UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20110715

2011/07/15

1201 Double checked the resistances. Found FET Tsense +/FET heater- on ZC70 is conducting. No gross leak found at He background 3e-8cc/s. Raised dewar.
1236 Found both He3&4 pumps were off. Turned them back on.
1358 Filled bath with He gas. G3 reads 227mbar. No leak found at BG 2.7e-8cc/s.
1401 Evacuated and isolated 1K pot
1411 Put 2.5mbar N2 exchange gas in IVC. Start to transfer liquid N2.
1618 Liquid N2 transfer completed. Mixing chamber temperature:217 K
1647 Fill N2 cold trap full. Started cryocleaning mixture.