[time-nuts] Recommendations for Mains Power Monitor / Logger

[Hal Murray]

I know of two ways to monitor frequency.  One is to use one of tvb's PICs.  
That needs a good frequency reference, probably a GPSDO.

The other is to use the PPS input on a Linux box.  That uses the system clock 
so you meed a good NTP setup.

Some of the APS family of UPS boxes will monitor the voltage.  You can ask 
what was the min/max since the last time I asked?  (as well as what is the 
current voltage)  That's good enough to catch glitches.

If you want to measure current, I'd start with a current transformer.  I 
don't know of anybody using them for long term measurements.  I've used them 
with a scope to look at startup transients.

-- 
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