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Errors in road grade measurement - Edge 830

1630688
over 3 years ago

I am very, very dissatisfied with some of the "features" on my Edge 830. Specifically the road grade measurement. The readings are displayed with a delay and mostly wrong. There is now software version 9.10 on the device. I have started to observe the described problems now. In November 2021, the road gradient measurement was delayed, but at least showed the correct values. Garmin employees, can you give me some answers on this? If you're reading this here...

  • 0 over 3 years ago

    Garmin employees have limited participation in this forum. You need to call Garmin support for your question. However, there are many posts on this forum complaining about the gradient delay.

  • 0 over 3 years ago

    There are CIQ data fields which can provide better data.  One I think is sensible grade.  The nature of the measurement forces it to be delayed.  I think the grade is measured by the change in altitude over distance which means it can only measure the grade behind you, not in from of you. 

  • 0 over 3 years ago

    Part of the problem is the inaccuracy of the elevation measurements. Just yesterday I logged 85 feet of ascent in 0.125 mile while riding across a nearly flat parking lot.

  • 0 over 3 years ago in reply to cheracogoff

    Not only that, but it seems that Garmin employees don't even use their own devices or they would see all the same problems that customers have to uncover.

  • 0 over 3 years ago in reply to raiderma

    Exactly. That's what pisses me off the most. You get used to the delay, I've seen it from the beginning. But the completely wrong pitch values (14% on the flat)? It measures the gradient completely randomly.

  • 0 over 3 years ago in reply to 1630688

    Of course there must be delay due to the way grade is measured, via the very minute changes in atmospheric pressure as you climb or descend.  You have to climb or descend enough for there to be a measurable change. I do find a couple of IQ apps work quicker and more reliably than the native field, one is Sensible Grade, as others have mentioned.  Also, as a consequence of depending on tiny changes in sensed atmospheric pressure, things that variably disturb air flow around the device can cause fluctuation in grade readings, so that is something to be aware of.  It's best to position and orient the Edge closer to horizontal and not have anything in front of it that can flap or move while underway.