Blood oxygen
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i have the same problem. My Race 2 cannot measure the blood oxygen by manual.The software version is 2.48.16.
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@Dimitrios-Kanellopoulos Same probleme. Low measurements and no manual possible. SW 2.48.16 app Android 6.4.7
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I had problems before but with 2.48.16 it works fine. Did you tried soft reset?
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@Eddy-De-Backer unfortunately, i tried to soft reset but it did not work for me.
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@S.Pichi the same for me
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@Eddy-De-Backer Same issue no manual measures , soft reset didn’t help.
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My Suunto Race 2 stopped measuring blood oxygen after updating to version 2.48.16. Manual measurements don’t work at all, and the nighttime readings are inaccurate. A soft reset didn’t help.
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My watch too

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@Dimitrios-Kanellopoulos when i try manually have consistently below 90% saturation with firmware 2.48.16 on 9Peak Pro, but nightly measurement are ok (98-100%)
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It worked for me well but last two nights bloodoxygen recorded around 85% and i am not able to measure manually. Restart didn’t helped too.
Prior this i had one night watch on night table instead of hand. Not sure if related to it.