The Series 3700 instruments offer scalable, instrument grade switching and multi-channel measurement solutions that are optimized for automated testing of electronic products and Components The Series 3700 includes four versions of the Model 3706 system Switch mainframe along with a growing family of Plug-In Switch and control cards. When the Model 3706 mainframe is ordered with the high performance multimeter, you receive a tightly integrated Switch and measurement system that can meet the demanding application requirements in a functional test system or provide the flexibility needed in stand-alone data acquisition and measurement applications.