Hey
thank you
I think it was in here , I saw one opened Leeds&Northrup and showed series 2 Ohms or so resistor who's there for adjusting the resistor ,
I used fluke 742A's , I know they arent 1.000000 , hence the calibration data . on the papers you see 1,000.01822 Ohm or so .. then you enter the data you the meter you are calibrating (or) adjusting .
what I meant with adjusting is in case the actual value is 70~90ppm under or above , that is above the usual 20ppm I use to see on good ones ,
before adjusting suck A device , it is way better to send it to proper NIST certified lab and see the actual value they measured , plus uncertainty in order to see if it was mistake of measuring the resistor or simply drift of both the standard I've used in order to determine the actual value of unknown value standard ( let's say I pass 1mA or so . via good CC source or say fluke 5XXX calibrator , through fluke 742A(1K) and say old Leeds&Northrup one , I then connect each one to ratio capable meter ( is HP34401A good enough ? Keithley 2700 ? ) and perhaps average the result and I am going to get something near the value , right ?
Anyhow , thank you for the confidant of buying those resistors
P,s: Does anyone know the max power *That will not * harm the Leeds&Northrup ? and the Honeywell Rubicon ?