RE: AMMRL: How to retrieve empty spinners

From: Stolowich,Neal J. <stolowich_at_louisville.edu>
Date: Tue, 15 Nov 2011 21:03:30 +0000

In my experience, cranking the sample lift air up usually does not work with the heavier Varian spinners and most probes, but I haven't tried cranking up the VT air as well. But one question- don't you worry about possible effects to the VT dewar and probe glass inserts by that amount of air flow going through the probe, instead of from above the probe?

Cheers!

Neal J Stolowich, Ph.D.
NMR Facilities Manager
Department of Chemistry
University of Louisville
Louisville, Kentucky 40292
Office: (502) 852-7894 Fax: (502) 852-8149




-----Original Message-----
From: Scott Burt [mailto:scott.r.burt_at_gmail.com] On Behalf Of Scott Burt
Sent: Tuesday, November 15, 2011 12:00 AM
To: AMMRL
Subject: Re: AMMRL: How to retrieve empty spinners

        I'm surprised no one has mentioned the easiest method of getting the empty spinner out of the upper barrel: simply crank the VT air up to 30 or 40 and the spinner floats up just fine without any of the complicated methods suggested earlier.

        We have enough undergraduate researchers and undergraduate labs using our 300 MHz Inova that I end up doing this once or twice a month. I've had to do this at least once or twice on our 500 MHz Inova as well. This should not be a complicated or time consuming endeavor; just use the VT air and your back in business in less than 30 seconds.

-Scott

---
Scott Burt
Assistant Teaching Professor
NMR Facility Manager
Department of Chemistry and Biochemistry Brigham Young University C008A BNSN Provo, Utah  84602-5700
Phone:  (801) 422-2404
Fax: (801) 422-0153
email: scott_burt_at_byu.edu<mailto:scott_burt_at_byu.edu>
On Nov 14, 2011, at 12:58 PM, Rudi Nunlist wrote:
> Another way is to use a round wooden dowel. Those were used quite frequently.
> The UCB wood shop has some that fit an empty spinner bore pretty well.
> Hardware or hobby stores might have them as well.
>
> For the reverse situation, where users forget the spinner and drop the
> sample into the magnet, the same dowels and a loop of double sided
> tape works for fishing the sample out.
>
> Both methods had to be used more than once, they are well tested.
>
>
> Best Regards,
>
> Rudi Nunlist
>
>
> ------ On Sun November 13 2011 11:43, gozim_at_nmr.uni-frankfurt.de<mailto:gozim_at_nmr.uni-frankfurt.de> wrote:
> =Spinlanders,
> =
> =before you start to dismount your probe holder to fetch an empty
> =spinner (without a tube) try the following:
> =Insert the next sample as usual, and lift it again.
> =
> =Have a good field,
> =
> =JGZim
> =
> =
> =
> =
>

Received on Tue Nov 15 2011 - 11:03:53 MST