[PSES] test message

Testing, testing, 1, 2, 3... :) br, Pete Peter E Perkins, PE Principal Product Safety Engineer PO Box 23427 Tigard, ORe 97281-3427 503/452-1201 fone/fax p.perk...@ieee.org - This message is from the IEEE

[PSES] EMC on Industrial Cut-Off Saws

I am not at all familiar with this category of products so please excuse my ignorance which is an industrial cut-off saw with a 5hp electric motor for cutting steel rods, and such. Most of these basic model saws have no high frequency devices and brushless AC motors so they do not generate

[PSES] ESD protection for USB 3.0

Hello all, Does anyone have a paper/info on the problems of (and hopefully the solutions for!) ESD protection on the USB3.0 interface? Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) 3032042...@vtext.com (e)

Re: [PSES] ESD protection for USB 3.0

It's generally best to install transient protection on the data lines. Several companies make devices for USB 3.0. I have some info here: http://www.edn.com/electronics-blogs/the-emc-blog/4422551/Protect-Circuits-From-ESD Cheers, Ken ___ Kenneth Wyatt Wyatt Technical

Re: [PSES] ESD protection for USB 3.0

Just finished with a box having USB port - what a pain. Test, testing, and yet more tests are the only way to go. Lotsa stuff and papers from TI, On semi, TE, Littelfuse, etc. If you are very lucky, and the space aliens do interfere, you may be able to find a FAE that actually knows this

Re: [PSES] Historical question, 7 hours

Hi Doug: You are correct. One-half hour to set up, seven hours to test, and one-half hour to record results and take down. Eight-hour day. Works for most equipment. For small equipment, it is a long test. For large equipment (intended for long-term operation), it may be too

Re: [PSES] Historical question, 7 hours

Whatever the reason, may have to go back 100 years. Go to books.google and read Practical testing of electrical machines by Leonard Oulto. Remember that the periods for some test sequences are similar. Same time period also found in other standards for some types of mold stress-relief tests,

[PSES] Test message II

testing, 1, 2 3... :) br, Pete Peter E Perkins, PE Principal Product Safety Engineer PO Box 23427 Tigard, ORe 97281-3427 503/452-1201 fone/fax p.perk...@ieee.org - This message is from the IEEE Product Safety

[PSES] Historical question, 7 hours

All, Today I was reviewing an output overload requirement and once again there is that ubiquitous number of 7 hours in the test duration. I have seen this in a wide variety of tests such as power supply output overloads and short circuits, locked rotor tests, battery reversal tests and so on. Of

Re: [PSES] Historical question, 7 hours

Which is why many of these Type Tests should be automated - human testers miss too much stuff during a long-term test. And choose to not live at work for the 15 day tests required for some of the over-loads that must be done on employer's stuff. Brian From: Richard Nute

[PSES] Google Earth Pro Now Free

FYI: Google has now made their Google Earth Pro available for free (it used to cost $400 for a 1 year license, but demand is so low that it looks like they gave up trying to squeeze some money out of this version). Here’s what the Pro can do that the non-Pro version can’t: * Print

Re: [PSES] Amendments of EN standard

Thanks! Did you mean CENELEC's amendment from A11 for standard no, 6 and A1 for standard no, 5? Regards, Scott On 31 Jan, 2015, at 2:11 am, John Woodgate j...@jmwa.demon.co.uk wrote: In message 30kyfuxz57yuf...@jmwa.demon.co.uk, dated Fri, 30 Jan 2015, John Woodgate

Re: [PSES] Historical question, 7 hours

I have been known to leave tests unattended but only with some pretty extraordinary protections in place.   Hardware based interlocking systems with supervisory features. I used to get inspired by looking around elevator control rooms. All relay based controls in those days.   As for data

Re: [PSES] Google Earth Pro Now Free

I installed Pro last night and it went very smoothly. I am hopeful I can do much more than just see pretty images however. One of my latest personal projects is geospacial data visualization and GIS. Check it out here,http://spatialnews.geocomm.com/articles/googleearthasmapviewer/Now, combine

Re: [PSES] EMC on Industrial Cut-Off Saws

Code of Federal Regulations (CFR) Title 47 Telecommunication Chapter 1 Subchapter A Part 15 15.103 Exempted devices. (c) A digital device used exclusively as industrial, commercial, or medical test equipment. Sounds like it would be FCC part 15 exempt providing the user stops operating the

Re: [PSES] Amendments of EN standard

Scott, I think the CENELEC standards start at 50xxx, and IEC standards start at 60xxx 55xxx. That means CENELEC amendments to: EN 50xxx standards start at A1 EN 60xxx EN 55xxx standards start at A11. Pat On Mon, Feb 2, 2015 at 5:52 AM, Scott Xe scott...@gmail.com wrote: Thanks! Did you