KEITHLEY 177 DMM U1

This is a KEITHLEY 177 Microvolt DMM from approximately 1978. It is a 4 & 1/2 digit DMM (meaning 4 to 5 active digits) that will measure DC voltage from 20 millivolt full scale to 1200 v full scale in 6 ranges, AC voltage from 200 millivolts FS to 1000v FS in 5 ranges, DC Amps from 20 microamps to 2 amps in 6 ranges, AC Amps from 200 microamps to 2 amps in 5 ranges and resistance from 20 ohm FS to 20 Megohms FS in 6 ranges. It has extremely large and bright LED readouts, that can easily be read across the room!



The unit was repaired, cleaned, lubricated, calibrated and performance tested on this video. The results are very satisfying.