HI Larry, was this really required, in 17025, or is your assessor/accrediting body asking?
If you are following a standard calibration method, I'm not sure you are REQUIRED for have a procedure. That said,I believe strongly in writing detailed work instructions ( what we call them), photographs really really help. Thoughts? Derek. Larry Stillings wrote: > One other thing to add to this thread (as we just went through an audit) is > you will need to write a test procedure for the calibration (preferably with > pictures of the calibration setup). > > Larry Stillings > > -----Original Message----- > From: rehel...@mmm.com [mailto:rehel...@mmm.com] > Sent: Thursday, December 11, 2008 10:45 AM > To: emc-p...@ieee.org > Subject: RE: DIY Equipment and Calibration > > I believe that you will also need your calibrating equipment traceable to a > National Standards group such as NIST in the US. > > Bob Heller > 3M EMC Laboratory, 76-1-01 > St. Paul, MN 55107-1208 > Tel: 651- 778-6336 > Fax: 651-778-6252 > ============================================================== > > > > "Spencer, David > H" > <David.Spencer@xe To > rox.com> <cmander...@micron.com> > Sent by: <emc-p...@ieee.org> > emc-p...@ieee.org cc > > Subject > 12/11/2008 08:04 RE: DIY Equipment and Calibration > AM > > > > > > > > > > Chris, > > I've built several CDN's. Repaired both CDN's and LISN's. Never messed > with building an EM clamp. Too much hassle IMO. > > As far as calibration, I try to calibrate as much as is practical "in > house". All the LISN's, ISN's, CDN's, cable loss, amplifier performance, > etc etc . But in reality those "calibrations" are just "verifications". > To perform those verifications most people are lacking a network impedance > analyzer. The test jigs or setups are easy to build or cheap to purchase. > > Regarding an accrediting organization accepting the results, you'll need a > process. You can't go wrong by referencing CISPR 16 et. al. in that > respect. You'll need the verification data. AND, you'll need the > measurement uncertainty. > The last item, you can gather from your impedance analyzer accuracy > specifications (and calibration report) and the test jig VSWR & losses. > > As for where you can send you in-house built test items, most any ISO17025 > test lab which calibrates EMC or similar devices can perform the > calibration. > > > Regards > > David Spencer > EMC Engineer > Xerox Corp. > > From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of > cmander...@micron.com > Sent: Wednesday, December 10, 2008 5:00 PM > To: emc-p...@ieee.org > Subject: DIY Equipment and Calibration > > > > I'm aware of some people making their own CDN's and LISN's among > other things and I have few questions about that. > 1) Has anyone tried to build their own EM Injection clamp? > If so, were you able to find a ferrite supplier that sold > half-ring cores? > 2) Is it acceptable to calibrate your own equipment? > If so, how do accrediting bodies view this, and what > documentation will they want to see? > If not, does anyone have suggestions about where in the US I > can send such homemade equipment for calibration (preferably Western > US to save on shipping)? > > > Thanks, > Chris > > > - > ---------------------------------------------------------------- > 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 <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at > http://www.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to > that URL. > > > Website: http://www.ieee-pses.org/ > 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 <emcp...@ptcnh.net> > Mike Cantwell <mcantw...@ieee.org> > > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org> > David Heald <dhe...@gmail.com> > > > - > ---------------------------------------------------------------- > 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 < > emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at > http://www.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to that > URL. > > > Website: http://www.ieee-pses.org/ > 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 <emcp...@ptcnh.net> > Mike Cantwell <mcantw...@ieee.org> > > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org> > David Heald <dhe...@gmail.com> > > - > ---------------------------------------------------------------- > 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 > <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to that > URL. > > Website: http://www.ieee-pses.org/ > 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 <emcp...@ptcnh.net> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> > > - > ---------------------------------------------------------------- > 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 > <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > Graphics (in well-used formats), large files, etc. can be posted to that URL. > > Website: http://www.ieee-pses.org/ > 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 <emcp...@ptcnh.net> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> > - 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 <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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 <emcp...@ptcnh.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
