The Squid should be refilled if Helium levels are below 50%

1. Make sure you have a helium vessel that still has enough (what is enough?) helium
2. Close all valves of the vessel
3. Attach hose to compressor and vessel.
   1. 
4. Open valves between vessel and compressor
5. Remove fillcap from SQUID. It will POP out!
6. Attach the fill hose (recovery line) between the SQUID and Cryostat.
   1. 
7. Open the valves on this hose.
8. Get the large main fill line
   1. 
9. Open red valve on He-vessel. Put the large part of the hose into the vessel at average speed.
10. Wait until cold gas sputters out the other end of the fill hose (~one minute). You will get a cold flame.
11. Remove the small cap from the recovery line on the SQUID
12. Insert the other end of the fill hose in the SQUID. (use heat-gun if it gets suck because it got frozen.
13. Go to the computer and select: utilities→helium fill→start
14. Plug in the power line of the compressor.
15. You are now pumping. It is best to monitor the refill. (It will take about 30 minutes) Pay attention to:
    1. The pressure (read-out on He-Vessel indicator) should not exceed 0.5 Bar. You can regulate this by clamping the compressor bypass.
    2. The fill rate (read-out on computer) should be around 1-1.5%/min.
    3. The Vessel Valve should be heated while filling with the heating gun(at half-heating power), to prevent the valve from freezing.
16. There are no instructions yet to stop the filling and disconnect the He-Vessel. Ask for help.

Original (InkScape) vector graphic (remove pdf extension).