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    Altitude and barometer issues.

    Scheduled Pinned Locked Moved Suunto 9
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    • tomvivT Offline
      tomviv Bronze Member
      last edited by

      Before I send my S9 baro for repair I thought I’d post here to see if anyone could offer any advice. The problem is that the watch no longer seems to display the correct altitude during an activity and the barometric pressure is generally incorrect.
      Before an activity I set the altitude to the correct height and by the end of a run I am supposedly below sea level, see the screenshots. This week I have been at sea level whilst I have been recording the runs with little altitude gain or loss. I have done both soft and hard reset and cleaned the sensor.
      The barometer is always at least 9hPa out.
      If I set the altitude to auto adjust, it eventually gets the correct altitude, so it seems the problem is only during an activity.
      IMG_4790.PNG IMG_4789.PNG IMG_4788.PNG IMG_4787.PNG

      X10, Vector, Ambit2, Suunto 9 Baro + HR smart sensor, PolarX10 HR strap (current) & SA 2.24.1
      Walking, hiking, running, climbing & mountaineering.

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      • isaziI Offline
        isazi Moderator
        last edited by

        Avoid manually setting altitude just before an activity if you want Fusedalti to work.

        Watch: Suunto Vertical Ti

        Blog: isazi's home

        tomvivT 1 Reply Last reply Reply Quote 1
        • tomvivT Offline
          tomviv Bronze Member @isazi
          last edited by

          @isazi Thank you, I have tried this and the altitude is better. However, the barometer is still way out. Any suggestions?

          X10, Vector, Ambit2, Suunto 9 Baro + HR smart sensor, PolarX10 HR strap (current) & SA 2.24.1
          Walking, hiking, running, climbing & mountaineering.

          sartoricS 1 Reply Last reply Reply Quote 0
          • sartoricS Offline
            sartoric Moderator @tomviv
            last edited by

            @tomviv said in Altitude and barometer issues.:

            However, the barometer is still way out.

            What do you mean for “way out” ?

            SVTS - 2.40.38
            SSSWHR BARO Amber - 2.8.32
            Samsung A5 2016 - Android 7.0
            Samsung A33 2022 - Android 14 - One UI 6.1
            Suunto App Android 5.2.5 beta
            Suunto App IOs 2.45.0 (19123) beta on MBP M1

            tomvivT 1 Reply Last reply Reply Quote 0
            • tomvivT Offline
              tomviv Bronze Member @sartoric
              last edited by

              @sartoric around 8-9 hPa

              X10, Vector, Ambit2, Suunto 9 Baro + HR smart sensor, PolarX10 HR strap (current) & SA 2.24.1
              Walking, hiking, running, climbing & mountaineering.

              I Brad_OlwinB freeheelerF surfboomerangS 4 Replies Last reply Reply Quote 0
              • I Offline
                ist-1973 @tomviv
                last edited by ist-1973

                @tomviv said in Altitude and barometer issues.:

                around 8-9 hPa

                If the altitude is set according to Google Earth Pro, then my barometer shows 10 - 11 hPa less than the actual pressure above sea level

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                • Brad_OlwinB Offline
                  Brad_Olwin Moderator @tomviv
                  last edited by

                  @tomviv @ist-1973 How do you know what the actual pressure is? This will vary depending on location and weather. I do not have a commercial weather site close to me so I cannot know exactly what the pressure is. My altitude will change when we have weather events. When I start an exercise FusedAlti will correct the altitude. I rarely adjust my altitude manually. The best way to do this is use the auto adjust, this requires the watch gets a good gps fix.

                  Vector/T6c/Ambit 3 Peak/S5 Copper/S3/S7 Ti/S9 baro Ti/S9P Ti/S9PP Ti/Vertical Ti/Race Ti/RaceS/Ocean/Wing

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                  • freeheelerF Offline
                    freeheeler @tomviv
                    last edited by

                    @tomviv
                    in addition to @Brad_Olwin 's comment, I’d like to add that you might want to read pressure as a relative value only, not as an absolute

                    living sideways

                    tomvivT 1 Reply Last reply Reply Quote 1
                    • surfboomerangS Offline
                      surfboomerang @tomviv
                      last edited by surfboomerang

                      @tomviv I live at sea level and just checked my S9P.

                      Watch: Alt 0m, Baro 1021hPa
                      3 Offical weather stations around me within 30km: 1019.1 - 1019.3 hPa

                      Well within margins I would say and, as @freeheeler already mentioned, the speed in which pressure raises or drops is more important than the exact value.

                      Suunto Vertical Titanium Solar
                      OnePlus Nord 4

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                      • sartoricS Offline
                        sartoric Moderator
                        last edited by

                        As an additional note, the baro sensors in our watches cannot be compared to a precision one used in most professional weather station, so there can be some discrepancies.

                        If you search the forum there is an old topic about pressure,sensors and precision

                        SVTS - 2.40.38
                        SSSWHR BARO Amber - 2.8.32
                        Samsung A5 2016 - Android 7.0
                        Samsung A33 2022 - Android 14 - One UI 6.1
                        Suunto App Android 5.2.5 beta
                        Suunto App IOs 2.45.0 (19123) beta on MBP M1

                        I 1 Reply Last reply Reply Quote 0
                        • I Offline
                          ist-1973 @sartoric
                          last edited by

                          @sartoric The height is the same. The pressure is different.
                          Which clock shows correctly?1.jpg 2.jpg

                          freeheelerF 1 Reply Last reply Reply Quote 0
                          • freeheelerF Offline
                            freeheeler @ist-1973
                            last edited by

                            @ist-1973
                            that’s impossible to tell IMHO… what’s strange is that baro graph isn’t the same. did both watches stay together the past 12 hours?

                            living sideways

                            sartoricS 1 Reply Last reply Reply Quote 0
                            • sartoricS Offline
                              sartoric Moderator @freeheeler
                              last edited by

                              @freeheeler said in Altitude and barometer issues.:

                              did both watches stay together the past 12 hours?

                              And both should be in the same conditions, clean, not covered etc.

                              SVTS - 2.40.38
                              SSSWHR BARO Amber - 2.8.32
                              Samsung A5 2016 - Android 7.0
                              Samsung A33 2022 - Android 14 - One UI 6.1
                              Suunto App Android 5.2.5 beta
                              Suunto App IOs 2.45.0 (19123) beta on MBP M1

                              I 1 Reply Last reply Reply Quote 1
                              • I Offline
                                ist-1973 @sartoric
                                last edited by

                                @sartoric Yes. Together.

                                I 1 Reply Last reply Reply Quote 0
                                • I Offline
                                  ist-1973 @ist-1973
                                  last edited by

                                  @ist-1973 On the clock scale, the division price is different. 2 hPa, and 4 hPa

                                  I 1 Reply Last reply Reply Quote 0
                                  • I Offline
                                    ist-1973 @ist-1973
                                    last edited by

                                    @ist-1973 The conditions are the same. Together on a closet shelf.

                                    freeheelerF 1 Reply Last reply Reply Quote 0
                                    • freeheelerF Offline
                                      freeheeler @ist-1973
                                      last edited by

                                      @ist-1973
                                      strange… maybe you need to clean the sensor (soak it in water) and observe again

                                      living sideways

                                      I 1 Reply Last reply Reply Quote 0
                                      • I Offline
                                        ist-1973 @freeheeler
                                        last edited by ist-1973

                                        222.jpg @freeheeler
                                        Today I went for a run with my wife along the same route. Here is the data.
                                        Difference in watch pressure 9 hPa![1659269024817.jpg]
                                        444.jpg (/assets/uploads/files/1659269649255-1659269024817.jpg) 1659269024822.jpg ![1659269024829.jpg]!555.jpg (/assets/uploads/files/1659269685098-111.jpg)333.jpg

                                        freeheelerF 1 Reply Last reply Reply Quote 1
                                        • freeheelerF Offline
                                          freeheeler @ist-1973
                                          last edited by

                                          @ist-1973
                                          looks alright 👍
                                          I assume you can ignore the pressure difference as everything else looks good 🙂

                                          living sideways

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                                          • tomvivT Offline
                                            tomviv Bronze Member @freeheeler
                                            last edited by

                                            @freeheeler thank you. I think this is where I was going wrong although I’m assuming absolute pressure is at sea level, which is where I was for the week. Now I am back at home it makes more sense for the readings to be out by 8-9 hPa given my altitude.

                                            X10, Vector, Ambit2, Suunto 9 Baro + HR smart sensor, PolarX10 HR strap (current) & SA 2.24.1
                                            Walking, hiking, running, climbing & mountaineering.

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