The Battle of the Battered Battery. When your Garmin heart rate monitor (HRM) stops working - and it will - typically a couple years (depending on your usage), do not rush into changing the battery. First make sure that the battery is actually dead. Really. Don't rush into changing it thinking its dead. Go to. Settings --> Sensors & Accessories. Accessories. I have an HRM Dual I've been using for a while, and suddenly it's no longer measuring my heart rate at all. That is, my devices (both a Fenix 5 Plus and an iPhone) can still pair with the HRM Dual, but both of them read 0 bpm while connected. I've tried washing the strap, replacing its battery, and cleaning its contacts thoroughly Thanks! HRM-Run (and HRM-Tri) are ANT+ only. They do not have bluetooth at all. HRM-Dual and HRM-Pro have bluetooth. Thanks a lot! cable allows to bundle multiple ant sensors and transmit their data as BLE. Depending on your situation it’s worth the $. How Heart Rate-Tracking Devices Work. When it comes to tracking your ticker, there are two popular options: chest straps and wrist- or arm-worn devices. Most chest-based monitors work by measuring When uploading the ride, it is in the red sone all the way, with a new max heart rate almost 100 bpm over my correct max. With other belts I just disconnect one of the contacts between sensor and belt. Very disappointing that Garmin did not make the HRM-pro like the HRM-duo, with a dismountable sensor. Reply. HRM-Run™ | Garmin Customer Support. SHOP THE HOLIDAY SALE! FREE SHIPPING ON ORDERS OVER $25. Garmin Support Center. Garmin Support Center is where you will find answers to frequently asked questions and resources to help with all of your Garmin products. The Garmin HRM-Dual has a wide, comfortable, easily adjusted strap, which links up via a hook and loop closure on its right side. There’s a cloth tab to stop the fastening digging into you Running Power not Recording with HRM-Tri. hoyhoy over 5 years ago. My HRM-Tri was connected to the Fenix 5X, but running power was missing for the first few minutes of my run. Is this a known problem? A dedicated community for Garmin users to ask questions, provide answers, and share feedback. Ensure the module is fixed to the strap correctly. (only applicable to HRM’s with removable module) If using a HRM, wet the electrodes on the strap & position it on your body securely as per the user manual instructs. Perform 5-10 start jumps to get your heart rate up & commence the pairing process. The HRM-Dual has Bluetooth and ANT+ connectivity, so it will work with sports watches as well as your smartphone. If you're looking for more, you can choose the Garmin HRM Run/Swim/Pro, which all CDa8VK.