R6581T Adjustment Toolkit
A toolkit to dump INL calibration constants of the R6581 DMM and update them to fit a reference DMM's.
How to set up
- Download repository
- 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 to 92 for your DMM and source.
- You can opt to comment out line #63 to 72 if you do not wish to clear your initial coefficients for the first sweep.
- 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.