KEITHLEY 614 PROGRAMMABLE ELECTROMETER. Power tested, works fine.
Keithley 6512 Programmable Electrometer Ultra-Low Current Voltage GPIB Lab Test
The 6512 is prized for itswide dynamic range, low noise floor, IEEE-488 programmability, and rugged Keithley build quality — and its long service life makes it a smart pickup on the secondary market.
