Date: Thu, 8 May 2025 13:29:21 -0400
Hello everyone,
Thank you for your responses.
It seems the consensus is that this is something to look at but not
something that may even be an issue.
I will say for context we are looking to replace the system in 2 to 3
years. So even if this is a sign of a problem developing years down the
line we may be able to get away with just monitoring. to make sure the
hoses have not failed and holding.
Thank you everyone we appreciate it here.
Sincerely,
Silas
On Thu, May 8, 2025 at 1:07 PM Spin-Doc via groups.io wrote:
> Hi Frank,
>
> Am 08.05.2025 um 06:54 schrieb Frank Bennis via groups.io
>
> Another thing to check is the oring
> Inside the black radiator if it doesn’t seal And the humidity is high you
> can get ice. May want to add a little
> Vacuum grease on the o-ring or tip of N2 port.
>
>
> While I totally agree that a leaky or broken (from the constant pulling
> off of the heat sink at each nitrogen refill…) can lead to ice formation on
> a heat sink, that ice will form at the bottom of the heat sink where the
> cold nitrogen will vent off (instead of through the top, pas the heat
> sink). This indeed is often the reason of ice formation - but at the bottom
> only.
>
> If I saw it correctly, the picture shows ice formation at the top around
> the green tubing which normally wouldn't point to a leaky O-ring at the
> bottom...
>
> Cheers
> Bert
>
> On May 7, 2025, at 9:31 PM, Spin-Doc via groups.io wrote:
>
>
> This may be an indication that one (or more) of the other nitrogen
> exhausts is blocked with ice from air moisture. You should remove all heat
> sinks and check for uneven or stopped nitrogen exhaust. If you find a
> blocked exhaust a good way to get rid of it is by blowing nitrogen gas in to
> the exhaust using a thin tube, for example the helium dipstick. This should
> melt the ice which ejects as droplets of water - much better than using
> force to push the ice block into the nitrogen dewar.
>
> Best regards
> Bert
>
> -> Sent via mobile <-
>
> Spin-Doc
> Magnetic resonance equipment, service, training & more
> Dr. rer. nat. Bert Heise
> Owner, applications scientist
> Kiefernweg 13
> 58239 Schwerte
> Germany
> Web: http://www.spin-doc.net
> Mail: bert.heise_at_spin-doc.net
> Phone: +49-171-5135315
>
> Representing MestreLab, Stelar & Barthel HF
>
>
>
> Am 08.05.2025 um 07:27 schrieb Brown, Silas via groups.io
>
>
> Hello Everyone,
> We noticed today that we have some ice on the exterior of the nitrogen
> exhaust line (500 MHz Bruker Ultrashield) see photo attached. I just wanted
> to make sure this is not something I should be concerned about.
>
> It's warming up and we have had a lot of rain these past few days (Western
> Massachusetts) so I am just thinking some condensation formed on the line,
> and since it is near the metal nut connection to the green tube it got
> colder than anywhere else so ice formed.
>
> Additional context,
> I do not feel any flow of nitrogen near the connections when the ice is
> removed.
> A nitrogen fill was done today, the day the ice was noticed.
> We had a normal amount of helium use from last week.
>
>
> I just wanted to reach out to the minds of AMMRL to see if I should
> contact Bruker about this or if I can tell people its okay.
>
> Sincerely,
> Silas
>
>
> P.S.
> Thank you everyone who responded to my last question, sadly by the time I
> received the emails I had restarted the system and it cleared the error. If
> the issue of the acquisition running message appears again I will let you
> know how that goes.
>
> --
> *Silas Brown **(He/Him)**, Instrumentation Specialist *
> Department of Chemistry
> Williams College
> 150B Morley Science Laboratories
> Williamstown, Ma. 01267
> E: seb14_at_Williams.edu | P: 413.597.3544
>
>
>
> *Magnetic resonance equipment, service, training & more*
> Selling & buying used NMR equipment (all vendors)
> *Dr. rer. nat. Bert HeiseOwner, Applications Scientist Spin-Doc Bert
> HeiseKiefernweg 1358239 SchwerteGermanyMobile: +49 171
> 5135315Email: bert.heise_at_spin-doc.net <bert.heise_at_spin-doc.net>*
> *Web: http://www.spin-doc.net
>
>
>
>
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