Re: Negative logic IO

2000-03-13 Thread Paul McCoy
is as likely as an inadvertent short to ground), and also for cases where you would rather have the control function occur than have it disabled by a fault. I hope this helps, I hope some of our dedicated safety members will jump in and shed some light. Paul McCoy "Dan Kinney (A)" wrot

Re: conducted emissions test setup

2000-02-24 Thread Paul McCoy
ng compared to the 50 uH developing impedance in the internal branch of the LISN leading back to the power source, but to the 50 ohm characteristic impedance of the RF connection to the Spectrum Analyzer. At 1 MHz the reactance of a 6 - 7 uH inductor is around 50 ohms an it increases from there. Paul M

Re: EN55103-1 and -2 Loop sensors & coils

2000-01-25 Thread Paul McCoy
probe as specified in the standard. You are allowed to use the theoretical calibration factors given if you construct the probe as described in Annex A Paul McCoy Benoit Nadeau wrote: > Bonjour de Montreal, > > I am presently looking to buy some test apparatuses to perform testing >

Re: EN60950 Earth Leakage Measurement Circuit.

1999-11-25 Thread Paul McCoy
wo parallel pairs in series (0.22uF). I wouldn't want to design that for a production run product, but a little mix and match for test equipment shouldn't be too bad if you can live with four capacitors. I hope this helps, Paul McCoy duncan.ho...@snellwilcox.com wrote: > Group,

Lawn mowers anyone?

1999-09-30 Thread Paul McCoy
ion engines"? Is there an harmonized standard that covers lawn mowers, chain saws, emergency generators, and other non-vehicular internal combustion applications, or are you expected to make the IC engine meet the generic emission requirements of 50081-1? Thanks in advance for any help, Paul

Re: Shipping and CE-marking installations

1999-09-22 Thread Paul McCoy
ich should provide some form of the statement above, the Manufacturer's name, address, and contact person, the manufacturer's European representative's name, address, and contact person, and the name, address, and contact for the customer where the installation is taking place. - Paul

Re: NSA (using acid)

1999-07-30 Thread Paul McCoy
. I don't know why you were cautioned not to rinse, I would have thought it desirable, but the acid will preferentially eat the zinc coating because Zinc is higher in the electrochemical reduction series than the underlying iron (sacrificial anode). Paul McCoy Brian At Work wrote: >

Re: Harmonics (EN 61000-3-2) testing of EUT's > 1KW

1999-07-27 Thread Paul McCoy
ase. Add some large power resistors across the line to make the unit use more than 16 Amps per phase and you are exempt! ;-) Good Luck, Paul McCoy "Ehler, Kyle" wrote: > Hello, > I've just come across an ITE product that fails power line harmonics (EN > 61000-3-2). > Natu

Re: Magnetic Reed Switches

1999-07-27 Thread Paul McCoy
silver will tarnish (oxidize) more readily than gold it was still a good choice for many applications since silver oxide was also conductive. Has somebody sold me a bill of goods? - Paul McCoy - "WOODS, RICHARD" wrote: > Reed switches are available with a variety of contact materials (s

Re: Product Safety Semantics

1999-07-19 Thread Paul McCoy
with the term "shall" above; and sprinkled through the North American standards to confuse hard working compliance engineers. To my knowledge the europeans are extremely consistent with the use of "shall", "should", and no other terms. - Paul McCoy - John Juhasz wrote

Re: EN equivalent to UL1951

1999-07-14 Thread Paul McCoy
maintained by DG III - Paul McCoy - fwhitfi...@rheintech.com wrote: > Hi everyone, > > I am currently involved with safety testing of a product which I know > falls under UL1951 - Safety of Electric Plumbing Accessories. > > The device also needs to be tested for compliance

Re: LFM test rig

1999-05-05 Thread Paul McCoy
er and add some exit ports at the opposite end of the box for the air to exhaust. If this helps you I am : Paul McCoy emmas...@execpc.com If this is useless information I am: some worthless hacker, stealing the web identity of a fine engineer to drag his name through the mud Dan Mitchell wr