Nanovoltmeter Showdown Preview (Patreon)

HP, Keysight, Keithley or DIY? High End Nanovolt Meter Comparison

Find Multimeters and more at https://www.welectron.com/Tischmultimeter More from me https://www.patreon.com/marcoreps 34420A data https://github.com/marcoreps/34420a 2182A data https://github.com/marcoreps/keithley-2182a EM Preamp patent https://patents.google.com/patent/GB2118391A/en Simplified EM Preamp sim https://tinyurl.com/22tqqeha Tetrajunction discussion https://www.eevblog.com/forum/metrology/teardown-standard-resistors/msg909985/#msg909985 00:00 Intro 01:18 Keysight 34420A 01:51 34420A Calibration 03:49 Resolution? 06:08 Shorting plug 07:48 34420A Noise 10:40 34420A overview 12:11 34420A teardown 13:06 JFET preamp 15:30 Connector Thermal EMF 18:05 Resistance bridge 19:48 Keithley 2182A 20:30 2182A Calibration 20:55 2182A Noise 22:35 Noise comparison 23:22 2182A overview 24:44 2182A ACAL & TC 25:13 Input bias current 26:11 2182A teardown 27:43 Keithley 260 nV Source 31:29 Rotary multiplexer update 35:14 Beyond JFET preamps