Hi M K, Sorry about that, I have posted a new thread on EEVBLOG with added photos. http://www.eevblog.com/forum/projects/diy-low-thermal-emf-switchscanner-for-comparisons-of-voltage-and-resistor-stand/
lymex/bg2vo >-----邮件原件----- >发件人: volt-nuts [mailto:[email protected]] 代表 M K >发送时间: 2015年2月13日 14:45 >收件人: [email protected] >主题: Re: [volt-nuts] Calibration of voltage standards >On 13/02/2015 01:40, 张利民 wrote: >> 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? >Hi Lymex, > >Great idea. I will have to spend some time looking over the google >translate version of your text, as unfortunately it seems that here in >the United Kingdom we cannot see any in line images from 38hot. I guess >I would have to sign up to see them? And even the video of your box >would not stream for me. > > >_______________________________________________ >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.
