Problem raith SNF 2007-07-16 16:54:31: Problems with reduced water flow through Electron Optics board.

jwc at snf.stanford.edu jwc at snf.stanford.edu
Mon Jul 16 16:54:32 PDT 2007


Water flow error occurred at about 16:30 hours today. 
Users had been reporting starnge image jumping and drifting side to side over the weekend.
Checked chiller unit in basement chase and determined that the water flow loop had been compromised and the water flow has been reduced to 0.4 liters per minute down from 0.8 to 1.2  lpm obesrved several weeks before.  Cooler outflow temperature is regulated and in specification at 20 degrees C. -- return line at 23 - 24.8 degrees C. RAITH Field service was called and left voicemail at 16:45 hours.  We have a rebuilt chiller in house ready to install -- but likely will wish to replace turbo pump and e/o card components and water supply and return lines at time of installation to prevent reoccurrance of problem.
JWC




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