| Line 3 was replaced by line 3 |
| - !liquid Nitrogen |
| + !General Remarks |
| At line 4 added 4 lines. |
| + |
| + |
| + !Liquid Nitrogen |
| + |
| Line 18 was replaced by line 22 |
| - !liquid Helium |
| + !Liquid Helium |
| At line 49 added 5 lines. |
| + All our cryostats are monitored and controlled with [SEA|http://lns00.psi.ch/sinqwiki/Wiki.jsp?page=Sea]. |
| + All instruments are equipped with a temperature controller (Lakeshore 340) for the temperature control and a cryostat control unit (CCU) |
| + for the control of pressures, levels and valves. |
| + The CCU will only work with a correctly configured SEA instance. It can read the pressure in the VTI pumping line (see [orange cool down|http://lns00.psi.ch/sinqwiki/Wiki.jsp?page=OrangeCryostatCooldownProcedure] and set the needle valve accordingly. It reads the analog output of AMI Helium level meters and serves as a level indicator for our 2 point |
| + liquid Nitrogen level meter. The Unit is used to energize the electromagnetic valves involved in the automatic Nitrogen/Helium refill. |
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