Professional wire tester 8761, provides three different points 64, 128, and 256 points. The number of test profiles reaches more than 500 groups, and the measurement circuit adopts a true 4-wire design. The on-resistance accuracy is 10 times higher than that of the 8750, which avoids the resistance caused by the adapter wire and makes the on-resistance measurement more accurate. In order to achieve the on-resistance resolution of 1mΩ, multiple filtering lines are used in the power supply processing to reduce the ripple generated by 10 times, and reduce the thermal energy consumption and external power supply interference, which improves the stability of the machine measurement.