A measuring device for analyzing a sample liquid having at least one analyte is provided. A test field support housed in the device includes a number of individual test fields in communication with electrochemical measuring cells of the test field support. Reagents can be assigned to the electrochemical measuring cells which can react with a sample liquid. The reaction can lead to a measurable change of at least one quantity characteristic of the presence or concentration of an analyte in the sample. The measuring device includes evaluation electronics. The individual test fields on the test field support are accessible to the user after the measuring device has been opened.