RE: OATS Building
Ed points to an interesting fact about working in a OATS. 'Exposure': heat and humidity during several weeks in summer, snow and what have you (gale) in winter. Mind you, there is quite a period in-between the extremes that working in an OATS can be quite pleasant. In the context of the original posters location in the north of Britain, the latter is a bigger problem. UV will degrade most polymer though some faster than others. The green PVC/fiber-glass and Plexiglas structure that I was acquainted to, stood pretty well to the elements. Though I must admit signs of wear appears after the first year, thereafter it settles down (mellow) to give many more years of service. All things being said, a solid well drained 'low-height' brick and concrete 'underground chamber' (under the ground plane) with heating and air-conditioning build under the 'radom' would be ideal. Apart from the occasional ants infestation and the once in a while intrusion by geese, everything about it is good. Wild geese believe (rightly) that all open space is game . . . :-) A possible solution, I suppose, is to keep a dog, preferably a German Shepard to fend off the 'intruder'. Knowing the amount of rain Scotland gets in some winter months, I must put some emphasis on the 'well drained' part because of the possibility of flooding! :-) Just my 2ยข worth. Tim Foo 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
RE: OATS Building
-Original Message- From: Wan Juang Foo [mailto:f...@np.edu.sg] Sent: Friday, February 14, 2003 5:47 PM To: emc-p...@majordomo.ieee.org Subject: Re: OATS Building Walt, I don't think an inflatable structure is going to be a good candidate to be a 'radome' (sp?) unless there is something about it being able to stand to gale force winds that I am not aware about. :-) I must admit that it is a good idea. On a lighter note, a PVC/fiber-glass enclosure not too much unlike the one shown in the URL below will fit the bill. http://www.yorkemc.co.uk/Images/Castleford/collage.jpg It was taken from http://www.yorkemc.co.uk/Emc_testing/castleford.htm Tim Foo A couple of words of caution about an inflatable cover for your OATS, based on my experience with a 30' wide by 100' long by about 15' high air-inflated range cover here in San Diego. 1. It's HOT. I don't know why, but it seems like the infrared portion of sunlight is intensified inside the inflatable. It feels like standing under those marquee heaters. Blowing only ambient 95F air made the inside temp go to at least 115F. You should consider an air chiller circulating fan as well as a pressurization fan, or your techs will quit. 2. If the flexible skin is ever allowed to go unpressurized, especially by accident, you have to plan ways to support the skin without tearing it. You may have to remember to always lay down antenna masts, build safety frames over your test equipment, etc. 3. The UV really degrades the flexible fabric skin. After about 4 years, my structure skin was so degraded, with many little holes and tears and thin spots, that I couldn't get full inflation with the originally very adequate fans. 4. Wind storms are not nice to inflatable structures. The wind can put much force against the side of the bubble. I saw the skirt of my building pick up multiple sand-bags, fly a short distance, and roll up in a big ball. My experience was that inflatables are nice to visit, but you wouldn't want to live there. IMHO. Regards, Ed Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military Avionics EMC Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis 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
Re: OATS building
Hi Folks, I am looking for the best, but low cost, building material to cover a 6M X 8M OATS site. Some years ago I used a test house who had purchased a facility made by a conservatory manufacturer. Made from good quality plastic (UPVC?) panels and plastic windows they had also arranged for ALL fixings to be plastic, even the hinges. Built over a turntable facility with underground pipe (water) to feed power and signals, it worked well. Regards Neil Helsby ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ** 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
Re: OATS Building
Alex, You may want to look at air-cell technology as an alternative. http://www.lindstrand.co.uk/ http://www.southerninflatables.net/ Regds, Walt Walter J. Anderson EMC Regulatory Engineer Symbol Technologies One Symbol Plaza Holtsville, NY 11742 631 738 4492 Alex McNeil alex.mcn...@ingenicofortronic.com 02/13/03 10:10AM Hi Folks, I am looking for the best, but low cost, building material to cover a 6M X 8M OATS site. Preferably to have some see thru panels as I would be operating test equipment from within another building. Is part wood a definite no no? Any ideas? Suppliers would need to be within the UK. Note 1: I live in Scotland and I do not need to tell you what the weather can be like (gale force winds, very wet, occasionally sunny, snowing, freezing... but the golf is good)! Thanks once again for past favours. Note 2. For those interested the I2C bus EFT immunity problem was resolved using I2C buffers at each end of a shielded (foil and braid) cable. Again thanks for those who provided valuable information. Kind Regards Alex McNeil Principal Engineer Tel: +44 (0)131 479 8375 Fax: +44 (0)131 479 8321 email: alex.mcn...@ingenicofortronic.com 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 This email has been scanned for computer viruses. 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
