^ | IVC at 4.6e-3 mbar. CVJ pumped out overnight. Continue to LN2 transfer steps |
Make sure mixture is isolated in the dump.
Check fridge pressures by opening condenser speedivalve+V1 and still gate valve: LHe trap+Condenser(G1)/Still(P1) = no change/2000+ mTorr(already up, no change).
Connect scroll pump to He-4 pump line, turn it on.
Open pump line valve, V5A, V2A, V4, wait a minute, then open V5.
You're now pumping on the fridge lines. Wait until P1 and G1 flatten out.
Close condenser speedivalve and still gate valve, V1, V5, V2A, V5A and close and turn off the scroll pump.