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
Received on Tue Jun 23 2009 - 11:51:40 MST