jason.oberling@LIGO.ORG - posted 14:12, Tuesday 16 August 2016 - last comment - 14:39, Tuesday 16 August 2016(29132)
PSL Power Watchdog Trip
The PSL power watchdogs tripped at 20:38:13 UTC (13:38:13 PDT). The cause appears to be the NPRO turning off. In the attached trend the NPROOK channel, which monitors if the NPRO is working or not. goes to zero (indicating the NPRO turned off) at 20:38:08 UTC, 5 seconds before the power watchdogs trip. The cause of the NPRO turning off is currently unknown. I am bringing the PSL back up.
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PSL is now back up and running; came up without issue. Unknown at this time what caused the NPRO to shut down, will investigate. I reset the injection lock reset counters. Filed FRS 6060 to document the NPRO shut down.