Abstract: A holiday detector system can include a holiday detector with a housing for holiday inspection circuitry to perform holiday inspection on a surface, a probe extending from the housing for surface inspection, the probe electrically coupled to the holiday inspection circuitry. The holiday detector system can also include a graphical user interface device electrically connected to the holiday detector. The graphical user interface device has a display screen and logic and circuitry to receive holiday inspection signals from the holiday detector apparatus; generate digital data representative of the holiday inspection signals; format the digital data into a graphical representation of the holiday inspection signals; display the graphical representation of the holiday inspection signals on the display screen; and digitally store the digital data in a data storage device.