Garmin Forerunner 305 Heart Rate Monitor Guide (Multilingual) - Page 3

5. If heart rate data does not appear or if you have erratic heart rate data, you may have to tighten the strap on your chest or warm up for 5-10 minutes. If the problem persists, you may have to pair the sensors. See your owner's manual. Pair the Sensors Pairing is the connecting of ANT+Sport™ wireless sensors, like your heart rate monitor with a Forerunner. After you pair the first time, your Forerunner automatically recognizes your heart rate monitor each time it is activated. Note: The pairing settings differ for each compatible Forerunner and Edge model. See your owner's manual. Battery Information The heart rate monitor contains a user-replaceable CR2032 battery. Note: Contact your local waste disposal department to properly dispose of batteries. 1. Locate the circular battery cover on the back of the heart rate monitor. 2. Use a coin to twist the cover counter-clockwise so the arrow on the cover points to OPEN. 3. Remove the cover and replace the battery with the positive side facing up. EN-