Hi Charles, hope you are well
In a previous job we used a xenon arc searchlight, originally intended for naval use, for making solar heat loading measurements on outdoor high brightness LCD monitors. This was roughly calibrated with temperature measurements on a matt black metal plate the same size as the display that had resistors bolted to the back. The power was set for around 1kW/m^2 which was considered to be a worst case for sunlight loading. The spectrum pretty closely matches that of the sun - well, good enough for government work ;) and the quartz glass front kept all the UV inside. Being an arc lamp, I'm guessing it wouldn't be terribly suited as support equipment for radiated emissions measurements! Anyway, all this assumes a chamber measurement. Surely a nice sunny Colorado OATS site would be perfect for the job? Bracing at this time of year? All the best James From: Edward Price <e...@jwjelp.com> Sent: 14 February 2019 21:37 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Testing a product with that uses a solar panel Ken: I got the impression from the original question that the solar panel was integrated with an inverter. That means that there might be coupling interactions between the inverter circuitry and the solar panel array conductors and/or the solar panel support structure. Indeed, the whole solar panel might be radiating noise that is backing up from the inverter. Ken, do you recall what type of light source they used to use for those high-vacuum chambers that were used to simulate a true space environment for satellites? Those lights would have an optimal light spectral characteristic. Chuck might want to see if he can access one of those facilities; they could do a solar exposure inside a shielded volume, and they wouldn't have to pull a vacuum. Maybe somebody in the solar panel industry has set up an RF shielded enclosure dedicated to solar panel testing. I could imagine about a two-foot diameter Solar Tube equivalent device, fitted at the top with a sun-tracking heliostat, directing the sunlight through a honeycomb filter enclosure penetration and onto the solar panel EUT. Ed Price WB6WSN Chula Vista, CA USA From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: Thursday, February 14, 2019 8:54 AM To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] Testing a product with that uses a solar panel I am well aware that an incandescent light bulb doesn't emit the same spectral signature as received from the sun. But the test is not about the detailed performance of the solar panel, but only that the device-under-test runs off electricity generated by the solar panel. Unless the EMI signature somehow depends on the type of light impinging on the panels, as opposed to a nominal electric output from the panels, it would seem that any electrically quiet light source would suffice. Ken Javor Phone: (256) 650-5261 _____ From: Scott Aldous <00000220f70c299a-dmarc-requ...@listserv.ieee.org <mailto:00000220f70c299a-dmarc-requ...@listserv.ieee.org> > Reply-To: Scott Aldous <scottald...@google.com <mailto:scottald...@google.com> > Date: Thu, 14 Feb 2019 08:27:27 -0800 To: <EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> > Subject: Re: [PSES] Testing a product with that uses a solar panel Hi Ken, A 500W incandescent light will give you some voltage/current from your solar panel, but it won't be representative of actual sunlight if this is important to your test. The spectrum (or energy) for artificial light will not be the same as the spectrum of sunlight. UL 1703 makes reference to a few different standards, including ASTM E927 <https://www.astm.org/Standards/E927.htm> , which describes performance requirements for a solar simulator <https://en.wikipedia.org/wiki/Solar_simulator> . IEC 60904-9 <https://webstore.iec.ch/publication/3880> does the same. Here <http://www.eternalsun.com/industries/certification/> <http://www.eternalsun.com/industries/certification/> is an example of a solar simulator manufacturer claiming that their product is appropriate for PV cert testing, including for IEC 61215 <https://webstore.iec.ch/preview/info_iec61215-1%7Bed1.0%7Db.pdf> . This is very likely overkill for what you need to do, but you should be aware of the limitations of using a common incandescent. IEC 62920:2017 covers PCE (power conversion equipment, i.e. the inverter), but not the modules themselves so I don't believe it has guidance on an artificial light source. On Thu, Feb 14, 2019 at 2:09 AM John Woodgate <j...@woodjohn.uk <mailto:j...@woodjohn.uk> > wrote: CISPR 11:2015 CSV covers radiation. IEC 62920:2017 is also needed. Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk <http://www.woodjohn.uk> <http://www.woodjohn.uk> <http://www.woodjohn.uk> Rayleigh, Essex UK On 2019-02-14 03:36, Ken Javor wrote: Waited to see if anyone would answer and didn't see any answers, so what about a 500 W work light? They are incandescent. Ken Javor Phone: (256) 650-5261 _____ From: "Grasso, Charles" <charles.gra...@dish.com <mailto:charles.gra...@dish.com> > <mailto:charles.gra...@dish.com> <mailto:charles.gra...@dish.com> Reply-To: "Grasso, Charles" <charles.gra...@dish.com <mailto:charles.gra...@dish.com> > <mailto:charles.gra...@dish.com> <mailto:charles.gra...@dish.com> Date: Wed, 13 Feb 2019 21:29:42 +0000 To: <EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> > <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Conversation: Testing a product with that uses a solar panel Subject: [PSES] Testing a product with that uses a solar panel Hello, I need to test a solar panel powered product for Radiated Emissions. The solar panel is integrated with the electronics. Does anyone have any ideas on how to have the panel function when testing in a chamber? I am looking at you test labs!! Thanks! Charles Grasso W: 303-706-5467 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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