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1. Place the Health-O-Meter scale on a flat surface. Make sure the scale is indeed level.
   
2. Tap the lower left or right corner of the scale three times. After you do this, you'll notice the display shows "---."
   
3. Wait a few seconds for the scale to reset and recalibrate. When it's ready for use, it will display "LB" or "KG," depending on your display selection.