2023-05-20 at 09:45 HST: KPF Red Detector deltaT=-5.3

While work was being done on the green, apparently the red side was disrupted. The archon power appeared off at the power strip (0W being drawn) and no temperatures were being reported. Investigation revealed that the archon switch was on, power cord was in, but chassis was cold (consistent with power strip reading 0W).  The archon box was then power cycled (using switch on archon) and that seems to have brought it up.  Cables run over the green, so they got wiggled during green work, so maybe a bad cable connection.

Eventually power cycling and restarting software brought it back online, but the thermal control was inactive for several hours.

Open