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Reports until 10:44, Monday 02 July 2012
H2 SUS
richard.mccarthy@LIGO.ORG - posted 10:44, Monday 02 July 2012 (3323)
H2 ETMY L2 OSEM ReadBacks
It would appear that someone shut off the coil driver chassis for the L2 stage of the ETMy thus causing the ill functioning OSEMS noted by Keita.  If you trend the the channels on DV you can see the channels going down for the new resistors for the BIO channels on6/15  then on 6/22 the channels go down again where they stayed until this AM when Fil and I powered the chassis back up using the on/off switch on the back.  We also took this opportunity to verify the BIO are functioning.  We put offsets on the Coils in software and measured at the output of the coil driver.  With a 1 in the appropriate field we saw signal with an 0 on that field we saw the output drop to~zero.  In the control room I could see the offset signals on the OSEMS if I drove it very hard.
Displaying report 1-1 of 1.