Dear Ken Peek, I designed a powerless automatic 2*4 low thermal EMF switch for 3458A, 34401A and 34420A(works also on my R6581T and 1281). It performs great and I use it as my main comparison tool for 10V and 10k standards. http://bbs.38hot.net/thread-1186-1-1.html lymex/bg2vo
>-----邮件原件----- >发件人: volt-nuts [mailto:[email protected]] 代表 Ken Peek >发送时间: 2015年2月12日 1:35 >收件人: [email protected] >主题: Re: [volt-nuts] Calibration of voltage standards > >I forgot to mention that I also own a PPM Inc. Model AVM-100 null meter. >Works great on AC but I need to replace the NiCd batteries for it to >work on batteries. It has a 1uV scale, and it is a bit noisy on that >scale. I intend to modify it to get batter 1/f noise specs on the 1uV >scale. > >Does anyone know where I can get [or how to make] a low-thermal-EMF >switch [or relay]? This would need to be a DPDT type to be able to >reverse the connection to the meter. Ideas? > >_______________________________________________ >volt-nuts mailing list -- [email protected] >To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
