Keithley 7 digit high performance multimeter 2001 keithley 2001 p the keithley 2001 is a 7 frac12 digit high performance digital multimeter dmm for users whose applications demand exceptional resolution accuracy and sensitivity combined with high throughput this 7 frac12 digit multimeter not only delivers performance specifications usually associated with instruments that cost thousands more but it also offers a broad range of functions not typically available from dmms p p the