Seaward changed/updated their algorithm/programming-not sure when but it hasn’t been too long ago. May be worth contacting them again to see if your unit could benefit from the upgrade (I think you have to send it in).
Brian > On Sep 24, 2018, at 12:18 PM, Dave Tedeyan <[email protected]> wrote: > > Does anyone here have a good understanding of the Seaward PV210 curve tracer? > I recently went to commission a commercial site where nearly all of my 90 > traces did not come out looking right. It looks like the tracer is just not > taking enough data points to come up with a good trace. It also was not > consistent. > > In the attached file, the two strings that have a Voc of about 800V were > actually the same string. It seemed random that the tracer would take more or > less points, and then come out with wildly different fill factors. > > The only times that it seemed to take more data points to come out with a > (relatively) good curve was when the irradiance was changing during the > trace. That is the third trace on the graph of a different string with Voc of > about 435V. > > I have not used this a ton, but in the past I have gotten good traces out of > it. When I had seen this in the past, I contacted Seaward, and they gave me a > free calibration, even though it had been well under a year since I owned it. > But they did not address the issue I am seeing here. > > So does anyone know why I might not be getting a good curve, and if there is > anything that can be done about it? > > Thanks, > Dave > > Dave Tedeyan > Senior Engineer | Taitem Engineering, PC > > 10 Verizon Lane | Lansing, NY 14882 > o. 607.930.3481 x6 f. 607.277.2119 > www.taitem.com > > Solar • Sustainability • Energy • Design > B-Corporation Best for the World 2018 Honoree > <test.pdf> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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