Mr Jenson - I agree with Bill's input. When I do in house validation I will usually go to 10kV (or K) - 12kV for a test level. The standard we use is EN 60601-1-2 (medical electrical equipment) which states 3kV contact discharge and 8kV air discharge. These values are way too conservative for our Minnesota winters, when the air is dry and one can easily generate voltages up into the 10k - 12k range. I've witnessed many of our older products that would pass the requirements for the DoC but would fail once placed in the field if we followed the standards test level requirements. I highly recommend to test to as many "user contact" test points as deemed appropriate, use higher test levels than the standards specify and if questionable results - test at more than 10 discharges per test point. Assure that all interface cables are connected to the EUT and opposite end terminated if required. Cables with a marginal shielding design can have a big impact on the results. Also assure that you perform ESD discharges to the horizontal and vertical planes. I have seen devices pass the contact discharge ESD events but fail when performing the vertical coupling plane tests. Good Luck!
-----Original Message----- From: Jacowleff, Bill [mailto:[email protected]] Sent: Monday, January 17, 2000 7:43 AM To: '[email protected]'; [email protected] Subject: RE: EN 61000-4-2 Dear Mr. Kim Boll Jensen: Well the answer to your question is 10 discharges to each point per polarity. A few other things to consider. It is also important to step through the voltages and not skip any. Is your internal test procedure going to be used as a supporting test for a DOC or is it for a DV or PV? If it is a Design validation it is quite possible to want to exceed the specs per the standard, it all depends on what you expect to learn from this type of testing. The Design Validations I have composed for ESD have exceeded the standard specifications. Best Regards, Bill Jacowleff VDO Control Systems Airpax Instruments 150 Knotter Drive Cheshire, CT 06410 Phone: 203 271-6394 FAX: 203 271-6200 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Monday, January 17, 2000 5:41 AM To: [email protected] Subject: EN 61000-4-2 Dear all I'm writing on a internal testprocedure for our products, and have now come to EN 61000-4-2 ESD. What confuse me is that the standard (as I read it) only refere to 10 discharges at each point (and each polarity), but I have been told from several different persons that the right number is 50 at each points (but without any reference to any standard). Do anynoe know what the right number is and where I can find it Best regards, Mr. Kim Boll Jensen i-data international Denmark --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
