Lifescan SureStep Blood Glucose Monitor Operator's Manual page 29

Match the code numbers.
2
The code number on the test strip bottle
will range from 1 to 21. If the number on
the display matches the code number on the
test strip bottle, begin testing. If the two
code numbers do not match, follow step 3
to code the meter.
Code numbers do not match.
If the code numbers do not match, code
3
the meter.
After the code symbol appears, press and
release the green C button. The code symbol
will flash. Press and hold the C button until
O p e r a t i o n 19