The UMD 705 is a compact power quality meter with data logger for DIN rail mounting. It measures 4-phase current and voltage with up to three tariffs in 6-quadrant operation and work in class 0.2s, as well as all usual network sizes, eg harmonics up to the 50th harmonic. Optionally it maps the power quality according to ISO 50160, EN 61000-4-30, EN 61557-12 with the PQ S firmware module. It has a large 512MB memory. The device can be accessed via the Ethernet interface, and the web browser can be used to view live measured values via the web browser. Internet protocols can therefore also be read in and PLC systems and building management systems can be connected easily. Digital inputs / outputs and a serial RS485 interface are integrated. The UMD 705 can also be used as a Modbus master for connecting up to 31 Modbus slaves in network structures. The optional Go firmware module enables power and voltage oscilloscope features and sets trigger events for limit events.