[Histonet] RE: haunted Cryostat

Reynolds,Donna M dreynold <@t> mdanderson.org
Wed Mar 31 14:25:16 CDT 2010

We had the same problem with our Leica 3050S. It happened occasionally then became more and more frequent. We went through a lot of the same hoops you have gone through. When it shut down one day while I was cutting I knew it had to be a machine malfunction. Leica replaced something that was connected with the arm that holds the block and then goes to the power. This was about 13 months ago and I am afraid it is starting it again. I come in and the computer panel says "Power Failure" but it is still cooling. I think this is how it started out last time. In the beginning I figured we had had an electrical outage or someone was messing with it at night.  


Message: 3
Date: Mon, 29 Mar 2010 15:20:35 -0400
From: mtitford <@t> aol.com
Subject: [Histonet] Is my Leica CM 1850 cryostat haunted?
To: Histonet <@t> pathology.swmed.edu
Message-ID: <8CC9D8C0AA7A02F-B40-5D8F <@t> webmail-m081.sysops.aol.com>
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We have a Leica CM 1850 cryostat that about once every three weeks to a month, turnes itself off! Has anyone else experienced this? How do I fix it?

Initially, we thought someone after hours was turning it off, maybe someone in housekeeping or a passing med tech. That was not the case.
Later our Biomedical people replaced a capacitor or something in the bowels of the cryostat thinking that may be faulty and contribute to the problem. That did not help either.
Still later, the cryostat was put on its own circuit (No help), and then after that, we tried an uninterruptible power source thinking minor power fluctuations were the cause (no help either).

Anyone know how to fix this problem?. It is disconcerting to walk into the lab in the morning and the cryostat is at room temperature and the OR is going to have a busy day.

Michael Titford
Pathology USA
Mobile AL


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