Roche Accu-Chek Performa Manuel De L'utilisateur page 94

Troubleshooting Checks
8. Check if the code number on the meter
display matches the code number on
the test strip container.
9. If you are still unsure of the problem...
92
Action
If they do not match, insert the correct
code chip into the meter and test again.
Repeat the control test with a new test
strip. If you still have problems, call
Roche.