| 0015 | Fill N2 cold trap full. |
| 0940 | Filled LN2 cold trap. |
| 1500 | Tower temperature has increased to 130 mK. Pressure in G1 is 81 mbar, pressure in G2 is 68 mbar. It appears to indicate that helium cold trap requires cleaning. |
| | Close valves 6 & 13a on IGH to stop circulation (valve 12a is leaky, so remove mixture from nitrogen cold trap 1 too). Close condenser line speedivalve to isolate helium cold trap from fridge. |
| | Open valves 5 & 9 to pump mixture from nitrogen and helium cold traps into dump. Wait for G1 to drop to 0 mbar. |
| 1626 | Isolated helium cold trap and pulled it out. Pressure in G1 rose to ~ 10 mbar, then dropped. |
| 1758 | Cleaned helium cold trap. Recommenced circulation. |