Hi Frank,
> Am 08.05.2025 um 06:54 schrieb Frank Bennis via groups.io <fjbennis=gma=
il.com_at_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 formati=
on 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 s=
ink). 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 th=
e green tubing which normally wouldn't point to a leaky O-ring at the botto=
m...
Cheers
Bert
>> On May 7, 2025, at 9:31 PM, Spin-Doc via groups.io <bert.heise=
=spin-doc.net_at_groups.io> wrote:
>>
>> Hi,
>>
>> This may be an indication that one (or more) of the other nitrogen exhau=
sts 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 ex=
haust a good way to get rid of it is by blowing nitrogen gas into the exhau=
st 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 pu=
sh 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: https://urldefense.com/v3/__http://www.spin-doc.net__;!!PvDODwlR4mB=
ZyAb0!TbmB15NItWxLXyzyvUMPwhnnhBj9nLZQNBxF_8ZAfdGjSd8SX-jXOFGIpLmZ0JN9LHty8=
hRV33CclMrfgSsqsA$
>> 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 <seb14=will=
iams.edu_at_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 (West=
ern Massachusetts) so I am just thinking some condensation formed on the li=
ne, 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 con=
tact 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 y=
ou 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
>>> <PXL_20250507_212006196.jpg>
>
>
Magnetic resonance equipment, service, training & more
Selling & buying used NMR equipment (all vendors)
Dr. rer. nat. Bert Heise
Owner, Applications Scientist
Spin-Doc Bert Heise
Kiefernweg 13
58239 Schwerte
Germany
Mobile: +49 171 5135315
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