(EU) Free resistance calibrations (plus other metrology testing)

[FFY00]

Hey everyone,

In the beginning of the year I bought a SR104 (S/N 734010), it was calibrated in May by TiN, I then picked it up in person, and hand-carried back to Portugal. You can check the writeup about the calibration in TiN's SR104 article on xDevs.

Since I share the same love for metrology and want to help my fellow volt-nuts, I am offering free resistance calibrations to anyone, you just need to cover the shipping costs. I am based in Portugal, so this would make the most sense for people in the EU, but the offer is open to anyone really.
Regarding the calibration ranges, 10k would yield the best uncertainty, but I also own an ESI 242D (likely an early SP3632, specifically the unit from this thread), and an ESI SR1010-10k + PC101 + SPC102 (unfortunately not a SB103 set, but that's emulated with raw copper wire), so other resistance standard values should also be doable, but limited to the uncertainty permitted by the equipment (refer to the 242D and SR1010 manuals).

Additionally, I have two 732As (S/N 5170004 + 5195001), one of which I am planning to get calibrated against a JVS in the start of next year, probably, then transfer the calibration to the 2nd unit using an HP 34420A (S/N US34000588), so I should also be able to offer voltage calibrations later.
That said, even though I can't offer voltage standard calibrations, I should be able to perform voltage standard stability tests right now, if anyone is interested — I have four 8.5 meters*, which I rotate monitoring the 732As, so I have enough flexibility to add a 3rd voltage standard to the rotation.

Something else that could also maybe be interesting is INL analysis. Even though none of my meters have been compared against a JVS for INL, we have data comparing my 3458A against some of Marco Reps' meters (https://github.com/marcoreps/multiinstrumentalist/tree/master/csv), my Prema 6048 against some of Branadic's meters (see https://www.eevblog.com/forum/metrology/prema-6048-teardown/, a xDevs article should also be coming soon), and that still leaves me with two other meters and an ESI RV722 to compare against, which I believe it's enough data to draw some conclusions with a reasonable amount of confidence.

I also have some more equipment, so if there's anything else you're wondering if is possible, feel free to reach out.
I'm happy to support anyone working on open-access science, even outside electro-metrology (other areas I am interested in / working on: semiconductor manufacturing, optical microscopy, SEM, high vacuum, nuclear physics, gamma spectroscopy, raman spectroscopy, x-ray inspection, optics, etc.)

You can reach out via PM, but the preferred method would be via email to lains@riseup.net (see https://github.com/FFY00 for more info about my contacts).
I should also be reachable on the xDevs IRC.

* 8.5 meters: HP 3458A (S/N 2823A01948), Prema 6048 (S/N 1186, specifically the white unit referenced in branadic's thread), Solartron 7071 (S/N 100708, modded to 8.5), and an Advantest R6581T (S/N 562300360).

Cheers,
Filipe Laíns