Doug A bulk current injection test (MIL-STD-461D, CS114, CS115, CS116) can be considered in lieu of radiated immunity, at least up to VHF and low UHF frequencies.
DB > ---------- > From: Doug Frazee[SMTP:[email protected]] > Sent: Friday, December 18, 1998 1:22 PM > To: '[email protected]' > Subject: EMC Directive Field Testing of Large Equipments > > I would like to compile thoughts and techniques that members of this group > use to perform "in situ" tests on large industrial apparatus. > Considerations I have typically encountered include: > > Current draw in excess of available LISN capacity. Use CISPR voltage probe > Current draw in excess of available EFT & surge coupling network capacity. > EFT, use 33nF cap. Surge,? > 3 or 10m EUT to antenna distance not achievable and/or high ambients. > Lab type radiated immunity not practical due to interference potential. > Large equipments requiring multiple antenna locations or search and > optimize considerations for radiated emissions. > > I am especially interested in potential alternate techniques for radiated > immunity. Potential solutions may include ad hoc testing using actual > transmitters, eg cell phones, VHF, etc. Testing at discrete frequencies of > known public broadcast bands. Extended frequency conducted immunity > testing. > > If you have thoughts or other considerations, please respond to the group. > As US labs are granted CAB status, consensus on these, and other issues > will be helpful. > > Doug Frazee > Lead Compliance Engineer > Windermere Military/Commercial Compliance Laboratory > Annapolis, MD > USA > [email protected] > > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to [email protected] > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to [email protected], > [email protected], [email protected], or > [email protected] (the list administrators). > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
