Reports until 15:25, Tuesday 05 December 2017
H1 PEM
jeffrey.bartlett@LIGO.ORG - posted 15:25, Tuesday 05 December 2017 (39645)
Monthly Dust Monitor Vacuum Pump Checks
   Check all dust monitor vacuum pumps and adjusted vacuum pressure where necessary. All temp checks are good. 

   The corner station pump is showing a bit of carbon on the muffler. Will continue to monitor soot on muffler and watch for pressure changes, that indicate the vanes are getting close to end of life. I have a rebuild kit on site for this pump.