*We have a correction to our Cold Probe "premise." Clarification is
important:*
*If you run the cold probe to the end of the lifetime of the cold head, it will NOT require returning the probe to Varian for repair. They will just replace the cold head on site. A failure due to lifetime of the cold head should not damage any other part of the system according to the vendor.
*
*James Loo
NMR Facility Director
UCSC
Santa Cruz, CA 95064
*
*
> Another Survey:
>
> The 600MHz Varian 7700-CS Cold Probe system on our Inova 600 has been
> working for about a year. Among other factors, the 7700-CS
> Closed-Cycle Cryogenic System boasts a new robust CryoBay.
>
>
>
> We would like to get feedbacks from those who own the Varian 7700-CS
> Cold Probe system (or Bruker equivalent). Do you have a Service
> Contract for the whole cryo system or just the Cold Head? What
> problems are you experiencing?
>
>
>
> Our understanding is Cold Head maintenance (cleaning) implies complete
> Head replacement. That being the case, why not just operate the system
> for 2 years or until the Head fails? It doesn't cost any more -- we
> checked. And if it hasn't failed after two years, then the Cold Head
> and the Oil Absorber can be serviced at the same time. The down side
> of this scenario is the Probe must be returned to
> Varian. Institutions that are able to absorb being without the Cold
> Probe for a month or so could potentially save a bunch of money. A
> full Service Contract costs about $30,000.00 dollars/year.
>
> We will post summaries.
>
> Mary Howe
>
> NMR Facility
>
> UCSC
>
> Santa Cruz, CA
>
*
--
--
=======================================================================
_/
_/_/_/_/_/_/_/ As Zeus said to Narcissus, "Watch Yourself"
_/ _/ loo_at_chemistry.ucsc.edu
_/ _/ http://www.nmr.ucsc.edu
_/ _/ (831) 252-7247
_/ _/ _/ (831) 459-2485
_/ _/ _/_/_/_/_/ (831) 459-4923 Lab
_/_/_/_/ (831) 459-2935 Fax
=======================================================================
Received on Wed Jun 24 2009 - 14:23:06 MST