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Doubt about Suunto 9 Baro altimeter/barometer calibration

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  • D Offline
    Dimitrios Kanellopoulos Community Manager @johann.fuehrer
    last edited by 19 Aug 2019, 15:44

    @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.

    Community Manager / Admin @Suunto
    Creator of Quantified-Self.io
    youtube.com/c/dimitrioskanellopoulos
    https://instagram.com/dimitrioskanellopoulos
    https://www.strava.com/athletes/7586105

    J 1 Reply Last reply 19 Aug 2019, 15:45 Reply Quote 0
    • J Offline
      johann.fuehrer Bronze Member @Dimitrios Kanellopoulos
      last edited by 19 Aug 2019, 15:45

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

      D M 2 Replies Last reply 19 Aug 2019, 15:48 Reply Quote 0
      • D Offline
        Dimitrios Kanellopoulos Community Manager @johann.fuehrer
        last edited by 19 Aug 2019, 15:48

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

        Community Manager / Admin @Suunto
        Creator of Quantified-Self.io
        youtube.com/c/dimitrioskanellopoulos
        https://instagram.com/dimitrioskanellopoulos
        https://www.strava.com/athletes/7586105

        1 Reply Last reply Reply Quote 0
        • ? Offline
          A Former User @Dimitrios Kanellopoulos
          last edited by 19 Aug 2019, 15:53

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

          1 Reply Last reply Reply Quote 0
          • M Offline
            mario_b @johann.fuehrer
            last edited by mario_b 20 Aug 2019, 04:38

            @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

            D J 2 Replies Last reply 20 Aug 2019, 07:01 Reply Quote 2
            • D Offline
              Dimitrios Kanellopoulos Community Manager @mario_b
              last edited by 20 Aug 2019, 07:01

              @mario_b oh. Thats why the variation!

              Community Manager / Admin @Suunto
              Creator of Quantified-Self.io
              youtube.com/c/dimitrioskanellopoulos
              https://instagram.com/dimitrioskanellopoulos
              https://www.strava.com/athletes/7586105

              M 1 Reply Last reply 20 Aug 2019, 07:11 Reply Quote 1
              • M Offline
                mario_b @Dimitrios Kanellopoulos
                last edited by 20 Aug 2019, 07:11

                @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. 👌

                F 1 Reply Last reply 20 Aug 2019, 07:12 Reply Quote 0
                • F Offline
                  freeheeler @mario_b
                  last edited by 20 Aug 2019, 07:12

                  @mario_b
                  😱 15’000km service?!
                  what was wrong with it?

                  living sideways

                  M 1 Reply Last reply 20 Aug 2019, 07:36 Reply Quote 0
                  • J Offline
                    johann.fuehrer Bronze Member @mario_b
                    last edited by 20 Aug 2019, 07:30

                    @mario_b Hm, then I do not understand that:
                    LOWW at 8:50 local time: 1020 mBar at 22 degree Celsius, altitude 183m
                    ZAMG reading of Schwechat, 9:00 local time 1019.8 (998.6) hPa at 22.1 degrees Celsius, alt 183m
                    ZAMG reading in Vienna at 9:00 for all stations in between 1019.4 and 1019.9, of course depending on altitude and temerature, which varies about 2 degrees Celsius.
                    My reference from yesterday, Unterlaa at 9:00: 1019.6 mBar (996.6) at 21.8 degrees C, alt 200m
                    My reading on the watch: 1024 hPa at 22 degree, alt 209 m

                    So it’s off about 4 mBar. Or can you explain this?

                    J 1 Reply Last reply 20 Aug 2019, 07:34 Reply Quote 0
                    • J Offline
                      johann.fuehrer Bronze Member @johann.fuehrer
                      last edited by 20 Aug 2019, 07:34

                      @johann-fuehrer … that would be an altitude difference of about 35 m. I used this calculator: https://www.mide.com/pages/air-pressure-at-altitude-calculator

                      M 1 Reply Last reply 20 Aug 2019, 07:48 Reply Quote 0
                      • M Offline
                        mario_b @freeheeler
                        last edited by 20 Aug 2019, 07:36

                        @TELE-HO 🙂 more a 1000km service. but to be honest. it was nothing wrong. just a few other guys had the same value with ambient pressure, and mine did not match them. but altimeter worked flawlessly.
                        i have to say thank you again to @Dimitrios-Kanellopoulos and the awesome suunto customer service for help. they wanted me to send the watch in to check if everything is ok. they’ve exchanged the pressure sensor. now it is spot on. i was just tooo nitpicky. (also i know that it will show a different value over time).

                        F 1 Reply Last reply 20 Aug 2019, 07:48 Reply Quote 1
                        • F Offline
                          freeheeler @mario_b
                          last edited by 20 Aug 2019, 07:48

                          @mario_b
                          my experience with Suunto customer service is one of the best I’ve ever experienced!
                          My wife had problems with her A3R from start (battery capacity calculation etc) and it was fixed within a week 👌

                          Ok, I did not expect huge problems with your watch, good to know 🙂

                          I did not play around on the baro settings, I actually only use the alti mode and really never look at the baro itself.
                          But it was a very good hint from you regarding the fused alti and when it kicked in. Next time I will know, thank you!

                          living sideways

                          M 1 Reply Last reply 20 Aug 2019, 07:54 Reply Quote 1
                          • M Offline
                            mario_b @johann.fuehrer
                            last edited by 20 Aug 2019, 07:48

                            @johann-fuehrer just to be sure:

                            • you know the exact elevation you are when reading your watch pressure? and the altimeter is set correctly?
                            • you did the fridge test which @Dimitrios-Kanellopoulos mentioned above?
                            • you are not inside a building?
                            J 1 Reply Last reply 20 Aug 2019, 07:55 Reply Quote 0
                            • M Offline
                              mario_b @freeheeler
                              last edited by 20 Aug 2019, 07:54

                              @TELE-HO yes suunto service is fantastic.
                              no it really didn’t.

                              on small hikes i do not record it, but wanna know the nearly correct elevation. and a guy from search and rescue (with an a3p) told me: if you look at the nearest weatherstations ambient pressure and compare that with your watch, you know about +/-10-15 meters if your elevation is correct, without the need of activating gps. and that works very well. 👍

                              1 Reply Last reply Reply Quote 1
                              • J Offline
                                johann.fuehrer Bronze Member @mario_b
                                last edited by 20 Aug 2019, 07:55

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

                                @johann-fuehrer just to be sure:

                                • you know the exact elevation you are when reading your watch pressure? and the altimeter is set correctly?

                                Definitely!

                                • you did the fridge test which @Dimitrios-Kanellopoulos mentioned above?

                                Yes, coming back to exact the same altitude. In my opinion it was very quick, some 5 minutes. But I’ll do it again if you like.

                                • you are not inside a building?

                                No.
                                I did check this also inside the office (open windows), so ambient pressure inside and outside should be equal, no aircondition and the behaviour is the same like outside.

                                M J 2 Replies Last reply 20 Aug 2019, 07:58 Reply Quote 0
                                • M Offline
                                  mario_b @johann.fuehrer
                                  last edited by 20 Aug 2019, 07:58

                                  @johann-fuehrer so maybee it should be recalibrated. i would ask the support.

                                  1 Reply Last reply Reply Quote 0
                                  • J Offline
                                    johann.fuehrer Bronze Member @johann.fuehrer
                                    last edited by 20 Aug 2019, 09:19

                                    @johann-fuehrer said in Doubt about Suunto 9 Baro altimeter/barometer calibration:

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

                                    @johann-fuehrer just to be sure:

                                    • you know the exact elevation you are when reading your watch pressure? and the altimeter is set correctly?

                                    Definitely!

                                    • you did the fridge test which @Dimitrios-Kanellopoulos mentioned above?

                                    Yes, coming back to exact the same altitude. In my opinion it was very quick, some 5 minutes. But I’ll do it again if you like.

                                    • you are not inside a building?

                                    No.
                                    I did check this also inside the office (open windows), so ambient pressure inside and outside should be equal, no air condition and the behavior is the same like outside.

                                    Finally, meetings are over: watch was 1 hour in the fridge @ 8 degrees Celsius:

                                    10:00 before fridge, 1024 hPa, 30 C, @ 210 m
                                    11:00 immediately after taking out the fridge, 1024 hPa, 8 C, @ 210m
                                    11:15 another 15 mins later…, 1024 hPa, 25 C (still going up) @ 210m

                                    LOWW & ZAMG still at 1020/1019.5

                                    D M 2 Replies Last reply 20 Aug 2019, 09:32 Reply Quote 0
                                    • D Offline
                                      Dimitrios Kanellopoulos Community Manager @johann.fuehrer
                                      last edited by 20 Aug 2019, 09:32

                                      @johann-fuehrer if not affected by temp your sensor is pretty well clean and no defect

                                      Community Manager / Admin @Suunto
                                      Creator of Quantified-Self.io
                                      youtube.com/c/dimitrioskanellopoulos
                                      https://instagram.com/dimitrioskanellopoulos
                                      https://www.strava.com/athletes/7586105

                                      1 Reply Last reply Reply Quote 0
                                      • M Offline
                                        mario_b @johann.fuehrer
                                        last edited by 20 Aug 2019, 09:40

                                        @johann-fuehrer are you at the “Umspannwerk Südost”? that’s the only point which is on 200m elevation. according to different maps, the rest of unterlaa is between 165 and 180m of elevation.

                                        J 1 Reply Last reply 20 Aug 2019, 09:52 Reply Quote 0
                                        • J Offline
                                          johann.fuehrer Bronze Member @mario_b
                                          last edited by 20 Aug 2019, 09:52

                                          @mario_b I had been, but now im at Hauptbahnhof/Belvedere which is (funny) also at 200m (Info from Geodatenviewer, wien.gv.at).But the pressure in different altitudes here in Vienna is not that big at the moment so that this would have an effect.

                                          M 1 Reply Last reply 20 Aug 2019, 11:16 Reply Quote 0
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