User's Manual C - Accu-Chek

2Initial steps before testingValidity of the test cassetteWhen a test cassette is in the meter, the meter checksregularly when the cassette was inserted and calculatesthe use-by period from this. each test cassettemust be used up within 3 months (use-by period). Ifyou insert a partly used test cassette into the meter,the use-by period is calculated from the date when thecassette was placed in the meter for the first time. Thisdate is stored in the cassette.The meter also checks whether the expiry date of thecassette has been reached. The expiry date is shownon the box of the test cassette and on the lid film of thefoil-sealed packaging next to the symbol .If either of the two dates – use-by period or expiry date– is exceeded, the validity of the cassette has expired.you cannot perform any more tests with this test cassette.46