Module No. 3515

Calibrating Altitude Readings

To minimize the difference between locally indicated and measured values, you should update the reference altitude value before setting off on and during treks or any other activities where you take altitude readings.

Also, you can ensure accurate measurements by checking a map local altitude indications or some other source for your current location’s altitude, and regularly calibrating watch readings with the latest information while mountain climbing.

Note

You can find out the altitude at your current location from signs, maps, on the Internet, etc.

Differences between actual altitude and watch readings can be caused by the factors below.

Changes in barometric pressure

Changes in temperature caused by variations in barometric pressure and by elevation

Though altitude readings can be taken without calibration, doing so may produce readings that are very different from indications by altitude markers, etc.

  1. Display the current time screen.

    2. Watch Mode

  2. Use (A) and (D) to select [ALTIMETER].

    3. 3515_ALTI

  3. Press (C).

  4. Hold down (A) for at least two seconds.

    5. This displays the altitude measurement setting screen.

    3515_ALTI_set_caps

  5. Use (A) and (D) to move the pointer to [ALTIMETER CALIBRATION].

  6. Press (C).

  7. Use (A) and (D) to move the pointer to [MANUAL].

    8. To return the altitude setting to its initial factory default value, select [OFFSET OFF].

  8. Press (C).

    9. This displays the manual correction screen.

  9. Use (A) and (D) to input the altitude at your current location.

    10. 3515_070_ALTI

  10. Press (C) to complete the setting operation.

    11. After the setting operation is complete, a check mark appears for a few seconds, and then the altitude measurement setting screen re-appears.

  11. Press (E) to exit the setting screen.

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