Actually there is only one!
It depends!
From: emc-p...@ieee.org [emc-p...@ieee.org] On Behalf Of John Shinn
[jmsh...@pacbell.net]
Sent: Thursday, December 01, 2011 5:55 PM
To: Sundstrom, Michael; John Woodgate; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re:
I've been reading through Vol 2 of Electromagnetic Interference and
Compatibility and the author writes that the QP detector is distinguished
from the peak detector by its time-constants. The charge time-constant
being 1ms and discharge time-constant either 160ms for HF or 550ms for
VHF
Anyone know the status of NRCan regulations for battery chargers? Was
supposed to be scoped with #12, but I can find no reference to impending
rules.
thanks,
Brian
-
This message is from the IEEE Product Safety Engineering Society
Dear All
For a 5 vdc USB powered lithium battery charger, is iec 60950-1 the appropriate
safety standard or iec 60335-2-29? The charger is intended to charge the
battery located on a bicycle frame.
Also, what are the applicable North American and EU standards applicable for
this battery
Messy answer to difficult question. I have had some interesting
conversations with several different agency engineers; that is, no
agreement; so just tell them which standard to use. USB cannot always be
considered LPS IAW 60950/2.5, so would test as 'dc mains' device. Most NRTLs
will gladly take
If an antenna, current probe or other transducer is going to be calibrated
over its frequency range of operation, what determines the step sizes
between measured frequencies, or if swept, what determines the density of
test points reported?
Thank you,
Ken Javor
Phone: (256) 650-5261
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I recently had occasion to verify on an 8591EM generic factors for an
EMCO current clamp during pretest, and used its tracking generator to
see if with a short wire the result was a straight line on the screen.
That simply called for paying attention to 1/BW.
Cortland
KA5S
On 12/5/2011 5:33
If at 100 MHz your sensor indicates during calibration 10 dB
and at 120 MHz 12 dB, how are you going to know the value at
110 MHz. It maight be 20 as well as 0 dB, you don't not know as you did
not measure/ calibrate.
This requires some knowledge about the behavior of the sensor,
and the 1/BW is
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