[time-nuts] Line Voltage [Was: Anyone (ideally in the UK) ...]
Ruslan Nabioullin
rnabioullin at gmail.com
Sun Jan 1 06:00:14 UTC 2017
On 01/01/2017 12:07 AM, 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).
As a more professional alternative, I suggest installing a power quality
analyzer, particularly the Dranetz 658, which can be had for a modest
amount off eBay. If I remember correctly it is from the late 80s era,
but nevertheless is very feature-filled---modular (mainframe with cards
for: 4 channels for v, V, i, I, and f [incl. harmonic distortion
analysis to the 50th. harmonic]; environmental monitoring [T, RH,
radiated RF, conducted RF]; etc.), physically robust (but not
rackmountable, I believe), is networkable with another such unit and of
course interfaceable with a server via RS-232, and has a human interface
right on the unit (incl. an entire miniature keyboard, floppy drive for
memory expansion, and even a built-in thermal printer!) When I was
doing research, I could not find any other power quality analyzer that
is physically robust, not to mention cheap, and those IT environmental
monitors were underwhelming (no modularity, no RF probing, etc.), so I
opted for this model for monitoring home metrology and METI lab and
datacenter conditions, incl. the solar generation subsystem.
-Ruslan
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