Garmin Forerunner 405CX Quick Start Manual - Page 8

Step 5: Pair the Heart Rate Monitor (Optional) Tab Heart Rate Monitor Strap Slot Heart Rate Monitor (Front) Electrodes Heart Rate Monitor (Back) While you are trying to pair your heart rate monitor with your Forerunner for the first time, move 10 m away from other heart rate monitors. The heart rate monitor is on standby and ready to send data. Wear the heart rate monitor directly on your skin, just below your breastplate. It should be snug enough to stay in place during your run. 1. Push one tab on the strap through the slot in the heart rate monitor. Press the tab down. 2. Wet both electrodes on the back of the heart rate monitor to create a strong connection between your chest and the transmitter. 3. Wrap the strap around your chest and attach it to the other side of the heart rate monitor. note: The Garmin logo should be right-side up. 4. Press quit or enter to exit power save mode. 5. Bring the Forerunner within range (3 m) of the heart rate monitor. The heart rate icon appears on the training mode pages.  Forerunner 405CX Quick Start Manual