Noticed that GV5 had hard closed on Saturday at 19:59 utc time, no human intervention. It appears as if the instrument air pressure left for soft close GV5 was enough to hard close it. According to PEM instruments near GV5 made lots of noise, see attached plot, accelerometer and microphone data.
I checked the dial on the gauge to measure the instrument air at GV5, and indeed there was only about 10 psi, this value is within the "usual" pressure used for soft clossing pneumatic gate valves and per procedure.
No interaction is required at this moment from the vacuum team.
Tagging ISC, since sensitive equipment is hanging near this gate valve, like cameras and OpLevs.
I converted this microphone DQ signal to an audio wav file. The microphone saturates at +/-32768 for a fraction of a second, but you can hear the echo fade away after this.
Here is the accelerometer as a wav audio:
(new file added at 13:52, orig file was created using the incorrect frequency of 16kHz, this is actually a 8kHz channel)
The ITMY Oplev (aligned at the time) didn't see this hard close, plot attached.
Remember GV1 is closed, this makes ITMY Oplev blind, Sum on trend above is very small.