Reports until 17:43, Monday 20 July 2015
H1 SUS (CAL, DetChar, ISC, SUS, SYS)
leonid.prokhorov@LIGO.ORG - posted 17:43, Monday 20 July 2015 - last comment - 16:29, Wednesday 22 July 2015(19764)
OPLEV Charge measurements 
We continue the charge measurements on ETMs.
Results for ETMX are consistent with negative trend, now the charge is from 10 to 20 [V] Effective Bias Voltage for all the quadrants.
Results for ETMY do not not show a significant trend (probably, the data are beginning to be consistent with positive trend). Charge is below the 10 [V] Effective Bias Voltage for all the quadrants.

Note:  We had positive bias on ETMX and negative bias on ETMY after discharging procedure. So it seems possible that charging is caused by the bias voltage.
Images attached to this report
Comments related to this report
rich.abbott@LIGO.ORG - 17:40, Tuesday 21 July 2015 (19807)ISC
Link 

Has the bias on ETMX and ETMY remained positive and negative respectively for the duration of this observation?
leonid.prokhorov@LIGO.ORG - 16:29, Wednesday 22 July 2015 (19846)
Link 

Bias was the same for this and next charge measurements. 
It was changed on July, 22:  alog 19821
Today we have the first measurements after changing the bias sign: alog 19848