| 1050 | Pressure in G1 and G2 around 45 mbar. Mixture has condensed. |
| | Tower temperature is 6.2 K. Rather high: perhaps this is due to a blockage. |
| 1130 | Start LHe transfer. He liquid level 11.2%. |
| 1240 | Finish LHe transfer. He liquid level 92.2%. |
| 1325 | Fill N2 cold trap full. |
| 1430 | Circulate mixture through nitrogen cold trap 1. |
| 1500 | Mixture is pumped out very quickly at first. Valve V6 reduced from 20% open to 12%. This helps matters. |
| 1700 | Everything fine when increasing in 0.5% increments until we increase valve V6 to 14.5%. Mixture seems to stagnate. Flow is not good. See how things look in a few hours. It could be down to a blockage. Open needle valve further to pump more out of 1 K pot: its temperature is stable at about 1.6 K, 20 mbar pressure in exhaust line. |
| 2200 | Flow is poor, pressure in G2 high, but within acceptable range. No improvement, although tower temperature is decreasing. |
| | Call Vuk. Decide that it is safe to leave overnight. See what situation is like in the morning. Reduce valve V6 to 13% for safety. |
| 2330 | Something interesting happened. Filled N2 cold trap full, and circulation picked up: G2 reads 97 mbar. Tower temperature increased, probably as a result of warm mixture entering the system. Increase valve V6 to 14%. |
| 2350 | Stagnating again. Short-lived joy. Tower temperature still increasing, but looks like it is leveling off. |