K7168 setup, 8xLTZ1000 test run start after 3 month cold, 3458A rusty friend

CM reference CH6 and CH8
Keithley 7168 8-channel nanovolt scanner + RPI in K7001 chassis scanning voltage across each reference in chain.
HP 3458A measure voltage. Direct sample used as resulting sample.


Reference levels:
var ref_ch1 = 7.07257810;
var ref_ch2 = 7.12982375; // 7168 CH2
var ref_ch3 = 7.13667400; // 7168 CH3
var ref_ch4 = 7.18463169; // 7168 CH4 HP A9
var ref_ch5 = 7.12924886; // 7168 CH5
var ref_ch6 = 7.15743862; // 7168 CH6 CM1
var ref_ch7 = 7.12870023; // 7168 CH7
var ref_ch8 = 7.14148536; // 7168 CH8 CM2

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 :)