Vibrating capacitor non contact field probe in feedback loop to create a voltage follower:
https://www.monroe-electronics.com/ESD/pdf/244a_m.pdf Bruce > > On 23 March 2018 at 15:12 Neville Michie <namic...@gmail.com> wrote: > > Improvise by holding a metal disk over an electronic balance and > measuring the force of attraction. > Calibrate it with a lower known voltage. > > cheers, > Neville Michie > > > > > > On 23 Mar 2018, at 12:58, Dr. David Kirkby > > <drkir...@kirkbymicrowave.co.uk> wrote: > > > > On 23 March 2018 at 01:49, kc9ieq via volt-nuts > > <volt-nuts@febo.com> wrote: > > > > > > > > > > How about using (or building) an additional 2kV power supply > > > and a > > > sensitive meter movement like a differential voltmeter, > > > adjusting > > > for/measuring the null? Impedance at null will be > > > theoretically infinate, > > > current will be theoretically zero, and you can > > > measure/monitor the voltage > > > of your second supply directly with the probe/meter of your > > > choice. > > > Regards,Chris > > > > > > > > > > No, that will not work for me, as while the impedance at null is > > infinite, > > it is not when not nulled, and that will mess up the measurements. > > > > Absolute accuracy is not important. +/- 10% or even 20% would be > > okay. I > > want to measure a couple of voltages and compare them. As long as > > the meter > > reads the same with identical input voltages, that is fine. > > > > Dave > > > > _______________________________________________ > > 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. > > > > > > _______________________________________________ > 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. > _______________________________________________ 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.
