The UMD 705 is a compact power quality measurement device with a data logger designed for mounting on DIN rails. It measures three-phase current and voltage with up to three tariffs in a four-quadrant operation and operates in class 0.2s. It captures all common network parameters, such as harmonics up to the 50th. Optionally, it can represent power quality according to EN 61000-2-2, EN 61000-2-4, and EN 61000-2-12 with the PQ S firmware module. It features a large 512 MB memory. Access to the device is possible via the Ethernet interface, and live measurement values can be viewed through the associated web server using a web browser. This also allows for the reading of Internet protocols, making it easy to connect PLC and building management systems. Integrated digital inputs/outputs and a serial RS485 interface are included. The UMD 705 can also be used as a Modbus master to connect up to 31 Modbus slaves in network structures. With the optional GO firmware module, oscilloscope functions for current and voltage are activated, and trigger signals for limit events can be configured.