Bruker RS - Cooling down from 300 K to 80 K

73
ZTKS0156 / Z31820 / Rev.: 03
Assembling
4.3.4 Cooling down from 300 K to 80 K
Preconditions
• Magnet Stand mounted (refer to the manual of the Magnet Stand).
• Helium flow system mounted (see chapter ”Mounting the Helium Flow System”
on page 4-70).
• Cryostat is evacuated with a vacuum less than 5 x 10
-8
bar.
• Cryogenic Refrigerator mounted completely.
• Transportation dewar with sufficient dry and warm nitrogen gas.
• Transportation dewar with sufficient warm helium gas.
• ACD (Automatic Cooling Device) mounted on a transportation dewar with sufficient
liquid nitrogen.
WARNING
Cryogenic Agents (see page 2-21)
Gas under Pressure (see page 2-22)
Figure 4.77: Assembly for cooling down from 300 K to 80 K with ACD
1 Current lead turret
2 Helium fill-in turret
3 ACD (Automatic Cooling
Device)
4 Transportation dewar with
liquid nitrogen
5 Transportation dewar with
warm nitrogen gas