Reports until 10:30, Thursday 09 February 2012
H2 SUS
jeffrey.kissel@LIGO.ORG - posted 10:30, Thursday 09 February 2012 - last comment - 14:32, Thursday 09 February 2012(2188)
H2 SUS ETMY L1 (UIM) LR OSEM Replaced 
After Jeff reported that L1 (UIM) LR OSEM was saturating the ADC while "open lighted" (see his comment here), Betsy and Travis went in this morning to swap it out with another. His now open light current (in counts) is

controls@cdsws1:Data 0$ tdsavg 30 H2:SUS-ETMY_L1_OSEMINF_LR_IN1
OL = 24151.6 [cts]

(Kinda low, but ... it's fine -- It's the UIM stage, not worth effort of finding another, and that's why we compensate for the gain difference in the OSEMINF banks.)

Speaking of, I've entered the corresponding offset and gain:
 
H2:SUS-ETMY_L1_OSEMINF_LR_OFFSET -12075    (OL / -2)
H2:SUS-ETMY_L1_OSEMINF_LR_GAIN   +1.242    (30000 / OL)
Comments related to this report
stuart.aston@LIGO.ORG - 14:32, Thursday 09 February 2012 (2194)
Link 

Stuart A

To help guide the selection of BOSEMs, prior to making open-light measurements or installing them into the suspensions, please refer to the list attached below. This has been generated by cross-referencing open-light measurements made in Birmingham on the ATE, with the BOSEMs held in stock at LHO (extracted from ICS). For further details please refer to the LLO aLOG entry 2460

In summary, if the BOSEM serial number appears in the text file below, then you can be more confident that the open-light measurement will exceed Jeff K's 25k count goal.
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