VPG BMF set TCR test 15, GPIB code running on DE1-SOC, Ramp up

TC 3458A (15K RIEDON) : +0.04 ppm/K
TC 3458B (500K USF340) : +0.78 ppm/K
TC 2002-4 (VPG VPR221Z 1 Ω 1% spec 2.6ppm) : -0.86 ... -1.6 ppm/K
TC 2002-6 (PTF56 15ppm spec, 75K #1) : -7.06 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 :)