A test system for measuring the concentration of an analyte in a biological fluid sample comprises: a plurality of test members (16) in a container (10), each test member (16) including reagent means for indicating the catalytic activity of an enzyme when in the presence of a biological fluid containing an analyte acted upon by the enzyme; 0 a test meter (2) for receiving a test member (16), the meter (2) having circuitry for performing a measurement on a test member received therein to produce a measured physical value, means for determining an analyte concentration value for a specified biological fluid from said measured physical value, and means (4) for indicating a determined analyte concentration value; a Container RFID tag (14) associated with the container (10) which includes data specific to said plurality of test members (16);; and a Patient RFID tag (28) which includes data specific to a patient; and wherein said test meter (2) includes means for reading and storing data from said Container RFID tag (14) and from said Patient RFID tag (28).