In reply to David Roberson's message of Sun, 26 May 2013 22:35:09 -0400 (EDT): Hi,
This is a little different. A full bridge rectifier will allow for both halves of the AC current to pass, and so it should be measured as little different to a purely resistive load. However a single diode will only allow one half to pass, which *may* mess up magnetic field based current measurements. (I guess whether if does or not depends on the sophistication of the device.) > >Assume that you have a bridge rectifier in the blue box. This is followed by >a filtering capacitor. The DC is then used by the electronics connected to >the capacitor. Are you saying that it is not possible to determine the power >input to this type of network by measuring the input AC voltage and current? >Or are you saying that someone has performed a scam and put a DC supply in >series with the normal AC voltage? > >You do know that this could easily be measured by a simple DC voltmeter, right? > >Dave [snip] Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
