Casio 5311 Watch User Manual


 
Operation Guide 5311
E-69
Using the Stopwatch
You can use the stopwatch to measure elapsed times. A fl yback feature (page E-70) lets
you reset the stopwatch to zero without stopping time measurement.
Hands and Indicators
z
Hour Hand: Indicates the stopwatch minute count
(1 revolution = 60 minutes).
x
Second Hand: Indicates the 1/20 (0.05)-second count
during stopwatch operation.
c
Minute Hand: Indicates the stopwatch seconds count.
v
Upper Dial Hand: Indicates the stopwatch minute count
(1 revolution = 120 minutes).
b
Lower Dial Hand: Points to ST.

* B
@+ >
E-68
4. Hold down A for about three seconds until the watch beeps.
x This will make the World Time City (NYC in this example) your new Home City.
At the same time, it will change the Home City you had selected prior to step 4
(TYO in this example), to your World Time City.
x After swapping the Home City and World Time City, the watch will stay in the
World Time Mode. The
x
Second Hand will point to your new World Time City
(TYO in this example).
Note
x If your current World Time City supports time calibration signal reception, making it
your Home City enables calibration signal reception for that city.
E-67
To swap your Home City and World Time City
1. In the World Time Mode, pull out the crown.
2. Rotate the crown to move the
x
Second Hand to the city
you want to select as your World Time City.
x In this example, you would move the
x
Second Hand
to NYC in order to select New York as the World
Time City.
x Wait until the
z
Hour Hand and
c
Minute Hand
complete their move to the time in the currently
selected World Time City. You will not be able to
perform step 4 of this procedure until the hands stop
moving.
3. Push the crown back in.

@
+B
E-66
5. After selecting the city you want, push the crown back in to return to the World
Time Mode.
Swapping your Home City and World Time City
You can use the procedure below to swap your Home City and World Time City. This
capability can come in handy when you frequently travel between two locations in
different time zones.
The following example shows what happens when the
Home City and World Time City are swapped while the
Home City originally is TYO (Tokyo) and the World Time
City is NYC (New York).
Home City World Time City
Before
swapping
Tokyo
10:08 p.m.
(Standard time)
New York
9:08 a.m.
(Daylight saving time)
After
swapping
New York
9:08 a.m.
(Daylight saving time)
Tokyo
10:08 p.m.
(Standard time)

@
E-65
3. Rotate the crown to move the
x
Second Hand to the city code you want to select
as the World Time City.
x Each time you select a city code, the
z
Hour Hand,
c
Minute Hand, and
n
Day
Indicator move to the current time and day for that city code. For details about
city codes, see the “City Code Table” at the back of this manual.
x If you think that the time indicated for the selected World Time City is not correct,
it probably means that there is something wrong with your Home City settings.
Use the procedure under “To confi gure Home City settings” (page E-36) to correct
the Home City settings.
4. Hold down A for about one second to cycle through the summer time settings as
shown below.
AA
AT (AUTO) STD DST
A
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Important!
x Time calibration signal reception is disabled while the watch is in the World Time
Mode.
To view the time in another time zone
1. In the Timekeeping Mode, press C once to enter the World Time Mode.
x The
b
Lower Dial Hand will move to WT.
x To select the UTC zone as your World Time, simply hold down B for about three
seconds. No other operation is required.
2. Pull out the crown.
x The
x
Second Hand points to the currently selected World Time city code.
x The
b
Lower Dial Hand will indicate AT (AUTO), STD (standard time) or
DST (daylight saving time), which indicates the current daylight saving time
setting.
x If you do not perform any operation with the crown for about two minutes after
pulling it out, crown operations will become disabled and the watch hands will no
longer move when you rotate the crown. If this happens, push the crown back in
and then pull it out again.
E-63
Checking the Current Time in a Different Time Zone
You can use World Time to view the current time in one of 29 time zones around the
globe. The currently selected city is called the “World Time City”.
Hands and Indicators
z
Hour Hand: Indicates the hour of the current time in the
World Time City.
x
Second Hand: Indicates the current World Time City
for about three seconds after the World
Time mode is entered.
c
Minute Hand
b
Lower Dial Hand: Points to WT.
n
Day Indicator
x Pressing A causes the
x
Second Hand to move to the
current World Time City for about three seconds.

+
6*B
@
NYC (NEW YORK)
E-62
Storage
x The precision of the bearing sensor may deteriorate if the watch becomes
magnetized. Because of this, you should store the watch away from magnets or
any other sources of strong magnetism, including: permanent magnets (magnetic
necklaces, etc.) and household appliances (TVs, personal computers, washing
machines, freezers, etc.).
x Whenever you suspect that the watch may have become magnetized, perform the
procedure under “To perform bidirectional calibration” (page E-56).
E-61
Location
x Taking a direction reading when you are near a source of strong magnetism can
cause large errors in readings. Because of this, you should avoid taking direction
readings while in the vicinity of the following types of objects: permanent magnets
(magnetic necklaces, etc.), concentrations of metal (metal doors, lockers, etc.),
high tension wires, aerial wires, household appliances (TVs, personal computers,
washing machines, freezers, etc.).
x Accurate direction readings are impossible while in a train, boat, air plane, etc.
x Accurate readings are also impossible indoors, especially inside ferroconcrete
structures. This is because the metal framework of such structures picks up
magnetism from appliances, etc.
E-60
Digital Compass Precautions
Magnetic North and True North
The northerly direction can be expressed either as
magnetic north or true north, which are different from
each other. Also, it is important to keep in mind that
magnetic north moves over time.
x Magnetic north is the north that is indicated by the
needle of a compass.
x True north, which is the location of the North Pole of
the Earth’s axis, is the north that is normally indicated
on maps.
x The difference between magnetic north and true north
is called the “declination”. The closer you get to the
North Pole, the greater the declination angle.
True north
Earth
Magnetic north