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• 09:43, 19 May 2024 Peter talk contribs created page Keithley 485 (Created page with "{{Instrument Sidebar |manufacturer=Keithley |model=485 |class= |series= |summary=Picoamperemeter |image=Keithley 485 front.jpg |caption=Keithley 485 front |introduced=(?) |discontinued=(?) |designers= |manuals= * ''please add'' }} The '''Keithley 485 Picoamperemeter''' is a dedicated picoamperemeter from the mid-1980s, from the same generation and model series as the better-known Keithley 197 "Microvolt DMM". The 485 operates as a feedback (transimpedance) ampereme...")