Apple Nike + iPod User Manual

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A message lets you know if the calibration was successful. If you want to calibrate for 
both running and walking, repeat steps 1–5.
Note:  Even after calibrating, the accuracy of the distance measurements may vary 
depending on gait, running surface, incline, and temperature.
Using iPhone 3GS, iPhone 4, or iPod touch, you can calibrate Nike + iPod using the 
workout you just finished. You can only calibrate workouts that are a distance of a 
quarter mile or more. 
To calibrate iPhone 3GS, iPhone 4, or iPod touch using your latest completed 
workout:
 
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Tap End Workout, then tap Calibrate. Set the correct distance you ran or walked and  
tap Done.
The device updates with the new calibration to override the previous one for a walking 
or running pace.
To reset Nike + iPod calibration to the default setting:
 
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iPod nano (5th generation or earlier):  Choose Nike + iPod > Settings > Sensor > 
Calibrate > Reset Walk (or Reset Run).
 
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iPod nano (6th generation):  Choose  Settings > Nike + iPod > Sensor > Calibrate > Reset 
Walk (or Reset Run) > Reset.
 
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iPhone 3GS, iPhone 4, and iPod touch:  Choose Settings > Nike + iPod, then tap Reset 
Calibration.