DMM test with constant 24.000C DUT temps

2 modules temperature box test, GPIB code running on Raspberry Pi 3 + NI GPIB-USB-HS FC

3458's TCV 10V Result = <0.05 ppm/K

Powered by K2400 at 15.00VDC Icmpl=105mA,
Irunning = 28.5mA at 20C
Irunning = 24.4mA at 46C
Irunning = 23.7mA at 50C
PID settings: KP=140, KI=0.2, KD=1.2, Max TEC voltage = 10.5V, Max TEC Current = 1A, YSI 44006 current = 100E-6 A

Reference levels:
LTZ1000A Module 1 REF = 7.129237284 VDC;
LTZ1000A Module 2 REF = 7.128709302 VDC;

Result CSV-data


* 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
* Page runs D3.js javascript library to read DSV file test.log to input data
* D3.js plots SVG graph online :)