Reports until 16:28, Friday 10 May 2013
H1 SEI
hugh.radkins@LIGO.ORG - posted 16:28, Friday 10 May 2013 (6334)
WBSC2 SEI/HEPI Pier3 Pod Replacement Complete--IPS data here is RESET ***

Re aLOG 6184, I completed the replacement of the Kaman Inductive Position Sensor (IPS) on corner3 (SE) BSC2. The Kaman satellite box mounted inside the Pier Pod faulted and will go back to the shop. We installed another pod which had the Kaman inside but of course was unmatched to the Coils. EE mounted a replacement Box inside the original Pod and today I swapped out the coils on the HEPI Actuators. There is one box for both horizontal and vertical so both had to be replaced. This was no fun with terrible vision and less access. Refer to the photos attached: The pdf is a view of the HEPI Housing under the SE corner of the BSC2 Crossbeam and has a couple pointers on it locating the Flag, D030705 and the Kamans mounted on the Sensor Holster D020369 on the Vertical HEPI Actuator. The Sensors are on the floating portion. The first photo zooms into the top of the vertical Actuator. The Flag must be loosened but fortunately not removed so it can 'yaw' allowing the Sensor Housing/Holster Assembly to be completely removed so the coils can be swapped. Finding the 3/32 SHCS holes behind everything inside there was why there were reports of loud hollering in the LVEA this afternoon. The second photo is the Horizontal which was way better but still not fun. Bad/Removed PierPod/Kaman: S1202914/S0812221-06-04; The original PierPod went back in with Kaman S0812221-06-22.

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