Another option is to belong to the FNET/GridEye group operated by the
University of Tennessee (http://fnetpublic.utk.edu/index.html). They
have placed frequency/voltage monitors all over the United States; they
also list sites out side USA but I don't know if those are their
devices. The monitors use GPS for time and location information and send
the data over an ethernet link to your router and hence to U of Tenn via
the Internet. If you look at the "Table Display" page in their web site,
I am Unit #853 in the Western Interconnection.
Jeremy
On 12/31/2016 9:07 PM, Chris Albertson wrote:
Just a comment for anyone who wants to log line voltage v. time. If
you have an APC "Smart UPS" battery backup unit these will log voltage
and frequency to a file. The unit connects to a computer via USB (and
an AC power cable).
You can collect data over a wide area using these power supplies,
logging data can be pushed over a network.
I would not buy an UPS just to log power statistics but many people
already have these
So you might wonder what is the line voltage in your lab. If you have
computer "server" of some kind you might also have an UPS and then you
might already have logs of voltage and frequency going back for years.
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