Operation Guide 3070
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 also 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 data in memory.
You also can measure the altitude differential (change) from a specific reference altitude. Specifying the reference altitude is as simple as pressing a single button to reset the reference altitude to zero.
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 measurements is also affected by temperature. When taking altitude measurements, make sure the watch is not subjected to temperature changes.
•To avoid the effect of sudden temperature changes during measurement, keep the watch on your wrist in direct contact with your skin.
•Do not rely upon this watch for altitude measurements 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 measuring altitude 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
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
•The measured altitude may be a negative value in cases where there is a reference altitude value set or because of certain atmospheric conditions.
•The displayed altitude value changes to xxxx meters (or feet) if a measured altitude falls outside the measurement range. The altitude value will be displayed again as soon as the measured altitude is within the allowable range.
•You can change the measurement unit for displayed altitude values to either meters (m) or feet (ft). See “To select the temperature, barometric pressure, and altitude units”.
To select the altitude measurement type
Altitude measurement type | 1. | In the Altimeter Mode, hold down E for about | |||||||||
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| reference altitude value starts to flash. This is | |
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| l | 2. | Press D to display the current altitude | |
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| 3. | Press A to toggle the altitude measurement |
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| type setting between 0’05 and 2’00. |
• 0’05: Readings at
• 2’00: Readings at
4. Press E to exit the setting screen.
To select an Altimeter Mode display format
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 uses that value to convert the current measured barometric pressure value to altitude.
•When mountain climbing, you can set the
reference value in accordance with a marker | B |
along the way or altitude information from a |
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map. After that, the altitude readings | A |
produced by the watch will be more accurate | 400 |
than they would without a reference altitude. |
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Display format number
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Display Format
Selection Screen
1.In the Altimeter Mode, hold down E for about two seconds until either OFF or the current reference altitude value starts to flash. This is the setting screen.
2.Press D twice to display the format selection screen.
•The number of the currently selected format (1 through 4) will flash on the display.
3.Use A(+) and
•The contents of each of the Altimeter Mode display formats are shown below.
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
The Altimeter Mode gives you a choice of four different display formats. The format you choose determines what type of data is displayed. The Altimeter Mode screen can show any three of the following four items: altitude graph, altitude value, altitude differential, and the current time. You also can select either of the following two altitude measurement types.
0’05: Readings at
2’00: Readings at
•For information about configuring settings for the altitude reading interval and duration, see “To select the altitude measurement type”.
Important!
•The procedure in this section simply displays values indicating your current altitude, without storing them in watch memory. For information about recording altitude readings in watch memory, see “Saving Altitude Data”.
To display your current altitude
| Format 1 |
| Format 2 |
| Format 3 |
| Format 4 | ||||||
Altitude | Altitude | Current | Altitude | Altitude | Current | ||||||||
graph | graph | differential | differential | ||||||||||
| Altitude |
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| time |
| Altitude |
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Current time | Altitude | Current time | Altitude |
4. Press E to exit the setting screen.
•If you selected display format 3 or 4, the watch will measure the altitude differential. See “Altitude Differential” for more information.
Saving Altitude Data
An altitude data save operation saves data in three different records: periodic records, a current session record, and a historical record.
Current altitude
Altitude graph
Altitude
Current differential
timepointer
1.Press A in the Timekeeping Mode or in any of the other sensor modes to enter the Altimeter Mode.
•The watch will start altitude measurement automatically, and display the result.
•It can take up to four or five seconds for the altitude reading to appear after you enter the Altimeter Mode.
2.If you want the altitude value and altitude graph to be updated in accordance with the altitude measurement type (interval and duration) you have selected, leave the watch in the Altimeter Mode.
•If you want to restart the altitude measurement operation at any point, press A.
3.To stop the altitude measurement operation, press D to exit the Altimeter Mode.
To start a new save session
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| 1. Press A to enter the Altimeter Mode. |
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• After you start a save session, the watch starts saving periodic records every 15 minutes. See “Periodic Records” for more information.
• During a save session the watch also periodically updates the current session record. See “Current Session Record” for more information.
• Once you start a save session, measurement continues to be performed, and the REC indicator flashes on the display, even if you change to another mode.
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