Discussion of precise voltage measurement
Manuals here:
http://www.keysight.com/en/pd-4338A%3Aepsg%3Apro-pn-4338A/milliohmmeter?pm=PL&nid=-536900197.536897596&cc=US&lc=eng
Does R, X, L and phase.
$500 OBO, plus shipping/insurance.
Joe Gray W5JG