The Associated Research 4048A is a combination Electro-Static-Discharge (ESD) tester and AC Dielectric Withstand (Hypot®) Tester. It serves as a field maintenance tool, a Q.C. tool, as well as an R and D tool. Its ESD capabilities is well suited for evaluating electronic equipment, particularly computer equipment, for susceptibility to static electricity. As an AC Hypot, dielectric withstand (overvoltage) tests can be performed to check integrity of the electrical insulation system. Input: 115 V, 50/60 Hz . Output: Continuously adjustable from zero to 5 kV DC with a maximum energy level of 64 millijoules for Electro-static Discharge testing (2 miliamperes maximum current at maximum DC test voltage).