Initial conditions:
Magnet Level: The magnet is already cold. The helium level in the magnet does not matter, but it should not be warm.
QT Dewar level: Liq A has some liquid and should be cold.
QT Dewar level: Liq B = Warm, pumped, and purged. Flushed out level sensors.
- [MV02 should be set to restrict flow to allow only 100 SLM; if it is, then the pressure should be able to be regulated in the dewar].
- The inlet flow should be around 60 slm, and the outlet should be 60 slm. At the beginning of the dewar A/B cooldown, open VJVA/B and VPC ahead of time.
- Dewar setting should be on AUTO+Liquefy mode. The entire flow should be going out through VPC. You can monitor this flow by looking at FMR.
Note: If the heaters come on due to set pressure when the dewar is warm in the beginning, it's fine. Once the dewar starts cooling down, adjust the pressure to keep the heaters off.
4. Run the system for about four hours.
5. Then switch it to normal modes, like 20slm (outlet), AUTO+Liquefy, and dewar, set pressure at 6.5 psi, and leave it there until it starts liquefying.
