Hi Jessi,
Thanks for the reminder of this! It's been years since I last cleaned that
valve that I forgot! After cleaning, the spinning is working as expected,
and I've noted this as one more thing to check for future spinning issues!
Best,
Jon
________________________________
> From: main_at_ammrl.groups.io on behalf of Jessi Baughman via groups.io
> Sent: Thursday, August 6, 2026 12:29 PM
> To: main_at_ammrl.groups.io
> Subject: [EXTERNAL] Re: [AMMRL] Varian Mercury 400 Not Spinning #Hardware #NMR_Liquids #Troubleshooting #varian #VarianAgilent
Hi Jon,
Aside from verifying pneumatic pressure and flow rate, there is a solenoid
valve in the leg that regulates the spin (Clippard Minimatics EV-2-24). It
can become dirty and/or the diaphragm inside it can crack and lose its ability
to operate. When you start the spinning, you should hear one louder click
followed by softer clicks roughly at the spin rate. If not, you can close
the air supply and then carefully twist it open (to not lose the washer
and diaphragm inside) and clean it if the diaphragm is still in good shape
(no split legs). Once reassembled, that might bring it back to life if it
was just blocked by dust. Otherwise, replacements aren't too expensive from
eBay or online retailers.
Best,
Jessi Baughman
Scientist Senior, Metrology * Akron
The Goodyear Tire & Rubber Company
142 Goodyear Blvd, Akron, OH 44305
Office: +1 330-796-5339
jessi_baughman_at_goodyear.com
> From: main_at_ammrl.groups.io On Behalf Of foglein via groups.io
> Sent: Thursday, August 6, 2026 10:03 AM
> To: main_at_ammrl.groups.io
> Subject: [EXT] [AMMRL] Varian Mercury 400 Not Spinning #Hardware #NMR_Liquids #Troubleshooting #varian #VarianAgilent
We have a Varian Mercury plus 400 MHz system with an Oxford magnet. Mostly,
this system sits idle waiting until our newer Bruker system becomes inoperable.
Yesterday, we were unable to get the sample to spin at all. I've removed and
cleaned the upper barrel, removed and checked the probe for debris or broken
tubes that would bind the spinning, and tried multiple spinners that have worked
in the past, making sure they were clean and undamaged. I am unsure what to
check next, so I would appreciate any advice.
Best,
Jon
--
Mr. Jonathan Foglein
Instrument Coordinator/
Chemical Hygiene Officer
Rowan University
Department of Chemistry & Biochemistry
Science Hall, Room 345
201 Mullica Hill Road
Glassboro, NJ 08028
Phone: 856-256-5456
Email: foglein_at_rowan.edu
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Received on Sat Aug 08 2026 - 14:52:44 MST