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Two Questions about HR Strap

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  • S Offline
    Sergei Ladeishchikov Bronze Member
    last edited by 3 Apr 2025, 05:24

    Hello everyone! Based on your experience, can you tell me if it is acceptable to leave the Suunto heart rate sensor connected to the belt when not in use? Will the battery run out? As far as I remember, I left the Polar H10 sensor connected to the belt, the battery ran out quickly. The Suunto sensor is very difficult to disconnect from the belt and I am afraid to damage the contacts by constantly connecting/disconnecting.

    M 1 Reply Last reply 3 Apr 2025, 08:07 Reply Quote 0
    • M Offline
      Mouse Cruiser Bronze Member @Sergei Ladeishchikov
      last edited by Mouse Cruiser 4 Mar 2025, 08:08 3 Apr 2025, 08:07

      @Sergei-Ladeishchikov In my case, it’s pretty simple: when I go to train, I put on the HR strap, when I’m done, I put it away, wash it, and forget about it. IMHO If it’s idle, it goes to sleep, so there’s no need to turn the device on or off every time.

      Suunto Vertical
      Suunto 9 Baro
      Suunto Spartan
      Suunto Ambit3 peak

      1 Reply Last reply Reply Quote 1
      • S Offline
        Stefano M64 Silver Members
        last edited by 3 Apr 2025, 09:14

        form an electrical point of view, it seems to me that the belt just acts as an extension of the contact pins of the sensor, that is the pads you have to wet, if the belt isn’t in use the sensor shouldn’t drain more current

        Suunto Vector . Vector HR . Core . Race & Race S

        1 Reply Last reply Reply Quote 0
        • S Offline
          Sergei Ladeishchikov Bronze Member
          last edited by 3 Apr 2025, 10:03

          theoretically yes, but the discharge was present for several days in my previous H10, I had to attach and detach the sensor to the belt every training. I checked the detection of the Suunto belt when not in use, through the watch and SA, the belt was not found))

          S B 2 Replies Last reply 3 Apr 2025, 10:21 Reply Quote 0
          • S Offline
            Stefano M64 Silver Members @Sergei Ladeishchikov
            last edited by Stefano M64 22 days from now 3 Apr 2025, 10:21

            @Sergei-Ladeishchikov said in Two Questions about HR Strap:

            I checked the detection of the Suunto belt when not in use

            it is only detected when the skin closes the electrical circuit

            Suunto Vector . Vector HR . Core . Race & Race S

            1 Reply Last reply Reply Quote 1
            • T Offline
              Tami999 Silver Members
              last edited by Tami999 8 days ago 5 Apr 2025, 22:31

              So far Iam happy. HR seems very stable now, without huge drops. With same activity I had 140-150. Before 130-150 with drops to 60 or 40. I thought Iam dying 😄
              . Does anyone know if its good to use CR2032 battery instead of 2050? I got a few brand new.

              M 1 Reply Last reply 7 Apr 2025, 10:33 Reply Quote 0
              • B Offline
                Brad_Olwin Moderator @Sergei Ladeishchikov
                last edited by 6 Apr 2025, 02:07

                @Sergei-Ladeishchikov You do not need to disconnect the sensor. I never do.

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

                S 1 Reply Last reply 6 Apr 2025, 08:55 Reply Quote 0
                • S Offline
                  Sergei Ladeishchikov Bronze Member @Brad_Olwin
                  last edited by Sergei Ladeishchikov 22 days from now 6 Apr 2025, 08:55

                  @Brad_Olwin I thought so) but I have problems with the heart rate, sometimes there is no data from the belt for 20 seconds or 1 minute. My belt is new, about 1 or 2 weeks. Almost every long workout I notice the lack of data, usually I am already warmed up enough and the belt is wet. SA showed the pulse at this moment as a straight line, but in Humango and Intervals zero readings are visible. Before the Suunto belt I used Polar H10, I had this problem with it, but the belt was quite old and the pulse sometimes just hung, but did not disappear. Does anyone have such behavior of the belt or is my belt or sensor faulty?
                  I use SV.

                  B 1 Reply Last reply 6 Apr 2025, 13:01 Reply Quote 0
                  • B Offline
                    Brad_Olwin Moderator @Sergei Ladeishchikov
                    last edited by 6 Apr 2025, 13:01

                    @Sergei-Ladeishchikov Maybe the battery is old, the belt should show HR immediately if wet. Mine does. I assume you have replaced the battery. What color is the material between the contacts on the belt, it should be grey not black. This is on the front side between the contacts that the sensor attaches to.

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

                    S 1 Reply Last reply 6 Apr 2025, 14:22 Reply Quote 0
                    • S Offline
                      Sergei Ladeishchikov Bronze Member @Brad_Olwin
                      last edited by 6 Apr 2025, 14:22

                      @Brad_Olwin The battery is new, shows 100%. The contact pad is gray. The data is interrupted not at the beginning, but during the activity. Since this happened with the old H10, and now with the new Suunto, could the problem be in something else? For example, in the connection between the sensor and the watch?
                      A recent example is below, 45-46 minutes.
                      3d7c7e03-96e2-49b1-b59c-8fa077164e42-{A6B65F19-5855-4C45-A138-83E57498D07E}.png
                      29dc2e9a-1432-4ad8-a193-3381a7f5d5d3-{B6BAEEFF-7931-4495-8328-99BF443FCE39}.png
                      Today’s activity also had a couple of gaps 2 hours after the start of the activity.

                      B 1 Reply Last reply 6 Apr 2025, 14:46 Reply Quote 0
                      • B Offline
                        Brad_Olwin Moderator @Sergei Ladeishchikov
                        last edited by 6 Apr 2025, 14:46

                        @Sergei-Ladeishchikov said in Two Questions about HR Strap:

                        @Brad_Olwin The battery is new, shows 100%. The contact pad is gray. The data is interrupted not at the beginning, but during the activity. Since this happened with the old H10, and now with the new Suunto, could the problem be in something else? For example, in the connection between the sensor and the watch?

                        This could be due to the strap getting dry and/or a tech shirt that may cause static. The first graph is HR, correct? I see where data are missing. I have had the same occur to me when on a SkiMo outing caused by either the belt not completely contacting the skin and dry, cold weather where the belt is not wet and I am not sweating enough. You might try a gel on the belt, it looks to me like the connection between you and the belt is an issue.

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

                        S 1 Reply Last reply 6 Apr 2025, 14:55 Reply Quote 0
                        • S Offline
                          Sergei Ladeishchikov Bronze Member @Brad_Olwin
                          last edited by 6 Apr 2025, 14:55

                          @Brad_Olwin Yes, the first heart rate graph. Yes, I will try using the gel. Thank you!

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                          • M Offline
                            Mattg576 @Tami999
                            last edited by 7 Apr 2025, 10:33

                            @Tami999 I’ve used CR2032 batteries in my Suunto HR belt for years without any problems👍

                            Race
                            9 Peak
                            Ambit 3 Peak
                            Ambit 2R (sold)
                            Suunto T3d (expired)

                            V M 2 Replies Last reply 7 Apr 2025, 11:04 Reply Quote 2
                            • V Offline
                              VoiGAS Silver Members @Mattg576
                              last edited by 7 Apr 2025, 11:04

                              @Mattg576 Nice Hack! So the battery should have more capacity? Less effort to change and less trash 😀


                              Race S
                              Ambit3 Vertical

                              1 Reply Last reply Reply Quote 1
                              • M Offline
                                Mff73 @Mattg576
                                last edited by 7 Apr 2025, 11:13

                                @Mattg576 said in Two Questions about HR Strap:

                                @Tami999 I’ve used CR2032 batteries in my Suunto HR belt for years without any problems👍

                                And still waterproof? 2032 are little thicker no?

                                Suunto Spartan Ultra (since 2016) FW: 2.8.24 (retired)
                                Suunto Vertical all black
                                Wife : S9PP
                                SA: Always the latest beta :)
                                Android 13, Galaxy S205G

                                M 1 Reply Last reply 7 Apr 2025, 15:09 Reply Quote 0
                                • M Offline
                                  Mattg576 @Mff73
                                  last edited by 7 Apr 2025, 15:09

                                  @Mff73 I haven’t swam in the belt but have been wearing it in some torrid weather & I sweat quite heavily so it’s had many total soakings with no issues at all

                                  Race
                                  9 Peak
                                  Ambit 3 Peak
                                  Ambit 2R (sold)
                                  Suunto T3d (expired)

                                  1 Reply Last reply Reply Quote 1
                                  • E Offline
                                    Ecki D. Bronze Member
                                    last edited by 9 Apr 2025, 11:04

                                    Sorry for re-using this thread, but maybe someone knows if it makes sense to turn off the wrist HR sensor when the HR belt is connected?
                                    I did this on my last runs to maybe save battery life.
                                    I once did a bike ride where the HR belt stopped recording, but the wrist sensor didn’t take over, so I think it’s not used anyway.
                                    I haven’t been able to test it yet, so I thought maybe someone here knows.

                                    https://www.strava.com/athletes/37982563
                                    https://www.instagram.com/macdev

                                    M A 2 Replies Last reply 9 Apr 2025, 11:08 Reply Quote 0
                                    • M Offline
                                      Mff73 @Ecki D.
                                      last edited by 9 Apr 2025, 11:08

                                      @Ecki-D.
                                      Once a’ activity is started with one HR source, it doesn’t change.
                                      I personnaly deactivated wrist HR for my running sportsmodes, to avoid having to check if the belt is well connected and activated and let the watch not show any HR at pre-start screen if my belt is “faulty”. Apart from this, if a belt is connected, it should use it by default over the OHR

                                      Suunto Spartan Ultra (since 2016) FW: 2.8.24 (retired)
                                      Suunto Vertical all black
                                      Wife : S9PP
                                      SA: Always the latest beta :)
                                      Android 13, Galaxy S205G

                                      1 Reply Last reply Reply Quote 2
                                      • A Offline
                                        Ars Vitae Bronze Member @Ecki D.
                                        last edited by 9 Apr 2025, 11:17

                                        @Ecki-D. To complement, maybe that would help too. When you use the activity you don’t need to have HR wist additionally turned on, OHR starts automatically. The rest was perfectly explained by @Mff73 .

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