VPG BMF set TCR test 9, GPIB code running on DE1-SOC, Ramp up

TC 3458 (VPG VPR5 1R #3) : α = +3.4 ppm/K, β = ppm/K
TC 2002-4 (Soviet S5-61 11.1K spec 5ppm) : -0.6ppm/K (20>26C), -0.68ppm/K (20>30C), -0.92ppm/K (20->40C)
TC 2002-6 (VPG VPR5 1R #4) : +10 ppm/K


Result CSV-data from HP 3458A

Workflow:

* RPI accesses DMMs via GPIB and reads data.
* Data is formatted by python script into DSV string and written/append to file on FTP
* DSV-file is visible publicly on https://xdevs.com/datashort/
* Page http://xdevs.com/datalog_mm/ runs D3.js javascript library to read DSV file test.log to input data
* D3.js plots SVG graph online :)