AMMRL: Sudden increase in magnet drift -- inova 500 CA 1998

From: Harker,Robert A <rharker_at_chem.ufl.edu>
Date: Mon, 17 Oct 2016 21:28:05 +0000

Dear AMMRL;

Full rebuild of the magnet in July 2015.

Measured 4.882 Hz/Hr. May 16, 2016.

Plotted the lockfreq vs date from before we reenergized it till now. Attached.

What could have caused such a sudden decrease in lockfreq? I'm still gathering data such as boiloff logs and a new drift rate which I'll update later.

Thanks,


[cid:image003.jpg_at_01D2289B.D0ED4BE0]<http://chem.ufl.edu/~nmr>


ROBERT A. HARKER
Engineer

University of Florida
Dept. Chemistry, Nuclear magnetic Resonance Labs,126 Sisler Hall
GAINESVILLE, FL 32611-7200
USA<http://maps.yahoo.com/py/maps.py?Pyt=Tmap&addr=Dept.+Chemistry%2C+Nuclear+magnetic+Resonance+Labs%2C126+Sisler+Hall&csz=GAINESVILLE%2C+FL+32611-7200&country=us>

rharker_at_chem.ufl.edu<mailto:rharker_at_chem.ufl.edu>

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352-392-4650
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image003.jpg
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Received on Mon Oct 17 2016 - 11:27:59 MST

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