Reports until 17:18, Wednesday 11 April 2018
H1 SEI
hugh.radkins@LIGO.ORG - posted 17:18, Wednesday 11 April 2018 - last comment - 12:24, Friday 13 April 2018(41392)
EndY Yend BSC10 EY HEPI Unlocked

At the request of the controls engineer, the Yend HEPI platform was unlocked.  No issues other than the usual terrible access in unlocking.

Ran Cartesian Range-of-Motion tests of 0.5mm for DOFs X Y Z RX RY & RZ.  Probably sufficient to do X Y & Z but forgot about that before getting started.

The attached plot shows the X Y Z Range of Motion with the local sensors over laying one another.  This shows no bad actors of local sensor clipping, slope differences or changes.  HEPI is clear to +- 0.5mm.  Will check larger ranges most importantly for Y (tidal) another time but this will get us by for now.

The HEPI and ISI platforms are Isolated.

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hugh.radkins@LIGO.ORG - 12:24, Friday 13 April 2018 (41426)

The hints of clipping seen in the above plot was bothering me so I ran another stroke this morning, this time to +- 0.75mm on X Y & Z dofs.  I ran the offsets with the platform Isolated this time.

The attached shows, again, no evidence of any clipping on the platform.   Again, any problems would apprea as clipping or slope changes.

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