Will admit to having done this stuff with using microcontrollers and discrete 
sequential data channels and of sufficient sampling speed, but am subject to 
frequent bouts of idiocy. And this was for process control, and thus not a Type 
Test. Also, note that there is a difference in technique and equipment between 
power loggers and an analytical instrument.

Best done with an instrument intended for this measurement; that is 'power 
analyzers'. Typically found on shelves at Keysite, Tektronix (nee Voltech), 
Ametek, Chroma,  etc. And many Tek and keysite DSOs have a 'plug-in' for doing 
power measurements. All of this instrument-grade stuff can easily handle 
external sensors.


-----Original Message-----
From: Amund Westin [mailto:am...@westin-emission.no] 
Sent: Monday, February 12, 2018 1:05 PM
Subject: [PSES] Current measurement

If you want to calculate the consumed power (W) in a 1-phase AC circuit, you
can use a current clamp-on device to measure the current in one lead/wire
and multiply with the applied voltage.
But with such a current clamp on device, to we measure the apparent power
(VA) or the real power (W)?

Best regards

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 

All emc-pstc postings are archived and searchable on the web at:

Attachments are not permitted but the IEEE PSES Online Communities site at 
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used 
formats), large files, etc.

Website:  http://www.ieee-pses.org/
Instructions:  http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
Scott Douglas <sdoug...@ieee.org>
Mike Cantwell <mcantw...@ieee.org>

For policy questions, send mail to:
Jim Bacher:  <j.bac...@ieee.org>
David Heald: <dhe...@gmail.com>

Reply via email to