I read in !emc-pstc that djumbdenst...@tycoint.com wrote (in <846BF526A2 05F84BA2B6045BBF7E9A6A0532B31F@flbocexu05>) about 'dmax test' on Tue, 25 Feb 2003: >We have a HP HFTS (harmonic and flicker test system) 6843A that runs the >original flicker tests. Now 61000-3-3 requires a measurement of dmax 24 >times, taking the average of 22 readings. We have come up with a way to do >that manually using the HFTS. I would like to present it to the group and >see if anyone sees an oversight or a better way of doing it. I suspect the >program is the same whether you have the 1kva model or the 5kva model 6843A. > >a) Create an Excel "template" to record 24 points of data. Create a formula >that sums the 24 values, subtracts the max and min, and divides the result >by 22. This value is the average dmax required by the amendment. >b) Set up the HFTS as follows: > Integration Periods: 1 > PST Int Time: 1 minute > Measurement Delay: 0 seconds. >c) Start the HFTS Voltage Fluctuation test with the EUT off. >d) After several seconds, manually turn on the EUT. >e) At the conclusion of the 1 minute test, record the dmax value reported >by the HFTS on the excel worksheet. >f) Turn off the EUT >g) Repeat steps c) to f) 24 times. >h) Compare the dmax value reported on the work sheet to the appropriate >limit in 61000-3-3, Amendment 1, 2001. > >This approach requires manual intervention and takes approximately 1/2 hour. >It appears to address the requirement of the amendment without requiring >modification to the unsupported test equipment. > >Comments?
I will forward you message to someone who is in a VERY good position to advise, but whose name I may not reveal. Watch this space. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
