Smart Sensor faulty recording and discrepancy with the display

[Yves Jenni]

I’ve suspected a few times that the Smart Sensor was recording incorrect values. Today I saw it for sure. I read 160 bpm on my watch during the final sprint, and 160 bpm also appears as the peak in the data, but the heart rate graph shows 148 bpm as the maximum. At the corresponding point (marker), it was only 137 bpm.

That was a total of 700 meters of elevation, and at the end the climb gets even steeper. You can see how the performance increases, but the heart rate even briefly dips into the green zone. And as I said, around that mark I saw 160 bpm in the red zone on the watch live. The previous green tip pointing downwards is also wrong.

What is being recorded, or what do I see on the watch? In any case, it’s not the same thing.

Another example is something I see sometimes. A straight line over 2 minutes followed by a dip in sustained performance

Am I expecting too much from the technology? But what exactly happens if I see something different on the watch than what’s shown in the recording? Did the watch sensor record while I was seeing live data from the Smart Sensor? I can’t think of any other explanation. It was exactly the kind of situation where an optical sensor is having problems. A cold wind suddenly blew up high, and my skin reacted to the cold.

(Recorded with the Suunto Run)

[Yves Jenni]

Today three and a half hours, of which 26 minutes were straight lines. That’s not normal with a chest strap.

[herlas]

@Yves-Jenni flat hr lines are a clear sign of an issue. You might need to replace either you’re sensor or the belt or even in odd cases both.

[Yves Jenni]

@herlas Thank you. I bought both just a month ago from a Swiss retailer. You mean I should return it as defective? Unfortunately, I can’t find any contactable support at Suunto. It says 24-hour live chat on the website, but I can’t find the chat anywhere : https://www.suunto.com/de-ch/Support/customer-support/

[herlas]

@Yves-Jenni what’s your watch?

[Gunnar]

@Yves-Jenni said in Smart Sensor faulty recording and discrepancy with the display:

@herlas Thank you. I bought both just a month ago from a Swiss retailer. You mean I should return it as defective? Unfortunately, I can’t find any contactable support at Suunto. It says 24-hour live chat on the website, but I can’t find the chat anywhere : https://www.suunto.com/de-ch/Support/customer-support/

You can find the support chat in the app.

[Yves Jenni]

@herlas said in Smart Sensor faulty recording and discrepancy with the display:

@Yves-Jenni what’s your watch?

The Suunto Run

@Gunnar said in Smart Sensor faulty recording and discrepancy with the display:

You can find the support chat in the app.

Ah, Thank you