chandra.romel@LIGO.ORG - posted 15:11, Friday 06 May 2016 - last comment - 23:53, Friday 06 May 2016(27052)
CP4 (obsolete) temp sensor alarm
CP4 was sending out a yellow alarm on CP4 so I looked more closely and noticed one of the temp sensors (from heat tape) is reading bogus value. Attached is trend. It started yesterday in the morning.
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However, this bogus temp reading did not cause the alarm. The liquid level of CP4 was spiking (seen only in *seconds* trend scan) due to back pressure from flow meter. See Kyle's log entry above for more detail.