I’m opening this post anyway because I think this is not an isolated issue and it could probably be solved with a software change.
I can’t use my Vertical 2 24/7 due to the optical sensor issues already reported in other posts, and this really disappoints me.
Wearing it on my right wrist, as suggested, is not a solution: I don’t wear watches on my right wrist and I don’t want to start.
After doing some research, I read that the Suunto sensor has very low tolerance for SNR (Signal-to-Noise Ratio).
This is great for achieving accurate wrist-based heart rate readings, but it causes the sensor to shut down if skin conditions are not perfect.
This policy might make sense if the wrist OHR sensor were also used for training, but it isn’t, because accurate HR measurements require a chest strap (without a chest strap it’s not even possible to use ZoneSense).
So, in an attempt to improve wrist HR accuracy, wrist HR measurement becomes practically unusable.
Given the recent firmware updates, it’s clear that Suunto takes inspiration from what users write on the forum, so I’ll try to contribute as well.
In everyday and night use, the watch moves, gets bumped, shifts position, and can be worn tighter or looser.
A bit more error tolerance is necessary so that the sensor doesn’t turn off due to minor reading issues and remain off until the user notices it’s no longer working.
When the sensor is on, heart rate detection is accurate.
Moreover, with the Vertical 1 (which used a different type of sensor), I never had this problem.
I hope for a small change that will allow me to use the Vertical 2 every day in normal daily life.
Best regards.
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