The method involves inserting a set of test elements in a given order into a blood sugar measuring device (10), and presenting the test elements e.g. test tape chip, successively at a measuring position (26) by operation of a device drive e.g. rotary drive (24). The drive is activated to position the test element in order at the measuring position and determining whether the test element is to be used after a predetermined device actuation. The test element is positioned at the measuring position if the order test element is not usable. An independent claim is also included for an analytical system for patient self-monitoring.
