LTZ Metal box powered by +15.0000VDC from MFC

Test of Metal box KX LTZ in ambient. Powered by Time 9823 +15.00352 output (+15.00000V measured).
3458A@NPLC200 OCOMP ON with 1s delay

TCBOX 3458-LTZ is +0.057 ppm/K after initial soak 7 hrs and ACAL
Voltage: 7.13664065 VDC
Black dots - individual DMM samples.
Voltage change to +14V 9:18am 7/10
Voltage change to +16V 8:30am 7/11

Result CSV-data from HP 3458A


* 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 :)