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Signal Reception Precautions
When the watch is unable to adjust its time
●
in accordance with a GPS signal for some
reason, average timekeeping accuracy is
within ±15 seconds per month.
Note that an internal decoding process the
●
watch performs after it receives a GPS
signal may cause the time setting to be
slightly off (by less than one second).
GPS signal reception is not possible under
●
the conditions described below.
While
or lower is displayed for the
ー
battery level
While the watch is connected with a
ー
phone and data communication is in
progress
While the watch's Airplane Mode is
ー
enabled
While sleep measurement is in progress
ー
If the receive operation is successful, the
●
time and day settings will be adjusted
automatically in accordance with the Home
City (time zone) and summer time settings.
Summer time will not be applied correctly in
the cases described below.
When the summer time start date and
ー
time, end date and time, or other rules are
changed by authorities
When location information is received,
ー
but it is not location information for your
actual location (For example, when you
are near a borderline of a city and the
acquired location information is for a
neighboring city, etc.)
Using GPS Outside Your Country
Some countries or geographic areas put legal
restrictions on the use of GPS, on the
collection and logging of location information,
etc. Your watch has built-in GPS functionality,
so before embarking on international travel to
a country or area outside of the country where
you purchased your watch, you should check
with the embassy of the countries you plan to
visit, your travel agency, or some other reliable
source of information to find out if there are any
prohibitions or restrictions on bringing in
devices with GPS functionality, or on the
logging of location information, etc.
Watch Operation Guide 3515
Using Watch Operations to
Adjust the Time Setting
You can use the procedure below to adjust the
watch's date and time settings manually when
GPS signal reception or communication with
a phone is not possible for some reason.
Setting a Home City
●
Use the procedure in this section to select a
city to use as your Home City.
1.
Display the current time screen.
Watch Mode
l
2.
Hold down (A) for at least two seconds.
This enters the Control Mode.
3.
Use (A) and (D) to select [SETTING].
4.
Press (C).
This displays the setting menu screen.
Pointer
5.
Use (A) and (D) to move the pointer to
[WATCH SETTINGS].
6.
Press (C).
7.
Use (A) and (D) to move the pointer to
[HOME TIME].
8.
Press (C).
9.
Use (A) and (D) to move the pointer to
[HOME TIME CITY].
10.
Press (C).
11.
Use (A) and (D) to move the pointer to the
city you want to use as your Home City.
12.
Press (C) to complete the setting
operation.
After the setting operation is complete, a
check mark appears for a few seconds,
and then the home time setting screen re-
appears.
13.
Hold down (E) for at least one second to
return to the current time screen.
Configuring the Summer Time Setting
●
If you are in an area that observes summer
time, you can also enable or disable summer
time.
Note
The initial factory default summer time
●
setting for all cities is [AUTO]. In many
cases, [AUTO] lets you use the watch
without switching manually between
summer time and standard time.
In the cases described below,
●
receiving location information by GPS
will cause [AUTO] to be automatically
selected for the summer time setting.
When the time zone of the current
ー
receive operation is different from
the watch's time zone setting prior to
the receive operation.
When the time zone is unchanged,
ー
but the acquired location information
is for a geographic area with
different summer time rules (start
date, end date)
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