Incorrect Elevation Readings on the vivoactive HR

How Are Elevation Readings Calculated on the vívoactive® HR Watch?

The vívoactive HR will monitor barometric pressure to determine changes in elevation. When the rate of change in pressure is significant, it indicates movement and therefore the changes in pressure indicate elevation change. By default, the watch will calibrate automatically using the GPS elevation reading whenever a new activity is started. However, depending on the GPS signal strength, these elevations can be off by as much as +/- 400 feet at any given point.

How Do I Improve Accuracy of the Elevation Readings on My Device?

You can calibrate the sensor manually, providing an accuracy of within +/- 50 feet at any given point. To maintain this level of accuracy the watch may need to be periodically re-calibrated over time.

To Access the Calibration Option:

1. Hold  to access the Menu.

2. Select Settings.

3. Select Sensors.

4. Select Altimeter.

From here you can choose Calibrate to calibrate the sensor using a current known elevation or toggle the Auto Calibrate setting on or off.

Other Factors to Consider

Some factors that might impact the function of the altimeter/barometer might include rapidly moving air entering the sensor ports while participating in high-speed activities; climate-controlled buildings which can have slightly different pressure indoors compared to the ambient pressure outside; and soap, dirt, or salts from sweat which can clog the sensor port. For the latter, you can try to clean the port by soaking the watch in warm water with a little mild detergent.

IMPORTANT: Never insert anything into the opening as it could damage the sensor inside.