On 3/8/21 5:28 AM, songbird wrote:
aren't there gizmos that measure the watts being
drawn by clipping them around the plug that goes into
the wall?
AC and DC voltage and current can be measured with general-purpose
electronic test equipment and custom jigs/ cables:
https://www.fluke.com/
https://www.tek.com/
Power is the product of voltage and current, which requires additional
instruments/ processing.
My latest Fluke multimeter includes Bluetooth and can integrate with a
iOS/Android app to do data acquisition, historical trending, etc..
Purpose-built power quality monitoring instruments and associated
software exist, but are expensive.
David
