Had two separate VACSTAT glitches overnight (plots attached)
- BSC3: 1209utc (409amPT) for about 2-seconds.
- EX: 1347utc (547amPT) for just over 1-second.
I'm not sure on how to run a reset (toggling the DISABLED/ENABLED removed red status for BSC3, but it changed to a purple color, so I'm guessing a restart for vacstat_ioc.service will be needed per alog); I sent a text to Dave.
This morning's VACSTAT false alarm was caused by two sensors randomly glitching within 2 hours of each other (Corner station BSC3 and EX BSC9).
Timeline (all times PST):
04:08 BSC3 PT133_MOD2 has one of its regular glitches, which puts VACSTAT into sensitive mode waiting for a coincident chamber trip.
05:47 BSC9 PT510B has a random glitch which exceeds the lowered delta-P trip level. Alarms are sent to the vacuum team.
08:48 VACSTAT restarted to reset
Attached 5 hour trend shows the BSC3 glitch (top row) and the BSC9 glitch (bottom row) 1hr 38min later.
Attached BSC9 7-day trend show it does occassionally have small glitches, but this morning's was larger and just enough to exceed the lowered delta-P trip level.
