Keithley 6517b e 5 digit digital multimeter dmm keithley 6517b e p the keithley 6517b e is a 5 frac12 digit digital multimeter dmm that offers accuracy and sensitivity specifications unmatched by any other meter of this type it also offers a variety of features that simplifies measuring high resistances and the resistivity of insulating materials with reading rates of up to 425 readings second the 6517b is also significantly faster than competitive electrometers so it offers a quick