Patent ID: 7859248

Claim:
A method of setting an optimum pushing condition for a contact arm pushing a device under test (DUT) against a socket, the method comprising: (i) instructing a control device of the contact arm on a magnitude of torque of a motor of the contact arm; (ii) pushing the DUT against the socket by the contact arm according to the instructed torque; (iii) testing the DUT and identifying one of a normal test result and an abnormal test result from the testing of the DUT; and (iv) increasing the magnitude of torque when the abnormal test result is identified at the (iii), wherein the (i)-(iv) are repeated until the normal test result is identified at the (iii), and a pushing condition of the contact arm at the time of the normal test result is set as the optimum pushing condition if the normal test result is identified at the (iii), wherein when the (iv) has been executed more than a predetermined number of times, the method is discontinued and the fact that the method is discontinued is alerted.