| 摘要 |
System for analyzing sample liquids by evaluating test elements with an analytical unit ( 20 ) in which a test element ( 10 ) to be analyzed is positioned by a holder ( 21, 22, 120, 140 ) in an analytical position relative to the analytical unit and the system additionally comprises a position control unit to check whether an analytical area of the test element is correctly positioned relative to the analytical unit wherein the position control unit comprises a light source ( 30, 2 ) to irradiate an area of the test element and preferably the analytical area ( 11 ), a detector ( 31, 131 ) to detect light reflected from the area and an evaluation unit, and the light source and detector are positioned relative to one another in such a manner that the light intensity of specularly reflected radiation at the detector when the test element is correctly positioned is different from a light intensity when it is incorrectly positioned and the evaluation unit recognizes any faulty positioning on the basis of the light intensity at the detector. In addition the invention concerns a method for sample analysis using a position control unit to check whether a test element is correctly positioned relative to an evaluation optics.
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