Re: [PSES] Current measurement

2018-02-12 Thread Brian O'Connell
Following opinions are mine alone, and were heavily influenced by my lunch-time burrito. Looked at one about 10 years past and decided the design was, in my opinion, 'marginal' per scoped safety standards; but have not looked at any recent product versions. Not accurate for high crest-factor

Re: [PSES] Current measurement

2018-02-12 Thread Jon Keeble
Shameless plug follows: check out the "Auditor": DIN rail, 6 channels, three phases, real-time over WiFi or 3G, highly configurable, Class 1, UL61010, etc. around US$200 includes CTs. Jon Keeble wattwatchers.com.au On Tue, Feb 13, 2018 at 8:36 AM, Brian O'Connell

Re: [PSES] FCC 433 MHz

2018-02-12 Thread Schmidt, Mark
Sent from my Verizon Wireless 4G LTE smartphone Original message From: Michael Derby Date: 02/09/2018 4:54 PM (GMT-05:00) To: "Schmidt, Mark" , EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] FCC 433 MHz Original message

Re: [PSES] Current measurement

2018-02-12 Thread alfred1520list
While on the subject, any one familiar with the Kill A Watt meter? This listing sells for US$26 and free shipping: https://www.amazon.com/P3-International-P4460-Electricity-Monitor/dp/B000RGF29Q I swapped out the 2 mOhm current sensing resistor with a 0.2 ohm resistor (and of course greatly

Re: [PSES] Current measurement

2018-02-12 Thread Brian O'Connell
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

Re: [PSES] Current measurement

2018-02-12 Thread Ghery Pettit
VA. You don't have any phase information when the two variables are measured separately. Ghery -Original Message- From: Amund Westin [mailto:am...@westin-emission.no] Sent: Monday, February 12, 2018 1:05 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Current measurement If you want

Re: [PSES] Current measurement

2018-02-12 Thread Ken Javor
Unless you can look at both voltage and current on an o'scope and compute phase angle between them, you are only measuring apparent power. Ken Javor Phone: (256) 650-5261 > From: Amund Westin > Reply-To: Amund Westin > Date: Mon, 12 Feb

[PSES] Current measurement

2018-02-12 Thread Amund Westin
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