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2014/06/06

1025 Begin pumping out He exchange gas from IVC. Mixing chamber temperature at 77.14 K.
1100 Fill LN2 cold trap full.
1345 Switch over to leak checker from turbo pump. Final IVC pressure at 2.2E-5 mbar.
1350 Commence LN2 blow out. Background leak rate of 5.3E-8 mbar*L/s.
1500 End LN2 blow out. Leak rate reached 4.2E-8 mbar*l/s. No indication of a leak.
1530 Pump out main bath. Add 0.22 mbar He exchange gas to IVC.
Commence pumping mixture to dump.
1545 Flush the main bath with He gas. Pump out the 1K Pot.
1550 Perform 77 K electrical check.
1630 Commence LHe transfer (-1.0%).
1750 With mixing chamber temperature at 16 K, begin pumping out He exchange gas.
1900 End LHe transfer (69.4%).
1920 Fill LN2 coldtraps full.