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    Doubt about Suunto 9 Baro altimeter/barometer calibration

    Scheduled Pinned Locked Moved Suunto app - Questions & Feedback
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    • mario_bM Offline
      mario_b @Guest
      last edited by

      @flypg if it’s the same algorythm that is used in the ambit3 peak for automatic mode then:
      When in watch mode, it messures every 10 sec. if you move up/down more then 5 meters in elevation (around 0,6hpa) in 3 minutes, it switches to alti-mode. when your are moving less then 5 meters in 12 minutes the watch switches back to baro-mode

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      • ? Offline
        A Former User @mario_b
        last edited by A Former User

        Thanks @mario_b! Now I can understand for what on 1st try the reaction not was immediately and I got better results on 2nd try.

        it messures every 10 sec

        Wow, I imagined that should be a lower value, by this I expected a faster response in the update of the altitude readings. But really not need a faster update in watch mode, because for this I have the Sport Modes.
        Thanks to everyone again!

        Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 1
        • Dimitrios KanellopoulosD Offline
          Dimitrios Kanellopoulos Community Manager @Guest
          last edited by

          @flypg it counts higher than 3-5m variations in 12 minutes. If you would go a bit more low then both devices should react the same.

          That is to wipe out pressure changes as we talked before

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          • Dimitrios KanellopoulosD Offline
            Dimitrios Kanellopoulos Community Manager
            last edited by

            https://www.suunto.com/en-gb/Support/Product-support/suunto_9/suunto_9/valid-for-barometer-version-only/outdoor-insight/

            If you are at a constant altitude (less than 5 meters of vertical movement within 12 minutes), your watch interprets air pressure changes as weather changes and adjusts the barometer graph accordingly.

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            • ? Offline
              A Former User
              last edited by

              Thanks again to everyone!

              Yes @Dimitrios-Kanellopoulos, this explains that on all my attempts I generated a altitude variation > 30m in less than 12 minutes (because I went up and down several times more than the 2 tests).
              The only that is not totally clear is the variation of 1st try that the S9B not registered this +4 of when I went up.

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              • J Offline
                johann.fuehrer Bronze Member @Dimitrios Kanellopoulos
                last edited by

                @Dimitrios-Kanellopoulos I have a Spartan Ultra: I’m sitting at the moment in my office at 214m above sea level. I know from the weather station on my altitude just some 2km away, that we have 2015.4 hPa at 30 C temperature. My watch shows me 2021 hPa. If I like to have a correct pressure reading, I would have to change the altitude to 165m. SO how can I bring this together to see correct altitude AND correct pressure?

                Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                • ? Offline
                  A Former User @Guest
                  last edited by

                  @flypg said in Doubt about Suunto 9 Baro altimeter/barometer calibration:

                  If you are at a constant altitude (less than 5 meters of vertical movement within 12 minutes), your watch interprets air pressure changes as weather changes and adjusts the barometer graph accordingly.

                  🤦
                  I published this myself a couple of weeks ago
                  🤒

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                  • Dimitrios KanellopoulosD Offline
                    Dimitrios Kanellopoulos Community Manager @johann.fuehrer
                    last edited by

                    @johann-fuehrer is it sea level pressure? Can you give me now a coarse location (town)? I can look that up for you

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                    • J Offline
                      johann.fuehrer Bronze Member @Dimitrios Kanellopoulos
                      last edited by

                      @Dimitrios-Kanellopoulos
                      https://www.zamg.ac.at/cms/de/wetter/wetterwerte-analysen/wien/luftdruck/?mode=geo&druckang=red

                      It’s Vienna and “Wien Unterlaa” is the station I mentioned …

                      https://www.zamg.ac.at/cms/de/wetter/wetterwerte-analysen/tawes-verlaufsgraphiken/wien_unterlaa/luftdruck/?mode=geo&druckang=red

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                      • J Offline
                        johann.fuehrer Bronze Member @Dimitrios Kanellopoulos
                        last edited by johann.fuehrer

                        @Dimitrios-Kanellopoulos … and yes, it’s seal level pressure. Local pressure is about 993 hPa

                        You can switch in the pressure chart caption!

                        Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                        • ? Offline
                          A Former User @Dimitrios Kanellopoulos
                          last edited by

                          @Dimitrios-Kanellopoulos said in Doubt about Suunto 9 Baro altimeter/barometer calibration:

                          Lets keep an eye on this.

                          I think that I understood some extra… On my workings days I use a lot the stairs. This results in variations of more than 5m in less than 12 minutes, that result that my watch change to alti-mode. When I have a weather change the pressure variation is assinged to the altimeter and by this I see this big changes on the altitude… can be possible or I´m totally wrong?

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                          • Dimitrios KanellopoulosD Offline
                            Dimitrios Kanellopoulos Community Manager @Guest
                            last edited by

                            @flypg On watch mode there is no mode

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                            • Dimitrios KanellopoulosD Offline
                              Dimitrios Kanellopoulos Community Manager @Guest
                              last edited by

                              @flypg for indoor activities there is automode

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                              • Dimitrios KanellopoulosD Offline
                                Dimitrios Kanellopoulos Community Manager @johann.fuehrer
                                last edited by

                                @johann-fuehrer yeah I see the same from my sources indeed looks like the watch is about 6hpa wrong right ? There is a tool that can calibrate the abs pressure but unfortunately only support can do that.

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                                • J Offline
                                  johann.fuehrer Bronze Member @Dimitrios Kanellopoulos
                                  last edited by

                                  @Dimitrios-Kanellopoulos is there any support here in Vienna which can do this?

                                  Dimitrios KanellopoulosD mario_bM 2 Replies Last reply Reply Quote 0
                                  • Dimitrios KanellopoulosD Offline
                                    Dimitrios Kanellopoulos Community Manager @johann.fuehrer
                                    last edited by

                                    @johann-fuehrer I am not sure 😕 I am very far away (in terms of internal comms) with support stations etc

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                                    • ? Offline
                                      A Former User @Dimitrios Kanellopoulos
                                      last edited by

                                      @Dimitrios-Kanellopoulos Thanks, I think that I need re-read all the post again 😌

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                                      • mario_bM Offline
                                        mario_b @johann.fuehrer
                                        last edited by mario_b

                                        @johann-fuehrer ZAMG does not report QNH ambient pressure. They take the temperature into account. Compare your pressure with the Vienna airport QNH value: https://aviationweather.gov/adds/tafs/?station_ids=LOWW&std_trans=translated&submit_both=Get+TAFs+and+METARs
                                        They are reporting every 30 minutes. (Time is shown is UTC so don‘t get confused)
                                        You can only compare the ZAMG value when it is around 15 degrees Celsius in Vienna.
                                        Greetings from Tirol

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                                        • Dimitrios KanellopoulosD Offline
                                          Dimitrios Kanellopoulos Community Manager @mario_b
                                          last edited by

                                          @mario_b oh. Thats why the variation!

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                                          mario_bM 1 Reply Last reply Reply Quote 1
                                          • mario_bM Offline
                                            mario_b @Dimitrios Kanellopoulos
                                            last edited by

                                            @Dimitrios-Kanellopoulos thats why i allways ask, 🙂 which ambient pressure is used to compare. because QNH is allways calculated with 15 degrees.
                                            and since my a3p is back from service, its spot on with every QNH value around me. 👌

                                            freeheelerF 1 Reply Last reply Reply Quote 0
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