Good point, Steve. Minor adjustment in the procedure takes care of it. Thanks for the comment.
Regards, Don Umbdenstock Sensormatic > ---------- > From: [email protected][SMTP:[email protected]] > Reply To: [email protected] > Sent: Thursday, February 27, 2003 12:48 PM > To: [email protected] > Subject: Re: dmax test > > > Annex B of EN61000-3-3 says that both the switch on and switch > off events should occur during each of the 1 minute tests. > > Steve Seller > York EMC Services > > > On 25 Feb 03, at 9:26, [email protected] wrote: > > > > > > > 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? > > > > Don Umbdenstock > > Sensormatic > > > DISCLAIMER NOTICE http://www.yorkemc.co.uk/Disclaimer > > > > York EMC Services, Market Square, The University of York, > Heslington, York, YO10 5DD. > VAT Reg No: GB 647 2055 41 > Company Reg No: 3075474 > York EMC Services Ltd is a Company limited by guarantee and not > having share capital. > > ------------------------------------------- > 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: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > 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 > 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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
