81
ZTKS0156 / Z31820 / Rev.: 03
Operation
5.2.2 Energizing Procedure
1. Check the helium level is above "minimum level during energizing" (see Appendix
Technical Data of the supplied User Manual) regularly during energizing. Refill the
helium vessel if necessary.
2. Check the settings (current and inductivity) of the Bruker Power Supply:
- Check the main heater current. The current of the main heater must be the same
for the magnet coil and the Bruker Power Supply.
- Check the shim heater current. The current of the shim heater must be the same
for the shim heater and the Bruker Power Supply.
3. Make the main coil heater switch test.
4. Open the main coil heater switch.
5. Start the shim heater automatic.
6. Switch the Z and Z
2
-Shim heater ON.
7. Set the sense voltage to the first value of the energizing assignment (see Appendix
Technical Data of the supplied User Manual).
8. Set the current to the first value of the energizing assignment (see Appendix
Technical Data of the supplied User Manual).
9. Wait until the sense current at the Bruker Power Supply is 0 V.
10. Continue in the same way with the other values and the overshoot of the energizing
assignment.
11. Check the sense voltage is exactly 0 V for 5 seconds.
12. Close the main coil heater switch.
13. Wait 5 minutes.
=> Main coil heater switch is closed. Main coil is now persistent.
14. Set the current to 0 A at the Bruker Power Supply.
15. Wait until the Bruker Power Supply shows 0 A.
16. Remove the main power cable from the Bruker Power Supply and short-circuit it.
17. The shim automatic must remain switched ON for 12 h after energizing.
Recommended for magnet systems of 500 MHz and more: Continue with cycling, see
chapter ”Cycling Procedure” on page 5-82.
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