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User name Jack (Techs)
Log entry time 11:46:14 on May 21, 2008
Entry number 239070
This entry is a followup to: 239067
keyword=Nitrogen line not charged
The only cylinder that was swapped out was one of the argon cylinders.
Scot did not swap out any other cylinders. When I went to look at the gas
system I found the Nitrogen line was not charged. I'm not sure how this
happened, we probably missed something earlier. Thus the pneumatic valves
were all closed. Gas was not flowing out of the cylinders. I opened the
bypass valve and charged the Nitrogen line. I then closed the bypass
valve and verified the Right side Nitrogen cylinder was "online". The
indication that the nitrogen line is not charged is zero psi on the low
pressure side of the Nitrogen regulator. In this instance there was also
zero psi on the high side gauge of the same regulator. However, the two
visual pressure gauges above the pneumatic valves showed high pressure in
the lines from the nitrogen cylinders. These two gauges are on the
upstream side of the pneumatic valves. The gauges on the regulator are on
the downstream side of the pneumatic valves. The pneumatic valves were
closed. Things seemed to be running OK when I left it.