Re: [AMMRL] Helium Level Reading for Magnex Magnets with Bruker Consoles

From: Michael Groves via groups.io <mgrovesnmr=yahoo.com_at_groups.io>
Date: Sat, 15 Jun 2024 13:51:23 +0000 (UTC)

Hi,

There is an adapter cable and the part number (if you're interested) is B3672. 
If the magnex sensor is one that has two sensors--one with long active
length and one with short active length (p1 and p2), the Bruker adapter
is set up to measure the short sensor (P1 I believe).  
The other thing to worry about is the sensor calibration--the sensor resistance
when it's not in helium is some number of ohms per centimeter--so you need
some way to calibrate the 0% and 100% levels for the Bruker hardware.  
Usually this is done by an engineer with a variable resistor box that they
can use to set the resistance to the correct value for calibration. 
If that makes sense.

Cheers,Mike

    On Friday, June 14, 2024 at 08:51:15 PM MDT, dennisonpr wrote:

  Bruker used to supply short converter cables when the magnets were installed.

 Regards,

 Phil.

On 20240614 16:54, Jerry Hu wrote:

Dear AMMRL Colleagues,


I have a question about reading the helium level of a non-Bruker magnet,
such as a Magnex, with Topspin 3.x. I know that the wiring of the helium
sensors on Magnex magnets is different from that on Bruker magnets. I
would appreciate your input on how to accomplish this task.

Have a great weekend!

Cheers,
Jerry
 -----------------------------------------------
 Jerry Hu, Ph.D.
 Technical Director, Project Scientist
 Materials Research Lab, UCSB
 Santa Barbara, CA 93106
 Jerry.hu_at_ucsb.edu
 (805)893-7914 (office)
 (805)893-7940 (lab)

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Received on Sat Jun 15 2024 - 06:51:30 MST

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