0 Forerunner ® 205/305 Owner’s ManualappendIxHeart Rate MonitorTroubleshootingIf you have trouble pairing withthe heart rate monitor, or if yourheart rate readings are erratic, trythe following suggestions.• Position the Forerunner within3 meters of the sensor whilepairing.• Stay far away from any othersensors while pairing.• Move away from sources ofinterference (see the previouspage).• Restart scan if yourForerunner appears to bepaired with another sensor(see page 46).• Make sure scanning for theheart rate monitor is enabled(see page 46).• Replace the battery.• Clean the sensors. Dirt andsweat build-up on the sensorscan weaken signals.• Reapply moisture. Useelectrode gel, water, or saliva.• Make sure the heart ratemonitor is snug against yourbody. If you have trouble witherratic readings, position thetransmitter on your back.• Wear a cotton shirt, or wetyour shirt. Synthetic fabricsthat rub or flap against theheart rate monitor can createstatic electricity that interfereswith heart rate signals.