I am still seeing problems with the cryobay on our Varian 800 MHz
cold probe which do not exist on our older Varian 500 MHz cold probe
and was wondering if anyone else had seen issues like this. Specifically
today we found the 800 MHz cryobay in fault mode with the error in the log
window of....
Error 5013 occured at an undentified location. Possible reasons
Fault: low cooling power.
The probe was still cold but no heater current was being applied so
that the temperature was 18K. Power cycling the Oxford controller
on the cold probe did not bring the heater current back on line.
I had to exit the Cryobay Monitor software, restart it and then
click on the Start button in the Cryobay Monitor (with the cooling
loops set to zero). This immediately brought back the heater
current.
Varian seems to believe that the computer has lost contact with
the Oxford controller. The one difference between the older cryobay
which never acts up and the new one is that the old one has an APC
UPS and the new one has a Powerware UPS. Has anyone noticed the
Powerware UPS units being problematic compared to the APC model?
Apparently Varian has switched to the Powerware UPS for the newer
cryobays so we seem to be stuck with that model.
Thanks in advance for any comments.
Jack
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Jack W. Howarth, Ph.D. 231 Albert Sabin Way
NMR Facility Director Cincinnati, Ohio 45267-0524
Dept. of Molecular Genetics phone: (513) 558-4420
Univ. of Cincinnati College of Medicine fax: (513) 558-8474
Received on Tue Jul 25 2006 - 18:21:35 MST