[Luke, Luis, Jon, Tyler]
On the 22nd Dr. Richardson showed Luis, Tyler and I how to preform a leak test with the RGA. We did the initiall test and found a few leaks two were particuarly bad highlighted in orenge below. To try and remidy this we planned on replacing the copper gaskests on the leaking flanges. We then began taking the two problem flanges off, but seven of the eight bolts holding on the turbo pump were over tightened and had seized. So after we got them off we postponed the rest of the work to the next day.
On the 23nd Luis and I reattached the badly leaking flanges with new copper gaskets. We then preformed the Helium leak test with the RGA. As seen in the table below we weren't able to majorly changed the leaks in the two flanges.
| Connection |
Initial |
After disassembly |
| Tee - RGA |
3.1e-9 -> 2.4e-9 |
9.2e-9 |
| Tee - Cal leak |
Low |
Low |
| Tee - ZLR (2.75"-4.5") |
Low |
9.2e-9 |
| ZLR (2.75"-4.5") - Reducing Cross |
2.1e-8 -> 1.9e-8 |
3.6e-8 -> 9.3e-9 |
| Cross - Elbow |
Low |
1.2e-9 |
| Elbow - Pressure sensor |
Low |
2.9e-9 |
| Cross - Turbo pump (small) |
2.1e-8 -> 3.1e-8 |
6.9e-8 -> 2.2e-8 |
| Cross - Gate valve |
Low |
Low |
| Gate valve - Port |
2.4e-9 -> 2.2e-9 |
1.2e-9 |
| Port - ZLR (6.0"-8") |
1.1e-9 |
N/A |
| ZLR (6.0"-8") - Turbo pump (large) |
Low |
N/A |
| Port - Pressure sensor |
Low |
N/A |
| Port - Up to air valve |
Low |
N/A |
| Port - Blank |
Low |
N/A |
| Port - Feed though port |
Low |
N/A |
| Lid |
Low |
N/A |
|