Attributes . Designed by electricians and engineered by Fluke, the Fluke 117 is a compact True-RMS meter for demanding applications like commercial buildings, hospitals, and schools. With its integrated non-contact voltage detection, Auto Volts and LoZ functions that help prevent false readings caused by ghost voltage, the Fluke 117 is a great choice for electricians. In fact, users around the world have said their 117 is an investment in accuracy. The Fluke 117 provides Min/Max/Average readings and measures frequency . Names