System for testing electric properties of an object

A tester system comprising

• first areas on which objects to be tested are mounted;
• a first movable alignment section for aligning objects to be tested;
• first and second tester means each having terminals electrically connected to each object and serving to test electric properties of each object to be tested, while electrically contacting its terminals with each object;
• a second movable alignment section for aligning the objects after they have been tested;
• second areas on which the objects are mounted after they have been tested;
• a loader for transferring a predetermined number of objects from the first areas to the first alignment section;
• a first carrier mechanism for holding the predetermined number of objects aligned on the first alignment section and transferring them to the first tester means, electrically and individually connecting the object thus transferred to the terminals of the first tester means, and transferring the objects to the second alignment section after the testing of all objects held is finished;
• a second carrier mechanism for holding the predetermined number of objects aligned on the first alignment section and transferring them to the second tester means electrically and individually connecting the object thus transferred to the terminals of the second tester means, and transferring the objects to the second alignment section after the testing of all objects held is finished;
• an unloader for transferring the predetermined number of tested objects aligned on the second alignment section to the second areas;
• and
• control means for controlling the first and second carrier mechanisms.