Re: [AMMRL] AMMRL: Converting Varian/Agilent magnets to Bruker? Helium Sensors?

From: Spin-Doc <bert.heise_at_spin-doc.net>
Date: Wed, 5 Feb 2025 23:26:02 +0100

Dear Ken,

> First, Can someone with a 400/54 Varian/Agilent (probably Magnex actually)
> manget confirm that the helium sensor connects to the Black Plug?

Yes, it's the black plug. Attention: the pinout is different compared to
Oxford/Bruker magnets: While the latter use pins A/B/D/E, Varian/Agilent
magnets use pins A-D for probe 1 and E-J for probe 2 (with connections
V+, I+, V-, I- each).

> Second, I'm curious about experiences converting Varian/Agilent magnets
> to new Bruker systems? Have any of you had success with this?

No problem - Bruker did this many times. All you need are adapter plates for
the top and bottom flanges (which are a bit different in terms of hole diameters
compared to Oxford or Bruker magnets).

> Were you able to make things like N2 and He sensors work with their software/consoles?
> Or do you fly blind with Helium after the conversion?

Varian/Agilent magnets all have their standalone helium and nitrogen sensors -
no need to fly blind. But reading them out from the software is more difficult
(specifically the nitrogen meter), whereas I guess that plugging in the Bruker
console readout plug will not work without modifying the cable.

Cheers
Bert

>
> Specifically, we have 400/54 Premium Shielded Magnets.. (Magnex?)
>
>
> Ken Sharp-Knott
> Manager of Analytical Services and the NMR Facility
> Department of Chemistry=
> Virginia Tech
>
> (540)267-6502 (Cell)
> (540)231-0885 (Office)
>


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Received on Wed Feb 05 2025 - 14:27:01 MST

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