2011/09/05

1150	DAQ returned memory error again at start of first file of series 07110905_0531. Stopped DAQ.

Data taken in the last run with reasonable size, 12 series total.

941M    ./07110904_1908
974M    ./07110904_1959
952M    ./07110904_2050
969M    ./07110904_2141
1.2G    ./07110904_2236
1.2G    ./07110904_2327
1.2G    ./07110905_0017
1.2G    ./07110905_0108
1.3G    ./07110905_0204
1.2G    ./07110905_0255
1.3G    ./07110905_0345
1.2G    ./07110905_0436

	Tower temperature increased sharply at 0830, reaching 790 mK and rising at a decent pace. Temperature of 1 K pot at 4.5 K. Pressures in G1 & G2 relatively low at just under 40 mbar.
	The above would indicate that the 1 K pot pump has failed, and the mixture is not circulating (perhaps due to the failure of the He-3 pump). These suspicions are vindicated upon checking the pumps - both pumps are off! It doesn't look like a general power failure as DAQ computer was not rebooted.
	Upon pushing the mains switch, the 'DC FAIL' light illuminates. Resting the power unit seems to do the trick - both pumps whirl into action.
	Tower temperature begins to drop. Keep eye on 1 K pot temperature and pressures in G1 & G2.
1235	Fill N2 cold trap full.
1330	A tower temperature of 55.5 mK reached. Tower temperature still falling.

1521	A connection refused error occurred when trying to start the DAQ to take data. Found port 5001 of DCRC30 was not released.

1525	After releasing port 5001 of DCRC30. The DAQ worked fine.
1547	Start data 07110905_1547_F0001. -6V on Q1-3. Continuation of last run. 1st series of -6V data.