TITLE: 05/22 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
SEI_ENV state: MAINTENANCE
Wind: 11mph Gusts, 6mph 3min avg
Primary useism: 0.03 μm/s
Secondary useism: 0.09 μm/s
QUICK SUMMARY: HAM1 pumping continued overnight, but starting about 1.5 hours ago the pressure started rapidly climbing. No cause determined as of yet. VAC team has been contacted.
EDIT: Had the wrong channel trended, corrected in current attachment.
The gate valve on top of HAM1 was closed and the pressure is now holding; trend attached.
Note that we currently have a potentially confusing situation of two EPICS pressure channels for HAM1, only one of which is correct:
H1:VAC-LY_X0_PT100B_PRESS_TORR Is the correct channel, current value 1.3e-05
H0:VAC-LY_X0_PT100B_PRESS_TORR Is NOT the correct channel, unfortunately is misreports a better vacuum than we have, current value 1.5e-07
I went through all the vacuum MEDM screens and replaced the "H0" channels with the "H1" where ever I found them. Old MEDMs may still have the wrong value.
Vacuum FOM (nuc22) updated to new HAM1 gauge.
I've edited the caqtDM UI file for the Vacuum FOM to correct the HAM1 PT100B channel and remove the PT100A entry.
Troubleshooted, see here: aLog no. 84556