When a test cassette is in the meter, the meter checks when the cassette was inserted and calculates the use-by period from this. Each test cassette must be used up within 3 months (used-by period). If you insert a standard test cassette into the meter, the use-by period is calculated from the date when the cassette was placed in the meter for the first time. This date is stored in the cassette.
The meter also checks whether the expiry date of the cassette has been reached. The expiry date is shown on the test cassette box.
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.
If you start a test and the validity of the cassette is about to expire shortly or has already expired, the meter will inform you of this.
The first notification appears 10 days before the validity of the cassette expires, the following appear 5, 2 and 1 day(s) before expiry.
If the validity of the test cassette has expired, a message appears which informs about the expiry of the cassette and asks you to insert a new cassette.