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Wrist-based heart rate monitor still active while using pulse strap

MLumholdt
over 2 years ago

Hi Garmin enthusiasts 

I have owned garmin watches for the past 10 years, and recently bought the fenix 6x pro solar and the HRM-pro. 
I have paired the devices, and took them out for a run today. I checked that the pulse strap was connected to the watch before the exercise and began the run activity. After about 2 km I noticed that my pulse was lower that it used to be, and by inspecting the watch I found out that the wrist-based heart rate monitor was active. I checked again that the HRM-pro was connected, and it was. 
How do I turn off the wrist-based heart rate. 

  • 0 over 2 years ago

    You can change the power mode to "Jacket Mode". This disables the wrist-based hrm and only uses the data from the HRM-pro then.

  • 0 over 2 years ago in reply to Jaran

    Thank you for your answer. Do I have to turn it off before every run or is I automatic then? 

  • 0 over 2 years ago in reply to MLumholdt

    You can either change it before/during your run or you can set the default power mode to "Jacket" for your run-activity as a whole:

    "From the watch face, hold MENU, select Activities & Apps, select an activity, and select the activity settings."

    One of those settings is the power mode where you can set the default power mode for that activity. That way you can always start a run with "Jacket" power mode. Just don't forget to change it whenever you run without your HRM-pro.

  • 0 over 2 years ago

    If your HRM-Pro is connected, that's the data it's using.  The watch keeps the HR sensor on mostly for Garmin Pay I believe.

    You can tell your watch used the HRM-Pro for data if you have a recorded Resperation Rate with your activity.  The Wrist HR can't monitor that while you're doing an intense activity.

    I have never bothered stuffing around with Jacket Mode.  If your HRM is connected, that's the data it's using, regardless of what the little green flashy light is doing.

    If you really need to prove it to yourself, take your watch off and hold it while you run Stuck out tongue

  • 0 2 months ago in reply to muppetman

    I have don that, and it stop showing my power when running on treadmill

  • 0 2 months ago

    I have sometimes exact situation. Im switching off OHR before the run to be sure that HR data is from HRM Pro

  • 0 2 months ago in reply to andrej-svk

    You don't need to do that. If a HRM is connected, that's the data it uses.

  • 0 2 months ago in reply to andrej-svk

    How are you verifying your data is coming from the wrist HR?

  • 0 2 months ago in reply to muppetman
    muppetman said:
    You don't need to do that. If a HRM is connected, that's the data it uses.

    Except if Garmin recently added the Heart Rate Dynamic Source Switching also to Fenix 6, as they did with other models. However, currently the documentation does not list Fenix 6 among the devices supporting this feature.

    muppetman said:
    How are you verifying your data is coming from the wrist HR?

    You can verify it by uploading the FIT file of the activity to the FIT File Viewer and the viewing the charts. If the chart options for the Y1 an Y2 fields contain the options "heart rate", "external heart rate", and "wrist heart rate", then both sensors are used, and the first field option ("heart rate") is the resulting combined data curve you see in Garmin Connect. And if you view both "external heart rate" and "external heart rate" simultaneously, and see that "wrist heart" partially differs from "external heart rate" (just like in the example below), then it means the wrist HR was used instead of the external HRM.

    And of course, if the connection to the external HRM fails, the watch may use the internal sensor even without the Dynamic Source Switching.

    If you want to exclude that the internal sensor is used regardless on the state of the external HRM, then (as already suggested earlier in this thread) you can assign the Jacket Power Mode to the concerned activity profiles (it disables the internal HR sensor). On watches with the full support of the Dynamic Source Switching, you can disable it in the settings (and I still assume Fenix 6 does not have this option).