Liquid Nitrogen Line Log

July 25, 2001

Vacuum line pressure reading rose to 10mT from usual 2mT. Close the valve and observe the pressure rise to 15mT over 2-3 minutes - no leak large enough to produce 10mT against a pump that is up to speed.

Topped off the oil in the Welch rough pump and pressure is back to 2mT.

September 28, 2001

Motor failed - see September 2001 log

Last modified: 21-Mar-2002 15:28:05.

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