Garmin Forerunner 50 Owner's Manual - Page 40

Appendix Problem The heart rate data is inaccurate or erratic. Solution/Answer • Make sure the heart rate monitor is snug against your body. • Warm up for 5-10 minutes. If the problem persists, continue with the following suggestions. • Reapply moisture to the sensors. Use water, saliva, or electrode gel. Clean the sensors. Dirt and sweat residue on the sensor can interfere with heart rate signals. • Synthetic fabrics that rub or flap against the heart rate monitor can create static electricity that interferes with heart rate signals. Wear a cotton shirt or wet your shirt if suitable for your activity. • Position the heart rate monitor on your back instead of your chest. • Strong electromagnetic fields and some 2.4 GHz wireless sensors can interfere with your heart rate monitor. Sources of interference may include very high voltage power lines, electric motors, microwave ovens, 2.4 GHz cordless phones, and wireless LAN access points. After you move away from the source of interference, your heart rate data should return to normal. 34 Forerunner 50 Owner's Manual