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Calibrating the Astro 320 Barometric Altimeter
Before taking your Astro® 320 dog tracking handheld out or if you are simply noticing elevation information is inaccurate, it is recommended to calibrate1 your altimeter sensor.
Always calibrate the altimeter outdoors with a clear view of the sky.
Calibrating the Astro 320
- Open the Main Menu
- Select Setup
- Select Altimeter
- Select Calibrate Altimeter
- Follow the onscreen prompts to complete calibration
Note: Garmin's outdoor devices are designed as recreational GPS devices, as an aid to navigation. They should not be used for any activity requiring precise measurements, such as surveying or weather prediction.
1 While calibrating to a known elevation can be accurate to +/-50 feet, calibration by GPS is accurate to +/-400 feet.
For more information on barometric altimeter accuracy and proper calibration, see the Related FAQ.