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2011/10/25

0945 Mixture wasn't circulating in cryocleaning. Increase V6 to 14.1%. MC X12004 = 5.4K. Temperature kept rising, there is not likely a leak. IVC pressure 5.4e-7mbar.
1043 Pump mixture into dump. Close all valves.
1100 Close IVC, start 1K pot, open gate valve and condenser valve, start condensing mixture.
1301 Start to circulate mixture.
1823 Tower temperature 66.8mK. Power up two DCRC boards.
Start flashing detector. Flashing two LEDs on DIB1, temperature rose to 322mK. Flashing all four LED2, temperature rose to 455mK. Flashing settings: LED currrnt 0.6mA, 100us ON, 5000us OFF, both LEDs enabled.
1841 Tower temperature dropped to 361mK at 18:36. Found LEDs on DCRC30(DIB1) stopped working. It was likely the board was reset.
1847 Filled N2 cold trap.