How can I tell if my brand-new HRM Dual is functional? I have paired it with my (also brand-new) Forerunner 735XT. Before I begin a run, I wait for the message that the chest strap is paired with the wristwatch. Once I get that notification, I go.
However I don't see any difference in the data that is collected on the Garmin Connect app whether or not I wear the chest strap. There is no indication in the app or on my watch where the data that it is displaying is pulling from.
My assumption based on a few trial runs with and without the strap is that it only is using data that is collected from the watch and completely ignoring the strap.
Is there a way to know for sure?