Yes, these are faithful reasoning. A good multimeter will calculate the amendment when you tell him what is actually equal to this artifact.
Thank you!
Now i have another question, which may be very silly.
If I recieve the DMM right after calibration and measure a very stable resistor like a 10k 0.01% vishay bulk foil, can I use the calibration data and the reading for that resistor to actually adjust the DMM?
Say, i try to measure the Vishay resistor and the reading is 9.999,96. According to what i said before I can adjust this value by diving it for the coefficient I found through the calibration report, so the new accurate value will be 9.999,10 ohms.
Now I have an accurate value and I know the dmm hasn't drifted because I am using it right after calibration.
I could now adjust the DMM telling it that the value it should read is 9.999,10 ohms, so i now have an adjusted dmm with maximum accuracy and I don't need to adjust all the readings manually.
Of course we must take in consideration the uncertainty of the calibration but for now just assume that the calibration uncertainty is much lower than that of the DMM, right now i just want to understand if my reasoning is correct.
I'm asking all of this because here in Italy it's literally impossible finding someone who calibrates intruments for hobbysts, let alone adjust them, so i'm really desperate for some method to do this all by myself.
I may only have a 6 1/2 DMM for now, but I crave accuracy, and already saving for a 7 1/2 DMM