Joe, More data will be required before the group would be able to help with a diagnosis. You say that each instrument is on it's own line. Are you referring to an ac power line? Also:
Is each instrument provided with it's own isolated ground receptacle? Are they networked? If so, is the connection copper or optical? Are the instruments microprocessor based? Is there a central device (PC) controlling them? Are all devices exhibiting these symptoms, or just a few? Do they shut down while doing something, or when sitting idle? I would suggest keeping a log of events, with each machine assigned a number, in order to create a matrix showing which machine shut down, when it shut down, what else was happening, etc. I understand the need to maintain confidentiality of proprietary information, but it should be possible to provide some generic data. Scott Lacey -----Original Message----- From: marti...@pebio.com [SMTP:marti...@pebio.com] Sent: Tuesday, September 07, 1999 5:04 PM To: emc-p...@majordomo.ieee.org Cc: marti...@pebio.com Subject: Immunity Problems ?? EMC Professionals, We have 42 of the same instruments installed in one laboratory. They are each installed on their own dedicated line. On a regular basis, an instrument will shut down during a run. The instrument that shuts down is different each time. These instruments are laboratory equipment that meet Class A radiated limits of EN 55011 and meet the immunity requirements of EN 50082-1. Any ideas as to the potential cause of the problem and possible ways to resolve the problem would be greatly appreciated. Regards Joe Martin EMC/Product Safety Engineer P.E. Biosystems marti...@pebio.com --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).