betsy.weaver@LIGO.ORG - posted 13:24, Tuesday 24 January 2017 - last comment - 13:21, Wednesday 25 January 2017(33591)
Weekly TUES ETM charge measurement Trends
THis morning I took the weekly ETM charge data set. Unfortunately I did not put 2-and-2 together that Beckhoff EX issues may have caused problems with the SUS ETMX HV power supply while I was running the measurement of ETMX, so its data has a bit of a large error bar. Even so, it mostly looks like things are OK there wrt charge accumulation (or lack thereof!). All looks good at ETMY as well.
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What were the Beckhoff EX issues?
ETM X was not a Beckhoff issue. The power supply had a problem. Though still on the display was not displaying properly and thus we were not sure the unit was capable of providing power. Power cycle did not fix this but removal of HV card from back and re-installing it did. ETM-y BRS Beckhoff computer had a problem and needed to be restarted.