Keithley 2000 e 6 digit high performance digital multimeter dmm keithley 2000 e p the keithley 2000 e is a 6 frac12 digit high performance digital multimeter dmm the high speed low noise and a d converter technology makes this a fast accurate and highly stable instrument that is easy to operate p p the multimeter combines broad measurement ranges with superior accuracy specifications dc voltage from 100nv to 1kv with 0 002 90 day basic accuracy and dc resistance from 100 95