Bruker 700'54 Ascend - User Manual

Questions and Answers:

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dianathompsonAug 23, 2025
What to do if the vacuum in RT vessel of Bruker 700'54 Ascend Laboratory Equipment does not reach 5 x 10-5 mbar within 48 hours?
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  Matthew SchroederAug 25, 2025
  If the vacuum in the RT vessel of your Bruker Laboratory Equipment does not reach 5 x 10-5 mbar within 48 hours, it could be due to several reasons. The O-rings might be damaged, so check and clean them, replacing if necessary those for the vacuum valve, drop-off plate, reduction and sealing flanges, and the bottom plate. Also, the pumping unit or pumping line could be defective; verify they can reach at least 10-6 mbar with the sealing plug closed, and replace if needed. Scratches or dust on the RT bore sealing surfaces can also cause this, so inspect and clean them. Finally, moisture in the RT vessel can be a culprit; use dry N2 gas to pump and flush the vessel.
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Nicole WestSep 1, 2025
What to do if the current lead cannot be removed from Bruker Laboratory Equipment?
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  Mr. Harry BoothSep 1, 2025
  If you cannot remove the current lead from your Bruker Laboratory Equipment, it is likely that the connector is covered with ice (frozen moisture or nitrogen ice). Carefully remove the ice with warm helium gas over the helium flow system, using the dipstick or the precooling tube as tubing to remove small ice spots from the connector.
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kjonesSep 1, 2025
What to do if there is nitrogen ice in the helium vessel of Bruker Laboratory Equipment?
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  codydixonSep 2, 2025
  If nitrogen ice is present in the helium vessel of your Bruker Laboratory Equipment, it is likely due to the times between pumping and flushing being too long, where nitrogen boiled off during pumping and remaining nitrogen got frozen during flushing. Warm the magnet coil with warm helium gas using the precooling tube until the whole coil is at 90 K or above, repeat pumping and flushing, and use the dipstick to check that the helium vessel is empty (no liquid nitrogen or frozen nitrogen).
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perezrobertSep 2, 2025
What to do if the cooling of the magnet coil does not continue although helium is transferred in Bruker 700'54 Ascend Laboratory Equipment?
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  Brenda BondSep 2, 2025
  If the cooling of the magnet coil in your Bruker Laboratory Equipment does not continue even though helium is being transferred, the helium transfer line may be defective. Check the helium transfer line for ice; if there are visible cold spots, replace the helium transfer line. It could also be that the extension piece is not mounted on the helium transfer line, so mount the extension piece and ensure the helium transfer line is completely inserted into the siphon.
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pamela40Sep 3, 2025
What to do if the pneumatic isolator of the magnet stand does not reach the operating position on Bruker 700'54 Ascend?
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  dwatsonSep 3, 2025
  If the pneumatic isolator of the magnet stand for your Bruker Laboratory Equipment does not reach the operating position, ensure the pneumatic controller is in the UP position. Check the pressure of the gas supply, which must be in the range of 5 to 8 bar (70 to 112 psi). Stop the pneumatic isolators and check the level of the cryostat if the magnet system is not level. Finally, the leveling valve or membrane of an isolator may be defective, requiring replacement of the leveling valve or isolator.
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Jeffrey FrederickSep 4, 2025
What to do if the zero reading of the Helium Level Sensor cannot be adjusted at the beginning of cooling with liquid helium on Bruker 700'54 Ascend Laboratory Equipment?
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  Christopher HuertaSep 4, 2025
  If the zero reading of the Helium Level Sensor cannot be adjusted at the beginning of cooling with liquid helium in your Bruker Laboratory Equipment, check the connection in the helium fill-in turret between the Helium Level Sensor and the connector. If the connection is correct, the Helium Level Sensor may be defective; check it using the 0 % calibration plug.
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tritterSep 5, 2025
What to do if the helium flow system becomes very cold and icy during flushing with helium gas on Bruker 700'54 Ascend?
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  elizabethsmithSep 5, 2025
  If the helium flow system of your Bruker Laboratory Equipment becomes very cold and icy during flushing with helium gas, it is likely that liquid nitrogen remains in the helium vessel, boiling off strongly during flushing. Stop flushing, carefully remove all liquid nitrogen using the precooling tube, and use the dipstick to check that the helium vessel is empty (no liquid nitrogen or frozen nitrogen).
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taylorjessicaSep 5, 2025
What to do if the magnet system does not reach specification on Bruker 700'54 Ascend?
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  Jane MartinSep 5, 2025
  If the magnet system does not reach specification in your Bruker Laboratory Equipment, it could be due to magnetic material inside the RT bore tube; carefully clean the RT bore tube. Large ferromagnetic parts near the magnet system can also cause this; keep all ferromagnetic parts away from the magnet system as much as possible and repeat shimming.
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Brian HuntSep 6, 2025
What to do if the shim current cannot be set correctly on Bruker 700'54 Ascend?
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  kristen02Sep 6, 2025
  If the shim current cannot be set correctly on your Bruker Laboratory Equipment, ensure the control cable is correctly connected to the current lead and to the power supply. Also, check that the switch "Main Coil/OFF/Shim Coil" is in the correct position.