Reports until 04:37, Thursday 02 November 2017
H1 IOO (IOO)
cheryl.vorvick@LIGO.ORG - posted 04:37, Thursday 02 November 2017 (39256)
testing IO dog clamp bolts in HAM2 - none were actually loose but results were also not completely reassuring

Having discovered a dog clamp bolt for my iris marker in front of PRM was not as tight as I thought it would be, I tested a few other select IO dog clamp bolts (on baffles and beam dumps) and found that some could be tightened.  I tested SUS dog clamps on IM2 and IM1, and none that I tested were loose.

When closing out HAM2 in 2013 I torqued all of the dog clamp bolts, of which there are many, and then I asked Scotty to check all of the ones he could reach with the torque wrench, and he found only a couple that needed to be tightened.

With that information, the dog clamp bolts I tried yesterday were all easily accessed, so I'm confident that both I and Scotty tested them in 2013, and yet I found some that had some room to rotate.

Not sure if this might be something that is contributing to Jeff's B&K results for of components in HAM2, not sure about the effect of checking/tightening all of the dog clamp bolts in HAM2 now, but since that was something that was done in the original IO install, I wanted to alog what I found yesterday.