Lowell, MA-based Auriga Measurement Systems says it has raised $2.75 million in additional seed funding. The wireless instrumentation and design company delivers test equipment for high-frequency, high-powered RF microwave front-ends. The company did not disclose the names of the participants in the seed round. In 2007 Ohio-based White Oak Partners put $1.5 million into Auriga, whose name is Latin for “charioteer.” Auriga is also a constellation in the northern sky.