The Instek GPT9601 Electrical Safety/Withstanding Voltage/Hi-Pot Tester, 100VA AC is built upon a platform of 100VA AC maximum power output. The GPT-9601 is able to perform an AC withstanding test. The GPT-9600 Series is equipped with the high-efficiency PWM amplifier, which is the core of the platform design to impede the influence from the input AC voltage fluctuation and ensure a stable voltage output. Following a tidy and easy-to–use design concept, the GPT9601 renders users an intuitive operation environment by a simple and clear panel layout, a large LCD display and color LED indicators. The switching power supply, used as a universal input source, accommodates the power systems in most countries in the world. Unlike other members of GW Instek Safety Testers, the GPT 9601 uses a pre-set output voltage bar to indicate the expected output voltage for withstanding voltage tests instead of the traditional AC slide operation and indication. Other functions and features of the GPT-9601 include: the zero crossing turn-on operation protects DUT from the impact of surge voltage output, the interlock function safeguards users from the hazardous shock of unintentional touch of the voltage output, a remote output on-off terminal in the front panel and a signal I/O port in the rear panel are provided as the means for remote start/stop control of the safety tester.