The TOS9200 Series has been developed to meet a wide diversity of customer needs. Including the refinement and enforcement of Kikusui’s former Series, its specifications reflect the results of detailed study of our large database of user’s requirements including special orders and modifying specifications. The TOS9200 Series consists of four products the testers TOS9200 and TOS9201, and the high-voltage scanners TOS9221 and TOS9220. The TOS9200 is equipped with AC withstanding voltage and insulation resistance testing functions, while the TOS9201 has a DC hipot testing function in addition to these two functions. The power block, a core component, employs a high-efficiency switching power supply and a switching amplifier based on PWM systems. These features realize high power and enhanced stability, as well as reducing the size and weight of the unit. When combined with the earth continuity tester TOS6200, the TOS9200 Series integrates three or four types of tests in a single process. Furthermore, when used together with the high-voltage scanner TOS9220/9221 (equipped with a contact check function), the tester is capable of automatically checking test points for up to 16 channels, thereby facilitating a safe, reliable automatic testing system.