Bruker RS - Energizing; Inserting the Current Lead

80
ZTKS0156 / Z31820 / Rev.: 03
Operation
5.2 Energizing
Precondition
• Cryostat at 4.2 K for at least 12 hours.
• Helium level at the helium level sensor is above the "minimum level during
energizing" (see Appendix Technical Data of the supplied User Manual).
• Both PT 100 temperature sensors show the same set value.
• Cryogenic Refrigerator operating correctly.
5.2.1 Inserting the Current Lead
1. Prepare the Bruker Power Supply and main power cable.
2. Remove the plug out of the turret cap of the helium fill-in turret.
3. Insert the auxiliary shorting plug into the helium fill-in turret.
4. Remove the shorting plug out of the current lead turret.
5. Insert the dry current lead into the current lead turret respecting the correct position.
The current lead can only be inserted in one position.
6. Connect the main power cable and control cables of the Bruker Power Supply with
the current lead.
7. Connect the short circuit cable to the main power cable until energizing.
8. Remove the auxiliary shorting plug out of the helium fill-in turret.
9. Close the helium fill-in turret with the plug of the turret cap.
10. Switch the Bruker Power Supply ON.
Figure 5.1: Helium Flow System during energizing
1 Current lead
2 Connector
3 One way valve
4 Stop valve
5 Cold Head
6 Quench valves