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ZTKS0156 / Z31820 / Rev.: 03
Troubleshooting
6.3.4 Procedure in case of Cryogenic Refrigerator failure
In case of a failure of the Cryogenic Refrigerator the temperature of the shield T
RS
will
slowly rise to 200 K and the helium boil off to 250 ml/h. This is usual behavior.
In case of failure shorter than 3 days just restart the compressor of the Cryogenic Refri-
gerator. See remarks at chapter ”During Operation of the Cryogenic Refrigerator”
on page 6-102 for further information.
After restarting the Cryogenic Refrigerator, at least two days are necessary to recover
the previous state of the magnet system. If the temperature and helium boil off does not
decrease in the next two days call Bruker Service.
Figure 6.5: Temperature profile during Cryogenic Refrigerator failure
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