The system (1) has a consumable material (3) with detection reagents that trigger a detection reaction upon contact with a bodily fluid sample. A handheld device (4) is provided, which has an interface for transmitting supplementary data from the exchangeable data storage unit to the device and for a consumable material identifier stored on the data carrier. A processor is provided to determine insertion of a magazine (2) whether a reliable measurement of an analyte concentration in a bodily fluid sample with consumable material in the inserted magazine combined with the supplementary data.
