Only calibration you would do out of the box is compass calibration. Pop the impeller out, wipe the kestrel impeller recess clean and around the impeller, then pop it back in. Make sure you don't press on the middle where the screw is. The triangle goes on the 12 o'clock like in Fig 1. After that turn on the 5700 elite, press settings button, change mode to weather, press up or down arrows until you hit WIND SPD and blow into the impeller for a minimum of 3 seconds to see if it reads wind. If not, the bearing in the impeller may be bad. If so either return to place of purchase and exchange or use the warranty service. You can also contact via private message
@Kestrel Ballistics for further info.
https://kestrelinstruments.com/kestrel-repair-request
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