The results for this month's OPLEV charge measurements (performed on both ETMX and ETMY) is attached below.

  ETMX: the effective bias voltage for the 1st quadrant for the pitch is showing to be 20V along with a massive error bar. This is a drop from 50V, however the error bar shows that this number cannot be trusted. For the Yaw it is around 60V. In  the other quadrants the bias voltage is between 0-50V and is consistent with previous trends.

ETMY: The bias voltage in the first and the third quadrant is between 25-40V (both for the pitch and Yaw, except for the 1st quadrant for the pitch which is at negative 20V). However in the 2nd quadrant it is above 50V for the pitch and around 10V for the Yaw.

All the slider values were restored after the measurements were complete and SDF differences checked.

Strangely, today the terminal window and  Matlab was struggling to find the data stored for 2020. After several refresh (clear all and PC re-starts, which was Dave's suggestion) it worked.