The sensor may be tilted when installed on an asymmetricalhub. This does not affect operation.3 Rotate the wheel to check for clearance.The sensor should not contact other parts of your bike.NOTE: The LED flashes green for five seconds to indicateactivity after two revolutions.Installing the Cadence SensorNOTE: If you do not have this sensor, you can skip this task.TIP: Garmin recommends you secure your bike on a stand whileinstalling the sensor.1 Select the band size that fits your crank arm À securely.The band you select should be the smallest one thatstretches across the crank arm.2 On the non-drive side, place and hold the flat side of thecadence sensor on the inside of the crank arm.3 Pull the bands Á around the crank arm, and attach them tothe hooks  on the sensor.4 Rotate the crank arm to check for clearance.The sensor and bands should not contact any part of yourbike or shoe.NOTE: The LED flashes green for five seconds to indicateactivity after two revolutions.5 Take a 15 minute test ride and inspect the sensor and bandsto ensure there is no evidence of damage.About the Speed and Cadence SensorsCadence data from the cadence sensor is always recorded. If nospeed and cadence sensors are paired with the device, GPSdata is used to calculate the speed and distance.Cadence is your rate of pedaling or “spinning” measured by thenumber of revolutions of the crank arm per minute (rpm).Putting On the Heart Rate MonitorNOTE: If you do not have a heart rate monitor, you can skip thistask.You should wear the heart rate monitor directly on your skin, justbelow your sternum. It should be snug enough to stay in placeduring your activity.1 Snap the heart rate monitor module À onto the strap.The Garmin logos on the module and the strap should beright-side up.2 Wet the electrodes Á and the contact patches  on the backof the strap to create a strong connection between your chestand the transmitter.3 Wrap the strap around your chest, and connect the straphook à to the loop Ä.NOTE: The care tag should not fold over.The Garmin logos should be right-side up.4 Bring the device within 3 m (10 ft.) of the heart rate monitor.After you put on the heart rate monitor, it is active and sendingdata.TIP: If the heart rate data is erratic or does not appear, see thetroubleshooting tips (Tips for Erratic Heart Rate Data,page 7).Tips for Erratic Heart Rate DataIf the heart rate data is erratic or does not appear, you can trythese tips.• Reapply water to the electrodes and contact patches (ifapplicable).• Tighten the strap on your chest.• Warm up for 5 to 10 minutes.• Follow the care instructions (Caring for the Heart RateMonitor, page 11).• Wear a cotton shirt or thoroughly wet both sides of the strap.Synthetic fabrics that rub or flap against the heart ratemonitor can create static electricity that interferes with heartrate signals.• Move away from sources that can interfere with your heartrate monitor.Sources of interference may include strong electromagneticfields, some 2.4 GHz wireless sensors, high-voltage powerlines, electric motors, ovens, microwave ovens, 2.4 GHzcordless phones, and wireless LAN access points.Fitness GoalsKnowing your heart rate zones can help you measure andimprove your fitness by understanding and applying theseprinciples.• Your heart rate is a good measure of exercise intensity.• Training in certain heart rate zones can help you improvecardiovascular capacity and strength.Wireless Sensors 7