The Digital Multimeter/Function Generator, designed as a general-purpose instrumentation module, provides the necessary test equipment (except oscilloscope) to perform the lessons in the FACET® program. This instrument consists of a sine/square/triangle waveshape function generator and an auto-ranging digital multimeter. The instrumentation shares a common power input and is housed in a portable enclosure. All components, switches, and terminals are mounted in a tamper-resistant manner. The system’s design protects the instruments from inadvertent short circuits and overloads within the FACET® system.