Suunto HR Belt unreliable with 9 Peak Pro since firmware update - anyone can confirm?

[Brad_Olwin]

@Pyranya I used mine yesterday and it was fine. I will try again today and report back.

[Pyranya]

@Brad_Olwin
You’re using a 9 Peak Pro as well? What firmware you’re on? My watch is on firmware 2.50.28

greez

[Brad_Olwin]

@Pyranya said:

@Brad_Olwin
You’re using a 9 Peak Pro as well? What firmware you’re on? My watch is on firmware 2.50.28

greez

Same firmware, it is the last available. I was doing some testing and I will repeat today and get back here on my results.

[jthomi]

Also using a 9PP with the latest firmware and the original Suunto Smart HR Belt. I do not have (all?) those issues, sometimes it looses connection but the graphs look fine as far as I can tell. But I also will watch this and see if anything weird occurs.

[Brad_Olwin]

@Pyranya Here is the example from my run, a 20 min walk today was fine as well. V2 and S9PP paired to SHRM2

Walk with Run 2 OHR and S9PP with SmartSensor, these don’t match as well as I would have expected.

[Pyranya]

@Brad_Olwin
@Ecki-D

I’m not sure, but you can see from the graph that there’s a regular drop in heart rate at that point. It seems to me that this happens every time the connection is lost.

During this run, I made sure to maintain a consistent pace throughout. The first 5 minutes and the last 5 minutes were slower than the 20 minutes in between.

greez

[isazi]

@Pyranya have you checked the R-R plot of your heart rate data? The strap may be not working anymore, and that is not fixed by changing a battery.

[Pyranya]

@isazi

Where do I find the R-R plot of my HR data?

greez

[isazi]

@Pyranya it is not in Suunto App. Export your file to an external service, such as Runalyze or quantified-self.io and check it there. If it is very noisy, then there is some issue with your strap.

[Pyranya]

@isazi

Used Runalyze:

It seems to look very noisy.

greez

[sartoric]

@Pyranya
indeed

it looks ok at the beginning, then it goes bananas
What’s that sample duration ?

[Pyranya]

@sartoric

Duration for the run was 30min.

greez

[Pyranya]

I’m going to test the HR Belt with a different phone and a different app and then see what the results look like.

greez

[Swaddy61]

@Brad_Olwin It seems to me there are some pretty big (like huge) HR spikes on the V2. I am not sure I am understanding what you have written. Are both the V2 and the S9PP paired to the HRM2 at the same time? If so, why are there big spikes on one, and why don’t the traces match exactly?

[Brad_Olwin]

@Swaddy61 said:

@Brad_Olwin It seems to me there are some pretty big (like huge) HR spikes on the V2. I am not sure I am understanding what you have written. Are both the V2 and the S9PP paired to the HRM2 at the same time? If so, why are there big spikes on one, and why don’t the traces match exactly?

Yes, both connected to the same SHRM2, it could be that the V2 was not receiving the signal as well. The V2 is on field test firmware and that could be an issue. I would not pay much attention to it.

[Brad_Olwin]

@Pyranya said:

I’m going to test the HR Belt with a different phone and a different app and then see what the results look like.

greez

The data look bad on Runalyze, it is most likely the strap. Depending on smoothing with whatever device you test it may be ok but not for the 9PP or any other Suunto watch. I have had this issue as well when my straps wear out. The SmartSensor straps last between 6 months to 1 year for me.

[Pyranya]

@Brad_Olwin

So the sensor may be fine?

greez

[sartoric]

@Pyranya usually yes

[Pyranya]

@sartoric

Thank you

[Brad_Olwin]

@Pyranya said:

@Brad_Olwin

So the sensor may be fine?

greez

Yes, my sensors last forever, still using one from Ambit 3 Peak