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
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