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User name Sulkosky
Log entry time 21:38:42 on April27,2004
Entry number 119598
This entry is a followup to: 119573
keyword=RICH Methane Bottle Changed
Jack switched the Methane bottle for the RICH detector earlier this afternoon. The first bottle appeared to have a higher level of oxygen, so he replaced the bottle again. Afterwards the oxygen level was normal (i.e. < 30 ppm), so he had me switch the channel modes from Purge to RegFlow. However in about an hour, the level started to climb above 50 ppm, so Jack had me switch back to Purge mode until the level came back down to the normal operating level. At 20:12 the oxygen level had been below 30 ppm for sometime, so I changed the gas chamber channels back to RegFlow. The level has remained between 20 and 25 ppm over the past hour.