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Slide show
Slide show: Blood sugar testing
By Mayo Clinic staff
Code your meter
Some glucose monitors must be coded every time you open a new vial of test strips. Each meter has its own coding technique. Follow the manufacturer's instructions carefully. Be sure to keep the instructions handy for future reference.
Some meters have a code chip — often called a key — that slips into the device. In this image, the code number on the vial of test strips has been entered into the monitor using the button labeled "C."
Some newer monitors don't need coding.
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