Accuracy
Heart Rate
For a more accurate heart-rate reading:
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Wear your Fitbit device on top of your wrist, and make sure
the back of the device is in contact with your skin.
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When you’re not exercising, wear your device a finger’s
width above your wrist bone.
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During exercise, wear your device a bit tighter and higher for
an improved fit.
Consumer Electronics Service Guide
Steps
If you feel that your step count and
distance are inaccurate, confirm the
following are correct in the Fitbit app:
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Your wrist settings
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Your height
Floors
Your device is designed to detect pressure
changes based on elevation gain, but other
types of pressure changes—such as a gust
of wind, a weather change, or opening a
door—can occasionally cause your device
to register extra floors. Your device
registers 1 floor when you climb about 10
feet.
GPS
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Try loosening the band 1 notch.
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Note that if you’re using GPS for the first time in an area,
connecting to GPS satellites might take several minutes.
Heavily wooded areas and tall buildings can increase the
time it takes to connect to GPSsatellites.
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If GPS didn’t connect the first time, wait 5 minutes before
you start the exercise again.
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(Charge 4 and Charge 5) If your tracker doesn’t connect to
GPS satellites, end the exercise, change the GPS mode to
Phone GPS, and start the exercise again.
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To reduce the time it takes for your device to connect to
GPS satellites, hold your arm parallel to your body near
your head and at least 2 inches away from you when you
connect to GPS and start an exercise.