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34 Forerunner 50 Owner’s Manual
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Problem Solution/Answer
The heart rate data is
inaccurate or erratic.
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.
Syntheticfabricsthatruborapagainsttheheartrate
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.
Strongelectromagneticeldsandsome2.4GHzwireless
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.
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