Brian, I would vote for Group 2 too. The "high voltage DC sputtering", "arcing or sparking", and associated RF radiated emissions -- as a whole package -- should be considered being intentionally designed for the working object --the metal specimen.
Regards, Barry ---------- Original Text ---------- From: "Brian At Work" <bkundew...@qtm.net>, on 10/11/99 6:51 AM: Barry and all, My confusion in understanding the EN55011 classification for group 1 and group 2 has to do with the phrase "in which radio-frequency energy is intentionally generated". I can see how a microwave or an induction furnace would satisfy this description, but I was confused where it listed "Spot Welders". Spot Welders are usually not operated by RF frequencies. Usually they run at line frequency or DC. I guess I wasn't thinking that generating a spark (such as with a DC welder) would be intentionally generating RF which I assume would also satisfy the Group 2 classification. Our company makes a metal analysis instrument that uses high voltage DC to perform a 'sputtering process which is a type of arcing or sparking. My questions on this subject was for the purpose of trying to determine if it would fall under the Group 2 classification. My current thinking is that it would. Let me know if you disagree. Thanks, Brian Kunde LECO ----- Original Message ----- From: Bailin Ma <b...@anritsu.com> To: Brian At Work <bkundew...@qtm.net>; IEEE Group <emc-p...@ieee.org> Sent: Friday, October 08, 1999 6:07 PM Subject: re: EN55011 Group 1 and Group 2 Brian, Here is my two cents worth: RF energy generated by Group 1 is intentionally only for internal function. And Group 2 intentionally generates RF for their working objects. Thus an electronic microscope (which is not a "smaller bench type test equipment" -- see your Email) falls under Group 1. On the other hand, microwave oven and RF medical therapy belong to Group 2. Please correct me if I'm confused. Barry Ma Anritsu Co. Morgan Hill, CA 408-778-2000 ---------- Original Text ---------- From: "Brian At Work" <bkundew...@qtm.net>, on 10/8/99 12:06 PM: Hello Group, For those of you who are familiar with EN55011 or CISPR11 what criteria is used to determine if a product falls under Group 1 or Group 2? The standards give some examples of product types but there should be a base criteria which was used. Group 1 products seem to be smaller bench type test equipment like signal generators, spectrum analyzers, and such. Group 2 seems to be products that generate a spark or uses RF in some way to heat, melt, or spark erode. The gap between these two groups seem to be wide which leaves a very large gray area. Is there a defined criteria that exists? Please feel free to give me your thoughts so we can draw up our own criteria if necessary. Thank you in advance, Brain Kunde Compliance Testing Center LECO Corp. --------- 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). --------- 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).
