Peter, Jason, Jeff B, Nutsinee
The TCS CO2X laser was down due to the power outage this morning along with many other systems. Jeff Bartlett reported that the chiller was tripped and he restarted it. We later restarted the power supply on the mezzaine which then brought the system back up. However, the timeseries of the flow alarm didn't imply that the alarm was tripped when the chiller was shut off and the laser output continued to have non-zero reading for over an hour until the frontend was restarted. Moral of the story is, some of the channels would continue to record fault values after a power outage until the frontend gets restarted. Another moral of the story, maybe we should move TCS CO2 power supply to the CER.
I think the TCS power supplies were located in the mechanical room because they are switching supplies and we wanted them far away from other electronics. By the way, there is a second mechanism that shuts off the laser if the chiller goes off (not just the flow meter) which is that the chiller has a built-in relay that acts on the laser controller to turn off the controller. It was added so that we weren't reliant on low flow rate turning off the laser.