The UMD 97 is a powerful frontal mounting instrument. It measures 3-phase current and voltage in 6-quadrant operation in class 0.2 and thus the work in class 0.5s as well as all usual network sizes, eg harmonics up to the 50th harmonic. It can be measured via current transformers with N / 5A and N / 1A or via Rogowski coils (333mV). It reproduces the power quality according to ISO 50160, EN 61000-4-30, EN 61557-12, EN 62053-22. It has a brilliant large color graphics display and is conveniently operated via five function keys. Internally a PT100 sensor is integrated. It can be used in both 400V, 690V and IT networks. It has a large 512MB memory. The device can be accessed via the Ethernet interface and the front mini-USB port. Internet protocols can therefore also be read in and SPS and building management systems can easily be connected. Digital inputs / outputs and a 485 serial interface are also integrated. For network analysis, the measuring device can be extended by the firmware modules PQ S and GQ. The display is parameterised or visualized with the ENVIS software.