Reports until 17:42, Wednesday 03 January 2018
H1 TCS (TCS)
greg.grabeel@LIGO.ORG - posted 17:42, Wednesday 03 January 2018 - last comment - 12:09, Thursday 04 January 2018(39977)
CO2 Chillers

GGrabeel, TVo

Topped off the chillers and started them back up this afternoon. They immediately faulted out, due to a set-point error. I set them to run in manual while I checked for leaks, there were no apparent leaks. TVo found the problem in EPICS where an integrator on a control loop was causing the set point to steadily increase (It was up to about 500,000 degrees Celsius I think). After turning off some inputs and filters we were able to get the more reasonable value of 21 degrees Celsius. The chillers will continue to run and be re-checked tomorrow.

Comments related to this report
jeffrey.bartlett@LIGO.ORG - 12:09, Thursday 04 January 2018 (39987)
   This morning I noticed a large puddle of water under the TCS-X chiller. Water level looked OK in the site glass.