Keithley 2110 series 5 digit dual display usb multimeter keithley 2110 p the keithley 2110 series 5 frac12 digit usb digital multimeter combines compelling pricing with comprehensive capabilities superior measurement accuracy and high speed its dual line display capability allows it to display two different measurements at once p p the meter has 0 012 basic dc voltage accuracy and 0 020 basic resistance accuracy up to the 100k omega range at 5 frac12 digits it delivers up to 200