| 1028 | Start to leak check IVC. Found He gas cylinder was empty |
| 1047 | Changed He gas cylinder. IVC He BG 6.4E-9cc/s. No leak found from outside to IVC. |
| 1146 | Raised dewar. |
| | Evacuate main bath and fill in He gas. No leak found to IVC. |
| 1400 | Start to transfer liquid N2. |
| 1407 | Fill IVC with 10mbar N2 exchange gas |
| | Fill N2 cold trap full. |
| 1730 | Level meter resistance 1.31 kΩ. Stop LN2 transfer. |
| 1900 | Isolate leak checker and hook up to vent on IGH in preparation for leak checking mixing chamber lines. |
| 2040 | Background He leak level 2.8E-7 mbar l/s; vent speedivalve closed; He-4 pump on; valves 2a, 4a & 5a open. |
| | Leak check flanges leading up to vent: no leak. |
| | Turn off He-4 pump and open vent speedivalve. Background He leak level shoots up to 1E-3 mbar l/s, decreasing gradually. Plateaus at 2.8E-6 mbar l/s. |
| 2125 | Leak check all flanges from IGH to: 1 K pot speedivalve; He-4 pump; blocked-off IVC port; and main bath port. Leak rate rises to 3.8E-6 mbar l/s. However, there is no spike, indicating that this is the background level. Safe to assume there is no leak in this section. |
| | Close valves 2a, 4a & 5a. |
| | Close gate valve and condenser line speedivalve to isolate fridge. |
| | Close all valves on IGH. |
| 2155 | Open valve 9 to keep an eye on pressure in dump with G2. |
| | Open valve 7. Background He leak rate increases rapidly, and drops just as quickly, plateauing at 3.2E-7 mbar l/s. |
| | Open valve 2. Background He leak rate jumps to 6.9E-7 mbar l/s. |
| 2200 | Open valve 1 to leak check condenser line and helium cold trap. Check performed on all flanges and joints from IGH to condenser line speedivalve. No leak found; background He leak rate 7.9E-7 mbar l/s. |
| 2210 | Close valve 1. Open valve 12a to leak check cold trap 1. Background He leak rate increases slightly to 1.7E-6 mbar l/s. This is probably due to the contaminants in the trap from cryocleaning. |
| 2220 | Spray 4 flanges: 2 in and out at IGH; 2 in and out at cold trap 1. He leak rate falls to 1E-6 mbar l/s. No leak. |
| | Strange that pressure in G1 is 1 bar. Perhaps the line is rather constrictive, or in other words the impedance is high. Perhaps G1 is not reading the correct pressure: possible as it doesn't seem to fall much below this value when pumping mixture into dump. |
| 2235 | Close valve 12a. Leak rate drops to 5.5E-7 mbar l/s. |
| | Open valve 13a to check cold trap 2. Leak rate rises to 2.6E-6 mbar l/s. |
| 2245 | Spray 4 flanges: 2 in and out at IGH; 2 in and out at cold trap 2. He leak rate falls to 1.2E-6 mbar l/s. No leak. |
| 2310 | Close valves 13a and 2. Open valve 8 to take a look at pumping line. He leak rate 2.3E-6 mbar l/s. |
| 2355 | Leak check all flanges from main pumping line on IGH to gate valve via He-3 pump. He leak rate 6.9E-7 mbar l/s. No leak. |