HR Data stuck and freeze with HRM 2

[Dirk Münster]

Re: Suunto Smart Heart Rate Belt 2

I have massive problems with correct hr measurements with the Smart Heart Rate Belt 2. I pair the Suunto Race 2 and a Amazfit Blance 2, If I start a run it seems to be everything looks fine, but then hr data start to drop and stuck on a specific value for more than 5 minutes, on both devices. I have the newest firmware and also tried a hard reset, no success.

[snow*]

@Dirk-Münster Fwiw I’ve been using the HRM2 almost daily with two bt connections since sept. 8th, and I’ve never had your issue. I’ve Race S.

[Inge Nallsson]

My experience was similarly bad as can be seen in the main thread about the SHRM2:

https://forum.suunto.com/post/197987
https://forum.suunto.com/post/198000
https://forum.suunto.com/post/198023

The HR belt is now returned to seller for evaluation regarding replacement or refund of money.

[2b2bff]

Try importing the activities to Runalyze and look at r-r data.
I have a couple of activities with the HRM 2. The very first has a lot of noise until it stabilized. Then my last activity has been the first one after machine wash the belt. Same picture: a lot of noise and stable signal at the end.

Never had this with the original smart belt…

[Dirk Münster]

Short update on this behavior, yesterday I do a Zwift Workout on my Wahoo Kickr Bike, the HRM2/SHRB2 was connected to Apple TV and to my Amazfit Balance 2 everything works perfect. My guess is that when the HRM2 is paired with the Suunto Race 2 and the Amazfit Balance 2 during a running workout, problems arise because both watches receive the advanced running dynamics data as well as the heart rate. I’ll test this out and pair only one watch at a time whilst running.