Commercial EMI test software, need opinions on
Forum Members, I am assisting in choosing automated software control for an EMI test facility. I’m old school – REAL old school – and am unfamiliar with any of the following: ETS Lindgren – TILE http://www.ets-lindgren.com/page/?i=Tile Teseq – Compliance 3 http://www.teseq com/com/en/products_solutions/emc_radio_frequency/software/index.php?navid=37 CKC – EMI Test http://www.ckc.com/emitest.asp If any of you have experience with any of these, or others, positive or negative, please let me know off-line. Thank you, Ken Javor Phone: (256) 650-5261 - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Requirements for Power On/OFF Switch...US and EU Europe
Hello Christine, No violation at all. IEC/EN 60950-1/UL60950-1/CSA C22.2 60950-1 allow the plug on the power supply cord or the appliance coupler to serve as a disconnect. For your info, most swithes on ITE equipment are single pole - they are not double-pole and do not have the 3 mm contact gap to qualify them as a disconnect device to shut off the system for servicing. Best Regards, Peter --- On Mon, 7/21/08, Christine Rodham chrisrod...@yahoo.com wrote: From: Christine Rodham chrisrod...@yahoo.com Subject: Requirements for Power On/OFF Switch...US and EU Europe To: emc-p...@ieee.org Date: Monday, July 21, 2008, 11:17 AM Hi List Members, We purchased a networking product that will reside in the Customer Premise ( CPE) environment. ( FCC class A in the US ) We noticed that the unit DOES NOT have a power switch or a mains disconnect. In order to turn the unit off you have to pull out the plug from the unit or the wall. This units runs on 120V- 220V auto-range. Does this violate any safety rules in the US or Europe? The unit has an NRTL mark on it but is seems a little bizarre that it does not have a way of disconnecting power other than pulling out the plug. Anyone have any clarification on this.. Thank you! Christine Rodham - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: IEC 62368
In message 000e01c8eb7d$615b4570$7200a8c0@PC323541548743, dated Mon, 21 Jul 2008, 'Rich Nute' rn...@san.rr.com writes: Once you understand the concepts, the new standard is not radical. I think the situation is far more complex than can be embraced in a simple statement. There is a question about what 'radical' means, anyway. It is a new and logical way of thinking about safety. Once this new way of thinking is mastered, safety becomes an engineering discipline, much less arbitrary, and not a standards check-off process. In my opinion, there is little 'wrong' and very much that is 'right' abut the hazard-based principle (HBP). But its adoption is only one aspect of the new standard. It would be misguided to criticize the standard just because it adopts the HBP. During the development of the standard, it has been opined by people not involved in the development of the standard who have spoken to me about it that: - the HBP is not applicable to every type of hazard, or not applicable in a simple way; - where it is applicable, the HBP does not, in all cases, give detailed guidance right down to detailed requirements, leaving an opening for arbitrary, or at least unjustified, requirements to be adopted; - where the application of the HBP to certain hazards has resulted in much controversy, those hazards have simply been eliminated from the current drafts, which is not a satisfactory solution; - the development of the standard has been severely compromised by the timetable imposed by the IEC management on standards development, which are probably valid for a 'normal' standard development, but for such a large and complex project should not have been applied (exemptions are allowed under IEC rules if applied for at the required stages in the development); - the requirements that have been chosen in order to respect the application of the HBP are not the only possible requirements that would respect it, others would be more appropriate and easier to implement; - the detailed implementation of the HBP to some hazards has led to different and far more stringent requirements than are in 60065 or 60950-1, whereas those standards are found by experience to ensure a satisfactory level of safety. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list.Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald:emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: THERMOCOUPLE WELDER
Hi, For historic interest. Way back in the early 1970's I was employed by a company that made thermocouples. The smallest was 0.5mm diameter and was sheathed in stainless steel. The actual thermocouple wires were insulated from the sheath and themselves by magnesium oxide. We also designed, built and operated a capacitor discharge welder (CDW) to make the thermocouples. We would start with the raw cable on a reel and cut to length. We would then (using a microscope to view what we were doing) clean the area around the thermocouple wires, removing the MgO to expose sufficient to weld and the wires pushed together. The other end of the thermocouple wires were connected to the return of the CDW and then the capacitors were charged to the correct value. The welding torch was aligned with the thermocouple wires and argon gas was started to form an inert shield around the weld area. The discharge was executed and the weld inspected for quality and to make sure that the weld is inside the sheath. The final stage was to back-fill the sheath with MgO and fit a stainless steel cap over the (now insulated) thermocouple junction. The CDW was used to weld the cap in place. The cold end was terminated with flexible tails and encapsulated in a water-tight seal. These were used in nuclear power stations. The surprising thing to me was how little your hands would shake when working under the microscope ! The name of the company was BICC Pyrotenax. Regards Tim Tim Haynes A1N21 Electromagnetic Engineering Specialist SELEX Sensors and Airborne Systems 300 Capability Green Luton LU1 3PG ( Tel : +44 (0)1582 886239 7 Fax : +44 (0)1582 795863 ) Mob: +44 (0)7703 559 310 * E-mail : tim.hay...@selexgalileo.com P Please consider the environment before printing this email. There are 10 types of people in the world-those who understand binary and those who don't. J. Paxman From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Nick Williams Sent: Monday, July 21, 2008 8:47 PM To: Bolintineanu, Constantin Cc: emc-p...@ieee.org Subject: Re: THERMOCOUPLE WELDER *** WARNING *** This mail has originated outside your organization, either from an external partner or the Global Internet. Keep this in mind if you answer this message. It never occurred to me that someone might make a special gadget for this job - I just use our workshop oxy-acetylene torch! Nick. At 15:04 -0400 18/7/08, Bolintineanu, Constantin wrote: Dear Colleagues, I would like to kindly ask you in regard to the THERMOCOUPLES WELDERS that you are using. Information regarding the suppliers, and best performances and reliability, with not to many headaches are very much appreciated. I must admit that what we found is not an approved type... I would prefer to understand which is the best solution without using too many consumables. Please accept in advance my many thanks for your replies. Respectfully yours, Constantin Constantin Bolintineanu P.Eng. TYCO SAFETY PRODUCTS CANADA 3301 LANGSTAFF Road, L4K 4L2 CONCORD, ONTARIO, CANADA e-mail: cbolintine...@tycoint.com Tel: 905 760 3000 ext 2568 Fax: 905 760 3020 - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list.Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald:emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc SELEX Sensors and Airborne Systems Limited Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL A company registered in England Wales. Company no. 02426132 This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list.Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell
Re: Commercial EMI test software, need opinions on
Hello Ken, Tile is good; I have used that before and since Lindgren took over it is fully supported once again. Another consideration might be the Rohde Schwarz EMC32. Reasonable cost; great support; easy to use (in my opinion) and they can support many types of older equipment. Thank you. Rob Kado EMC Engineer - Module Laboratory Operations Chrysler CIMS 481-47-20 800 Chrysler Drive Auburn Hills, MI 48326 Desk: (248) 576-6915 Mobile: (248) 467-0639 Fax: (248) 576-7045 Ken Javor ken.ja...@emccompliance.com Sent by: emc-p...@ieee.org 07/21/2008 11:59 PM To Untitled emc-p...@ieee.org cc Subject Commercial EMI test software, need opinions on Forum Members, I am assisting in choosing automated software control for an EMI test facility. I’m old school – REAL old school – and am unfamiliar with any of the following: ETS Lindgren – TILE http://www.ets-lindgren.com/page/?i=Tile http://www.ets-lindgren.com/page/?i=Tile Teseq – Compliance 3 http://www.teseq com/com/en/products_solutions/emc_radio_frequency/software/index.php?navid=37 http://www.teseq.com/com/en/products_s lutions/emc_radio_frequency/software/index.php?navid=37 CKC – EMI Test http://www.ckc.com/emitest.asp http://www.ckc.com/emitest.asp If any of you have experience with any of these, or others, positive or negative, please let me know off-line. Thank you, Ken Javor Phone: (256) 650-5261 - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: PSE---energy density 400 watts per liter
On Tue, 22 Jan 2008 20:28:53 +0900 (JST), vef00...@nifty.ne.jp (T.Sato) wrote: Li-ion batteries with energy density 400 Wh/L or larger are planned to be covered by the DENAN (PSE) Law. The new regulation is still in draft, and planned to be take into effect in 20th November this year. Japanese DENAN (PSE) Law now covers Li-ion batteries. See following URLs for the English translation of the regulations: http://www.meti.go.jp/policy/consumer/seian/denan/lithium/080703/law.pdf http://www.meti.go.jp/policy/consumer/seian/denan/lithium/080703/cabinet_order.pdf http://www.meti.go.jp/policy/consumer/seian/denan/lithium/080703/ministerial_ordinance.pdf http://www.meti.go.jp/policy/consumer/seian/denan/lithium/080703/technical_requirements.pdf Regards, Tom Tomonori Sato vef00...@nifty.ne.jp URL: http://homepage3.nifty.com/tsato/ - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list.Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald:emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Commercial EMI test software, need opinions on
Ken, I just went through this choosing process and would like to share my experience. My former employer uses TILE. It was excellent as Mike set up everthing for a customer to start with. Due to the transfer of the ownership, It was not on the market early this year. Last May, a technician from ETS-Lindgren tells me that TILE is back to the market. Teseq is a good software. It takes some time to learn how to use it. I was too busy to spend time on it. Teseq had to come back to write programs for our applications. A member of this group was one of the author for that software. It seems this software has a different versions (basic and advance). Find out the details from the sales to avoid future dispute. Members suggested me to have LabView as a backup software. I thank you them for this comment. We had to gather some data during design stage. It is not easy to do so by using most of EMI software package. It took my colleague less than one hour to write one by using LabView. I hope this helps. Regards, Grace On 7/21/08, Ken Javor ken.ja...@emccompliance.com wrote: Forum Members, I am assisting in choosing automated software control for an EMI test facility. I'm old school – REAL old school – and am unfamiliar with any of the following: ETS Lindgren – TILE http://www.ets-lindgren.com/page/?i=Tile Teseq – Compliance 3 http://www.tese .com/com/en/products_solutions/emc_radio_frequency/software/index.php?navid=37 CKC – EMI Test http://www.ckc.com/emitest.asp If any of you have experience with any of these, or others, positive or negative, please let me know off-line. Thank you, Ken Javor Phone: (256) 650-5261 - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Commercial EMI test software, need opinions on
Ken, It seems like we get into a conversation about test software once or twice a year which is good because it seems like it is a subject that is always changing. All of the software programs you list are good. They each have their strengths and there weaknesses. If possible, I recommend you look into getting an evaluation copy and try them out. Or visit some other labs that use the software and let them give you a program tour. Choose the one that best fits your needs. Whatever you choose, dedicate a good chunk of time for the learning curve. I’m not sure what tests you are planning on using this software for but the most complex test is probably radiated emissions. I have worked with some labs who’s initial goals are to have unqualified engineers setup their EUT and press a button on a computer and in a couple hours the test is done with reliable data. In my humble opinion, it is a misconception that fully automated, unmonitored emissions testing can be done. I feel in most cases it is not practical if done right and takes longer than a manual scan. I won’t get into details unless you want. What I recommend is having the test software perform automated tasks to assist and speed up the test while being witnessed by a qualified emc technician or engineer and adapts the test dependent on the EUT and the type of emissions it generates. I wouldn’t call this fully automated test but software assisted emc testing. That way you are not depending on the software but the training and experience of the person running the test and the software is just a tool. Nuff said. As usual, I always make a pitch for NI Labview. Whether you use turnkey software or not, I recommend every lab have Labview and send at least one person to training. Labview has 101 uses in an EMC lab. If you have the time and training you can write your own automated test software. But if not, you can use it to control almost any piece of test equipment in your lab. Here are a few examples of what we use Labview for: Radiated Emissions (controls HP Receiver, turntable and mast controller, AR Switchbox) Line Conducted Emissions (HP Receiver, HP Switchbox) Radiated Immunity (Switchbox, Fieldprobe, Power Meter, Sig Gen, Amp(s), Mast Polarizer. Conducted Immunity (Sign Gen Power Meter) Surge Immunity (Haefely Surge tester) Fast Transient Burst (Haefely Burst Tester) Calibrations: Radiated Immunity Cal and Field Uniformity (also controls a Probotics Field Probe Positioner) Conducted Immunity for data from CDNs and Injection Clamps. Normalized Site Attenuation Insertion loss for testing Cables, Attenuators, directional couplers, etc. LISN calibration and impedance measurements (sig gen, power meter, vector impedance meter) Other: Fluke Data Bucket data acquisition System for thermal testing or EUT Monitoring. Labview program to convert waveforms from Scope to the format of our California Instruments CTS test system for Arbitrary Waveform Generation. Labview program to convert Liberty Labs antenna correction factors data files to the format we need for Emissions testing. Many more. Have fun!!! The Other Brian From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Ken Javor Sent: Monday, July 21, 2008 11:57 PM To: Untitled Subject: Commercial EMI test software, need opinions on Forum Members, I am assisting in choosing automated software control for an EMI test facility. I’m old school – REAL old school – and am unfamiliar with any of the following: ETS Lindgren – TILE http://www.ets-lindgren.com/page/?i=Tile Teseq – Compliance 3 http://www.teseq com/com/en/products_solutions/emc_radio_frequency/software/index.php?navid=37 CKC – EMI Test http://www.ckc.com/emitest.asp If any of you have experience with any of these, or others, positive or negative, please let me know off-line. Thank you, Ken Javor Phone: (256) 650-5261 _ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is
RE: Commercial EMI test software, need opinions on
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Ken Javor Sent: Monday, July 21, 2008 8:57 PM To: Untitled Subject: Commercial EMI test software, need opinions on Forum Members, I am assisting in choosing automated software control for an EMI test facility. I’m old school – REAL old school – and am unfamiliar with any of the following: ETS Lindgren – TILE http://www.ets-lindgren.com/page/?i=Tile Teseq – Compliance 3 http://www.tese .com/com/en/products_solutions/emc_radio_frequency/software/index.php?navid=37 CKC – EMI Test http://www.ckc.com/emitest.asp If any of you have experience with any of these, or others, positive or negative, please let me know off-line. Thank you, Ken Javor I think that the most important decision is to determine what kind of testing you intend to perform. By that, I'm asking if you want to study the EUT, or are you looking only for pass/fail results? Automation is great, until you come up against test conditions that the automation didn't anticipate. For emission testing, find out how the software handles single-event emissions, or low duty cycle pulses. Can you delete data point-by-point, or does a single improper data point invalidate the entire test scan? How easy is it to stop an automated scan and go manual, and then can you resume the automated scan? Can you call for multiple re-scans, or do you have to guess that before the first scan? How easy is it to edit the support files (antenna factors, etc)? How many support files can you use at one time (separate files for an antenna, cable, pre-amp, band-pass filter)? For susceptibility testing, how does the software control the field strength? Does it use real-time monitoring, or a level look-up table? How does the software allow for various modulations (CW, 80% AM, 50% square pulse, other PRR's and durations)? Can an automated scan be paused during a scan, allowing full and easy manual control, and then have the automated scan continued? For all software, find out how open the code is. Are you locked out of the code? For instance, could you prove the dwell times of a frequency stepped scan? What would you have to do if you wanted to buy some new hardware and control it with your existing software? Are data files archived in a format compatible with export to MS Word and Excel? Can support files be edited on a PC and loaded into the test computer, or must you use the test computer to perform all support functions (software support time can cut into operational availability)? For my testing, I have highly automated the emission testing, while deliberately keeping the susceptibility automation to a minimum. I only want my emission software to gather, present and archive the data; I don't want it to even attempt to create reports. I only want my susceptibility software to handle the drudge part of the work; I still want to be in close control of what's happening throughout a scan. In my opinion, complete lab automation is not yet achievable (or even desirable). I think the best way is to separately address the functions of emission and immunity, and apply sufficient automation to assist, but not replace, the EMC engineer. Certainly, my opinions are somewhat biased being based primarily on military testing. However, I become suspicious of highly automated EMC operations; the smoother it looks on the surface, the more likely there's a ground loop (or some other fascinating surprise). Ed Price ed.pr...@cubic.com mailto:ed.pr...@cubic.com WB6WSN NARTE Certified EMC Engineer Technician Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (FAX) Military Avionics EMC Is Our Specialty - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
RE: Commercial EMI test software, need opinions on
Dear Grace, The Other Brian, and 'Old School I agree with Grace's and Other Brian's comments, with one caveat - use LavView as an instrument and table controller, but avoid the use of LabView for numerics, unless you have, for a narrow set of bounds, verified the specific VI using representational data sets. But if the only other crunching tool available is Excel, well use LV. Also, be very careful where accurate time intervals or sync is required - there are some VIs that use the Windoze (system) clock - very bad. There have been several academic studies of numeric software tools, and the results indicate that for common calculations the correctness and accuracy of the numeric VIs is it depends. Disclaimer on my view points - I will use LV when you pry my C compiler and my Python IDE from my cold, dead hands. luck, Brian On 7/21/08, Ken Javor ken.ja...@emccompliance.com wrote: Forum Members, I am assisting in choosing automated software control for an EMI test facility. I'm old school – REAL old school – and am unfamiliar with any of the following: ETS Lindgren – TILE http://www.ets-lindgren.com/page/?i=Tile Teseq – Compliance 3 http://www.teseq.com/com/en/products_solutions/emc_radio_frequenc y/software/index.php?navid=37 CKC – EMI Test http://www.ckc.com/emitest.asp If any of you have experience with any of these, or others, positive or negative, please let me know off-line. Thank you, Ken Javor - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list.Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald:emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Re: Commercial EMI test software, need opinions on
In message 0ed66cd2c9bd0a459d54fb9119a60567b2a...@mailserver.lecotc.com, dated Tue, 22 Jul 2008, Kunde, Brian brian_ku...@lecotc.com writes: I have worked with some labs who?s initial goals are to have unqualified engineers setup their EUT and press a button on a computer and in a couple hours the test is done with reliable data. Avoid such labs. Even if the results are reliable but show a problem, the results almost certainly give no clue as to the cause. Either the client gets no help or has to pay for a second set of tests, diagnostic, which isn't automated. In my humble opinion, it is a misconception that fully automated, unmonitored emissions testing can be done. I entirely agree. I feel in most cases it is not practical if done right and takes longer than a manual scan. I won?t get into details unless you want. What I recommend is having the test software perform automated tasks to assist and speed up the test while being witnessed by a qualified emc technician or engineer and adapts the test dependent on the EUT and the type of emissions it generates. Precisely. I wouldn?t call this fully automated test but software assisted emc testing. That way you are not depending on the software but the training and experience of the person running the test and the software is just a tool. That's what the lab should be providing. The only exception, I think, is if a test schedule worked out that way is then run repeatedly on further samples of EUT, e.g. for the 80/80 rule. That MAY be safely automated, if the results don't show outliers. Nuff said. I disagree with the very last statement, so I said it all again, with feeling.(;-) -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list.Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald:emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
video on PCB troubleshooting
Hi All, A few days ago I put up my second video podcast on finding PCB layout defects. The link then for a ~320x280 resolution was: http://emcesd-podcast.com/weekly_podcasts/weekly_podcast.mp4 I just uploaded the video to YouTube where is has a 425x344 resolution and is streamed by Flash so you don't have to wait for a large file to watch the video. The link to the video is: http://youtube.com/watch?v=CdJuaNlUTqE or you can find it by typing the following in the search field of YouTube.com Finding PCB layout defects If you feel like you want to imbed this video in a website you would add the following code to your site: object width=425 height=344param name=movie value=http://www.youtube.com/v/CdJuaNlUTqEhl=enfs=1; http://www.youtube.com/v/CdJuaNlUTqEhl=enfs=1 /paramparam name=allowFullScreen value=true/paramembed src=http://www.youtube.com/v/CdJuaNlUTqEhl=enfs=1; http://www.youtube.com/v/CdJuaNlUTqEhl=enfs=1 type=application/x-shockwave-flash allowfullscreen=true width=425 height=344/embed/object This is now in the public domain, so it is OK to copy. Doug -- ___ _ Doug Smith \ / ) P.O. Box 1457 = Los Gatos, CA 95031-1457 _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-( ) | o |Email: d...@dsmith.org \ _ /]\ _ / Website: http://www.dsmith.org - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
caster safety
I’m trying to specify casters (wheels) for a 900 lb instrument (408kg). The EN61010-1 safety standard doesn’t really cover this safety aspect. In our case, if one of the casters breaks the machine could tip over and cause injury. Currently our mechanical people are looking at four casters rated 296 lbs each. I know if you roll the machine on an uneven floor all the weight can momentarily be on two or three casters which would exceed the weight limit. Is there a margin built into the caster rating to account for this situation? Is there a formula to use for calculating the distributed weight across the casters/wheels? It would seem logical to me that the wheels would not have to be rated any higher than ½ the total weight. Is there a standard for this? The only thing in the standard that I can find that is close is for handles which have to be rated 4 times the weight of the equipment. That would seem to be very over-kill in this case. Thanks to all for your help. The Other Brian. _ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
Vietnam Local Rep for Telecom/Radiocom Approval
Dear Group, I am looking for a legal licenseholder to act as local rep for Vietnam telecom/radiocom approval. Can anyone help? Thanks Peter - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
