Last week the effective bias voltage on the test mass mirrors were showing an upwards trends, hence we decided to take another measurements this week to see how things are going (else this is a monthly exercise now).  Seems like ETMX seems to have improved (or rather say distributed the charge) for some quadrants. Overall everything looks to be within limits (which is +-50V). Similarly, on ETMY, there is drop in the charge accumulation (except for the 1nd quadrant for the Pitch, which is above 50V).

All the slider values were restored after the measurements and SDF difference checked and removed.