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2013/06/26

1030 Filled LN2 coldtrap full.
1050 Stopped flashing on LEDs.
2000 Began helium transfer (16.1%).
2100 Finished helium transfer (90.7%).
2340 Mixing chamber temperature is very erratic. Tried to reduce pressure of main bath, which intially caused temperature to spike at 108 mK before falling again. After replacing bung once mixing chamber temperature dropped below 80 mK, temperature continued to fall until 77 mK before rising to spike above 200 mK. Temperature at 130 mK currently, and falling. Hopefully this is the last of the fluctuations.