Hi It’s been quite a while since I bought anything other than a pure sine UPS. They really aren’t as expensive as they once were. You may find them a bit cheaper from outfits like CyberPower than from APC. Sometimes it s a bit tough to work out exactly what is or is not a pure sine wave unit. If you want a full “always on” pure sine device, they are still a bit expensive.
Bob > On Sep 15, 2016, at 2:13 PM, Jeremy Nichols <[email protected]> wrote: > > Your point is well made. My question is: what happens to the quality of the > output sine wave if I use anything other than a true sine-wave (i.e., > expensive) UPS? Most of them these days produce a semi-sine wave (aka > modified square wave) that may or may not play well with the 105B. Anyone > have experience? > > A external battery and appropriate chargers and cabling does sound like > another good alternative. Harder to move around but I don't (yet) have such a > need, only that the 105B stay "on" regardless of power failures. > > Jeremy > > > On 9/15/2016 10:15 AM, Bob Camp wrote: >> Hi >> >> A bigger question becomes: >> >> Do batteries inside equipment make much sense anymore? >> >> These days, a UPS is often a standard part of a rack in an outage prone >> area. Powering >> the “whatever” instrument off of the same UPS as the rest of the stuff is >> one obvious >> answer. >> >> The other answer is an even older approach. Use a battery bank that is >> external to all >> the gear in the rack and tend it independently of each box in the rack. That >> way you have >> a few very large cells to worry about rather than a whole bunch scattered >> about. Things like >> lead acid that are impractical in a piece of gear are more of an option in >> an independent >> battery box. A single charger / line supply makes it easier to invest in >> something with real >> smarts in it. The advent of dirt cheap isolated switchers makes the >> conversion to instrument >> voltages a lot easier than it once was. Pick a common voltage like 12, 24, >> or 48V and run with it. >> >> My answer to the frequency standard battery pack question has become “don’t >> do it”. It makes >> them a *lot* lighter weight !!! >> >> Bob >> >> > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
