Electronics > Metrology

Nanovolt design challenge - build and show your own nV-meter in 256 days

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coppercone2:
too much work. good NVA have a differential/single ended switch and a ground lift switch typically.

if you want the standard features you are going to need to figure out good switch setups. I imagined the front panel and I am already tired

and a good 'prize' that might make this worthwhile could be one of those fancy LTZ1000 boards, you know, so you have something to test, fully assembled with a known good reference.

1audio:
I just acquired a Keithley 148 Nanovoltmeter. I have found some really useful info on how hard it is to make these. When you are measuring voltages 20 dB below any thermoelectric effects its going to be all technique to make something useful. Some references with useful info:

https://elektrotanya.com/keithley_148_measurement-of-nanovolts_nanovolt-mero_sm.pdf/download.html   A real primer on technique.

Surprisingly Tek has OK scans of the manuals for these vintage instruments. The manuals actually have a lot of useful detail, since there were from a period where mfr's shared how the instruments work.
https://www.tek.com/manual/keithley-model-147-nanovolt-null-detector-instruction-manual-rev
https://de.tek.com/manual/model-148-nanovoltmeter-instruction-manual-29029-rev

The two instruments are very similar but the 147 has a writeup on interfacing with L&N etc. precision potentiometers.

egonotto:
Hello,

is someone working on this Nanovolt Challenge?

Best regards
egonotto

MegaVolt:
The end of the competition on May 17?

TiN:
MegaVolt
Yes, that's the idea.

egonotto
I haven't heard anything from anyone so far. You can be first  :-/O

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