Difference: OpenissuesArchive (1 vs. 2)

Revision 217 Nov 2005 - Main.MichaelGoger

 
META TOPICPARENT name="NmrStaffnotes"
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Closed Issues

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900 cryoplatform install

Issue Status Date Action takenup comments
installed OPEN 11/17/05 unit is completely installed 900#1 TCI cryoprobe is operational.
in progress OPEN 4/29/05 Outdoor/indoor units wired-up Need to finish running He-transfer lines and scafold. Boris and Mike.

800/US#2/NE sample get hung up at top of shim stack when eject air is turned off.

Issue Status Date Action taken comments
problem with sample lowering Closed 11/17/05 installed new BST on  
problem with sample lowering OPEN 6/17/05 installed new BST on This seems to have corrected the problem...We will keep this under observation for the next few days.
problem with sample lowering OPEN 5/31/05 Emailed Brian Lord at Bruker Brian is going to send out a new BST

900 conventional TXI probe 1H sensitivity

Issue Status Date Action taken comments
Poor 1H sensitivity CLOSED 6/7/05 Jeff Parent on-site to evaluate probe. Jeff was able to get lineshape to 4.7/11.1/ , 0.1%EB sensitivity numbers for 200Hz s:n is 2300:1 and water suppresion are, resolution 22%, s:n 407:1 and hump 44.8/107.2
Poor 1H sensitivity OPEN 6/1/05 Emailed Brian Lord at Bruker lineshape sample the non-spin numbers are 5.8/8.2/0.57, however the satellite peaks appear weak, 0.1%EB samples the best 200Hz s:n we get is 1745:1 (should be over 2000:1, Water suppression on 2mM sucrose: resolution is 15%, s:n is 364:1, and water suppression is 42/69. Brian has scheduled Jeff Parent to come in of 6/7 to evaluate the probe.
Poor 1H sensitivity OPEN 5/26/05 Emailed Brian Lord at Bruker 2mM Sucrose S:N ~312:1 down from 450:1/ We will make further attempts to shim the probe in.
 

800conv TXI cryoprobe

Issue Status Date Action taken comments
  CLOSED 5/12 05 TXI cryoprobe #025 installed and met specs.  
out-of-service OPEN 5/05/05 Bruker engineer scheduled to install loaner Probe Tue. 5/10/05  
out-of-service OPEN 4/29/05 Returned to Bruker for repair Expecting a loaner TXI probe.

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-- MichaelGoger - 06 Jun 2005

Revision 106 Jun 2005 - Main.MichaelGoger

 
META TOPICPARENT name="NmrStaffnotes"
Contents

Closed Issues

800conv TXI cryoprobe

Issue Status Date Action taken comments
  CLOSED 5/12 05 TXI cryoprobe #025 installed and met specs.  
out-of-service OPEN 5/05/05 Bruker engineer scheduled to install loaner Probe Tue. 5/10/05  
out-of-service OPEN 4/29/05 Returned to Bruker for repair Expecting a loaner TXI probe.

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-- MichaelGoger - 06 Jun 2005

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