ryan.crouch@LIGO.ORG - posted 10:51, Thursday 01 February 2024 - last comment - 11:31, Tuesday 13 February 2024(75671)
Dust monitor levels
The dust monitor IOC was restarted this morning by Dave which can reset the alarm levels. Following document E1600132, I confirmed that the alarms levels are still set properly, The CS dm alarms, 5, 6 & 10 are set to the "Class-100" (major alarm at 100 counts for both 0.3u and 0.5u as opposed to their normal 10000 for 0.5u and 7000 for 0.3u) as defined in the document since these monitors are by vented open chambers. Once the chambers are closed back up I'll put the CS dm alarm thresholds back.
I've set the alarm levels for dust monitors 6 and 10 back to their nominal levels of 7000 counts minor and 10000 counts major for both 0.3u and 0.5u since HAM3 is closed and the cleanroom is off. Dust monitor 5 (HAM6) remains at the lower alarm level of 70 counts minor and 100 counts major.
DM5 is actually the DM by HAM3 and DM6 is by HAM5/6/7. So I set DM5 back to its higher levels since the doors back on and I lowered DM6s to CLASS 100 levels till the doors go back on later this week.