The sample testing machine is intended for testing samples stored in test cards.

FIG. 1 is a perspective view of the design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view of the machine as seen from the right hand side of the machine in FIG. 2;

FIG. 4 is a side elevational view of the machine as seen from the left hand side of the machine in FIG. 2; and,

FIG. 5 is a top plan view thereof.

The rear and bottom sides of the machine are not ornamented.

The phantom lines shown in the figures are for illustrative purposes only and form no part of the claimed design.