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Author Topic: Electronic Watt Hour Meter Circuit  (Read 873 times)

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ibedonc

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Electronic Watt Hour Meter Circuit
« on: April 01, 2008, 05:49:46 PM »
« Last Edit: April 01, 2008, 05:49:46 PM by (unknown) »
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Ungrounded Lightning Rod

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Re: Electronic Watt Hour Meter Circuit
« Reply #1 on: April 02, 2008, 03:38:52 PM »
They should sample the voltage at the plug, not the input, to get the power consumed by the load.  They're measuring upstream of the shunt, which means they're not accounting for the voltage drop and thus adding in the power burned in the shunt.
« Last Edit: April 02, 2008, 03:38:52 PM by (unknown) »
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