Appendix

Problem

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

The heart rate data is

rate signals. Wear a cotton shirt or wet your shirt if suitable

for your activity.

inaccurate or erratic.

• 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