User’s Guide 5531 (MRG)
E-15
◆Receiving GPS Time Information
Perform this operation when you suspect that the time normally indicated by the watch is not correct.
xIf the GPS signal time information receive operation is successful, the watch will automatically adjust
the current time and day settings of the Home City (time zone).
Important!
xPerform this operation in the Timekeeping Mode (not in the Airplane Mode). See “Mode Reference
Guide” (page E-10).
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-13).
2. Hold down Buntil the second hand moves to T (TIME). Release
Bafter the second hand reaches T (TIME). This will start time info
reception.
xReception normally takes anywhere from six seconds to 60seconds.
It can take as long as 13 minutes.
xWhen the receive operation is successful, the watch will adjust its
current time and day settings automatically.
xThis operation requires large amounts of power. Perform it only
when necessary.
30
Second hand
E-14
Performing a GPS Signal Receive Operation Manually
◆Acquiring GPS Position Information
When position information is acquired successfully, the watch is able to determine its current location
and adjust its time and day setting accordingly.
Important!
xPerform this operation in the Timekeeping Mode (not in the Airplane Mode). See “Mode Reference
Guide” (page E-10).
1. Move to a location appropriate for signal reception and orient the watch so its face is pointing straight
upwards.
xSee “Appropriate Signal Reception Location (GPS Signal)” (page E-13).
2. Hold down Buntil the second hand moves to T (TIME). Release
Bafter the second hand reaches T (TIME). Pressing Bagain will
cause the second hand to move to T+P and start location information
acquisition.
xPosition information reception takes anywhere from about
30seconds to 80 seconds. It can take as long as 13 minutes.
xSuccessful acquisition of position information will automatically
display the time and day for the resulting location.
xPosition information acquisition requires large amounts of power.
Perform the acquisition operation only when it is required.
30
Second hand
E-13
Timekeeping (Based on GPS Signals)
Appropriate Signal Reception Location (GPS Signal)
When performing GPS signal reception, move the watch outside where there is a clear view of the sky
above, with no obstructing buildings, trees, or other objects.
Note
xIf you experience signal reception problems, keep the
watch still and point its display straight up at the sky.
xWhile a receive operation is being performed, take care
to avoid covering the watch face with your sleeve.
xYou 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
xGPS signal reception is not possible in the areas described below.
-Where the sky is not visible
-Underground or in a tunnel
-Indoors (Reception may be possible near a window.)
-Near wireless communication equipment or other devices that generate magnetism
E-12
Using the Watch in an Aircraft (Airplane Mode)
xSwitch to the Airplane Mode whenever you are on an aircraft, or in any other location where signal
reception or connection with a phone is limited.
xEntering the Airplane Mode disables GPS signal and time calibration signal reception, and connection
with a phone.
xBefore using the crown, be sure to first read the “Crown Operations and Configuring Settings” (page E-19).
xWhile in the Timekeeping Mode, press Bonce and then pull out the crown to the first click. The
second hand will move to Y (YES) (receive enabled) or N (NO) (receive disabled). To enter the Airplane
Mode (receive disabled), rotate the crown to align the second hand with N (NO). To exit the Airplane
Mode (receive enabled), align the second hand with Y (YES). After the setting is the way you want,
push the crown back in to its normal position.
30
E-11
C
xUse Cto navigate between modes.
xHolding down Cfor one second in any mode returns to the Timekeeping Mode.
xHold down Cfor about 2.5 seconds to establish a Bluetooth connection with a phone. For details,
refer to the Operation Guide available at the CASIO website.
Stopwatch Mode Countdown Timer
Mode Alarm Mode
30
Seconds
Hours
Hours (0 to 24)
Minutes
Crown
Mode
xStart
xStop
xReset
C
30
Seconds
Hours
Hours (0 to 24)
Minutes
Crown
Mode
xStart
xStop
xReset
C
xAlarm ON/
OFF
30
Hours
Hours (0 to 24)
Minutes
Crown
Mode
xIllumination
E-10
Mode Reference Guide
xOperation details: Operation Guide available at the CASIO website.
Timekeeping Mode
C
xIn the Timekeeping Mode (not in the Airplane Mode), the day of the week hand will point to
the current day of the week.
xIn the Airplane Mode, the day of the week hand points to the airplane ( ) mark instead of the
day of the week.
30
Hour hand
Second hand
CB
A
Day of the
week hand
World Time hour (24-hour dial)
World Time hour hand
World Time minute hand
World Time City
Crown
Day Indicator
Minute hand
24-hour hand
Abutton
xPressing Aturns on the illumination.
xHold down for about three seconds to
swap your World Time with your current
location time.
Bbutton
xPress once to check the last receive
result, and then the Home City and
latitude will be indicated.
xHold down for about 1.5 seconds to
start time information acquisition from
the GPS. Press again while reception
is in progress to acquire location
information from the GPS.
E-9
xEven 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.
Important!
xIf the current time and day setting is wrong after you perform one of the procedures under “Time
Calibration Signal Auto Receive”, “GPS Signal Auto Receive”, or “Receiving GPS Time Information”, try
acquiring position information (GPS) and then perform the time/day setting procedure again.
xIf you feel that the current time and/or day indicator are not in the correct positions, you can adjust
their alignment. For details, see the Operation Guide available at the CASIO website.
xTime calibration signal reception is normally possible in the areas below.
Japan, China, North America, Europe
For details, see the Operation Guide available at the CASIO website.
xFor details about the following operations, see the Operation Guide available at the CASIO website:
Configuring Home City (time zone), summer time, current time, and current day settings manually.
http://world.casio.com/manual/wat/
GPS signal
Time calibration signal
E-8
Timekeeping (Current Time and Day Adjustment)
● For information about how to adjust time using a phone, refer to the Operation Guide available
at the website below.
http://world.casio.com/manual/wat/
● After purchasing the watch, perform the procedure under “Acquiring GPS Position Information”
(page E-14).
● To set the current time and day, normally use the procedure under “Time Calibration Signal Auto
Receive” (page E-18). In areas where a time calibration signal cannot be received for some reason,
set the current time and day using the procedure under “GPS Signal Auto Receive” (page E-16).
xLate night (between midnight and 5:00 a.m.): The receive operation starts at regular intervals until
receive is successful (Time Calibration signal).
xDaytime (between 6:00 a.m. and 10:00 p.m.): The receive operation will start automatically when
the watch is continually expose to light (GPS).
xOnce a time calibration or GPS signal receive operation is successful, no more Auto Receive
operations are performed that day.
●● If the current time setting is not correct, perform the procedure under “Receiving GPS Time
Information” (page E-15).
● If you move into another time zone, perform the procedure under “Acquiring GPS Position
Information”. Next, perform one of the procedures under “Time Calibration Signal Auto
Receive”, “GPS Signal Auto Receive”, or “Receiving GPS Time Information” to set the current
time and day.
