Reports until 09:29, Monday 16 December 2019
LHO VE (CDS, OpsInfo)
chandra.romel@LIGO.ORG - posted 09:29, Monday 16 December 2019 - last comment - 09:54, Monday 16 December 2019(53917)
PT427 & PT527

Niko called me last night concerned about PT427 alarm. PT427 & PT527 (Y2-8 & X2-8 locations) are pressure gauges on ion pumps 250 meters from end stations on beam tube, and are powered by a solar powered battery pack that is known to lose charge in winter due to lack of sun and insufficient battery capacity. These gauges will likely alarm throughout the rest of the winter until more batteries are added. Red light next to gauge on VAC OVERVIEW MEDM screen indicates this mode of alarm.

Comments related to this report
corey.gray@LIGO.ORG - 09:40, Monday 16 December 2019 (53919)OpsInfo, VE
Link

Thought I'd toss in a photo of the overview pointing out the vacuum gauges for these solar ion pumps.

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chandra.romel@LIGO.ORG - 09:54, Monday 16 December 2019 (53920)
Link

Thanks, Corey! The ion pumps have a 250 meter long high voltage cable that runs to the end stations so the pumps are powered by a remote controller located in mechanical rooms at end stations. The pressure gauges are powered by charged batteries local to equipment.