The VF-Voltage Hold on Failure Option activates when a Leakage Current Failure or a Dielectric Withstand Failure is encountered. The last reading showing on the voltage meter is held for viewing. The voltage reading will continue to be displayed until the RESET button on the front panel fo the hipot tester is pressed. Once the RESET button is pressed, the meter reading returns to zero and the hipot tester is ready for the next test.