Performing a control test lets the user know the meter and test strips are working properly. Perform a control test when:

• You open a new test strip box
• You left the test strip container open
• You think the test strips are damaged
• You want to check the meter and test strips
• The test strips were stored in extreme temperatures, humidity, or both
• You dropped the meter
• Your test result does not match how you feel
• You want to check if you are performing the test correctly