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

TC 3458 (MZNRE1801 network 5-last) : α = +2.75 ppm/K, β = x ppm/K
TC 2002-4 (Fluke WW 146530 40K) : -0.3 ppm/K from 20C to 30C, -0.95 ppm/K from 30 to 40C, Ramp down???
TC 2002-6 (HP 3458A A1 Vishay 301358 300R 0.5% A1R307) : -0.15 ppm/K from 20 to 30C, +0.15 ppm/K from 30 to 40C. Ramp down???


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 :)