[Boatanchors] Long-term AC voltage monitor

[K0DAN]

Radio Schlock makes a pretty good multimeter which has a PC interface. I 
have used it to do long-term monitoring of my AC line.

http://www.radioshack.com/radioshack-true-rms-46-range-digital-multimeter/2200087.html#q=digital%2Bmeter&start=5

73
dan
k0dan

-----Original Message----- 
From: Rick Poole WA1RKT
Sent: January 05, 2015 09:32
To: boatanchors at mailman.qth.net
Subject: [Boatanchors] Long-term AC voltage monitor

Most boat anchors, it seems, were designed for an AC input voltage of 
nominally 110-115VAC.  These days voltages are more like 120-125, from most 
reports, so folks are recommending a bucking transformer or variac in the AC 
line.

I'm looking for a CHEAP (sorry, gotta be cheap) AC monitoring device, such 
as a USB voltmeter that stores its readings periodically on a computer, that 
I can use to monitor AC mains voltage around here and see if I have a 
problem.  I periodically stick a multimeter into the AC socket and rarely 
see anything above 120 (last I looked it was 118.2) but that only tells me 
what the voltage is when I'm looking, doesn't tell me about any other time.

Something that plugs into a USB port, with software to periodically store 
the results, would work, but Google hasn't been much help in finding one of 
those.  The Yoctopuch Yocto-Volt from Switzerland will do it but the US 
distributer is out of stock with no indication when or if they will ever 
have any more.  I can order from Switzerland if I absolutely must but 
something that's available in the US would be better.  There's also the 
Electronics-DIY USB Voltmeter but there is nothing that indicates that works 
on AC (it looks like the input goes directly into a PIC device through a 
voltage divider so it's tough to imagine it working on AC).

Any suggestions?  Thanks...

Rick WA1RKT
Londonderry, NH
Catch me on 14.300 MHz Intercon / MMSN most days
    also occasionally on 7.255 ECARS
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