Without having these resistors calibrated, I don't know if it's in spec or not, but at least it seems it's not jumping like a goat.
Obviously this does not constitute a traceable calibration, but I'd say most of the measurements are consistent with both the resistors and DMM being in spec (note that the 3456A uncertainty at 1 GOhm is very large). Or maybe both have drifted an equal amount
. Other than a traceable calibration, you could try to find someone with a calibrated 6.5+ digit DMM that could measure the resistors for you. Note that for the lower values how much of the leads are included may matter. Resistor manufacturers sometimes specify how far from the case resistance is measured.
I don't know what the linearity of the 3456A is like, but another thing you could do is measure the 100 Ohm resistor at the 100 Ohm and 1 kOhm range, 1 kOhm at 1 kOhm and 10 kOhm, etc. You would need to do the math to see if this would gain you any additional confidence in the linearity of the Ohms range. Anything further, like measuring ratios between the resistors, would get you deeper into metrology.
I was going to do Ohms Performance test but I'm not sure I'm getting it rigth. Please see attachmente. As I understand it, the red marked steps would be done in autorange, then the green ones would be done in manual 100K range?
I don't think it matters. I'd always use manual ranging during calibration, or at least verify it auto-ranged to the correct range for every point (which I'd argue is more effort than just using manual ranging). I guess they specified auto-ranging to speed up the calibration procedure, since back when the manual was written they may not have automated the process.
I hope that this will not upset too many of the Europeans, but I just passed up a Wheatstone Bridge that had a connection for use as a resistance box at a Hamfest for $ 5.
How does this solve the problem of traceability?
Sphere Research is a good company in Canada: https://www.sphere.bc.ca/oldsite/index.html
Sphere has been winding down for a while since Walter died about a year ago.
This is their current website.