HI Ghery, I asked the same question... The only one I can think of is ESD, but that doesn't tell me why. More importantly, what evidence is there documenting the effects?
I think, until facts are published, confirmed and quantified, that the Standards body is shotgunning environmental requirements. What on earth is the value of recording something if all it is is documented? I doubt few people if anyone will ever pay any notice. It's all just adding cost to testing. Sincerely, Derek Walton Pettit, Ghery wrote: > > Certain immunity tests in the IEC 61000-4-x series require that the > barometric pressure be within a certain range. Typically not an issue, > unless your lab is in some place like Denver, Colorado (or higher). > Then you might be pushing the low end of the allowable pressure range. > And, regardless, you need to record the conditions present at the time > of the test. > > Ghery Pettit > > Intel Corporation > > ------------------------------------------------------------------------ > > *From:* [email protected] [mailto:[email protected]] *On Behalf Of > *Ralph McDiarmid > *Sent:* Monday, March 31, 2008 1:38 PM > *To:* [email protected] > *Subject:* RE: Looking for Barometric pressure meter > > Why is a calibrated barometric pressure reading important for an EMC lab? > > Ralph McDiarmid, AScT > Compliance Engineering Group > Xantrex Technology Inc. > > *From:* [email protected] [mailto:[email protected]] *On Behalf Of > *Pettit, Ghery > *Sent:* Saturday, March 29, 2008 4:58 PM > *To:* [email protected]; Garnier, David S (GE Healthcare); > [email protected] > *Subject:* RE: Looking for Barometric pressure meter > > The information provided by the FAA and weather guessers is pressure > corrected to sea level. It is not the actual pressure. I can get an > altimeter setting in Denver (mile high) or Olympia (206 ft MSL) and it > will be in the same range, even though the actual pressure in Denver > is about 5 inches of mercury lower. This is one of my favorite > questions when auditing a lab when they have a barometer on the wall – > is that absolute pressure, or corrected to sea level? And I usually > get blank looks. And you want to report absolute pressure. > > Ghery Pettit > > PP-ASEL > > ------------------------------------------------------------------------ > > *From:* [email protected] [mailto:[email protected]] *On Behalf Of > *Cortland Richmond > *Sent:* Saturday, March 29, 2008 2:44 PM > *To:* Garnier, David S (GE Healthcare); [email protected] > *Subject:* RE: Looking for Barometric pressure meter > > Why not get the air pressure from the nearest FAA control tower by > radio? Critesfield Airport in Waukesha broadcasts airfield information > that includes updated barometric pressure > > http://www.critesfield.com/facilities/ > > Cortland > > KAS/6 > > ----- Original Message ----- > > *From:* Garnier, David S (GE Healthcare) > <mailto:[email protected]> > > *To: *[email protected] <mailto:[email protected]> > > *Sent:* 3/28/2008 10:25:25 AM > > *Subject:* Looking for Barometric pressure meter > > Hello, > > I am looking for advice or suggestions for the purchase of a > Barometric pressure meter for our EMC lab... > > - ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc - > ---------------------------------------------------------------- This > message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > > - ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc - > ---------------------------------------------------------------- This > message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
