Keithley 2700 7700 6 digit multimeterswitch system integra series keithley 27007700e the keithley 2700e is a 6frac12 digit multimeterswitch system from the integra series this dmm is supplied with the keithley 7700 differential multiplexer making it a high performance compact affordable and easy to use packagethe 2700e consists of a mainframe with two slots for plug in modules each slot can support multiplexer matrix or control modules and all the modules in a system operat