The Gossen Metrawatt U2289-V022 digital electric energy meter is a two-phase meter designed for direct DIN rail mounting. It is designed for the measurement of energy content of electrical circuits, electricity meters, and other electronic equipment, as well as for the analyzation of energy consumption levels. It is equipped with a digital display and keypad interface, and supports communication via RS232, RS485, and Modbus protocols. It is also capable of registering overload moments and having an overall maximum load of 100A. The U2289-V022 model also features adjustable tarif switching, equipment data memory, automatic reversal of direction of active energy, power limit monitoring, current harmonic detection, reverse energy direction indication, and voltage transformer (VT) input. The meter includes visual and electrical signal outputs, and is also provided with a non-replaceable, long-lasting, lithium battery for power outage memory backup.