ELECTRICAL APPARATUS

摘要

The present invention relates to an instrument (20) for determining the concentration of a medically significant component of a sample. The instrument includes a controller (110), at least one key (54a, 54b, 54c) for the entry of information by a user, and a display (42) for displaying results of tests to determine the concentration of the medically significant component of a sample. The controller (110) is coupled to the at least one key (54a,54b,54c) and to the display (42) to permit the user to enter into the controller (110) a first user-defined range of values for the concentration of the medically significant component of the sample. The display (42) displays the first user-defined range, and the controller (110) produces an indication during a subsequent determination of the concentration whether the subsequently determined concentration falls within the first user-defined range.