>> >>> It should be obvious that any such device will need to be powered by
>>> some sort of UPS. Whereupon you may as well use a UPS.
>> I don't see why a simple power monitor/logger gadget can't be battery
>> powered, or more precisely, line powered with battery power to carry
>> it over the hopefully rare occasions when the line power fails,
> That battery "back-up" _is_ a UPS. A "simpleton" DC-output
> variety, but a UPS nonetheless *grin*
Guys, this is a simple commercial product, and it's sold by a bunch of companies. Fluke makes a very nice one. You can probably rent one from a local test equipment rental, or you might be able to call your power company and have them leave one on your line for a week or two.
--scott
"C'est un Nagra. C'est suisse, et tres, tres precis."