>... > If you have the capability of testing your WUPs, I'd certainly be > interested in what you find. I'd like to think that maybe the problem > is in just this one revision of firmware. But I suspect not. > > John
Thanks much for your thoughts about the WUP. I might have guessed there were power-nuts out there! Very interesting. I guess I haven't worried about the power factor. What I do very much like about the WUP is the well-designed (and even documented) serial interface, the choice of command/response or periodic talk-only modes, and the clean design inside. You can see some of my WUP power plots here: http://www.leapsecond.com/lab/lab.htm I have not done much accuracy testing. For my lab, at this point at least, I'm much more concerned with power stability than accuracy. One of my big surprises was that none of my fancy UPS's give good power stability, so I'm migrating to "online" or "double conversion" UPS's which solve this problem. BTW, one digital power meter that I gave up on is: http://www.brandelectronics.com/meters.html Would appreciate any comments you have on this. The other power meters I'm using are by DMMetering. See eBay item 170102236411 and others by the same seller. These are 800 pulses per kWh and I log their data using a Newport/Omega iFPX internet counter: http://www.newportus.com/i/ifpx.htm I've monitored DC power with these two: RC Electronics, Watts UP WU100 http://www.rc-electronics-usa.com/ http://www.powerwerx.com/category.asp?CtgID=3587 Medusa Power Analyzer II (yet another vendor that dropped RS232 for USB) http://www.medusaproducts.com/ http://www.westmountainradio.com/PWRmetersRC.htm /tvb _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
