Hello Charles,
No – Quote from IEC 61000-4-3, §8 Test procedures 3rd and 4th paragraph: Before testing, the intensity of the established field strength shall be checked by placing the field sensor at a calibration grid point, and with the field generating antenna and cables in the same positions as used for the calibration, the forward power needed to give the calibrated field strength can be measured. This shall be the same as recorded during the calibration. Spot checks shall be made at a number of calibration grid points over the frequency ranges to be considered. Both polarizations shall be checked. After the calibration has been verified, the test field can be generated using the values obtained from the calibration (see 6.2). Unquote Br Helge Knudsen Bolls Rådgivning Denmark From: [email protected] [mailto:[email protected]] On Behalf Of Grasso, Charles Sent: 28. september 2011 17:00 To: ce-test, qualified testing bv - Gert Gremmen; Brent G DeWitt; Kunde, Brian; [email protected] Subject: RE: [PSES] BS EN61000-4-3 and calibrated fields. But is that REQUIRED in 61000-4-3? Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) [email protected] <mailto:[email protected]> (e) [email protected] <mailto:[email protected]> (e2) [email protected] <mailto:[email protected]> From: [email protected] [mailto:[email protected]] On Behalf Of ce-test, qualified testing bv - Gert Gremmen Sent: Wednesday, September 28, 2011 12:30 AM To: Brent G DeWitt; Kunde, Brian; [email protected] Subject: RE: [PSES] BS EN61000-4-3 and calibrated fields. EUT has big impact on local field. Field NEEDS to be leveled without EUT. Regards, Ing. Gert Gremmen, BSc [email protected] www.cetest.nl Kiotoweg 363 3047 BG Rotterdam T 31(0)104152426 F 31(0)104154953 Before printing, think about the environment. Van: [email protected] [mailto:[email protected]] Namens Brent G DeWitt Verzonden: Wednesday, September 28, 2011 1:21 AM Aan: 'Kunde, Brian'; [email protected] Onderwerp: RE: [PSES] BS EN61000-4-3 and calibrated fields. We have done this at several labs I work for, but it was always just a sanity check to make sure that neither the amplifier nor cables to the antenna had failed. It is totally useless as a function for leveling for commercial immunity measurements. Best regards Brent From: Kunde, Brian [mailto:[email protected]] Sent: Tuesday, September 27, 2011 8:19 PM To: [email protected] Subject: Re: [PSES] BS EN61000-4-3 and calibrated fields. Not to hijack this thread, but why do some test labs setup the Field Probe in the chamber next to the EUT during the test? The measurement with the EUT in the field should be all over the place and would have little value. Am I missing something or are some labs leveling off the Field Probe during testing? From: [email protected] [mailto:[email protected]] On Behalf Of Ian White (UK) Sent: Tuesday, September 27, 2011 6:00 AM To: IEEE Forum ([email protected]) Subject: BS EN61000-4-3 and calibrated fields. Could you please help: Could you explain what is the correct procedure when using an anechoic chamber which is calibrated and operating to EN61000-4-3. During calibration of the chamber, a calibration file is made and it is assessed according to the guidelines laid down under BS EN61000-4-3. During calibration the chamber is empty. During a normal test run a UUT is put into the chamber. The questions is : a) Do you use the calibration file as the starting point and adjust the field strength which may have changed due to the UUT being in the chamber. b) Just take the calibration file and run it and except the filed strengths would have changed due to the UUT being in the chamber. Thanks Ian White Compliance and Reliability. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. 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