Mean measurement messAfter keying in all measurement data of my resistor boxes I won't hide the dubious measurement outcome.
Fellow conference voltnuts, it's up to you to determine adjustment values.
Guess the huge uncertainty given the wide range of measurement outcomes!
The resistor boxes were made on the last days before Maker Fair 2018. With the still uncorrected failure of Edwin Pettis to deliver 10k+-10ppm in precision wire wound and Vishay to deliver foil resistors in time as promissed I desperately put together what I had available in stock. That kind of last moment assembly allowed for a settling time of 24-48 hours which seems to be too short I assume.
Column D shows the resistor values as measured on the Maker Fair on a freshly calibrated 3458A as an average measurement for a total of 1 minute measurement time.
Settings were made as recommended to me by Dr. Frank (Thanks!).
Column F reflects internal temperature by measuring a built-in KTY81-110 where 1000 Ohm equals 25 degrees Celsius and 8 Ohm change translates into roughly 1 Kelvin difference in temperature.
The orange area contains my measurements during the conference.
The conference temperature does not differ more than 1 Kelvin from the Maker Fair.
I gave the boxes to two fellow voltnuts with their 3458As. One 3458A was freshly calibrated (during the conference)?
The fellow voltnuts did not measure the KTY81-110 as well unfortunately.
Please juge for yourself.
What I do not understand is the big inconsistency between the aforementioned ESI SR1010 and Frank's VHP on one side and the 3458As on the other side.
My resistor boxes are equipped with sense connectors for each individual resistor.