The Quadtech Sentry 10 Plus AC Hipot Tester (CE Mark) performs AC dielectric withstand (hipot) tests. The test voltage is programmable from 50V to 5kV AC with a resolution of 1V. The current range is 1A to 20mA. Program & Display Ground Continuity: The Sentry Plus Series can measure and display the resistance between the ground blade of the power cord and any exposed metal on the product. Upgradeable: With the Sentry Plus Series, it is possible to add DC and/or IR test capability without purchasing a new instrument. The Sentry 10 Plus can be upgraded to a Sentry 20 or 30 Plus and the Sentry 20 Plus can be upgraded to a Sentry 30 Plus. Meets UL Hipot Tester Requirements: The Sentry Plus instruments measure & display the output voltage directly at the output terminals. The instruments have both visual and audible failure indications, and after a failure the STOP switch must be pressed prior to another measurement.