## R6581T Adjustment Toolkit
A toolkit to dump INL calibration constants of the R6581 DMM and update them to fit a reference DMM's.
 ![alt text](/resources/INLCOEFF.png)

# How to set up 
1. Download repository
2. Open Hosei.py and adjust the following for your setup:
    - libraries (uses a pyvisa compliant alternative for USB-CDC GPIB adapter)
    - lines #19-21 for the GPIB adresses
    - lines #36-42 for your voltage source configuration
    - lines #43-54 for your reference dmm configurations
    - the measurement functions from lines #74-92 for your DMM and source.
3. You can opt to comment out line #63-72 if you do not wish to clear your initial coefficients for the first sweep.
4. Run and wait

There are some basic pareametersd also like nrepeats, which defines the amount of INL sweeps to be averaged.
Note that this is a tradeoff of thermal effects against DMM noise

Typically with Datron 4805 and 3458A I get within +-0.1 uV/V of the reference DMM (3458A) on an average correction fit.