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ZTKS0156 / Z31820 / Rev.: 03
Operation
Interrupt Energizing
1. Set the current of the Bruker Power Supply to the value of the coil current.
2. Wait until the voltage is 0 V.
3. Close the main heater switch.
4. Wait 5 minutes.
=> Main heater switch is closed. Main coil is now persistent.
Continue Energizing
1. Set the current of the Bruker Power Supply to the value of the coil current. Wait until
the current of the Bruker Power Supply is reached.
2. Open the main heater switch.
3. Set sense voltage to 30 mV.
4. Shim heater automatic: Z and Z
2
heater ON.
5. Continue according to the energizing assignment.
5.2.3 Cycling Procedure
i
Cycling only recommended for magnet systems of 500 MHz and more.
1. Check the time between energizing and cycling was at least 12 hours.
2. Check the helium level is above "minimum level during energizing" (see Appendix
Technical Data of the supplied User Manual). Refill the helium vessel if necessary.
3. Cycle all Z shims with currents according the cycling assignment (see Appendix
Technical Data of the supplied User Manual).
4. Allow the shims 2 minutes to hold these currents.
5. Discharge shims.
6. After energizing/de-energizing the shims at least two times start the shim automatic.
7. Stop shim automatic if procedure has been completed.
8. Wait at least 12 hours before shimming.
Continue with shimming, see chapter ”Shimming Procedure” on page 5-83.
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