Polar Fitness

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A place to discuss Polar's range of sport watches, fitness bands, sensors and apps.

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M400 losing stride sensor calibration factor (self.polarfitness)

submitted 1 year ago by reattach to c/polarfitness

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Hello everyone!

I've had an M400 for about 8 years. Recently I've noticed that the manual calibration factor on my stride sensor changes (not to 1.000, but to another value) periodically, without my changing it. I have the stride sensor calibration set to "Manual." I think, but am not sure, that it happens after I sync with Polar Flow using my phone. I don't see any settings in Polar Flow where the stride sensor calibration factor would be set.

Anyone else have this problem, or know what I am doing wrong?

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