Operation Guide 5311
Digital Compass Precautions
Magnetic North and True North
Location
ξ 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 |
True north
Magnetic north 
Earth
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.
ξMagnetic north is the north that is indicated by the needle of a compass.
ξTrue north, which is the location of the North Pole of the Earth’s axis, is the north that is normally indicated on maps.
ξThe difference between magnetic north and true north is called the “declination”. The closer you get to the North Pole, the greater the declination angle.
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.). |
ξ Accurate direction readings are impossible while in a train, boat, air plane, etc. |
ξ 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. |
Storage
ξThe 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.).
ξWhenever you suspect that the watch may have become magnetized, perform the procedure under “To perform bidirectional calibration” (page
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”.
NYC (NEW YORK) | 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. | ||
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| n Day Indicator | |
| ξ Pressing Acauses the x Second Hand to move to the | |
| current World Time City for about three seconds. |
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Important!
ξTime 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 Conce to enter the World Time Mode.
ξThe b Lower Dial Hand will move to WT.
ξTo select the UTC zone as your World Time, simply hold down Bfor about three seconds. No other operation is required.
2.Pull out the crown.
ξThe x Second Hand points to the currently selected World Time city code.
ξThe b Lower Dial Hand will indicate AT (AUTO), STD (standard time) or DST (daylight saving time), which indicates the current daylight saving time setting.
ξIf 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.
3.Rotate the crown to move the x Second Hand to the city code you want to select as the World Time City.
ξEach 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.
ξIf 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 configure Home City settings” (page
4.Hold down Afor about one second to cycle through the summer time settings as shown below.
A A
AT (AUTO) |
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| STD |
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| DST | ||
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A
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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.
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. |
ξ In this example, you would move the x Second Hand |
to NYC in order to select New York as the World |
Time City. |
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 | Tokyo | New York | |
10:08 p.m. | 9:08 a.m. | ||
swapping | |||
(Standard time) | (Daylight saving time) | ||
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After | New York | Tokyo | |
9:08 a.m. | 10:08 p.m. | ||
swapping | |||
(Daylight saving time) | (Standard time) | ||
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ξ 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. |
4.Hold down Afor about three seconds until the watch beeps.
ξThis 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.
ξAfter 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
ξIf your current World Time City supports time calibration signal reception, making it your Home City enables calibration signal reception for that city.
Using the Stopwatch
You can use the stopwatch to measure elapsed times. A flyback feature (page
Hands and Indicators
zHour Hand: Indicates the stopwatch minute count
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| x Second Hand: Indicates the 1/20 |
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| during stopwatch operation. |
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| c Minute Hand: Indicates the stopwatch seconds count. | |||
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| v Upper Dial Hand: Indicates the stopwatch minute count |
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| (1 revolution = 120 minutes). |
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| b Lower Dial Hand: Points to ST. |
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