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Garmin Edge 820 inclinometer

The inclinometer is quite often wildly inaccurate but occasionally works fine.  Any idea what the problem is and if it can be fixed?

  • AFAIK the native gradient field works off GPS elevation, which is pretty noisy.  There are two IQ apps that I use which use the baro sensor and are much better. 

    They are Altimetric Gradient and Sensible Grade.  They agree pretty well with one a little slower to respond than the other.