is not included in the preset city codes, select the preset city
code that is in the same time zone as your location.
• Note that all of the times for the World Time Mode city codes are displayed in
accordance with the time and date settings you configure in the Timekeeping Mode.
To set the time and date manually
1.In the Timekeeping Mode hold down A until the city
code starts to flash, which indicates the setting screen.
2.Use D and B to select the city code you want.
• Make sure you select your Home City code before
changing any other setting.
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• For full information on city codes, see the “UTC Differential/City Code List”.
3. Press C to move the flashing in the sequence shown below to select the other
setting.
Seconds
12/24-Hour
Format
Hour
Minutes
DST
Month
Ye a r
City Code
DayPower Saving
• The following steps explain how to configure timekeeping settings only.
4. When the timekeeping setting you want to change is flashing, use D or B to
change it as described below.
Screen: To do this:
Change the city code
Cycle between Auto DST (AvtA), Daylight
Saving Time (
ON) and Standard Time
(OFF).
Toggle between 12-hour (
) and 24-
hour ( ) timekeeping
Reset the seconds to
Toggle the display illumination duration
between 1.5 and 3 seconds
Change the hour and minutes
Change the year, month, or day
Toggle between Power Saving on ( ) and
off (
)
Do this:
Use D (east) and B
(west).
Press D.
Press D.
Press D.
Press B.
Use D (+) and B (–).
Press D.
5. Press A to exit the setting screen.
• Auto DST (
AvtA) can be selected only while LIS, LON, MAD, PAR, ROM,
BER, STO, ATH, MOW, TPE, SEL, TYO, HNL, ANC, YVR, LAX, YEA,
DEN, MEX, CHI, MIA, YTO, NYC, YHZ, or YYT is selected as the Home
City code. For more information, see “Daylight Saving Time (DST)” below.
• The day of the week is displayed automatically in accordance with the date (year,
month, and day) settings.
12-hour and 24-hour timekeeping
• With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for
times in the range of noon to 11:59 p.m. and no indicator appears to the left of the
hour digits for times in the range of midnight to 11:59 a.m.
• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without
any indicator.
• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is
applied in all other modes.

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