Randy, you're right, nowadays it seems difficult to find those low EMF spade lug cable assemblies. Even Keithley obviously offers no classical ones any more, i.e. spade lugs crimped on each side, shielded, etc. Only special ones for their nV Voltmeters. Although the crimped version, on (oxygen free) copper stranded wire offers lowest EMF, I think that this is necessary for ultra low voltage measurement (nV range) and ultra high precision transfer from a JJ standard only. Ohm measurement can well be handled by Kelvin measurement and EMF compensation, without usage of low EMF cable.. although a good 4 fold cable assembly with surrounding shield would be preferred. I simply use gold plated 4mm banana plugs (SLS4-B = LS 4 + KT-4B, or LK-4B for complete test leads) from the Swiss manufacturer Multi-Contact. On my 3458A, these parts deliver EMF well below 1µV after 1-2 minutes settling time, low contact resistances, and they are mechanically stable. Even after years of usage they show no wearout of the gold plating and no relaxation of the elastic force. They are not suited for higher voltages. By using ordinary HV saftey cables, EMF plays a minor role only. See catalogue p.40, p.73: http://www.multi-contact.com/AcroFiles/Catalogues/TM_Test&Measure_%28de-en-fr%29_hi.pdf A pity, they do not offer those spade lugs anymore. I think that on our metrological (accuracy) level, EMFs firmly around and below 1µV are sufficient. Frank

http://www.tequipment.net/Pomona5295.asp -John ============= > Randy, > > you're right, nowadays it seems difficult to find those low EMF spade > lug cable assemblies. > > Even Keithley obviously offers no classical ones any more, i.e. spade > lugs crimped on each side, shielded, etc. > Only special ones for their nV Voltmeters. > > Although the crimped version, on (oxygen free) copper stranded wire > offers lowest EMF, I think that this is necessary for ultra low voltage > measurement (nV range) and ultra high precision transfer from a JJ > standard only. > > Ohm measurement can well be handled by Kelvin measurement and EMF > compensation, without usage of low EMF cable.. although a good 4 fold > cable assembly with surrounding shield would be preferred. > > > I simply use gold plated 4mm banana plugs (SLS4-B = LS 4 + KT-4B, or > LK-4B for complete test leads) from the Swiss manufacturer Multi-Contact. > > On my 3458A, these parts deliver EMF well below 1µV after 1-2 minutes > settling time, low contact resistances, and they are mechanically > stable. Even after years of usage they show no wearout of the gold > plating and no relaxation of the elastic force. > > They are not suited for higher voltages. By using ordinary HV saftey > cables, EMF plays a minor role only. > > > See catalogue p.40, p.73: > http://www.multi-contact.com/AcroFiles/Catalogues/TM_Test&Measure_%28de-en-fr%29_hi.pdf > > A pity, they do not offer those spade lugs anymore. > > I think that on our metrological (accuracy) level, EMFs firmly around > and below 1µV are sufficient. > > Frank > > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > >