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Old 04-05-14, 03:05 PM   #6
wuck
Helper EcoRenovator
 
Join Date: Nov 2013
Location: Sonoma County NorCal
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Quote:
Originally Posted by NiHaoMike View Post
Measuring standby power - Page 1

I modified one of mine to do just that, but I also added a pair of inverse diodes to provide protection against inrush and a switch so it can be used in "normal" mode. (There are lots of gotchas to adding a switch if you want anything resembling an accurate measurement!)
OK Mike, I'll bite. Considering you're switching a 2 mOhm (.002 Ohm) shunt in & out, What kind of switch did you add and were you able to test the calibration afterwards? I saw "The Electrician" in the other forum was able to test his with a nice scope/app.

I don't own a kill-a-watt, but I purchased a WattsUp? similar device many years ago. It's hard at work logging my new refrigerator at the moment. I did open it up several years ago, but can't remember what I saw in there.

Pat
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