Temperature box test, GPIB code running on DE1SOC + NI GPIB-USB-HS FC

PID settings: KP=270, KI=0.03, KD=0.05, Max TEC voltage = 10.5V, Max TEC Current = 1A, HEL RTD current = 8.333E-4 A

Reference levels:
var ref_k4 = 308684.4;
var ref_k6 = 274409.5;

Result CSV-data

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 :)