Operation Guide 3148
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
1.In the Timekeeping Mode, hold down A until the city code starts to flash, which indicates the setting screen.
2.Use E and B to select the city code you want.
•Make sure you select your Home City code before changing any other setting.
•For full information on city codes, see the “City Code Table”.
3.Press D to move the flashing in the sequence shown below to select the other settings.
City Code DSTSeconds Hour Minutes Year Format
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Pressure Unit |
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• The following steps explain how to configure timekeeping settings only.
4.When the timekeeping setting you want to change is flashing, use E and/ or B to change it as described below.
Screen | To do this: | Do this: |
| Change the city code | Use E (east) and |
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| B(west). |
| Toggle between Daylight Saving | Press E. |
ON | Time (ON) and Standard Time |
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(OFF). |
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| Toggle between | Press E. |
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| Reset the seconds to 00 | Press E. |
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| Change the hour or minutes |
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| Use E (+) and B |
| Change the year, month, or day |
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5. Press A to exit the setting screen.
Note
• You also need to enter the Timekeeping Mode in order to configure the |
following settings. |
Power saving on/off (“To turn Power Saving on and off”) |
•To avoid the effect of sudden temperature changes during readings, keep the watch on your wrist in direct contact with your skin.
•Do not rely upon this watch for altitude readings or perform button operations while sky diving, hang gliding, or paragliding, while riding a gyrocopter, glider, or any other aircraft, or while engaging in any other activity where there is the chance of sudden altitude changes.
•Do not use this watch for taking altitude readings in applications that demand professional or industrial level precision.
•Remember that the air inside of a commercial aircraft is pressurized. Because of this, the readings produced by this watch will not match the altitude readings announced or indicated the flight crew.
How the Altimeter Measures Altitude
The altimeter can measure altitude based on its own preset values, or a reference altitude specified by you.
When you measure altitude based on preset values
Data produced by the watch’s barometric pressure sensor is converted to approximate altitude based on ISA (International Standard Atmosphere) conversion values stored in watch memory.
When you measure altitude using a reference altitude specified by you
After you specify a reference altitude, the watch will use that value to convert the current barometric pressure reading to altitude.
•When mountain climbing, you can specify a
reference value in accordance with a marker | B |
along the way or altitude information from a |
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map. After that, altitude readings produced | A |
by the watch will be more accurate than they | 400 |
would without a reference altitude. |
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Displaying Your Current Altitude
You can use the procedure described in this section to display your current altitude. If you leave the watch in the Altimeter Mode, it will update the displayed altitude value regularly, and indicate
You can select either of the following two altitude measurement intervals. 0'05": Readings at
2'00": Readings at
•For information about configuring settings for the altitude reading interval and duration, see “To specify the altitude reading interval”.
Important!
•The procedure below simply displays a value indicating your current altitude, without recording it in watch memory. For information about recording altitude readings in watch memory, see “Saving Altitude Readings in Memory”.
To view your current altitude
Temperature, barometric pressure, and altitude units (“To select the |
temperature, barometric pressure, and altitude units”) |
Daylight Saving Time (DST)
Daylight Saving Time (summer time) advances the time setting by one hour from Standard Time. Remember that not all countries or even local areas use Daylight Saving Time.
To change the Daylight Saving Time (summer time) setting
| DST indicator | 1. | In the Timekeeping Mode, hold down A until |
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| the city code starts to flash, which indicates | |
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| the setting screen. | ||
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l | l | 2. | Press D and the DST setting screen appears. |
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l l l | 3. | Use E to cycle through the DST settings in | |
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the sequence shown below.
DST off (OFF) 
DST on (ON)
Altitude change since Altimeter Mode stopwatch measurement started
Altitude graph
Current altitude
Altimeter Mode stopwatch elapsed time
1.In the Timekeeping Mode, use the C button to enter the Altimeter Mode.
•The watch will start altitude measurement and display the result.
•It can take up to four or five seconds for the first altitude reading to appear.
2.If you leave the watch in the Altimeter Mode, the current altitude value and the altitude change value will be updated according to the altitude reading interval.
•If you want to restart the operation at any point, press C.
3.To stop taking altitude readings, press D to exit the Altimeter Mode.
4.When the setting you want is selected, press A to exit the setting screen.
• The DST indicator appears to indicate that Daylight Saving Time is turned on.
Altimeter
The watch’s altimeter uses a pressure sensor to detect current air pressure, which is then used to estimate the current altitude based on ISA (International Standard Atmosphere) preset values. You can specify a reference altitude, which the watch will use to calculate your current altitude based on the value you specify. Altimeter functions also include storage of measurement readings in memory.
Important!
•This watch estimates altitude based on air pressure. This means that altitude readings for the same location may vary if air pressure changes.
•The semiconductor pressure sensor used by the watch for altitude readings is also affected by temperature. When taking altitude readings, make sure
the watch is not subjected to temperature changes.
Notes
•Normally, displayed altitude values are based on the watch’s preset conversion values. You also can specify a reference altitude, if you want. See “Specifying a Reference Altitude”.
•Altitude is displayed in units of 5 meters (20 feet).
•The measurement range for altitude is
•An altitude reading may be displayed be a negative value in cases where there is a reference altitude value specified or because of certain atmospheric conditions.
•The displayed altitude value changes to xxxx meters (or feet) if an altitude reading falls outside the measurement range. The altitude value will be displayed again as soon as the altitude reading is within the allowable range.
•You can select either meters (m) or feet (ft) as the measurement unit for displayed altitude value.
•During altitude measurements, the watch may not be able to update its timekeeping display contents normally. Correct timekeeping is maintained internally, however.
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