Testing integral non-linearity of various metrology instruments

bbs_tin
Illya Tsemenko

Here I'll be posting various test results from random electrical metrology instruments I come across.
For starters - INL sweep of Fluke 5500A calibrator on DC Voltage function using tandem of two good HP 3458A DMMs.

1 V test (5500A on 3V range, 3458As with NPLC10)

https://xdevs.com/doc/xDevs.com/CalFest_2026/inl/dcla_5500_gpib3_1v1_rnd1v_hp3458gp8_nplc10_3458g11_soak10s.dsv_1.png

https://xdevs.com/doc/xDevs.com/CalFest_2026/inl/dcla_5500_gpib3_10v_rnd1v_hp3458gp8_nplc10_soak10s.dsv_1.png

10 V test (5500A on 30V range, 3458As with NPLC1)

https://xdevs.com/doc/xDevs.com/CalFest_2026/inl/dclb_5500a_101v_rnd10v_hp3458-8_3458a11_nplc1_soak10s.dsv_1.png

10 V test (5500A on 30V range, 3458As with NPLC50)

https://xdevs.com/doc/xDevs.com/CalFest_2026/inl/dclb_5500a_101v_rnd10v_hp3458-8_3458a11_nplc50_soak10s.dsv_1.png

100 V range test (points on lower 30 V of 5500A are not tested in this run

https://xdevs.com/doc/xDevs.com/CalFest_2026/inl/dcla_5500_gpib3_100v1_rnd1v_hp3458gp8_nplc10_3458s11_soak10s.dsv_1.png

Methods and scripts are explained in good details in this article.

If you have your own INL sweeps that you can share, please join and post in this thread.